Simulation of SLF Interrupting Performance for CO2 Gas Circuit Breaker based on Serially Connected 3 Arc Models
Abstract
This paper shows the simulation of SLF interrupting performances for CO2 gas circuit breakers. In the SLF interruption tests using 72kV-CO2 gas model circuit breakers, very large post arc currents were measured. This point is obviously difference between CO2 circuit breaker and SF6 one.
To simulate the SLF interrupting performances for the SF6 gas circuit breakers, serially connected 3 arc models were developed. In the arc model, Cassie arc model and two Mayr arc models were serially connected. It was tried to use the arc model to simulate the SLF interrupting performances for CO2 circuit breaker. As a result, it was good agreement with the measurements and simulations. The large post arc currents could be simulated by the arc model. It was shown that the SLF interrupting performance of the CO2 circuit breaker was dependent on the Mayr model simulated around voltage extinction peak. On the other hand, the performance of the SF6 gas circuit breaker was dependent on the Mayr model simulated around current zero. From the result, it proved that most severe SLF condition for the CO2 gas circuit breaker was L75 or L80.- Publication:
-
IEEJ Transactions on Power and Energy
- Pub Date:
- 2010
- DOI:
- 10.1541/ieejpes.130.888
- Bibcode:
- 2010IJTPE.130..888K
- Keywords:
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- arc model;
- CO<SUB>2</SUB> gas circuit breaker;
- SLF interruption