Open AccessA Protection Method for DC Distribution Network with Single Pole Grounding Based on Integrative Two-terminal MMC
Author(s) -
Hua Jiang,
Xinglai Shen,
Bing Ma
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 - 10.1088/1742-6596/2066/1/012104
Subject(s) - ground , terminal (telecommunication) , fault (geology) , position (finance) , similarity (geometry) , line (geometry) , reliability (semiconductor) , transient (computer programming) , earthing system , engineering , computer science , electrical engineering , control theory (sociology) , mathematics , artificial intelligence , telecommunications , physics , geometry , geology , power (physics) , economics , image (mathematics) , control (management) , finance , quantum mechanics , seismology , operating system
Based on the analysis model of unipolar grounding fault occurred in two-terminal MMC DC distribution network, the characteristics of unipolar grounding fault are studied. The similarity characteristics of transient currents between the fault line and the non-fault line are analyzed when the fault is located in the feeder, tie line and bus respectively. According to the characteristics of single-pole grounding fault and the similarity principle, a new single-pole grounding protection method for DC distribution network based on two-terminal MMC is proposed. The simulation results show that the proposed single-pole grounding protection method can accurately determine the single-pole grounding fault at any position of the DC distribution network. The research results can effectively solve the problem of single-pole grounding protection in DC distribution network, and effectively improve the security and reliability of DC distribution network.