The Muti-Regional Coordinated Control Strategy of Distribution Network Adapting to Multiple Power Sellers

Abstract

The number of power sellers for construction progress and operation of incremental distribution network is increasing and the control methods of reginal grids becomes more diverse in the power market reform progress. In order to adapt to the trend of the power market reform, this paper proposes a coordinated control strategy to fit the requirement of multiple operation model. The regional grid of power sellers and the public grid are established according to the control requirement of each operator. When the public grid operates in a long-term scale control mode of the whole network, the regional grids of power sellers’ grid are equivalent to the load/generator node to establish electrical contact with the public grid. The regional grid of power sellers performs shortterm scale control mode based on the operation results of the public grids. In order to ensure the power balance between the grids, the regional dynamic interactive power limit model is established which quantifies the delivering power of the regional grid with the voltage variation characteristics. The case analysis result indicates that the coordinated control strategy proposed by this paper has better computational efficiency than the centralized calculation method.