Principle Experiment of Current Commutated Hybrid DCCB for HVDC Transmission Systems

We propose a current commutated hybrid Direct Current Circuit Breaker (DCCB) for HVDC transmission systems. The transmission losses of the developed DCCB are quite low because the normal current path includes only mechanical switches. Fast mechanical switches and a commutation circuit realize a fast current interruption. We also developed a test method for DCCBs, which allows for the use of existing facility such as AC generators. We tested the developed hybrid DCCB by the developed test method, therefore the test results prove the operation principle of the hybrid DCCB and the test method.