810-102361-222 810-102361-222 摇臂阀接口板

【产品详情】

这种结线方式的优点是：在直流电压相同的情况下，桥阀在断态下所受的电压峰值小。当通过功率为一定值时，换流变容量小。换流变结线简单。阀的伏安容量较小。直流电压的纹波波幅较小。这也是国内直流工程常采用的结线方式。

上图中的每一个白色三角即为一个换流阀组成的桥臂。桥阀从关断状态转入导通状态必须同时具备两个条件：阀承受正向电压，即阀的阳极电位高于阴极电位；控制极得到足够能量的触发脉冲信号。而阀在导通状态下直到流通电流降为零时才会关断，并在承受足够反向电压后确保关断。这就要求换流阀的关断必须依靠外力，这也导致了换相失败等一系列问题的出线。而柔性直流输电使用的是全关断器件，能够很好的避免这个问题，是未来直流输电的前景所在。

810-102361-222 810-102361-222 摇臂阀接口板

【英文介绍】

The advantage of this connection method is that under the same DC voltage, the voltage peak value of the bridge valve in the off state is small. When the passing power is a certain value, the rheological capacity is small. The flow change is simple. The volt-ampere capacity of the valve is small. The ripple amplitude of DC voltage is small. This is also a common wiring method used in domestic DC projects.

Each white triangle in the figure above is a bridge arm composed of a converter valve. The bridge valve must have two conditions at the same time from the off state to the on-state: the valve is under positive voltage, that is, the anode potential of the valve is higher than the cathode potential; The control pole gets the trigger pulse signal with enough energy. In the on-state, the valve will not be turned off until the flow current drops to zero, and ensure that it is turned off after enduring enough reverse voltage. This requires that the shutdown of the converter valve must rely on external forces, which also leads to a series of problems such as commutation failure. The flexible DC power transmission uses a full turn-off device, which can avoid this problem well, and is the prospect of the future DC power transmission.

810-102361-222 810-102361-222 摇臂阀接口板

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