Establishment method of load frequency combined control strategy considering hybrid energy storage auxiliary power grid

Abstract

The invention discloses a method for establishing a hybrid energy storage auxiliary power grid load frequency combined control strategy, and belongs to the technical field of power systems. In order to solve a frequency control problem faced by a power system under a double-high background and timely add energy storage equipment to carry out efficient load frequency control so as to meet a power grid frequency modulation requirement, the invention provides a method for establishing a hybrid energy storage auxiliary power grid load frequency combined control strategy. Comprising the following steps of (S1) analyzing a load frequency control model, (S2) building a hybrid energy storage joint LFC model, (S3) designing an FOPID controller and setting control parameters of the FOPID controller by adopting chaotic particle swarm optimization, and (S4) performing simulation analysis verification. The control strategy provided by the invention shows good dynamic performance under the working conditions of step and continuous load disturbance, the recovery time is shortened while the frequency deviation is reduced, and the frequency stability of the interconnected power system is recovered in time.

Description

technical field [0001] The invention takes into account the establishment method of the hybrid energy storage auxiliary power grid load frequency joint control strategy and belongs to the technical field of power systems. Background technique [0002] With the deterioration of environmental problems and the depletion of primary energy, the traditional power system cannot quickly adapt to the requirements of the "dual carbon" target. Therefore, a high proportion of renewable energy and a high proportion of power electronic equipment are gradually becoming the trends and characteristics of future power system development. On the one hand, the integration of new energy sources represented by wind power and photovoltaics reduces environmental pollution and dependence on fossil energy, and on the other hand changes the structure of traditional power grids, which also brings new challenges to the frequency stability of regional power grids . [0003] As an important index to meas...

AI Technical Summary

Problems solved by technology

However, the current research on HESS mainly considers the tie-line power frequency deviation of the LFC system under the step disturbance, and does not analyze the output and state of charge of the energy storage battery when the actual wind farm is connected to the HESS auxiliary grid frequency regulation.

Therefore, in order to effectively stabilize the frequency deviation and tie line power changes under wind power disturbances, solve the problem of life attenuation caused by frequent charging and discharging, and optimize the output and SOC of energy storage batteries, the control method of HESS auxiliary grid frequency regulation needs to be further studied.

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