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    • 4. 发明申请
    • COMPOSITE HIGH VOLTAGE DC CIRCUIT BREAKER
    • 复合高压直流断路器
    • US20150131189A1
    • 2015-05-14
    • US14381570
    • 2012-03-01
    • Colin Charnock DavidsonColin Donald Murray OatesAlistair Burnett
    • Colin Charnock DavidsonColin Donald Murray OatesAlistair Burnett
    • H02H3/10H02H9/04H02H9/02
    • H02H3/10H01H9/542H01H9/548H01H33/596H01H2009/543H01H2009/544H02H3/025H02H3/087H02H9/02H02H9/044H03K17/08116
    • A circuit breaker for high voltage direct current (HVDC) power transmission includes a module with a pair of terminals for connection to an electrical network, and four of conduction paths. Each first conduction path includes a mechanical switch connected in series with at least one first semiconductor switch to selectively allow current to flow between the first and second terminals through the first conduction path in a first mode of operation or commutate current from the first conduction path to the second conduction path in a second mode of operation. The second conduction path also has a semiconductor switch to selectively allow current to flow between the terminals through the second conduction path or commutate current from the second conduction path to the third conduction path in the second mode of operation. The third conduction path has a snubber circuit with an energy storage device to control a rate of change of voltage across the mechanical switch and oppose current flowing between the first and second terminals in the second mode of operation. The fourth conduction path has a resistive element to absorb and dissipate energy in the second mode of operation and divert charging current from the first and second terminals away from the energy storage device to limit a maximum voltage across the pair of terminals.
    • 用于高压直流(HVDC)电力传输的断路器包括具有用于连接到电网的一对端子的模块和四个导电路径。 每个第一导电路径包括与至少一个第一半导体开关串联连接的机械开关,以选择性地允许电流在第一操作模式中通过第一导电路径在第一和第二端子之间流动,或者从第一导电路径到 第二传导路径处于第二操作模式。 第二导电路径还具有半导体开关,以选择性地允许电流在第二操作模式中通过第二导电路径在端子之间流动或从第二导电路径到第三导电路径的整流电流。 第三导电路径具有缓冲电路,其具有能量存储装置,用于控制横跨机械开关的电压变化率,并且在第二操作模式下与第一和第二端子之间的电流相反。 第四导电路径具有电阻元件,以在第二操作模式中吸收和耗散能量,并将来自第一和第二端子的充电电流从能量存储装置转移以限制该对端子两端的最大电压。