摘要
研究了简化的电磁暂态电力电子器件应用于机电暂态仿真的可行性。使用MATLAB-SIMULINK的相量算法,将电网中电流电压视为相量,采用滤去直流与谐波分量的隐式梯形法求解相量方程。在相量算法下搭建静止同步补偿装置(STATCOM)模型,对其电流和电压相量进行dq分解,采用PI和前馈解耦控制,通过对风电机组正常情况下的无功补偿以及短路故障下低电压穿越能力的无功支持来验证这种方法的可行性。仿真结果表明,在相量算法下,STATCOM具有快速无功调节的能力,从而验证了简化电磁暂态的STATCOM应用于机电暂态仿真的可行性,也体现出相量算法在大规模电力系统仿真中的精确性和快速性。
ABSTRACT:To study electromagnetic transient power elec-tronic device in electromechanical transient simulation,a sim-plified phasor model is proposed in this paper. Based on MATLAB-SIMULINK phasor algorithm,the simulation regards current and voltage values as phasors,and uses the implicit trapezoid method with filtered DC and harmonic components to solve phasor equations. In the phasor algorithm,a STATCOM model is built,and PI and feedforward decoupling control are used to implement reactive compensation of the variable pitch induction generators to verify feasibility of the phasor model. The results show that STATCOM has the ability of fast reactive power regulation, so the simulation verifies validity of the proposed method and also reflects the accuracy and quickness of the phasor algorithm in the large power system simulation.
出处
《电网与清洁能源》
2014年第9期92-97,101,共7页
Power System and Clean Energy