Solving the problem of reactive power compensation in the distribution network is extremely important for network loss reduction and energy conservation. Appropriately improve the power factor of the user, not only can fully exert the production capacity of the power supply equipment, reduce the line loss, reduce the pressure of the upper-level power grid compensation, improve the voltage quality, and can improve the working efficiency of the user’s power equipment, and effectively reduce the power Loss and reduce user electricity bills. Its social and economic benefits are very significant. Therefore, the development and promotion of energy-saving intelligent integrated power capacitors has a significant effect on China’s power conservation.
The new generation of intelligent integrated power capacitors developed by Nande Electric consists of intelligent measurement and control module, thyristor composite switch module, line protection module and power capacitor. The principle structure of the intelligent integrated power capacitor is shown in Figure 1. It can replace the automatic reactive power compensation device which is composed of intelligent controller, fuse, composite switch or mechanical contactor, thermal relay, low-voltage power capacitor, indicator light and other parts connected by wires in the cabinet and the cabinet surface. The mechanical contactor or mechatronic switch of the traditional reactive power compensation device is changed as the switching mode of the switching capacitor, which changes the bulky and bulky structural mode of the conventional reactive power compensation device, so that the new low-voltage reactive power compensation device has It has the characteristics of good compensation effect, low power consumption, small size, cost saving, flexible use, convenient maintenance, long service life and high reliability. It meets the high requirements of modern power grid for reactive power compensation.
The main point of the design of intelligent integrated power capacitors is the use of electronic real-time detection signal feedback, non-contact photoelectric triggering technology, thyristor and magnetic holding relay composite switching technology to achieve equal voltage switching. Figure 1 Intelligent integrated power capacitor working principle block diagram realization The true “zero-crossing” (the switching current is almost zero) eliminates harmonic injection. Its intelligent automatic combination control mode uses reactive power, power factor, reactive voltage and other parameters as control parameters to achieve the best compensation combination.
Post time: Dec-28-2018