Point-on-wave capacitor switching and adjustable speed drives

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · IEEE Transactions on Power Delivery

DOI:https://doi.org/10.1109/61.517493· OSTI ID:372226

Dick, E P; Fischer, D; Marttila, R; Mulkins, C ^[1]

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1. Ontario Hydro, Toronto, Ontario (Canada)

In principle, capacitor switching disturbances can be eliminated by closing individual breaker poles when the gap voltage is zero. In practice random variations in pole timing, and prestrikes due to finite closing speed, limit the reduction possible. A Real Time Digital Simulator was configured with a commercial circuit breaker controller to study what levels can be achieved using typical independent pole breakers. It was found that disturbances reaching 1.7 pu with random timing can be easily reduced to 1.3 pu, sufficient to prevent trips on a 460-V adjustable speed drive. The study also reviewed resonance in a customer-owned capacitor bank, raising disturbances on random switching to 2.8 pu. Here a reduction to 1.3 pu is difficult to achieve through timing of existing breakers.

• OSTI ID: 372226
• Report Number(s): CONF-960111--
• Journal Information: IEEE Transactions on Power Delivery, Journal Name: IEEE Transactions on Power Delivery Journal Issue: 3 Vol. 11; ISSN 0885-8977; ISSN ITPDE5
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CAPACITORS
ELECTRIC POWER
OPERATION
POWER DISTRIBUTION SYSTEMS
QUALITY CONTROL
SWITCHES