Design of a Domestic Controlled Voltage Stabilizer

Abstract

This paper aims to design a controlled voltage stabilizer to protect domestic appliances from voltage dips in electrical power distribution. Voltage dips are recurrent and become a concern for distributors and consumers. Voltage dips affect the power quality and can have a negative impact on the proper functioning of domestic appliances and other sensitive electronic equipment. Today, this problem has become central and recent measurements show that voltage dips can reach 35 to 40 % in some regions of Senegal. Therefore, this work is mainly focused on the design of a single-phase CVS, using control methodologies based on PI controllers that can effectively handle large voltage dips. The proposed controlled voltage stabilizer consists of a fully controlled AC-AC power converter, based on a single-phase boost rectifier connected to a single-phase PWM inverter with control laws. The design and the control laws adopted were carried out taking into account the characteristics of the electric power distribution, as well as the domestic loads. The robustness and effectiveness of the controlled voltage stabilizer are verified by carrying out simulations in the Matlab simulink environment in various operating cases using real measurements of voltages with different types of electrical loads. Simulation results confirm the effectiveness and robustness of the proposed stabilizer. Furthermore, it enables the protection of domestic appliances by keeping the voltage level stable within a specified range around the rated value regardless of voltage dips.