ANALYSIS OF VARIOUS COMPENSATION DEVICES FOR POWER QUALITY IMPROVEMENT IN WIND ENERGY SYSTEM

In recent trend, the renewable source of energy is increasingly used in the electric power generation, which leads to certain power quality issues. Hence some of the supplementary devices like capacitors, compensators or reactive power injection devices are added to the compensation system. With the advancement in power electronics, compensating devices such as Distribution Static Compensator (DSTATCOM), Unified Power Quality Conditioner (UPQC), Dynamic Voltage Restorer (DVR), Static Var Compensator (SVC) etc. are used. In this paper, the characteristics of three important compensating devices DVR, UPQC and DSTATCOM are analysed. Initially these devices are modelled and their performance is analysed with common power quality problems such as voltage sag, swell and harmonics. The overall outcome suggests that the performance of the DSTATCOM is comparatively better than that of the other two devices, which become the most suitable device for power quality improvement in wind energy system.