The document states that grid-connected projects should scientifically determine the types of new energy power sources and their installed capacity in accordance with the “source matching load” principle, and the scale of electricity demand must be based on solid evidence and supporting data. The project may participate in the spot market primarily through self-generation and self-consumption, with surplus power being fed into the grid as a supplementary arrangement. The annual grid-connected electricity output shall not exceed 20% of the total available generation capacity. The project’s overall annual renewable energy consumption should account for no less than 60% of the total available generation capacity and no less than 30% of the project’s total electricity consumption, with a commitment to continuously increase its self-consumption ratio to at least 35% by 2030.
Details are as follows:
Hunan Provincial Development and Reform Commission
Notice on Issuing the Implementation Plan for Orderly Promoting Direct Connection of Green Electricity in Hunan Province
Hunan Development and Reform Commission Energy Document No. 853 of 2025
To All Relevant Units:
In order to thoroughly implement the spirit of documents such as the “Notice of the National Development and Reform Commission and the National Energy Administration on Matters Concerning the Orderly Promotion of Direct Connection of Green Electricity” (NDRC Energy Document No. 650 of 2025) and the “Notice of the National Development and Reform Commission and the National Energy Administration on Improving Price Mechanisms to Facilitate Local Consumption of New Energy Power” (NDRC Price Document No. 1192 of 2025), to promote local consumption of new energy and better meet the green energy needs of enterprises, and in light of our province’s actual conditions, our Commission has formulated the “Implementation Plan for Orderly Promoting Direct Connection of Green Electricity in Hunan Province.” This plan is hereby circulated to you; please organize and implement it conscientiously.
Attachment: Hunan Province’s Implementation Plan for Orderly Promoting Direct Connection of Green Electricity
Hunan Provincial Development and Reform Commission
December 30, 2025
Attachment
Hunan Province’s Implementation Plan for Orderly Promoting Direct Connection of Green Electricity
Chapter 1 General Provisions
Article 1 [Purpose and Basis] In order to facilitate the local consumption of new energy, meet enterprises’ demand for green energy use, and promote the scientific and orderly development of green electricity direct-connection projects in Hunan Province (hereinafter referred to as “the Projects”), this Plan is formulated in accordance with the National Development and Reform Commission and the National Energy Administration’s Notice on Matters Concerning the Orderly Promotion of Green Electricity Direct Connection (NDRC Energy [2025] No. 650) and the Notice on Improving Price Mechanisms to Facilitate Local Consumption of New Energy Power Generation (NDRC Price [2025] No. 1192), taking into account the actual conditions of our province.
Article 2 [Project Definition] A project refers to a model in which new energy sources such as wind power, solar power, and biomass power do not connect directly to the public grid, but instead supply green electricity via a dedicated transmission line to a single power user, thereby enabling clear physical traceability of the supplied electricity. Among these, a direct-connection line refers to a dedicated power line that connects the power supply directly to the electricity user. Based on whether the load is connected to the public grid, they are classified into grid-connected and off-grid types. Grid-connected projects are integrated into the public grid as a whole, establishing clear physical and responsibility interfaces with the grid. The power source shall be connected on the customer side at the demarcation point between the customer’s and the public grid’s ownership. Off-grid projects have no physical connection to the public power grid; the power source is directly connected to the user’s electrical equipment. For distributed PV systems that are directly connected to the power grid, the relevant national policies, including the “Administrative Measures for the Development and Construction of Distributed Photovoltaic Power Generation,” shall apply. Multiple renewable energy projects are permitted to supply green electricity directly to a single power user via direct-to-consumer green power contracts. Green-power direct-connection projects within industrial parks (including those involving incremental distribution networks) involve the direct supply of green electricity to multiple end-users via dedicated transmission lines. Such projects are not subject to the provisions of this plan and will be regulated separately upon the issuance of specific policies by the National Development and Reform Commission and the National Energy Administration.
