Abstract
In order to improve the voltage control techniques, an advanced scheme based on a thyristor-controlled FACTS device-namely SVC is introduced in this thesis. Static Var Compensator(SVC) based on Thyristor Controlled Reactor(TCR) has good compensation-performance for rapid changing load, so it has become a hotspot in recent years. The SVCs are so effective that they have been used widely and likely to be selected for new applications. This systems, thesis is focused primarily on various components of SVC control and protection as well as the operating principles and the control techniques of voltage regulation for SVC's controllers. Magnetic valve controllable reactor is a newly reactive power compensation device. It has an approximate linear A-V characteristic，less harmonics and relative less response time. It is the first device in the area of voltage regulation and reactive power compensation. This paper presents a controller with an Single Chip Microcomputer as the core. It consists of measure circuit, control circuit, trigger circuit, keyboard, display circuit and communicating circuit. The measuring circuit is to measure the secondary voltages and 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. Finally, the paper introduces the software and hardware realization of the device. On this hardware platform, automatic control of the equipment is realized by programming in the C language.
