A Method of Active Power optimization and Distribution for AC-DC Parallel Systems

At present, VSC-HVDC is gradually being applied to grids containing distributed power sources, especially wind power. How to achieve optimal operation of system with VSC-HVDC is the focus of current research. Aiming at the problem of the lack of perfect basis for active power distribution of AC-DC channels in AC-DC parallel system with VSC-HVDC, this paper comprehensively considers the objectives of loss and safety and stability margin of AC-DC parallel systems, and proposes a method of active power optimization and distribution for AC-DC parallel operation system based on fuzzy theory. It adaptively adjusts the weights of loss and safety and stability margin to optimize the distribution of transmitted power in AC-DC channels. The feasibility of the method is verified by an example of Nan-ao AC-DC parallel system with VSC-HVDC. According to the actual situation of the project, the realization method of active power optimization and distribution is proposed and the optimization result of interval active power is obtained.