earticle

영어

Compared with traditional PWM converters, the matrix converter with high development potential has many advantages, such as simpler structure, better controllable performance, higher power factor, less harmonic pollution to the grid and no large-capacity DC capacitor. Currently, among a variety of modulation algorithms for the matrix converter, the double SVPWM control algorithm is the most mature. This paper analyzes the double SVPWM control strategy and the realization of the variable frequency and variable voltage. Aiming at the pollution problem from the input side current harmonics to grid, a damping LC filter is designed in the input side. However, the input filter will cause reactive power increase and result in power factor decrease of the grid side. To ensure the unit power factor of the grid side, this paper deduces the relationship between the actual power factor angle of the grid side and damping filter. By adjusting the setting value of the input side power factor, the unit power factor of the grid side can be obtained. Simulation results verify the validity of the theoretical analysis.