The direction of harmonic power flow should be understood and the position of harmonic source can be determined according to the direction of harmonic power while harmonics exist in power network.
电力系统中有谐波存在时，应该了解谐波功率的方向，并按谐波功率的方向确定谐波源的位置。
Power system Network Node thousands of mixed clouds, active power, reactive power flow, high harmonics, negative sequence current of the speed of light in the system-wide communication.
电力系统中网络结点千百个交织密布，有功潮流、无功潮流、高次谐波、负序电流等以光速在全系统范围传播。
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