Article 3 [Basic Principles] Projects shall be planned and operated in accordance with the principles of safety first, environmental sustainability, balanced rights and responsibilities, and source-load matching, and shall fairly and reasonably assume safety, economic, and social responsibilities.
Article 4 [Applicable Types] In green power direct-connection projects, the load and power generation facilities may be located in different administrative districts, but they must reside within the same power supply service area. The applicable types are as follows. Enterprises with new electricity demand may develop this project as a complementary initiative. Newly added electricity demand includes the load from projects that have obtained the requisite approval (filing) documents but have not yet been completed and put into operation. Among existing load entities that operate their own coal- or gas-fired captive power plants, those that have fully paid the Renewable Energy Development Fund may develop this project and achieve clean energy substitution by reducing the output of their captive power plants. Among the existing power load, export-oriented enterprises with stringent carbon-reduction requirements and computing-power-intensive businesses (including data centers) can directly connect to nearby renewable energy sources to procure green electricity. Among them, extroverted enterprises shall provide the Customs Registration Form for Declaration Units, proof of stringent carbon-reduction requirements, and other relevant supporting documents. Among the non-operational new energy power sources, projects that have not yet commenced grid-connection construction or are unable to connect to the grid due to constraints on power consumption capacity may, after consultation with eligible electricity-consuming entities, be jointly converted into direct green-power supply projects. New energy power sources that are not yet in operation, for which the grid connection projects have been explicitly designated to be invested in and constructed by the grid enterprise, as well as those that are already in operation and whose grid connection projects were likewise funded and built (including buyback arrangements) by the grid enterprise, shall not be converted into green electricity direct-connection project resources. Other newly commissioned new energy power sources, after consultation with eligible electricity load entities, may jointly be converted into green electricity direct-connection project resources. Article 5 [Source-Load Matching Requirements] Grid-connected projects shall, in accordance with the “load-driven generation” principle, scientifically determine the types of new energy power sources and their installed capacity. The scale of electricity demand must be based on sound evidence and supported by reliable data. The project may participate in the spot market primarily through self-generation and self-consumption, with surplus power being fed into the grid as a supplementary arrangement. The annual grid-connected electricity output shall not exceed 20% of the total available generation capacity. The project’s overall annual renewable energy consumption should account for no less than 60% of the total available generation capacity and no less than 30% of the project’s total electricity consumption, with a commitment to continuously increase its self-consumption ratio to at least 35% by 2030.
Chapter 2 Project Approval
Article 6 [Application Procedures and Applicant] Projects shall be led by the load-serving entity for submission. The municipal energy authority shall conduct a preliminary review. Once the preliminary review is approved, the municipal energy authority shall submit a formal document to the provincial energy authority for review and approval. The project may be implemented only after it has been reviewed and approved by the provincial energy authority.
Article 7 [Requirements for Application Materials] When submitting a project application, applicants shall complete the Project Application Form (Attachment 1) and concurrently submit the Comprehensive Project Construction Plan (Attachment 2). In the integrated solution, the declared power exchange value between the project and the public grid, as well as the project’s maximum peak-to-valley difference ratio, shall not exceed the project’s maximum load power and its peak-to-valley difference ratio, respectively. Direct-connection power projects shall be included in the annual development and construction plans formulated by the provincial energy authorities. Direct-connection transmission lines should minimize crossings and spans over other lines; where such crossings are unavoidable, appropriate safety measures must be implemented. In principle, they should pass beneath public transmission lines of the same voltage level or higher.
Article 8 [Document Review Requirements] The load, power supply sources, direct-connection lines, and grid-connection lines included in a project shall, in accordance with the requirements of the Hunan Province Measures for the Approval and Filing Management of Enterprise Investment Projects, obtain approval or filing documents separately.
