A Hybrid Grid-Wind Energy System Using Voltage Oriented Control and Class C Chopper For An Electric Charging Station
Maamar Taleb, Salwa Baserrah , Mohamed Amine Fnaiech, Khaled Zehar Department of Electrical and Electronics Engineering University of Bahrain P.O.Box 32038 – Sukhair Campus (Bahrain) 2025-07-25

Abstract

A shunt interconnection made from a wind drivenDC machine system, a three phase grid voltage supply, and a DC load representing an electric charging station is investigated The wind driven DC machine system participates with maximum power to the overall active power flow. It uses a class C chopper circuitry controlled properly by a typical maximum power point tracker (MPPT) controller. The grid has the role of supplying active power in case of any power deficiency needed by the DC electric charging station load. Similarly, it has also the role of absorbing active power in case of any additional power generated by the wind driven DC machine system and not needed by the DC load. This is done by using an AC/DC power electronic converter. Hence, the AC/DC power electronic converter should operate either under rectifier or inverter modes. The AC/DC power electronic converter is also operated under the next two conditions: 1-the reactive power expected at the grid voltage bus should be nearly null, 2-harmonics currents often encountered in the grid line currents waveforms should be tolerable. The two latter conditions are fulfilled by using the principle of voltage oriented control (VOC) technique. The performance of the investigated interconnection is simulated in Matlab/Simulink platform. Quite satisfactory results are obtained. The satisfaction about the obtained simulation results persists on being able to integrate easily the wind driven system with the AC grid while extracting maximum power from the wind energy system and having a unity power factor at the AC grid bus and less encountered harmonics in the ac line currents.

Key words: Grid-Tied Wind Energy system; AC/DC Converter; Class C Chopper; Maximum Power Point Tracker; Voltage Oriented Control.

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