超导限流储能系统的原理与有源限流仿真

基于限流集成原理与储能集成原理,共用一个超导磁体,将桥路型超导故障限流器(BSFCL)与超导储能系统(SMES)集成于一体,构成了超导限流储能系统(SFCL-MES).该系统解决了桥路型故障限流器不能限制故障电流稳态值以及超导储能在系统故障时的补偿容量过大的问题.所提出的SFCL-MES既可以限制故障电流峰值和稳态值,也可以补偿系统电压,提高了超导磁体的利用率.文中分析了SFCL-MES的有源限流的原理,给出了它的有源限流等效模型.在此基础上,提出了SFCL-MES的有源限流的2种实现方法:有源电阻限流和有源电压限流.在PSIM上对SFCL-MES有源限流的各种方式进行了仿真.仿真结果验证了它的可行性.

Principle and Simulation of the Active Fault Current Limiting Principle for SFCL-MES

Based on the integration principle of fault current limiting and energy storage, the bridge superconducting fault current limiter (BSFCL) and superconducting magnetic energy storage (SMES) are integrated into superconducting fault current limiter-magnetic energy storage (SFCL-MES) with just one superconducting magnet. The problems that BSFCL cannot limit the steady fault current and SMES's capacity is increased greatly when it works as compensator during short circuit period of system are overcome by SFCL-MES. SFCL-MES not only can limit the peak current and steady fault current, but also improves the efficiency of superconducting magnet. The principle of the active fault current limiting for SFCL-MES is analyzed first, then its equivalent model is given. Based on this, active resistor and active voltage strategy to realize the active current limiting are proposed. The simulation results on PSIM are presented to verify the active fault current limiting principle for SFCL-MES. The simulation results prove the feasibility of the proposed SFCL-MES.