In principle, the grid connection voltage level for projects shall not exceed 220 kV. Where connection at the 220 kV voltage level is demonstrably necessary, the provincial energy authority, in collaboration with the Hunan Supervisory Office of the National Energy Administration, shall jointly organize a special assessment of power system security risks. Connection may proceed only after it has been confirmed that the safe and stable operation of the power grid will be ensured.
Article 9 [Project Modifications] The project investment entity shall carry out construction in accordance with the approved comments and may not unilaterally modify the project’s scope of work. After a project has been approved, if there is a change in the project’s load or the legal entity serving as the power-source investment entity, or if there are significant changes to the project’s construction site, scale, or scope, the project’s investment entity shall promptly notify the provincial energy authority and obtain re-approval. Based on the standard construction timeline for projects, provincial energy authorities shall conduct regular inspections and promptly remove from the pipeline any projects that do not meet the conditions for commencement. Article 10 [Planning Coordination] For projects that have passed review, the direct-connection lines and grid-connection systems included in their integrated plans shall be incorporated into the provincial or municipal energy, power, and territorial spatial planning, categorized by voltage level.
Article 11 [Registration and Filing] The provincial-level energy authorities shall, by leveraging the National Information Management Platform for Renewable Energy Power Generation Projects, organize and carry out the registration and filing of power sources within such projects. The project investor shall complete the registration and filing within one month after the project is completed and connected to the grid, with the relevant information submitted by the power grid enterprise.
Chapter III Development and Construction
Article 12 [Investment Entities and Investment Methods] All types of business entities, including private enterprises (excluding grid enterprises), may invest in green power direct-connection projects. The project’s power supply may be financed by the load entity, by the power generation company, or by a joint venture established between the two parties. In principle, the dedicated transmission line should be funded by the load entity and the power source entity.
Article 13 [Project Site Selection] The project investor shall properly carry out site-selection work. The construction site must be lawful and compliant, with all necessary procedures completed and clear property rights. Article 14 [Agreement Execution] Where the power source and the load of a project are owned by different investors, a multi-year power purchase agreement or an energy performance contracting agreement shall be entered into. In addition, a separate agreement shall be executed to govern matters such as power facility construction, ownership delineation, operation and maintenance, dispatch and grid integration, settlement arrangements, and liability for breach of contract.
Article 15 [Safety Requirements for Construction] Project construction shall strictly comply with relevant management regulations and standards pertaining to equipment, construction projects, and work safety, so as to ensure the quality and safety of the project and to properly carry out acceptance procedures. Entities engaged in project design, construction, installation, commissioning, and other related activities shall meet the applicable qualification requirements.
Article 16 [Management of the Construction Process] The municipal energy authority where the project is located shall regularly monitor and coordinate the project’s construction progress, strengthen full-process supervision of the project, and submit monthly reports on project progress to the provincial energy authority.
