适用于实时数字仿真的开关脉冲触发补偿算法

Research on Switching Pulse Triggering Compensation Algorithm Suitable for Real-Time Digital Simulation

定步长仿真算法只能在整仿真步长时刻改变开关状态,这将导致开关动作延时并造成电压电流波形出现非特征谐波。提出了一种适用于实时数字仿真的开关脉冲触发补偿算法,该算法通过在开关动作时在开关两端节点间并联一个补偿电流源,解决了定步长仿真中开关动作时刻与仿真步长不一致的问题。最后,将开关脉冲触发补偿算法应用于单相半波可控整流电路、可控串补(thyristor controlled seriescompensator,TCSC)和静止同步补偿器(static synchronouscompensator,STATCOM)的仿真结果表明,算法是有效、可行的,提高了电力系统全数字实时仿真装置(advanceddigital power system simulator,ADPSS)对电力电子电路模拟的准确性。

Fixed step-size algorithm can only change the switch state at the moment of intact step-size and it leads to the delay of switch action and makes uncharacteristic harmonics appearing in voltage and current waveforms. A switching pulse triggering compensation algorithm suitable for real-time digital simulation is proposed, that is, to solve the inconsistency of the moment of switcher action with simulation step-size in the fixed step-size simulation a compensating current source is connected to the terminals of the switcher in parallel when it acts. Results of simulation on applying the switching pulse triggering compensation algorithm to single-phase half-wave controlled rectifier, thyristor controlled series compensator （TCSC） and static synchronous compensator （STATCOM） show that the proposed algorithm is effective and feasible, and using the proposed algorithm the accuracy of simulation results of power electronic circuits by advanced digital power system simulator （ADPSS） can be improved.