The Research Of Series-Compensated Voltage Regulator Based On Delta-Conversion

As the economy develops rapidly and the load of power increases, the power quality problem such as voltage fluctuations and distortions become conspicuous in our country. The power supply based on Delta inverter can stabilize voltage and improve the power factor of the input to reduce harmonics. Therefore it has important actual meaning and research value.This article analyzed the Delta inverter voltage-stabilized source principle and established the equivalent circuit model which the Delta inverter and the electrical network affected mutually, obtained the ideal compensation voltage and the compensation voltage relationship, analyzed the filter and its position and the electrical parameter's effect to the actual compensation voltage. This article designed the inverter output filter and the compensation transformer, calculated the inductance parameter and the electric capacity parameter of the PWM rectifier.In view of the system, the feed-forward control characteristic, the feedback control, characteristic and the improved feed-forward control characteristic of the Delta inverter and the indirect and the direct electric current control characteristic of the PWM rectifier had been compared separately, and established the improvement feed-forward control and the direct electric current control simulation model using the MATLAB software to analyzed the Delta inversion voltage stabilizer speed and precision.The experimental circuits are developed. It includes the circuit of signal occur simultaneously with the power voltage and the circuit-driven, the protection circuit, and so on. The experimental confirmation to the research content achieved the anticipated research goal.