Energy storage station power coordination control system architecture

Abstract

The invention discloses an energy storage station power coordination control system architecture. The energy storage station power coordination control system architecture consists of a monitoring system, a coordination controller, an energy storage converter (PCS) and a battery management system (BMS), and a LAN is formed by a switch; the monitoring system can receive remote dispatching AGC and AVC instructions and calculate the power adjustment amount of each PCS, PCS adjustment can further be directly performed on a man-machine interface, and the PCS adjustment amount is transmitted to a coordination controller through an MMS adjustment instruction; the coordination controller can receive the MMS adjustment instruction of the monitoring system, directly convert the MMS adjustment instruction into a GOOSE adjustment instruction and send the GOOSE adjustment instruction to the corresponding PCS, local transient power adjustment can be further performed, voltage and current values of agrid connection point are directly collected, the power adjustment amount of each PCS is calculated based on the grid voltage and the frequency fluctuation, and the power adjustment amount is transmitted to the corresponding PCS through the GOOSE adjustment instruction. The priority of local transient adjustment in the coordination controller is higher than the MMS instruction of a monitoring background. The energy storage station power coordination control system architecture is advantaged in that coordinated power distribution in energy storage power stations is achieved, adjustment consistency is improved, and the overall operational reliability of the energy storage power stations is improved.

Description

technical field [0001] The invention relates to a power coordination control system architecture of an energy storage station, belonging to the technical field of control and operation of an electrochemical energy storage station. Background technique [0002] Energy storage can provide peak shaving, frequency regulation, backup, black start, demand response support and other services for power grid operation, and can suppress the fluctuation of new energy generation and significantly improve the consumption level of wind, light and other renewable energy. Breaking through the time and space constraints of traditional energy models has become a strategic emerging technology that countries around the world are competing to develop. Electrochemical energy storage has the advantages of fast response, small initial investment, and short construction period, and has been increasingly used in power systems. [0003] During the actual operation of the energy storage system, there ...

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Problems solved by technology

[0005] The purpose of the present invention is to design a power system control system architecture of an energy storage station in order to overcome the disadvantages of low PCS sampling accuracy of the energy storage station, poor consistency of decentralized adjustment response, complex control logic, and high cost of debugging and operation maintenance, and realize stability through the monitoring system. State remote adjustment control and distribution of AGC and AVC adjustment instructions; through the coordinated controller to sense the grid voltage and frequency fluctuations, the power of the whole station can be quickly adjusted and controlled, and functions such as primary frequency modulation and dynamic reactive power voltage regulation can be realized; all monitoring systems Both the adjustment command and the adjustment command of the coordination controller are sent to the PCS of the whole station through the coordination controller. The PCS only receives the power adjustment command of the coordination controller and performs power output. It does not need to deal with frequency modulation, dynamic voltage regulation, etc. Logic, realize the coordinated and unified control of manual adjustment, steady-state power adjustment, AGC adjustment, AVC adjustment, and transient power adjustment of the energy storage system, reduce the complexity of PCS control and operation and maintenance costs, and improve the power adjustment of the entire PCS of the energy storage power station performance, improve the support ability of the energy storage station to the safe operation of the power grid, and have a good application prospect

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