Open AccessA Method of Single-terminal MMC Single-pole Grounding Protection for DC Distribution Network Based on Multi-class Similarity Analysis
Author(s) -
Wei Zhang,
Yingbin Cao,
Yuanchun Fan
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2066/1/012105
Subject(s) - ground , similarity (geometry) , fault (geology) , terminal (telecommunication) , power (physics) , fault indicator , reliability (semiconductor) , symmetrical components , interference (communication) , computer science , control theory (sociology) , reliability engineering , engineering , topology (electrical circuits) , fault detection and isolation , electrical engineering , voltage , artificial intelligence , telecommunications , physics , channel (broadcasting) , control (management) , quantum mechanics , seismology , geology , actuator , image (mathematics) , transformer
Based on the analysis model of single-pole to ground fault occurred in single-ended MMC DC distribution network, the characteristics of single-pole to ground fault are studied. The similarity of positive and negative current between the fault feeder and the non-fault feeder, the similarity of fault current between the fault feeder and the non-fault feeder, and the similarity of positive and negative current sum between the two feeders are analyzed. Based on the differences among the three types of similarity, a new method of single-pole grounding protection for DC distribution network with MMC based on multi-type similarity analysis is proposed. The simulation results show that this method can accurately determine the fault feeder, and has the characteristics of strong anti-interference ability, simple calculation and easy implementation. It can effectively solve the problem of single-pole grounding protection of DC distribution network and effectively improve the safety and reliability of power supply of DC distribution network.