Design and simulation of a voltage-control system with a controllable reactor of transformer type

A controllable reactor of transformer type (CRT), which is a novel equipment to compensate the capacitive reactive power and keep the voltage stabilization of a transmission network, possesses such advantages as smooth power regulation, low current harmonic content, and fast response. By resolving the equations of a single-phase lossless transmission line, the relationship between the line voltages, the line length, the load and the compensation degree is analyzed. A control system of the line voltage with a CRT is designed employing the dynamic reactive power compensation theory and utilizing the engineering design method. Then the simulation model is constructed by MATLAB/PSB. The simulation results demonstrate that the voltage-control system can rapidly regulate the output power of a CRT, and can keep the line voltage stabilization while the transmitted power might change.