The centralized control model of the middle-voltage layer and the distributed control model of the low-voltage layer,re-spectively,were established to address the issues that the large-scale distributed energy connected to the grid causes to fluctuate in the distribution network's operation,that the low-voltage layer's control strategies in the traditional distribution network were independent of each other,that single-layer control can only be realized by depending on the distribution network's power information,and that the voltage control effect was gradually failed to meet the load side's demand.To optimize the control strategy and increase the stability of the distribution network that was heavily accessed by photovoltaic and energy storage systems.To achieve this,a hierarchical and coor-dinated control method of distributed low-voltage layer and centralized middle-voltage layer was proposed.The findings demonstrate that the optimization goal of lowering line losses and enhancing distribution network stability is attained through the utilization of the second-order cone optimization algorithm and CPLEX solver to obtain and transmit control instructions to the appropriate nodes.The optimiza-tion control is then accomplished through the multi-flow joint action of energy flow,information flow,and control flow.It is evident that the dispersed low-pressure layer and centralized middle-pressure layer hierarchically coordinated control technique works well.
关键词
中低压配电网/分布式光储系统/分层协调控制/多流联合
Key words
medium and low voltage distribution network/distributed optical storage system/hierarchical coordinated control/mul-tistream association
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