氧化锌避雷器式故障限流器对电力系统暂态稳定的影响

介绍了氧化锌避雷器式故障限流器的工作原理和分析模型,针对安装该种故障限流器的单机-无穷大系统,研究了不同工况下发电机的功角特性曲线,利用等面积定则详细分析了其暂态物理过程。在此基础上定义了一系列定量描述暂态稳定的指标,分别针对有无故障限流器2种情况,应用Matlab构建了单机和多机系统的仿真模型,分析了不同限流比、故障类型和故障切除时间下的系统暂态稳定特性。理论分析和仿真结果都表明:安装氧化锌避雷器式故障限流器,可有效抑制摇摆曲线的振荡幅度并缩短衰减周期,延长系统的极限切除时间,提高系统的暂态稳定能力。

Influence of MOA-based FCL on power system transient stability

The operating principle and analytical model of MOA(Metal Oxide Arrester)-based FCL(Fault Current Limiter)are presented.For the typical one-machine infinite-bus system with FCL,the power-angle characteristics of generator are studied in various operation conditions,and its transient physical process is analyzed in detail using Equal Area Criterion,based on which a series of indexes are defined to describe transient stability quantificationally.Simulation models of one-machine and multi-machine systems with and without FCL are constructed with Matlab,based on which the transient stability characteristics of power systems are studied for different current-limiting factors,fault types and fault clearance times.Both theoretical analysis and simulative results show that,the installation of MOA-based FCL can effectively suppress the oscillatory amplitudes of swing curves,reduce the decaying period,extend the critical clearance time and hence improve the transient stability of power system.