ZHENG Tao,LYU Wenxuan.Adaptive Reclosing Scheme for DC Distribution Network Based on Cascaded Full-bridge DC Circuit Breaker[J].Automation of Electric Power Systems,2020,44(22):78-86.
ZHENG Tao,LYU Wenxuan.Adaptive Reclosing Scheme for DC Distribution Network Based on Cascaded Full-bridge DC Circuit Breaker[J].Automation of Electric Power Systems,2020,44(22):78-86. DOI: 10.7500/AEPS20200115010.
Adaptive Reclosing Scheme for DC Distribution Network Based on Cascaded Full-bridge DC Circuit Breaker
Flexible DC distribution network is an important development area of power distribution system
which can be built with overhead lines or cables. Considering the faults on overhead lines are mostly temporary
it is necessary for DC distribution network based on overhead lines to adopt effective reclosing scheme to improve power reliability. In order to realize this objective
this paper utilizes the different phase characteristics between voltage and current of the breaker on the line terminal
and further proposes an adaptive reclosing scheme based on the cascaded full-bridge DC circuit breaker (DCCB). Firstly
the fault detection voltage at a given frequency is generated by the active control of the transmission branch of the DCCB. Secondly
temporary or permanent faults are distinguished according to the different phase characteristics of voltage and current on the line terminal of the DCCB at this frequency. Moreover
the influence of some factors like transition resistance is analyzed. Finally
a model of DC distribution network is built on PSCAD/EMTDC to verify the feasibility and effectiveness of the proposed adaptive reclosing scheme.
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