Composite controller for a hybrid power plant based on PV array fed wind-driven induction generator with battery storage

Abstract

SUMMARYHybrid autonomous power plants based on wind-driven induction generators excited by a photovoltaic (PV) array has been recently found to be a reliable power source for remote locations. In such schemes, a composite controller for both maximum power point tracking and voltage control has not been attempted so far. Hence a dc-dc converter with a dual control strategy of peak power tracking when the battery is connected and in voltage control mode in the absence of the battery is proposed in this paper. The development of such a controller is also presented. A d-q axes model of the proposed scheme is given and the results of the simulation of the entire scheme are also presented. The battery charging and discharging regimes have been distinctly identified for variations in irradiations and shaft-torque conditions. Close proximity between the calculated peak power for different irradiations and the peak power observed from the simulated results brings out the significance of the proposed controller.

Control of energy in PVP/diesel system

“…Most of them emphasized on hybrid photovoltaic panel (PVP)/Wind/Battery systems [5][6][7], where wind energy is another source besides a PVP. In these hybrid systems, PVP and wind energy complement each other and the role of the battery is less important than in the PVP/Battery system.…”

Design and Implementation of Closed Loop LCL-T Resonant Dc-to-Dc Converter Using Low Cost Embedded Controller

“…At high wind speed, the electrical frequency increases and the reactive impedance of the generator will be high, while the impedance of the battery load will be low. In this case, the poor impedance matching will limit power transfer to the DC system (Yamamura et al, 1999;Borage, 2005;Daniel and Gounden, 2004;Arutchelvi and Daniel, 2006;2007).…”

“…Control of the DC-DC converter may be achieved by means of maximum power point tracking (Daniel and Gounden, 2004) or by means of a pre-determined relationship between wind speed and rectifier DC voltage (Arutchelvi and Daniel, 2006;2007). Maximum power point tracking requires continuous variation of the DC voltage to determine whether the output power may be increased.…”

Design Simulation of Cll Resonant Dc-To-Dc Converter for Stand Alone Wind Energy System

“…In this case, the poor impedance matching will limit power transfer to the DC system [3]. In response to these problems, researchers have investigated incorporating a DC -DC converter in the DC link [4]- [7]. While allowing a constant dc voltage to the load, a DC -DC converter will allow the voltage at the output of a diode bridge rectifier to be controlled.…”

“…Control of the DC-DC converter may be achieved by means of maximum power point tracking [5] or by means of a pre-determined relationship between wind speed and rectifier dc voltage [6], [7]. Maximum power point tracking requires continuous variation of the dc voltage to determine whether the output power may be increased.…”