基于SIMULINK的气隙局部放电仿真技术研究

Study on Simulation Technology of Partial Discharge in Single Void Based on SIMULINK

为了解决目前国内外局部放电仿真方法难以计算气隙局部放电暂态过程的问题,利用MATLAB(SIMULINK)的公共模块库和电力系统专业模块库,根据单气隙局部放电仿真物理模型,构造了气隙局部放电仿真计算的电路.研究了气隙放电过程的电压控制方法、分段时间控制方法、线性时间控制方法以及非线性时间控制方法,从而实现了多种控制方式下单气隙局部放电暂态过程的计算机仿真.得到的工频周期内的仿真波形和纳秒级单次放电仿真波形均与实际测量波形比较接近,证明利用SIMULINK可以进行气隙局部放电过程的仿真.该方法具有建模方便、运算速度快等优点,是一种十分有效的方法.

The existing simulation methods of partial discharge (PD) are difficult to simulate the transient process of PD in voids. In order to solve this problem, a new simulation method by using the simulation block of public module library and power system library in MATLAB (SIMULINK) was developed. According to the physical model of PD in a single void, the equivalent circuit of PD simulation was constructed. The simulation methods of different discharge processes, including discharge voltage control method, sectional time control method, linear time control method, and nonlinear time control method, were studied. Thus the computer simulation of PD transient process in a single void was realized by multiform control methods. Main characteristics of the simulation waveform in one main frequency cycle and a single waveform of PD at nanosecond order are similar to those of the experimental waveforms. It is shown that this simulation method based on SIMULINK can be used to simulate the different discharge processes, and is effective for easy modeling and fast calculation.