Field Experiments on Overvoltage Caused by 12-kV Vacuum Circuit Breakers Switching Shunt Reactors

Yang, Qing; Zhao-hui, Zhang; Sima, Wenxia; Yang, Ming; Gang, Wei

doi:10.1109/tpwrd.2015.2475397

Cited by 21 publications

(9 citation statements)

References 26 publications

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“…The main reason of these two cases is to make a comparison with Cases 1 and 4, in which the shunt capacitors are also switched by ordinary VCBs, to investigate the impact of capacitor compensation capacity on the switching overvoltage, overcurrent, and transient. The peak line-to-neutral voltage of 10 kV power systems is as follows [16,31]:…”

Section: Field Test Results and Discussionmentioning

confidence: 99%

“…Based on our previous work in this field [15,16], this study presents a complete comparison between ordinary VCBs and phase-controlled VCBs in the application of switching 10 kV shunt capacitor banks through field tests. The following conclusions are drawn:…”

Section: Discussionmentioning

confidence: 99%

“…The duration of the closing shunt capacitor banks' current transient is about 110-120 ms, and the high-frequency oscillation frequency of the closing shunt capacitor banks' current is about 198 Hz. The peak line-to-neutral voltage of 10 kV power systems is as follows [16,31]:…”

Section: Casementioning

confidence: 99%

“…For example, in our previous work on switching shunt capacitor banks and shunt reactors [15,16], 12 kV vacuum circuit breakers (VCBs) were used, and capacitor explosion occurred during our field experiments on switching 10 kV shunt capacitor banks using ordinary VCBs in Chongqing, China, as shown in Figure 1. After checking the burnt capacitor body, we found that the failure was caused by a breakdown between the two terminals of the capacitors.…”

Section: Introductionmentioning

confidence: 99%

“…In a 10 kV ungrounded neutral system, switching shunt capacitor banks often caused severe insulation faults of shunt capacitor banks or dry type transformers in China in recent years [15,16]. For example, in our previous work on switching shunt capacitor banks and shunt reactors [15,16], 12 kV vacuum circuit breakers (VCBs) were used, and capacitor explosion occurred during our field experiments on switching 10 kV shunt capacitor banks using ordinary VCBs in Chongqing, China, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

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Field Experiments on 10 kV Switching Shunt Capacitor Banks Using Ordinary and Phase-Controlled Vacuum Circuit Breakers

et al. 2016

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During the switching on/off of shunt capacitor banks in substations, vacuum circuit breakers (VCBs) are required to switch off or to switch on the capacitive current. Therefore, the VCBs have to be operated under a harsh condition to ensure the reliability of the equipment. This study presents a complete comparison study of ordinary and phase-controlled VCBs on switching 10 kV shunt capacitor banks. An analytical analysis for switching 10 kV shunt capacitor banks is presented on the basis of a reduced circuit with an ungrounded neutral. A phase selection strategy for VCBs to switch 10 kV shunt capacitor banks is proposed. Switching on current waveforms and switching off overvoltage waveforms with, and without, phase selection were measured and discussed by field experiments in a 110 kV substation in Chongqing, China. Results show that the operation of phase-controlled VCBs for 10 kV switching shunt capacitor banks is stable, and phase-controlled VCBs can be used to implement the 10 kV switching on/off shunt capacitor banks to limit the transient overvoltage and overcurrent. The values of overvoltage and inrush current using phase-controlled VCBs are all below those with ordinary VCBs.

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Section: Field Test Results and Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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