The Synthetic Compensation Of Reactive Power And Voltage Based On Controllable Reactor

In power system, the voltage pulsation and deficiency or surplus of reactive power will have a great effect on the quality of electric power supply. Through the appropriate and effective way of compensation, we can keep the balance of reactive power in the maximum degree by the maintenance of acceptable voltage. That's to say, quality of power supply can be improved greatly by the synthetic compensation of reactive power and voltage.At first, the paple does some theoretical expounding on the control objective and the principle of the substation synthetic compensation of reactive power and voltage. According to the characteristic of nine-area diagram.the corresponding control ordination is designed. Subsequently the paple presents the realization of the synthetic compensation of reactive power and voltage mentioned above, which is so called FC + MCR (Fixed Capcitor + Magnetic-Valve Controllable Reactor), and is one of the SVC (Static Var Compensator). This paple analyzes the principle of MCR in detail, and derives the characteristics. In addition, a new structure of MCR - Three phrase hexastyle MCR. It's magnetic flow distribution is analysed and mode of connection is optimized.This paper presents a controller with an SCM (Single Chip Microcomputer) as the core, which can automatically control the practical MCR. It consists of measure circuit, control circuit, trigger circuit, keyboard, display circuit and communicating circuit. The measuring circuit is to measure the secondary voltages ang currents of transformer and capture the synchronous signal; the control circuit is to calculate the control outputs with the measured signal and the input parameter according the relevant control scheme; the trigger circuit products the pulses to trigger the thyristors with the control outputs; user can input control instruction with the keyboard, and the display circuit can show states of the system intuitionisticly; communicating circuit provides the data to control station, this can realize the concentrative control.At the end of paper, simulator and experimental research are carried out for the compensator model; the results accord with the theoretical analyses done before. So the compensator is proved to be accurate in theory and feasible in practice.