Control strategy for cooperation between traditional unit and energy storage system in agc system

Abstract

The invention discloses a strategy for controlling matching of a traditional unit and an energy storage system in an AGC system. The strategy comprises the following steps: obtaining the frequency deviation and the call wire switching power deviation from a data acquisition and supervisory control system, and computing area control deviation; computing system adjustment required power according to the area control deviation; distributing the system adjustment required power to the traditional unit, and computing target output of the traditional unit; computing the largest adjustment capability of the traditional unit in the current AGC period; distributing remaining adjustment power to the energy storage system to be borne; checking and issuing a command, and finishing the current AGC period. The strategy is beneficial to rapidly restraining fluctuation of the frequency of an electric system and fluctuation of the call wire switching power, and can reduce the requirement of the electric system for the frequency modulation capacity, or improve the frequency modulation control effect under the situation that the frequency modulation capacity is changeless. The achieved method is simple, the operation amount is barely added, meanwhile, the requirement for the hardware environment of a control system is low, and larger changes for an existing AGC system is not required.

Description

technical field [0001] The invention belongs to the field of automatic generation control (Automatic Generation Control, AGC) of electric power system, and relates to a control strategy for the cooperation of a traditional unit and an energy storage system in an AGC system. Background technique [0002] The frequency of the power system is an important indicator of power quality. In order to maintain the safe and stable operation of the system and protect the power equipment, the system frequency needs to be maintained within a relatively stable range. my country's national standard GB / T15945-2008 stipulates that the allowable range of frequency deviation of large-scale power systems is within 4‰ of the frequency rating. As an important auxiliary service of the power system, frequency regulation is to mobilize the output of the unit to follow the short-term change of the load in time and ensure the frequency stability of the system. [0003] In recent years, under the backg...

AI Technical Summary

Problems solved by technology

From the investigation of the current domestic AGC control strategy, there is no application of a control strategy in which the energy storage system and the traditional unit cooperate to participate in frequency regulation.

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