Communication-Less Voltage Coordinated Control of Flexible Interconnected Distribution Network with High EVs Penetration

With the wide access of electric vehicles (EVs), the problem of low voltage of residential distribution network will be caused. At present, the existing solutions, such as optimizing the distribution network architecture, implementing demand side management and applying energy storage systems (ESS), have many limitations. The flexible interconnected distribution network with DC link can combine the advantages of DC lines to realize the flexible interaction between the connected AC feeders, jointly bear the power shortage of EVs, improve the voltage quality at the end of the low-voltage distribution network, and increase the EVs penetration rate. This paper proposes a voltage cooperative control strategy for flexible interconnected distribution network without communication. This strategy uses DC bus voltage as the medium to realize the information interaction between interconnected feeders instead of communication and solves the problem of low voltage at the end of feeder caused by high penetration of EVs, so as to avoid cost increase and reliability reduction caused by the use of communication methods.