Research on loop closing model of AC-DC power grid based on voltage source converter multi-terminal DC power flow control strategy
CAI Jianyi1, LIN Yuxin1, BAI Hao2
1. Shantou Power Supply Bureau of Guangdong Power Grid Co., Ltd, Shantou, Guangdong 515000; 2. Electric Power Research Institute, CSG, Guangzhou 510663
Abstract：For the voltage source converter multi-terminal DC (VSC-MTDC) and AC hybrid operation power grid, the voltage source converter multi-terminal DC system power flow control strategy may lead to power flow detour when the power grid is closed, and then lead to the risk of equipment overload or tripping, which seriously threatens the safe operation of the power grid. This paper presents a typical AC-DC hybrid operation case of intelligent distribution network, analyzes the two scenarios before and after starting the power flow control strategy of voltage source converter multi-terminal DC system, and establishes the closed-loop model of AC-DC hybrid operation power grid with closed-loop current constraint. It is proved that the power flow control strategy is the key factor affecting the loop closing. On this basis, the boundary parameters of the security loop are determined and effective risk management and control strategies are proposed.
蔡建逸, 林裕新, 白浩. 基于多端柔性直流输电系统潮流控制策略的交直流电网合环模型研究[J]. 电气技术, 2021, 22(5): 17-23.
CAI Jianyi, LIN Yuxin, BAI Hao. Research on loop closing model of AC-DC power grid based on voltage source converter multi-terminal DC power flow control strategy. Electrical Engineering, 2021, 22(5): 17-23.
2021, Vol. 22 
