Distributed energy storage control system and method

Abstract

The invention provides a distributed energy storage control system and method. The distributed energy storage control system comprises an energy management system, a battery management system, an energy storage converter, a distributed power generation system and an energy storage system. During planned off-grid operation, the energy management system sends an off-grid operation instruction, the energy storage converter acts after receiving the instruction to enable the voltage frequency and the phase angle of the alternating current side to be consistent with those of the power grid, and thenthe energy storage converter sends an instruction to the PCC quick switch to enable the distributed power generation system to be separated from the power grid. During non-planned off-grid operation,the energy storage converter sends an instruction within a first preset time after detecting a power grid fault, so that the PCC quick switch is switched off within a second preset time. The method comprises an independent operation strategy, a reverse power protection strategy, a demand control strategy, a peak clipping and valley filling strategy and a load tracking strategy. Storage is carriedout when electric energy is excessive and cannot be consumed, discharging is carried out when the electric energy is insufficient, peak clipping and valley filling are achieved, and flexibility and controllability are truly achieved.

Description

technical field [0001] The present disclosure relates to the technical field of distributed energy storage, and in particular to a distributed energy storage control system and method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Regarding the operation of domestic distributed new energy power stations, the inventors of the present disclosure have found that the following problems generally exist: [0004] (1) The energy utilization rate is not high, and there is a phenomenon of abandoning wind and light: "abandoning wind and light" refers to the shutdown caused by the continuous increase of installed capacity of photovoltaic and wind power enterprises, but cannot be accommodated; low power quality, power factor adjustment investment More: A distributed power station composed of multiple inverters will generate a large number of harm...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies of the prior art, the present disclosure provides a distributed energy storage control system and method, which stores when the excess electric energy cannot be absorbed, discharges when the electric energy is insufficient, and cooperates with the distributed power generation system when the external network is out of power. Drive the load island operation of the factory area, cooperate with the photovoltaic power generation system, realize peak shaving and valley filling, participate in demand side response and power market transactions, and truly realize flexibility and controllability

Images