Chapter IV Grid Connection
Article 17 [General Requirements for Connection] Power grid enterprises shall formulate and publicly disclose work procedures and technical standards and specifications for project grid connection, reasonably optimize or streamline the workflow, provide one-stop service, fulfill their responsibilities for connection services, and enhance the quality of such services. The acceptance and response procedures, as well as the time limits and requirements, for project grid-connection applications and system integration design submissions shall comply with the provisions of the “Regulations on Fair and Open Access to the Power Grid” (Guoneng Fa Jian Guan Gui [2021] No. 49). Article 18 [Requirements for Grid Connection Application Documents] Projects shall comply with relevant planning and policy provisions and shall submit to the grid enterprise a letter of intent for grid connection, the approval opinion issued by the provincial energy authority, as well as supporting documents pertaining to the project’s loads and power sources, approval or filing documents for user-invested direct-connection and grid-connection lines, and proof of ownership of the locations of the power sources and loads, among other relevant materials (see Appendix 1 for details). Article 19 [Grid Connection System Design] The project investor shall engage a qualified design firm to undertake the grid connection system design. On the basis of ensuring the safe and reliable operation of the power grid, the design shall comprehensively take into account construction conditions, the grid connection point, and other relevant factors, and shall reasonably select an appropriate grid connection system design方案 in light of the actual circumstances. Power grid enterprises shall, in accordance with relevant industry standards and the requirements of the grid connection system design, promptly provide, in a single submission, the necessary foundational data for conducting the grid connection system design, including the current status of the power grid, grid development plans, and grid connection conditions. If timely provision is indeed not possible, the power grid enterprise shall notify the project investor in writing and state the reasons therefor. All parties shall, in accordance with national information security and confidentiality requirements, standardize the provision and use of relevant materials. Projects implemented in phases shall not add any new connection points to the public grid. Article 20 [Investment Boundary] The portion of the public grid upgrade required for project connection, as well as bi-directional metering devices installed at metering points for on-site power generation, plant auxiliary power, self-consumption, and energy storage, shall be funded and constructed by the grid enterprise. The investment boundary for the grid-connection system project when a new project is connected to the public grid shall be determined in accordance with the grid-connection requirements for the electricity load. When eligible commissioned new energy projects are converted into green power direct-connection projects, the grid enterprise will no longer repurchase the original new energy project’s grid-connection infrastructure. Article 21 [Contract Execution] The project investor shall, prior to the commencement of commercial operation of the project, separately enter into a Power Purchase Agreement and a Grid Connection and Dispatching Agreement with the power grid enterprise and its dispatching authority, respectively. The responsibilities and costs for power supply beyond the project’s grid-connected capacity shall be separately negotiated and agreed upon by the project investor and the grid enterprise, with a corresponding agreement to be executed. Grid enterprises shall fulfill their power supply obligations in accordance with the grid-connection capacity declared by the project investor and the relevant agreements signed with it. The project investor shall ensure that the power exchange between the project and the public grid does not exceed the declared grid-connection capacity and shall bear sole responsibility for any power supply interruptions caused by its own reasons. In this project, new energy generation projects are exempt from obtaining a power business license (generation type), unless otherwise provided by national or provincial regulations. Article 22 [Completion Acceptance] The project shall be constructed within the scope of the integrated plan. The project’s investment entity shall equip the secondary system with relay protection, security and stability control devices, communication equipment, and other components in accordance with applicable standards. The grid-connection performance of the project as a whole and of all its internal facilities must comply with relevant national and industry technical standards and specifications, and shall be tested and certified by a nationally accredited testing and certification body. Once the project has passed such testing and certification, the power grid enterprise may not require any further re-testing. All business systems within the project shall strictly comply with the “Regulations on Security Protection for Power Monitoring Systems” and install network security monitoring and isolation devices, among other network security infrastructure.After the project is completed, the power grid enterprise shall, in accordance with relevant regulations, verify the configuration of the project’s internal bi-directional metering devices and the test reports for major equipment, and conduct grid-connection inspections according to the applicable standards. It is strictly prohibited for the project’s investment entity to bypass the installed electricity metering devices and draw power directly. After the project passes inspection, it shall be connected to the grid and put into operation. The project shall promptly organize completion acceptance and submit the completion acceptance report to the provincial energy authority and the Hunan Energy Regulatory Office.
