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发明公开
CN106230413A 一种混合型高压直流断路器及其功率单元 无效 - 驳回

一种混合型高压直流断路器及其功率单元
摘要：
本发明涉及一种混合型高压直流断路器及其功率单元，该混合型高压直流断路器由通流支路和转移支路构成；其中通流支路包括一个机械开关和一个通流支路功率单元；转移支路包括若干个改进的H桥结构的转移支路功率单元；改进的H桥结构包括三条并联支路，其中第一条支路包括一个电容器，第二条支路和第三条支路均包括两个反串联的全控型功率器件；混合型高压直流断路器功率单元的结构即为改进的H桥结构。在分断故障电流过程中，混合型高压直流断路器功率单元避免了故障电流对全控型功率器件反并联二极管的电流冲击，减小了功率单元的损耗，可有效提高混合型高压直流断路器的使用寿命。
摘要（英）：

The invention relates to a hybrid high-voltage DC breaker and a power unit thereof. The hybrid high-voltage DC breaker is composed of a flow through branch and a transfer branch, the flow through branch comprises a mechanical switch and a power unit of the flow through branch, the transfer branch comprises improved H-bridge structures and a power unit of the transfer branch, the improved H-bridge structures comprise three parallel branches, the first branch comprises a capacitor, each of the second and third branches comprises two full-control type power devices in reverse serial connection, and the structure of the hybrid high-voltage DC breaker is the improved H-bridge structure. In the process that a fault current is disconnected, the power unit of the hybrid high-voltage DC breaker avoid impact of fault current on anti-paralleled diodes of the full-control type power devices, loss of the power unit is reduced, and the service life of the hybrid high-voltage DC breaker can be improved effectively.

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