| Citation:Yang Xiao, Jinxin Ouyang, Xiaofu Xiong, Yutong Wang, Yongjie Luo.Fault protection method of single-phasebreak for distribution network consideringthe influence of neutral grounding modes[J].Protection and Control of Modern Power Systems,2020,V5(2):1-13[Copy] |
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| Abstract: |
| With the rapid development of modern distribution network and the access of distributed generation, the network
structure is becoming increasingly complex. Frequent single-phase break faults have seriously affected equipment
and personal safety and stable operation of the power system. However, with the development and application of
the composite neutral grounding modes, the protection of single-phase break fault is facing new challenges. This
paper proposes a protection method of single-phase break fault for distribution network considering the influence
of neutral grounding modes. The characteristics of neutral voltage and sequence current are analyzed under
normal operation and single-phase break fault with different grounding modes. Following this, the protection
criterion based on neutral voltage and sequence current variation is constructed. The protection method of singlephase
break fault for distribution network is proposed, which is applicable for various neutral grounding modes.
Theoretical analysis and simulation results show that the protection method is less affected by system asymmetry,
fault location and load distribution. The method has higher sensitivity, reliability and adaptability. |
| Key words: Distribution network, Single-phase break fault, Protection, Neutral grounding |
| DOI：doi.org/10.1186/s41601-020-00156-w |
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| Fund: |
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