Research on Dynamic Hybrid Compensation Technology and Device in Low Voltage Distribution area of Transformer

Abstract

Abstract In order to solve the problem of three-phase unbalance and low power factor caused by distributed power supply to low-voltage distribution network, a hybrid reactive power compensation system based on “intelligent capacitor +SVG” is designed. The system is composed of a small capacity Static Var Generator (SVG) with high precision compensation and several smart capacitors. Firstly, the structure of three-level SVG in the hybrid compensation system is analyzed, and the two-level SVPWM vector synthesis method is applied to three-level compensation. The control mode of intelligent capacitor is analyzed. Then the principle of reactive power distribution in hybrid compensation system is analyzed. Finally, a hybrid reactive power compensation system is designed with TMS320F28335 as the core controller of the hybrid system. The experimental results show that the hybrid reactive compensation system can effectively compensate the reactive current dynamically.