Bolong Zhai
ABSTRACT
After distributed power sources with high penetration are connected to the distribution network, the conventional current differential protection fails to apply the generalized Kirchhoff's current law due to the unpredictable branch currents. This leads to a significant degradation of the performance of traditional differential protection. To address this issue, this paper proposes using structural similarity as a new criterion for current differential protection. 5G communication technology is utilized to facilitate fast information transmission between distributed power sources and protection devices, enabling rapid recovery and reconnection of distributed power sources after temporary disconnection or fault removal. Thus, a novel current differential protection scheme is developed. Simulation results demonstrate that the proposed scheme can effectively overcome the risk of misoperation caused by the unpredictable branch currents of distributed power sources in traditional current differential protection. Additionally, it exhibits good sensitivity in detecting faults within the zone of protection.
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Index Terms
- A new scheme for current differential protection of active distribution network based on waveform similarity
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