Matlab电力系统工具箱在电力系统机电暂态仿真中的应用

Application of SPS in power system electromechanical transient simulation

研究了Matlab6.0中电力系统工具箱SPS(SimPowerSystems)用于机电暂态仿真的可行性。相比于上一版本PSB(PowerSystemBlockset),SPS针对机电暂态仿真的特点,在算法上采用了滤去直流与谐波分量计算的相量法,应用自适应变步长技术避免了通过试算确定仿真步长的繁琐工作,简化了工作量。陈述了SPS机电暂态仿真的主要步骤,并分别对单机无穷大系统和WSCC-9三机九节点系统进行了小扰动和大扰动下的功角稳定仿真,同时讨论了其仿真环境的设置与加速技巧。结果表明,SPS可用于电力系统机电暂态分析,且提高了仿真速度。

The feasibility of SPS(SimPowerSystem) of Matlab 6.0 in electromechanical transient ana-lysis is studied. Compared with PSB(Power System Blockset) as the previous edition,SPS adopts phasor method,which passes over the calculations of DC and harmonic components according to the characters of electromechanical transient and applies the adaptive variable step to simplify the calculation. Its main implementation steps are described and the power angle stabilities under small and large disturbances are respectively simulated in a single-machine infinite-bus system and the WSCC - 9 system. The parameter setting and acceleration skills are discussed. Results show that SPS is useful for the electromechanical transient analysis and speeds up the simulation.