Distributed control method for coordinating charging and discharging efficiency of energy storage system in distribution network

Abstract

The invention discloses a distributed control method for coordinating the charging and discharging efficiency of the energy storage systems of a power distribution network. The method includes the following steps that: step 10) local power shortage is calculated: step 20) the sharing of the power shortage is realized, and the total power shortage of the systems is obtained; step 30) the marginal charging cost of each energy storage system is calculated, a preset pinning consistency value is determined; step 40) each energy storage agency is made to achieve consistency through pinning control; and step 50) the charging power of the energy storage systems in the power distribution network is adjusted. The control method is a completely distributed control method. With the control method adopted, global information sharing can be realized in a distributed manner, the requirement of distributed units, for plug-and-play operation, can be satisfied; marginal charging cost and charging states are considered, and the charging power of the energy storage systems is adjusted finely; and therefore, the charging and discharging efficiency of the energy storage systems in the power distribution network can be coordinated and optimized.

Description

technical field [0001] The invention belongs to the field of active distribution network operation control, and specifically relates to a distributed control method for coordinating the charging and discharging efficiency of a distribution network energy storage system. Background technique [0002] With the gradual increase in the penetration rate of distributed resources such as distributed power sources, new controllable loads, and energy storage systems, the distribution network will change from a passive one-way power supply network to an active network with two-way power flow. Active distribution network technology Came into being. The active distribution network is based on the actual operating state of the power system, with the goal of economy and safety, actively manages a large number of distributed power sources, and can adaptively adjust the network, power supply, and load distribution network. The active distribution network can not only realize active control...

AI Technical Summary

Problems solved by technology

Centralized control requires a central controller to process large amounts of data, is prone to failure, and, given the uncertainty of intermittent renewable energy sources, fluctuations in power generation can lead to unexpected structural changes, which further increases centralization burden of control

In addition, in the master-slave distributed control method, since the leader or virtual leader is used to collect and process information, similar failures or attacks may occur on the leader, which will affect system performance and reliability.

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