Autonomous operation of wind-battery hybrid power system with maximum power extraction capability

Abstract

The hybrid operation of a remote area power system consisting of a Doubly Fed Induction Generator (DFIG) based wind turbine, a battery storage unit and a dummy load is investigated in this paper. The battery storage unit operates as a source or load, depending on the wind power output and loading conditions of the system. The battery storage is connected to the AC side of the wind energy system through a three phase inverter to supply both active and reactive power. A dummy load is also incorporated into the AC side of the system. The design criteria of the controllers for each component (ie. DFIG, battery storage system and dummy load) and an approach for control coordination of the entire system are presented in this paper. The suitability of the proposed control coordination strategy and individual system controllers are tested in relation to the system voltage, frequency and DC link stability of the DFIG under variable wind and changing load conditions. The maximum power extraction capability from wind is also achieved throughout the operation. Abstract-The hybrid operation of a remote area power system consisting of a Doubly Fed Induction Generator (DFIG) based wind turbine, a battery storage unit and a dummy load is investigated in this paper. The battery storage unit operates as a source or load, depending on the wind power output and loading conditions of the system. The battery storage is connected to the AC side of the wind energy system through a three phase inverter to supply both active and reactive power. A dummy load is also incorporated into the AC side of the system. The design criteria of the controllers for each component (ie. DFIG, battery storage system and dummy load) and an approach for control coordination of the entire system are presented in this paper. The suitability of the proposed control coordination strategy and individual system controllers are tested in relation to the system voltage, frequency and DC link stability of the DFIG under variable wind and changing load conditions. The maximum power extraction capability from wind is also achieved throughout the operation.Index Terms-Doubly fed induction generator, Battery storage system, Dummy load and Maximum power extraction.

Smoothing Control of Doubly-Fed Induction Generator Wind Turbine under Different Wind Conditions

“…Wu et al [3] investigated the improved control strategy for both the rotor side converter (RSC) and grid side converter (GSC) of a DFIG wind turbine system which improves the low voltage ride through capability. Mendis et al [4][5][6] presented an energy management strategy for a wind dominated remote area power supply system. The battery storage was connected to the AC side of this system using a three phase inverter, and dummy load and main loads are included in their model.…”

Frequency regulation by fuzzy and binary control in a hybrid islanded microgrid

“…Other studies in the literature opted for calculating the system real power mismatch [5,[8][9][10]. The power mismatch estimates the difference between wind power production and load consumption.…”

“…Studies in [9] and [10] balanced the power mismatch in order to extract maximum power from the wind turbine. However, the power mismatch calculation is again required to decide whether the DL is committed.…”