配电网公共连接点谐波评估与仿真(10)
图4-2-1 采用等效负荷模型时的仿真电路图
由于仿真模型中的谐波源比较多，因此将谐波源做成分层模块的内部电路，然后再把分层模块调入根电路中。其中各个分层模块的仿真电路图如图4-2-2~4-2-7所示。
图4-2-2 U1模块电路图
图4-2-3 U2模块电路图
图4-2-4 I1模块电路图
图4-2-5 I2模块电路图
图4-2-6 I3模块电路图
图4-2-7 I4模块电路图
参数设置如下：
系统侧：2-19次谐波电压源（即U1、U2模块里电压源）的幅值分别为：10.16V, 222.3V, 2.858V, 190.5V, 5.081V, 163.5V, 3.811V, 95.26V, 6.351V, 127V,
8.256V,127V,5.716V,50.81V,4.446V,57.16V,6.351V,76.21V。
支路1:2-19次谐波电流源（即I1、I2模块里电流源）的幅值分别为：1.328A,29.408A,0.271A,14.56A,0.221A,8.548A,0.113A,2.322A,0.128A, 2.846A,0.143A,2.352A,0.128A,1.3A,0.143A,1.8576A,0.126A,1.3524A。
支路2:2-19次谐波电流源（即I3、I4模块里电流源）的幅值分别为：0.1A,1.6A,0.018A,0.78A,0.018A,0.55A,0.01A,0.12A,0.01A,0.14A,0.01A,
0.11A,0.01A,0.16A,0.01A,0.13A,0.01A,0.08A。
谐波电压总畸变率THD为