电力电子器件的发展趋势是:一方面研制经济性能好的器件,以便降低设备造价;另一方面,研制开断功率更大的高性能器件。最近,国外公司宣布研制成功以碳化硅(Sic)为基片的电力电子器件。基片的耐压和热容量可大幅度提高,而元件的损耗却大大降低,从而使元件的断开功率可望有数量级的飞跃。这预示用电子高压断路器取代机械的高压断路器(油断路器、 The development trend of power electronic devices is: on the one hand to develop devices with good economic performance, in order to reduce equipment costs; the other hand, the development of higher power devices breaking power. Recently, foreign companies announced the successful development of silicon carbide (Sic) based power electronics. Substrate pressure and heat capacity can be greatly improved, while the component loss is greatly reduced, so that the components of the disconnect power is expected to be an order of magnitude leap. This indicates that the use of electronic high-voltage circuit breakers to replace the mechanical high-voltage circuit breakers (oil circuit breakers,