An optimization method and system for energy storage power station group to participate in power system AGC

Abstract

The present application discloses an optimization method and system for an energy storage power station group to participate in the AGC of the power system. The method includes: receiving an AGC command from a dispatch center, obtaining the output of the energy storage power station group, and assigning an output power reference value to each energy storage power station; Taking the output power offset and SOC offset as the penalty cost, establish an evaluation model for the real-time frequency regulation capability of the energy storage power station group whose objective function is the minimum cost of the energy storage power station group; optimize the weight coefficient of the output power offset of each energy storage power station , State of charge offset weight coefficient; optimize and solve the minimum cost objective function of the energy storage power station group; optimize the control of the energy storage power station group participating in the secondary frequency regulation. The invention enables the entire power station group to meet the secondary frequency regulation requirements of the power grid, and the energy storage sub-station with a lower cost function is preferentially called, which realizes the reasonable and accurate scheduling of each energy storage power station in the energy storage power station group, and realizes the Balanced optimization of power station groups.

Description

technical field [0001] The invention belongs to the technical field of electric power system automatic power generation control, and relates to an optimization method and system for an energy storage power station group to participate in the AGC of the electric power system. Background technique [0002] With the gradual formation of the UHV AC-DC hybrid power grid and the significant increase in the penetration rate of new energy, the stability of the power system is facing severe challenges. On the one hand, the high proportion of incoming electricity from outside the UHV area has squeezed the power generation share of some units in the local receiving power grid, resulting in insufficient frequency regulation reserve capacity. Determinism makes the power-frequency dynamic imbalance of the system aggravated. The situation of power system frequency security and stability is becoming more and more severe. Only relying on conventional units to participate in Automatic Gener...

AI Technical Summary

Problems solved by technology

Only relying on conventional units to participate in Automatic Generation Control (AGC) to provide frequency regulation auxiliary services for the grid can no longer meet the frequency control requirements of the system

Images