Composite energy storage system and method for renewable energy consumption and power grid peak and frequency modulation

Abstract

The invention discloses a composite energy storage system and method for renewable energy consumption and power grid peak and frequency modulation, and the system comprises a power grid dispatching device which is connected with a power grid; an electrolytic hydrogen production station connected with the power grid and the power grid dispatching device; an energy storage power station connected with the electrolytic hydrogen production station, the power grid dispatching device and the power grid; and a hydrogen storage station. The composite energy storage method comprises the steps that the power grid dispatching device receives an electrolytic hydrogen production load curve, a peak regulation and frequency modulation instruction and a short-term rapid small-amplitude power adjustment signal; the electrolytic hydrogen production station operates according to the electrolytic hydrogen production load curve; and the energy storage power station carries out rapid charging and discharging adjustment on the electrolytic hydrogen production station according to the peak regulation and frequency modulation instruction and the power adjustment signal. According to the composite energy storage system for renewable energy consumption and power grid peak regulation and frequency modulation, by adopting the mode of combining hydrogen energy storage, electrochemical energy storage and super capacitor or flywheel energy storage, large-scale consumption of renewable energy is achieved, and the peak regulation and frequency modulation capacity of the power grid is remarkably enhanced.

Description

technical field [0001] The invention relates to an electric energy storage system, in particular to a composite energy storage system and method for renewable energy consumption and power grid peak regulation and frequency regulation. Background technique [0002] Under the requirements of my country's energy transformation and the realization of carbon neutrality goals, renewable energy such as wind power and photovoltaics will continue to develop on a large scale. This will make the contradiction between my country's renewable energy-rich areas and the load center areas increasingly prominent, the problem of large-scale renewable energy consumption will become increasingly prominent, and the power grid will face increasing pressure on peak regulation and frequency regulation. In addition, when my country's power system transforms to rely mainly on renewable energy power generation, the occurrence of low-probability and high-risk "black swan" events will pose severe challen...

AI Technical Summary

Problems solved by technology

Electrochemical energy storage and flywheel energy storage have strong dynamic response capabilities, which are suitable for rapid frequency modulation and small-range peak regulation, and are less competitive in large-scale peak regulation.

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