Micro-grid line protection algorithm based on disturbance voltage

The invention relates to a micro-grid line protection method, in particular to a micro-grid line protection algorithm based on disturbance voltage. The method comprises the following steps that (1) a standard voltage transformer is used for detecting three-phase terminal voltage; (2) alternating vol...

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Bibliographische Detailangaben
Hauptverfasser:	YUE JUNFENG, KANG YAOSHENG, HE CHUNNING, ZHANG JIANCHANG, YAN JUNJIE, HAN TAO, YAN HONGXING, LI JIANGHAO, WU YING
Format:	Patent
Sprache:	eng
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
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Beschreibung
Zusammenfassung:	The invention relates to a micro-grid line protection method, in particular to a micro-grid line protection algorithm based on disturbance voltage. The method comprises the following steps that (1) a standard voltage transformer is used for detecting three-phase terminal voltage; (2) alternating voltage is converted into direct current through the Park transformation; (3) the direct current and a reference signal (Uqref) are compared to obtain the disturbance voltage (Ve); (4) according to the micro-grid disturbance voltage, a trip instruction is sent in a delayed mode. According to the micro-grid line protection algorithm, the micro-grid operation characteristics are fully considered, the micro-grid protection action reliability is improved, and the micro-grid line protection algorithm has good prospects.