Research on Voltage Coordinated Control Strategy of Low-Voltage Distribution Network Based on SNOP in Weak Communication Condition

With the rapid development and widespread application of renewable energy, its large-scale access to the low-voltage AC distribution network has brought many challenges. Among them, the problem of voltage violation is particularly prominent. If it is not effectively managed and regulated, it will directly affect the normal power demand of users. Aiming at this problem, this paper proposes a voltage coordinated control scheme based on soft normally open point (SNOP) for flexible interconnected low-voltage distribution network, which is suitable. The scheme effectively overcomes the difficulty caused by the imperfect communication network in the low-voltage distribution system, and combines the distributed energy storage system (ESS) to realize the control of the terminal voltage violation of the interconnected distribution line, which further improves the safety and stability of the system operation. By constructing a flexible simulation model of the interconnected distribution network in Matlab/Simulink, the feasibility and effectiveness of the proposed control strategy are verified.