Efficient Management of Energy Transfer in Wind Generator Using Hybrid Power System M.John sreenivasa Rao*, T.Amar Kiran** *(Department of Electrical & Electronics Engineering, P.G.student, Godavari Institute of Engg. and Technology, Rajahmundry. **( Department of Electrical & Electronics Engineering, Associate Professor, Godavari Institute of Engg. and Technology, Rajahmundry. ABSTRACT Growing concerns over environmental damage from fossil-fired power stations has led to a desire to use large amounts of renewable energy. Dominant forms such as wind power and solar power are highly variable. Indeed, to absorb all fluctuations of the wind generator. The generated power does not depend on the grid requirement but entirely on the fluctuant wind condition. This paper presents a maximum power point tracking (MPPT) technique for high-performance wind generators. A dc-coupled wind/hydrogen/super capacitor hybrid power system is studied in this paper. The purpose of the control system is to coordinate these different sources, especially their power exchange, in order to make the generated power smooth and controllable. As a result, an active wind generator can be built to provide some ancillary services to the grid. The control system should be adapted to integrate the power management strategies. Two power management strategies are presented and compared experimentally. The effectiveness of this strategy lies in its ability to control the frequency bands. We found that the “source-following” strategy has better performances on the grid power regulation than the “grid-following” strategy. Key words—Distributed power, energy management, hybrid power system (HPS), power control, wind generator (WG). 1. INTRODUCTION Renewable energy sources (RES) and distributed generations (DGs) have attracted special attention all over the world in order to reach the following two goals: 1) the security of energy supply by reducing the dependence on imported fossil fuels; 2) the reduction of the emission of greenhouse gases (e.g., CO2) from the burning of fossil fuels. Other than their relatively low efficiency and high cost, the controllability of the electrical production is the main drawback of renewable energy generators, like wind turbines and photovoltaic panels, because of the uncontrollable meteorological conditions [1]. In consequence, their connection into the utility network can lead to grid instability or even failure if they are not properly controlled. Moreover, the standards for interconnecting these systems to the utility become more and more critical and require the DG systems to provide certain services, like frequency and voltage regulations of the local grid. Wind power is considered in this paper. Wind energy is the world’s fastest growing energy source [2]. However, classical wind energy conversion systems work like passive generators. Because of the intermittent and fluctuant wind speed, they cannot offer any ancillary services to the electrical system in a micro grid application, where stable active- and reactive-power requirements should be attributed to the generators. As solutions, hybrid power systems (HPS) are proposed to overcome these problems with the following two innovative improvements. 1) energy storage systems are used to compensate or absorb the difference between the generated wind power and the required grid power [3]–[6]. 2) Power management strategies are implemented to control the power exchange among different sources and to provide some services to the grid [7]–[9]. International Journal of Engineering Research & Technology (IJERT) Vol. 1 Issue 7, September - 2012 ISSN: 2278-0181 1 www.ijert.org