Chapter V Project Operation
Article 23 [Principal Responsibility for Safety] The project investor shall be the principal entity responsible for work safety throughout the project. It must implement and comply with national and industry regulations on work safety management, and strengthen work safety management in accordance with the law across all stages of project construction and operation. Article 24 [Project Operation and Maintenance Requirements] The project investor may either undertake operation and maintenance responsibilities directly or entrust a specialized O&M company or other third-party entity to serve as the O&M management entity. All such entities shall strictly comply with relevant regulations governing dispatch operations, network security, and data security, promptly implement risk management and hazard identification and remediation, conduct thorough assessments of internal equipment failures and various security risks, and take timely measures to eliminate them, thereby continuously enhancing system reliability. Article 25 [Dispatch Operations] The project as a whole and its internal power sources shall be subject to the management of the relevant dispatching authorities in accordance with their connection voltage levels and capacity scales. They shall be integrated into the new-type power load management system or the power dispatch automation system based on the type of services they provide to the grid. Except in the event of emergencies that compromise the safe and stable operation of the public power system, the dispatching agencies under the grid enterprises shall issue dispatch schedules based on the generation and consumption profiles independently scheduled by the project entities. Project investors meeting the relevant criteria are encouraged to increase investment in project upgrades and renovations to enhance system interoperability, thereby refraining from drawing power from the public grid during periods when orderly electricity use measures are in effect. The project’s investment entity shall ensure that the project is capable of receiving and executing remote control commands from the dispatching authority. It is prohibited to, without the dispatching authority’s consent, independently adjust the power exchange between the project and the public grid via external control interfaces. It is also prohibited to shut down the project or modify its grid-connection parameters without authorization. During periods when it is difficult to accommodate new energy generation, the project shall not feed power back into the public grid. The project investor shall effectively manage reactive power and power quality, ensuring that the power quality at the point of connection to the public grid meets the relevant national technical standards. In addition, it shall submit the required documentation to the grid enterprise and its dispatching authority in accordance with the Grid Operation Code and other applicable regulations, and shall cooperate with the grid enterprise and its dispatching authority in receiving technical supervision covering grid-connection characteristics, cybersecurity, power quality, and other related aspects. Article 26 [Market Trading] Grid-connected projects shall enjoy equal market status, register in accordance with the Basic Rules for Electricity Market Registration, and, in principle, participate in electricity market transactions as a whole. Settlement shall be based on the net power exchange with the public grid. The new energy generation volume of this project shall not be subject to the renewable energy sustainable development pricing settlement mechanism. When the project consumes electricity, it must participate directly in market transactions and may not have its power procurement handled by the grid enterprise. Furthermore, it shall bear the transmission-line losses associated with the grid connection based on its off-grid electricity consumption. Where the power supply and load entities of a project are not under the same investment entity, they may register separately and participate in electricity market transactions in an aggregated capacity. The volume of electricity traded between the two parties and the volume of electricity dispatched to the grid shall be governed by the relevant regulations on green certificates and green power trading. Article 27 [Requirements for Fee Payment] In accordance with the principle of “the beneficiary bears the cost,” green electricity direct-connection projects shall, pursuant to relevant regulations, pay transmission and distribution charges, system operation costs, policy-based cross-subsidies, government-managed funds, and associated surcharges. Local authorities shall not, in violation of state regulations, reduce or exempt any related fees.
(I) Transmission and distribution fees. Under this project, transmission and distribution charges are billed based on capacity (or demand). For electricity delivered to the distribution network, no system reserve charges or energy-based transmission and distribution tariffs shall be levied. The monthly capacity (demand) electricity charge is calculated as follows: capacity (demand) electricity charge = capacity (demand) electricity charge paid according to the current policy + current electricity price standard for the voltage level × average load rate × 730 hours × access to the public grid capacity. Among these, the average load factor shall, for the time being, be based on the provincial average for 110 kV and above commercial and industrial two-part tariff customers. It will be calculated by the grid enterprise, reviewed by the provincial pricing authority, and then publicly announced. The capacity to be connected to the public grid shall be the sum of the capacities of all distribution transformers in service at the project site and the capacities of high-voltage motors that are directly connected to the grid without passing through a transformer. For projects with high reliability requirements that are mandated to maintain capacity reserves, they may continue to pay transmission and distribution charges under the current two-part tariff structure. Under this arrangement, the demand (or capacity) charge will be calculated in accordance with existing policies, while the energy charge will be based on actual electricity consumption (including self-generated and self-used electricity) and the applicable energy tariff rate for the relevant voltage level.
