With the increasing attention to the loss reduction of distribution network, low-voltage reactive power compensation technology has been widely used in distribution system. From static compensation to dynamic compensation, from contact compensation to non-contact compensation, we have gained rich operating experience. A large number of examples and device operation experience show that the reliability of low-voltage reactive power compensation devices widely used in distribution networks is the most important and urgent problem to be solved in the development and research of reactive power compensation devices because of their scattered installation locations, large number, inconvenient operation and maintenance and heavy workload. The low-voltage reactive power compensation device developed by Quanzhou Qixing Electric Co., Ltd. adopts electromechanical integrated switch to switch capacitors. The mechatronics switch consists of thyristor, its control circuit and contactor. When the capacitor is put into operation, first turn on the thyristor switch, then turn on the contactor, and then turn off the thyristor switch. When the capacitor is removed, first turn on the thyristor switch, then turn off the contactor and then turn off the thyristor switch.
Reactive power compensation device of mechatronics switch switches capacitor. After the switch is turned on, there is basically no power consumption or heat generation, and there is no need to install a large radiator and cooling fan. It has the advantages of thyristor switching (zero-crossing switching) at the moment of switching on and off, and the contactor does not consume electricity when it is normally turned on; It can effectively reduce the failure rate of equipment and improve the reliability and service life of equipment.