Coordinated control method for fast and slow frequency modulation resources considering energy storage system SOC

Abstract

The invention discloses a coordinated control method for fast and slow frequency modulation resources considering the SOC of an energy storage system, comprising: establishing a main control area in the AGC system; establishing a control model of a generator set and an energy storage system in the main control area, and dividing the fast Frequency modulation group and slow frequency modulation group; obtain real-time measurement data from the SCADA system; calculate the original area control deviation; calculate the fast frequency modulation resource energy storage system control command based on the original ACE and considering the energy storage system SOC and the maximum allowable charging / discharging power; Correct and filter the ACE control signal of the slow frequency modulation group, and calculate the adjustment requirements of the slow frequency modulation group; generate control instructions for each control object; verify and correct the control instructions of each control object, and send them to Station side. The present invention can reduce the adjustment action of the conventional slow-speed generator set by increasing the opportunity and depth of the energy storage system to participate in the frequency regulation of the power grid, reduces the mechanical wear of the conventional generator set, and improves its power generation economy.

Description

technical field [0001] The invention relates to a coordinated control method for fast and slow frequency modulation resources considering the SOC of an energy storage system, and belongs to the technical field of automatic control of electric power systems. Background technique [0002] Frequency regulation auxiliary service is an important means to maintain the safety of power grid operation. During the operation of the power system, the AGC (Automatic Generation Control, AGC for short) system maintains the active power of the system by adjusting the active power output of frequency regulation resources in the power grid in real time. -Load supply and demand balance, so as to maintain the stability of system frequency. Due to the large differences in the power structure of different regions, the frequency modulation capabilities and efficiency of the power grids in different regions are not the same. Scheduling and system frequency modulation quality put forward higher req...

AI Technical Summary

Problems solved by technology

The combined power generation mode requires the system to be equipped with a certain battery energy storage system, and the new energy combined power generation system is formed into a dispatchable power generation unit. The application and promotion of the large-scale new energy grid-connected mode is subject to certain restrictions.

[0005] However, the above research results did not fully consider SOC management at the energy storage level, nor did they fully utilize the energy storage capacity and its technical advantages at the grid level.

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