(II) System operation costs. When a project draws power from the public grid, it is treated as a commercial or industrial user. For the time being, the system operation fee shall be levied based on the amount of electricity imported from the grid. In accordance with relevant national regulations, the fee collection method will be gradually transitioned to one based on contracted capacity or other applicable criteria.
(III) Policy-based cross-subsidization. Temporarily exempt the newly incurred gains or losses from policy-based cross-subsidies on self-generated and self-consumed electricity.
(IV) Government funds and surcharges. To be implemented in accordance with the relevant regulations of the fiscal authorities under the State Council. Article 28 [Requirements for Settlement of Electricity Charges for Grid-Connected Power] For grid-connected green power direct-connection projects, the project’s point of interconnection shall serve as the metering and settlement reference point, and the project shall settle electricity charges with the public grid as a single entity. The project’s grid-connected electricity output shall participate in power market transactions in its entirety, contribute to price formation in the market, and reflect supply-demand dynamics. Article 29 [Statistical Requirements] State Grid Hunan Electric Power Co., Ltd. shall include, in the statistical reporting system for Hunan Province’s power industry, itemized data on end-user electricity consumption, internal power generation, plant-use power, total electricity consumption, and energy storage charge/discharge volumes. Total electricity consumption refers to the entire amount of electricity consumed by all users (including those engaged in power generation), encompassing the electricity used by project-owned electrical equipment, losses in generating units, and (where applicable) losses in energy storage systems. Total power generation shall be defined as the metered output at the point of interconnection for all generating units, with inclusion in the statistical scope determined according to the respective power source types. The project investor, local grid enterprises, and all incremental distribution network operators shall cooperate effectively.
Chapter VI Exit Mechanism
Article 30 [Exit Scenarios and Procedures] In principle, green power direct-connection projects shall not be withdrawn within three years of commissioning. If, three years after the project has been put into operation, substantial changes in project load render it unsustainable, or if the project investor decides to abandon the project, the investor shall submit a written withdrawal application to the provincial energy authority. Upon approval, the investor shall be permitted to withdraw from the project. When a project where the power supply and load are owned by different investors applies to withdraw, the request shall be initiated jointly by both parties.
Article 31 [Seamless Transition of Grid Connection Services Following Withdrawal] Power generation or load facilities that have been approved to withdraw from a project shall re-apply for grid connection procedures. Investment entities of existing power generation or load projects shall submit a grid connection modification application to the grid enterprise and complete the relevant procedures. Investment entities of incremental power supply or load projects shall resubmit grid connection applications to the grid enterprise, which shall prioritize the provision of grid connection services. Article 32 [Market Integration Following Withdrawal] Power generation and load projects that have been approved for withdrawal shall enter the electricity market for trading. Among these, the power generation projects may, in accordance with policy requirements, participate in the competitive bidding for capacity under Hunan Province’s subsequent mechanisms.
Chapter VII Evaluation Mechanism
Article 33 [Evaluation Organization] The provincial energy authority shall, each December, organize the municipal energy authorities to conduct project evaluations. The project investors, grid enterprises and their affiliated dispatching institutions, and the Hunan Electricity Trading Center shall cooperate and submit suggestions for optimization and improvement.
Article 34 [Assessment Content] Project assessments shall include, but not be limited to, the following:
The municipal energy authority shall assess the project’s implementation results and economic benefits, among other factors.
