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| The resaon analysis and precautions of blackout in 220kV substation |
| Feng Shun, Jiao Hailong |
| State Gird Henan Electric Power Conporation Maintenance Company Operation, Zhengzhou 450000 |
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Abstract The paper analyzes an accident of the blackout in 220kV substation. The isolated switch auxiliary contact switch is not in place, resulting in voltage switching is not normal, eventually leading to the voltage air switch tripping. At the same time, the substation occurs the accident of the blackout because of the logic defects of automatic bus transfer equipment after the PT protection voltage anomaly disappeared. This paper introduces the regulation requirements of State Grid Corporation on voltage switching circuit, and puts forward the preventive measures to optimize the logic of theautomatic bus changeover device. This paper hope these measures can provide a reference for the operation and maintenance of 220kV substation.
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Received: 13 July 2017
Published: 22 January 2018
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2018, Vol. 19 
