A utility evaluation method for energy storage system to meet frequency regulation demand of high wind power penetration rate system

Abstract

The invention discloses a method for assessing the effectiveness of an energy storage system in response to the frequency adjustment demand of a high-wind power permeability system. The method is characterized in that the proportionality coefficient KP of the energy storage system in participation in frequency adjustment is selected through an analytic hierarchy process according to established indexes for evaluating the energy storage system in response to the frequency adjustment demand of the high-wind power permeability electric system, an auxiliary service pricing mechanism for energy storage power stations of different types in participation in frequency adjustment of the electric system is studied and established by comprehensibly considering benefit factors such as the energy storage system party and the power grid party, and the wind power receptivity of existing power grids and system operating safety are improved. The method has the advantages of being scientific, high in applicability, good in effect and the like.

Description

technical field [0001] The invention relates to the technical field of wind power generation, and relates to a method for evaluating the utility of an energy storage system for responding to the frequency regulation demand of a system with a high wind power penetration rate. Background technique [0002] In today's world, energy consumption is increasing day by day, and the problem of environmental pollution is becoming more and more prominent, restricting the sustainable development of the world economy and society. As the most potential non-hydro renewable energy at present, wind energy has the good characteristics of safety, reliability and pollution-free compared with traditional fossil energy, and has gradually developed into a new leading energy. In 2015, my country ranked first in the world with a cumulative installed capacity of 148GW. The country's new wind power grid-connected capacity was 32.97GW, and the cumulative grid-connected capacity was 146.26GW. According...

AI Technical Summary

Problems solved by technology

In view of the power system frequency regulation problems brought about by large-scale wind power access, traditional frequency regulation units are difficult to meet the future power system frequency regulation needs due to the gradual decline in the proportion and the limitations and insufficiencies of frequency regulation performance.

[0003] Thermal power units have inherent deficiencies in frequency regulation: slow response, cannot accurately track automatic generation control (AGC) commands, and sometimes even cause reverse adjustments to regional control errors

However, due to the high investment cost of the energy storage system, the configuration capacity of the energy storage system is greatly limited, and a reasonable energy storage capacity configuration is very important to meet the frequency regulation requirements of the power grid

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