Approach to solve synthetic test circuit for testing of high voltage circuit breaker

Development in electrical power transmission system and higher voltage level operation of power systems require circuit breakers of higher interrupting capability. To ensure interrupting capability, circuit breakers must verify and prove the TRV withstand capability specified according to standards. To test high voltage circuit breakers, direct testing using power system network or short-circuit alternators are not feasible and practical solution. But synthetic testing is an alternative equivalent economical method for testing of high voltage circuit breakers. In synthetic test circuit, it is quite complex to choose circuit components value for a desired TRV envelope. This paper purposes a synthesis process to design synthetic test circuit to generate four-parameter TRV envelope for circuit breaker testing. By using proposed approach a synthetic test circuit has been designed and simulated in MATLAB to generate four-parameter TRV envelope for 145 kV, 40 kA rating circuit breaker.