Development and test of a 200kV full-bridge based hybrid HVDC breaker

Recent development in DC technologies and renewable energy increase the requirement in building large HVDC networks. The world first Zhoushan five-terminal HVDC project constructed in China has been put into operation. To increase the operation reliability, a HVDC circuit breaker will be required. However the existing HVDC breaker developed in recent years still can´t deal with severe fault current of a high rise of rate in this project. Considering the availability in a real HVDC network, this paper proposed a new full-bridge based hybrid HVDC breaker. The hybrid HVDC breaker has significant technical advantage compared with other options especially in terms of current breaking ability, and the compact modular integration of the prototype greatly reduce the demand of the space. Safely test procedures is developed to verify the performance of the hybrid HVDC breaker. The test results show that the full-bridge hybrid HVDC breaker could be used in the Zhoushan five-terminal project.