Fire storage system and energy storage system AGC frequency modulation method and device

Abstract

The invention provides a fire storage system and an energy storage system AGC frequency modulation method and device. The method comprises steps that when the fire storage system is in an automatic power generation control AGC frequency modulation mode, firstly, a frequency modulation power command and a state of charge SOC of an energy storage system in the fire storage system are obtained; secondly, according to the FM power command and the SOC, the state relationship between the FM power command and the SOC is determined; thirdly, according to the state relationship, the corresponding frequency modulation strategy is formulated; the frequency modulation strategy includes repair strategy, the repair strategy is as follows, when the state relationship is out of the intervention control scope and the FM power command is within the positive dead scope, the energy storage system is controlled for performing forward operation till the SOC transforms to a corresponding near limit value ofthe ideal scope; the SOC of the energy storage system is made to tend to an ideal scope, SOC deviation of the energy storage system is avoided, moreover, the frequency modulation algorithm of the energy storage system is guaranteed to be effective, that is, the energy storage system effectively assists a thermal power unit to complete an AGC frequency modulation task, and AGC FM performance is improved.

Description

technical field [0001] The invention belongs to the technical field of power batteries, and more specifically relates to a fire storage system and an AGC frequency modulation method and device for the energy storage system thereof. Background technique [0002] In my country's major regional power grids, hydropower and thermal power are the most important frequency modulation resources, and thermal power is widely distributed because of its low dependence on natural resources such as geography and seasons. At present, the thermal power unit affects the change of the system frequency by adjusting the output of the unit. Thermal power units cannot accurately track AGC (Automatic Generation Control, automatic generation control) commands due to their inherent shortcomings in performance, such as slow climbing speed of thermal power units, overshoot in the power regulation process of thermal power units, and low output accuracy. Therefore, when the thermal power unit provides A...

AI Technical Summary

Problems solved by technology

However, in the prior art, in the process of participating in AGC frequency regulation of thermal power units, if the SOC (State Of Charge, state of charge) of the energy storage system deviates, it will cause the frequency regulation algorithm of the energy storage system to fail, thereby affecting the performance of AGC frequency regulation

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