某新型动车组网侧电流谐波特性测试分析

通过对某新型动车组运行实测跟踪,采用傅里叶法分析了该动车组的网侧电流谐波特性。根据电功率法计算了该动车组的牵引力,给出了其牵引特性曲线。结果表明,无论处于牵引工况还是制动工况,被测动车组网侧电流谐波含量较低,功率超过5MW时,网侧电流各次谐波含有率不超过1%,总谐波畸变率在3%以下,等效干扰电流在1.5A以下,功率因数在0.98以上。

Test Analysis of the Grade Side Current Harmonic Characteristics of A New EMU

Through tracking the operation of a new type of EMU,the harmonic characteristics of grid side current are analyzed by using Fourier transform method. Then,the electric power method is used to calculate the EMU traction and give the traction characteristic curve. Results indicate that the grid side current of the new type EMU are in low harmonic, whether the EMU is at traction state or at braking state. When the input power of EMU is above 5 MW,harmonic content of the grid side current will be lowered to less than 1% and the total harmonic distortion rate is below 3%. At the same time, the equivalent disturbance current is below 1.5 A and the power factor of the EMU is above 0.98.