Reactive power compensation device and control method with switching tube based on CAN bus

Abstract

The invention relates to a CAN (controller area network) bus-based reactive power compensation device provided with switching tubes, and a control method of the device. The CAN-based reactive power compensation device comprises more than one electrical control cabinet, wherein each electrical control cabinet comprises an alternating current (AC) bus; the AC buses sequentially penetrate through first current transformers and second current transformers which are arranged outside the electrical control cabinets, and are then electrically connected with a reactive load; the AC buses are also electrically connected with the ends of incoming line contactors arranged in the electrical control cabinets; conductors arranged at the other ends of the incoming line contactors penetrate through third current transformers arranged in the electrical control cabinets and are then electrically connected with input ends of grid connection filters arranged in the electrical control cabinets; output ends of the grid connection filters are electrically connected with insulated gate bipolar translator (IGBT) switching tube groups arranged in the electrical control cabinets; the defects that in the prior art, the sampling signals are not accurate, the compensation effect is poor, the requirement of the state grid corporation of China on the power factor cannot be reached due to the attenuation of current signals can be effectively avoided by the CAN-based reactive power compensation device combined with the control method of the device.

Description

technical field [0001] The invention belongs to the technical field of reactive power compensation, and in particular relates to a reactive power compensation device with a switching tube based on a CAN bus and a control method thereof. Background technique [0002] With the continuous improvement of the State Grid's requirements for power quality, the State Grid is gradually increasing the punishment for enterprises whose power factors do not meet the standards. Therefore, the conventional reactive power compensation device adopts CT series connection and PT parallel connection method to calculate the reactive power of the load in each compensation device. After multiple CTs are connected in series, the current signal attenuates, resulting in inaccurate sampling signals and poor compensation effect Meet the requirements of the national grid for power factor. Contents of the invention [0003] The object of the present invention provides a kind of reactive power compensat...

AI Technical Summary

Problems solved by technology

Combined with its control method, it can effectively avoid the current signal attenuation in the prior art, which leads to inaccurate sampling signals, poor compensation effect and failure to meet the requirements of the national grid for power factor.

Images