Modeling and Simulation of Reactive Power Control of Wind-Diesel Hybrid System

Sandeep Yadav Mukhtiar Singh Mohan Student of M.tech power system. in D.C.R.U.S.T Murthal. Assistant Prof. in D.C.U.R.S.T Murthal. Assistant Prof., ABESIT Ghaziabad. Abstract-This paper presents a wind-diesel hybrid system with controllers is taken for controlling main parameters of the system frequency and voltage, which determine the stability and quality of the supply. Voltage mismatch is the sole indicator of reactive power unbalance in the system. In this paper work a step disturbance is applied to wind-diesel system which disturbs the system frequency and voltage. Therefore a thorough investigation on wind-diesel hybrid system has been performed under stepped disturbance. First we have considered a IEEE type-I excitation system connected to wind-diesel hybrid system for controlling the terminal voltage of the system which is found insufficient for proper voltage control. A better control of the terminal voltage is obtained. However SVC is considered to be more efficient in meeting out any sudden change in reactive power demand and a better control of terminal voltage easily obtained. Mainly three types of SVC type-I, type-II and type-III systems have been thoroughly studied and simulated. Finally we compare the performance of SVC type-I, SVC typeII, SVC type-III it can be seen that the performance of SVC Type-II is best in comparison to SVC Type-I and SVC Type-III system. Index term: Diesel generator (D.G) set, induction generator (I.G), reactive power control, static var compensator (S.V.C), wind diesel hybrid system, synchronous generator (S.G) and Wind energyconversion system. NOMENCLATURE.