In this program the voltage and current of simultaneous faults or unbalanced power system are calculated by solving the simultaneous equations of multi-port network and of the fault boundary.

本程序应用多端口网络方程和故障端口边界方程联立求解的方法，计算电力系统各种多重故障及任意不对称运行的电压和电流。

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Although the coal conveying ability is increasing with the appearance of double-motor driving system, it leads to unbalanced power problem of double motor.

双电机拖动系统的出现，虽然使煤炭运输能力有了很大提高，但带来了电机功率不平衡问题。

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In accordance with the feature of three phase unbalanced loads, this article describes the correction principle of reactive power and the control system of single board computer.

本文针对三相不平衡负载特点，介绍了无功功率补偿原理和单板机控制系统。

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