以基波潮流和谐波潮流的解耦性为基础，提出了一种将电力系统三相不对称基波潮流和谐波潮流分离迭代的计算方法。
Based on the decoupling of fundamental power flow and harmonic power flow, a separate iteration method for calculating three-phase asymmetrical harmonic power flow in power system is presented.
使用相分量方法在分析电力系统三相不对称网络时更加方便。
Phase components method may offer advantages in the analysis of unbalanced three-phase networks.
论述了利用瞬时无功功率理论从三相不对称电流中正确检测出三相正序有功电流，并用计算出的指令电流对系统进行补偿的原理。
Based on the instantaneous reactive power theory the method correctly detects the active positive-ord current from unsymmetrical currents and applies calculated command current to compensate system.
另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.
当交流系统发生三相不对称故障时，忽略直流系统负序分量的准稳态模型将给交直流混合系统的仿真带来较大的误差。
The QSS (Quasi Steady State) model of converter which neglects the negative impedance of DC system will bring some errors when unbalanced fault occurs in AC system.
本论文所论述的系统采用MSP430F149单片机通过不对称规则采样法来输出高精度的三相spwm波形，从而实现了逆变器的SPWM控制。
The system adopts MSP430F149 MCU and asymmetry regular-sampling strategy to output high precision SPWM wave, consequently transducer's SPWM control is realized.
结果表明了PWM-FCL不但可以快速有效地限制住短路电流，并且在系统发生三相不对称故障时，可以保证故障线路非故障相以及非故障线路的正常运行。
The obtained results show that the PWM-FCL can limit the fault current quickly, and the unfaulted phase(s) and unfaulted line(s) will keep stable operation state when an asymmetry fault occurs.
三相负荷不平衡以及系统元件三相参数不对称都会引起电力系统三相不平衡。
The definition and national standard of three-phase unbalance in power system were expatiated.
配电系统三相电压的不对称会对用户造成一系列不利影响。
Voltage unbalance of three phase ac distribution systems adversely affects power customers.
配电系统三相电压的不对称会对用户造成一系列不利影响。
Voltage unbalance of three phase ac distribution systems adversely affects power customers.
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