Voltage Cooperative Control Technology for Flexible Interconnected Distribution Network

As a large number of distributed generation (DG) are connected to the low-voltage distribution network (LVDN), the problem of over-limit voltage at the end of the line will be caused. Soft normally open point (SNOP) is a new type of flexible interconnection device that can be used for voltage regulation at the end of feeders in distribution networks. However, the existing SNOP voltage regulation scheme needs to recognise the voltage value of all feeder terminal nodes, which requires good communication conditions between feeders in the distribution network. This paper proposes a voltage cooperative control technology for flexible interconnection network without communication environment. This technology can use DC bus voltage for information interaction when there is no communication between feeders of distribution network, so as to realize friendly adjustment of node voltage at the end of feeder. The MATLAB / Simulink results verify the effectiveness and feasibility of the proposed scheme.