DOI:10.1007/s40565-018-0376-6 |
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Assessment of commutation failure in HVDC systems considering spatial-temporal discreteness of AC system faults |
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Net amount: 1265 |
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Author:
Huanhuan YANG1, Zexiang CAI1, Xiaohua LI1, Chaoyun YU1
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Author Affiliation:
1.School of Electric Power, South China University of Technology, Guangzhou 510640, China
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Foundation: |
This work was supported by National Natural
Science Foundation of China (No. 51407079). |
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Abstract: |
This paper presents a novel commutation failure
(CF) assessment method considering the influences of
voltage magnitude drop, phase shift, and spatial-temporal
discreteness of AC system faults. The commutating voltage-time
area is employed to analyze the spatial-temporal
discreteness of AC system faults causing CF in high-voltage
direct current systems, and the influences of fault
position and fault time on CF are revealed. Based on this, a
novel CF criterion is proposed, further considering the
influence of voltage phase shift and the spatial-temporal
discreteness. Then this research develops a new CF
assessment method, which does not rely on electromagnetic
transient simulations. A real case from the China
Southern Power Grid is used to verify the practicability of
the proposed method by comparing with simulation results
obtained using PSCAD/EMTDC. |
Keywords: |
Commutation failure, Spatial-temporal
discreteness, Phase shift, Assessment method |
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Online Time:2018/09/22 |
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