New energy distribution and storage standards have arrived

Recently, the "Technical Guidelines for the Planning of New Energy Storage for Cross provincial Power Transmission Configuration in New Energy Bases" (draft for soliciting opinions) led by the National Energy Administration (hereinafter referred to as the "draft for soliciting opinions") was released to the public. This is the first planning and technical guidelines issued at the national level to guide the scale of new energy storage configuration.
The guidelines will be used to guide the planning of new energy storage for cross provincial power transmission configuration in new energy bases, clarifying corresponding technical principles. The main technical content includes: terminology and general principles, configuration capacity analysis, planning and site selection, technology selection, layout and access system, secondary power system, technical and economic analysis, etc.
The formulation and release of this guideline is conducive to the formation of more scientific and evidence-based plans for the allocation and storage of new energy in China from the perspective of actual system needs in the future.
The key points are as follows:
The new energy base's power transmission configuration is mainly used for peak shaving and improving the stability of the base's power transmission. According to the needs of scheduling operation, it can be considered for functions such as frequency regulation of the system and emergency backup.
The new energy storage power station with power transmission configuration in the new energy base should be mainly arranged at the transmission channel transmission end. If the receiving power grid meets the conditions, the energy storage configuration at the sending end can be further optimized.
According to different layouts and functions, it can be divided into centralized arrangement of new energy storage power stations and decentralized arrangement of new energy storage power stations.
A new type of energy storage power station with dispersed layout can be considered to be arranged in new energy stations or new energy gathering stations. The main function is to suppress fluctuations in new energy output and reduce new energy waste. The decentralized layout of new energy storage power stations should meet the requirements of the new energy base's external transmission curve.
The centralized layout of new energy storage power stations is mainly configured in hub substations or external transmission channel converter stations.
The scale of new energy storage for power transmission in new energy bases should be calculated and analyzed based on the comprehensive consideration of the peak shaving capacity of supporting power sources and other regulatory measures, and constrained by the technical indicators such as the proportion of renewable energy electricity and the utilization rate of new energy proposed by the country for external transmission channels.
In production simulation calculations, the supporting power supply or regulating power supply for the channel should be considered based on the design value, and the supporting coal-fired power should not exceed 30% of the rated power in principle; In principle, there is no limit on the output of small technologies for supporting gas and electricity; Supporting hydropower needs to coordinate and determine the small technical output of hydropower based on the output characteristics of hydropower during high and low seasons; In principle, pumped storage has no small technical output limit and can achieve a peak shaving capacity of 200%.
The economic comparison of new energy storage schemes should be based on the optimization of technical schemes. The economic comparison of schemes should comprehensively consider the economy of the supporting power supply, energy storage, collection, and external transmission lines of the power transmission channel. The economic evaluation of the new energy storage planning scheme should be comprehensively evaluated, and the economic analysis and effectiveness evaluation of each alternative scheme should be conducted to provide a basis for the optimization and investment decision-making of the power transmission scheme in the new energy base.
Financial analysis should be based on investment return requirements and reasonably assumed depreciation rates, loan interest, and other calculation parameters. Internal rate of return method, investment payback period method, and other financial evaluation indicators should be used to calculate internal rate of return, investment payback period, and other financial evaluation indicators. It is also advisable to combine factors such as resource endowment, energy storage technology, and market environment of the new energy base to calculate the comprehensive electricity price of the recommended plan for the new energy base's power transmission supporting power supply and new energy storage, And compare and analyze with the receiving end electricity price based on the electricity transmission and transformation markup. If necessary, sensitivity analysis should also be conducted on some influential factors.
The original text is as follows:
The original text of the "Technical Guidelines for the Planning of New Energy Storage in Cross provincial Power Transmission Configuration of New Energy Bases" (draft for soliciting opinions) is as follows: