IC670MDL930
IC670MDL930
IC670MDL930
IC670MDL930
电容器的过载无非是由于电压过高或者是谐波过大而引起，因此在控制器中设计过电压保护功能是必要的。在能力允许的情况下，
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《邮@.com》应该在控制器中设计电压谐波检测功能，因为导致电容器谐波过载的根本原因是电压畸变，检测电压谐波就可以实现对电容器的谐波过载保护。有了过电压保护和谐波过载保护则热继电器就可以取消。既节省了体积与成本又减少了故障点。
5、电容器的投入与切除控制策略
电容器的投入与切除应该分步进行，不应在一步操作中同时投入或者切除多台电容器。否则过大的电流突变会对系统造成比较大的影响，也不利于实现的补偿效果。
同时，对于安装有不同规格电容器的补偿装置，电容器的投切应该尽量简洁，以便尽量减少电容器的投切次数，并且可以最快的满足补偿要求。不应按最小步进台阶一步一步递增或递减。
例如补偿装置中共有三种规格的电容器，分别为10Kvar、20Kvar、40Kvar，如果测量出所需要的无功补偿量为40var以上，则应该直接投入一台40var的电容器。同样的道理，当测量出多余的无功补偿量为30var以上，则应该直接切除一台40var的电容器。
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