Investment entities shall conduct evaluations of their own project development and construction processes. Grid enterprises and their affiliated dispatching institutions shall provide data on project operation and on the self-consumption of new energy generation within the project. They shall also conduct assessments regarding project grid-connection procedures, investment and construction of grid-connection infrastructure, management of grid-connection characteristics, and power quality. The Hunan Electricity Trading Center shall cooperate in providing information on the project’s participation in electricity market transactions and conduct assessments regarding the market registration of the project’s investment entity, the compatibility of the project with market trading rules, and other relevant matters.Chapter VIII Supplementary Provisions
Article 35 [Authority to Interpret] This Plan shall be interpreted by the Hunan Provincial Development and Reform Commission. Article 36 [Effectiveness] This Plan shall come into force on the date of its promulgation. Any issues arising during its implementation should be promptly reported by all relevant entities to the provincial energy authorities. During the period of implementation, if the State adopts other provisions, such provisions shall prevail.
annex 2
integrated construction scheme of green power direct connection project
(outline)
1. design principles, design scope and design basis
(I) design principles
including but not limited to the following documents, the following documents are essential for the application of this document. For any referenced documents that bear a date, only the edition bearing that date shall apply to this document. For any referenced documents without a date indicated, the latest edition (including all amendments) shall apply to this document.
(1) Guidelines for Power System Security and Stability
(2) Calculation Standards for Power System Security and Stability
(3) Technical Code for Power System Design
(4) Technical Guidelines for Power Systems
(5) Technical Guidelines on Voltage and Reactive Power in Power Systems
(6) Technical Guidelines on Reactive Power Compensation Configuration in Power Systems by State Grid Corporation of China
(7) Technical Regulations for Wind Farm Connection to the Power System
(8) Technical Regulations for Wind Farm Grid Connection by State Grid Corporation of China
(9) Technical Regulations for Photovoltaic Power Station Connection to the Power System
(II) Scope of Design and Design Basis
The project design scope covers all key aspects related to this project, including construction content, implementation conditions, construction sequence, and other relevant details. The project design basis shall include the following:
a) the basis for explaining the work tasks, the approved or submitted preliminary work review documents or guidance documents; B) other important documents related to the project.
(III) Design Reference Year
The project's design reference year should be selected by comprehensively considering factors such as the project's commissioning sequence and the surrounding power grid conditions. Based on the actual situation, a specific year 1 to 5 years after the design reference year should be chosen for verification analysis.
2. Project Overview and Necessity of Construction
(I) Project Overview
The project overview should be introduced from aspects such as the project name, project type, investing entity, construction site, construction scale, and the situation of the surrounding power system.
(II) Necessity of Construction
The necessity of project construction should be analyzed by comprehensively considering factors such as project economics, green power demand, and environmental conditions.
3. Main Project Construction Contents
(I) Power Supply Construction Contents
Introduce the power supply type and geographical location. Construction conditions, the final planned capacity and the phased construction capacities, inclusion in energy development plans at all levels, preliminary project status, and the planned commissioning date, among other factors. This section introduces the main characteristics of the power supply, including local resource conditions, plant-specific features, annual generating capacity utilization hours, monthly renewable energy output profiles, a typical daily output profile, annual electricity generation, total static investment, and investment per kilowatt. Existing power generation projects that have been completed and put into operation and are directly connected to the public grid shall also provide information on the ownership status (including buyback arrangements) of the grid-connection facilities.
(II) load construction content (new load)/load overview (stock load) introduces the basic situation of load projects, including load project type, main production content, construction location, final construction scale and current construction scale; Introduce the power consumption characteristics of the project, including the maximum power consumption load, monthly power consumption curve, typical daily power consumption curve, annual power consumption, etc.
(III) Content of Energy Storage Construction (Optional)
Introduce the type, capacity, and construction location of the energy storage power station, etc.
(IV) Grid Construction Content
From the perspectives of power supply, load, energy storage, and the project as a whole, introduce the connection voltage level, connection point, and connection system scheme; also introduce the declared value of the exchange power between the project and the public grid, as well as the project's maximum peak-to-valley difference rate, etc.
(V) Source-Load-Storage Matching Analysis
It introduces the boundary conditions and relevant rules for the project's power supply-demand balance, selects the design reference year and the planning reference year to conduct a month-by-month power supply-demand balance analysis, and analyzes the project's renewable energy utilization rate, the proportion of renewable energy consumed in the total load electricity consumption, and its ratio to the electricity fed into the grid.
