超导限流器的多目标优化设计算法研究

Multi-objective Optimization Design of Superconducting Fault Current Limiters

为优化设计超导限流器参数,提出了超导限流器在电力网络中多目标优化设计的一种改进算法。即先基于MATLAB和PSCAD/EMTDC搭建超导限流器仿真模型,并利用有限元模型对其进行准确性校验;然后根据上海市某配电网搭建电力网络仿真模型,从而进行优化设计。在仿真计算过程中,考虑了短路类型和短路初始相位角所带来的影响,从而使超导限流器的优化参数可以通过三个优化目标和四个约束条件来获得。仿真结果表明,参数优化后的超导限流器能在不影响电网正常运行的同时有效限制短路电流。

In order to optimize the design of superconducting fault current limiters （SFCLs）, this paper presents an improved algorithm for multi-objective optimization design for electrical power grids. Firstly, a numerical model of resistive-type SFCL based on MATLAB and PSCAD/EMTDC is built and its accuracy is verified by the finite element method （FEM） model. Then a numerical model of distribution network in Shanghai City is built. Simulations considering differ ent types of short-circuit fault in the real distribution network are carried out to get the optimized function. Different initial phase angles are also taken into account. Finally, the optimizing parameters of SFCL are determined by considering three optimized objectives and four constraints. The simulation results show that the optimized SFCL can limit short circuit current effectively without any influence on the performance of the power grid.