Based on the symmetry component theory, a method of the motor protection is presented by measuring positive, negative and zero sequence current component.
基于对称分量法理论，提出了基于检测正序、负序、零序电流分量的电动机保护方法。
Compared with the previous methods, the Newton-Raphson method is used not only for solving the positive equation, but also the negative and zero sequence equations.
与已有方法相比较，所提方法不仅在正序方程中，而且也在负序和零序方程中采用牛顿法修正方程。
In typical six-phase transmission system, half positive sequence, half zero sequence and half negative sequence fault components are independent of the variance of system impedance.
在典型的六相输电系统中，半正序、半零序和半负序故障分量不受系统阻抗变化的影响。
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