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1·A new method for the positive sequence voltage detection is presented.

提出一种电网电压正序分量的近似计算及实现方法。

2·A new directional element based on the fault component positive sequence reactance (FCPSR) is presented.

提出了基于故障分量正序电抗的方向元件。

3·The pulse steering circuit so designed solves fairly well the transition between positive sequence and negative sequence.

所设计的脉冲导向电路较好地解决顺序与逆序互相之间的过渡问题。

4·In the paper, the reduced single phase short-circuit current equation expressing as positive sequence impi dance only is showed.

文中还提出了低压系统中只用正序阻抗表达的单相短路电流的简化计算公式。

5·The measured distance of the lump parameter circuit model can be converted to the correspondingly matching positive sequence measured impedance.

根据集中参数线路模型算法的实测距离，换算成与模型匹配的正序测量阻抗。

6·The zero sequence component and the positive sequence component equations of transmission lines are derived on the basis of telegraph equations.

运用电报方程推导出三线-地耦合传输线零序分量和正序分量传输线方程。

7·The three phase detecting method closely connects with the Park transform and the result is the positive sequence part of the fundamental frequency.

三相求法与派克变换有很密切的联系，求出的是三相基波正序分量。

8·Measures, such as the floating of threshold, braking by positive sequence current, driving up the threshold during power swing, etc are suggested to prevent th.

采用浮动门槛、正序电流制动和静稳破坏后提高动作门槛值的方法，来防止系统振荡时误启动。

9·The transformation of the instantaneous value symmetry component applied, the positive sequence space vector of fault component of the voltage and current can be derived.

应用瞬时值对称分量变换，可提取电压、电流故障分量的正序空间向量。

10·The proposed method doesn't need hardware synchronization circuit and can perform the calculation of fundamental positive sequence component of the supply voltage in real time.

这种方法不需要硬件同步电路，能实时地计算电源电压中的基波正序分量。