(VI) Regulation and Control Platform Construction Plan
Introduces the project-related dispatching system and the construction content of the dispatching data network; introduces internal resource scheduling information interaction, equipment configuration methods, functions, and information transmission within the project.
(VII) Grid Connection Scheme
Describe the surrounding power grid conditions prior to the project's commissioning. Based on the project's short- and long-term construction plans and the results of the power balance analysis, combined with the current status and development of the power grid infrastructure and load distribution, elaborate on the rationale for developing the scheme and the preliminarily proposed grid connection voltage level. Conduct a preliminary analysis of the construction conditions, expansion conditions, and preliminary corridor conditions for the proposed connection point. Propose comparative grid connection schemes and any necessary transitional solutions, and outline the planning and design aspects related to relay protection, automatic safety devices, automation systems, and communication networks. The grid-connection scheme shall clearly specify the technical requirements for metering devices, communication interfaces, communication protocols, and online power quality monitoring devices. Among them, two-way metering device installation points conforming to relevant standards and approved by relevant departments shall be installed at the internal power generation, auxiliary power consumption, self-use, energy storage and other gates of the project. All kinds of resources with the voltage level of the internal connection point below 10kV shall at least support RS485 communication interface, and network port communication interface can be added when conditions permit; In terms of communication protocol, at least DL/T 698.45 communication protocol shall be supported, ensure that it is observable, measurable, adjustable, and controllable; the project should be equipped with power quality online monitoring devices at the connection point with the public grid.
4. Project Implementation Conditions
From the perspectives of clarifying load types, investment entities, and ownership of construction site properties, clearly define the implementation conditions for the project's power supply, power grid, load, and energy storage (if any). Provide certification that the project site is not subject to environmental sensitivity factors.
5. Electrical Calculation
(I) Power Flow Calculation and Analysis
Based on the calculation conditions such as the calculation reference year, load level, power supply, network structure, power flow mode, power factor, and voltage control range, provide the project's power flow analysis and results of power flow calculation, including power flow direction and voltage level, to determine whether the project can meet the electricity demand.
(II) Stability Calculation and Analysis
Based on calculation conditions such as the calculation reference year, calculation operating modes, fault conditions, protection operation status, and generator unit mathematical models, the project's stability calculation and analysis results are presented to verify the power grid's stability level under typical operating modes.
(III) Short-circuit Current Calculation and Analysis
Based on reasonably selected calculation conditions such as calculation tools, calculation models, and calculation boundaries, the short-circuit current calculation and analysis results for the project are presented, along with corresponding measures.
6. Investment Estimation and Financial Analysis
Conduct investment estimation and financial evaluation for power sources, power grids, loads, and energy storage (if any), taking into account factors such as the nature of the project, equipment models, and project scale.
7. Economic and Social Benefits
(I) Economic Benefits
The project's economic benefits are analyzed using methods such as the internal rate of return method, net present value method, annual cost method, and payback period method.
(II) Social Benefits
The project's social benefits are analyzed from multiple dimensions, including green and low-carbon development, energy equity, and economic employment.
8. Conclusion
Summarize the project's main conclusions and recommendations, which should include: the project's current and long-term construction content, the access system plan, and the scale of investment, etc.
9. Appendix
(I) Business registration information of the project construction unit for green power direct connection, information of the legal representative, unified social credit code, business license, credit certificate, etc.
(II) The power supply company’s supportive opinion on the project’s grid connection.
(III) Other supporting documents.
(IV) If the project's power source and load are not under the same investing entity, they shall provide a multi-year power purchase agreement or contract energy management agreement signed between the load and the power source, as well as agreements on matters such as power facility construction, property rights demarcation, operation and maintenance, dispatching and operation, settlement relationships, and liability for breach of contract.