静止无功发生器的建模

MODELING OF STATIC VAR GENERATOR

在原先提出的一种新的开关函数正负半波分解方法的基础上 ,利用等效开关函数的概念 ,使得在上下电容电压相等的条件下 ,开关函数仍具有统一的表现形式 ,简化了静止无功发生器(SVG)的建模。推导出了 SVG的时域模型 ,并在频域内获得了 SVG输出有功电流、无功电流和直流电容电压的响应时间与 SVG参数间的关系 ,并得到了仿真结果的验证。

Based on the method discomposing the switching function into positive and negative half-waveform, this paper applies the concept of equivalent switching function. It makes the switching function have the same form under the condition that the voltages of the upper and lower capacitor at DC side are equal and simplifies the modeling of SVG. Then the modeling of time domain is derived. The relations between the parameters of SVG and the response times of real and imaginary currents, the capacitors voltage at DC side are deduced on frequency domain, and verified by simulation results.