[This article belongs to Volume - 54, Issue - 02]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-17-08-2022-287

Title : VOLTAGE SAG ENHANCEMENT OF GRID CONNECTED HYBRID PV WIND SYSTEM USING BATTERY BASED AND DYNAMIC VOLTAGE RESTORER
P. Manohar, P. Shyam Kiran

Abstract :

The three-phase injection transformer or three single-phase injection transformers comprising the primary supply will be used by the series-connected DVR to inject three-phase compensating voltages. The injection transformer raises the filtered VSI output voltage to the required value. The transformer additionally separates the DVR circuit from distribution network. The DVR's design heavily depends on the voltage source inverter's (VSI) capacity and the link filter's values, which connect the injection transformer as well as the inverter. In this study, a new Dynamic Voltage Restorer (DVR) topology has been developed. Voltage harmonic, surge, and sag mitigation can be improved due to the modest capacity of the voltage source inverter (VSI) and the values of the link filter. Using the new RLC filter, switching harmonics can be eliminated. Reduced dc supply voltage capacity is caused by low inductance. With the new DVR structure, the voltage quality can be improved and efficiency can be maximized at the same time. The model-specific RLC filter parameter architecture was described. MATLAB is used to develop and simulate the new DVR with the suggested controlled DVR topology. The control strategy offers a low transient current overshoot and good control dynamics. This is a nice outcome for transient performance simulations. The closed loop controller of the proposed circuit is emulated using fuzzy logic.