Experimental Validation of Improved Control Strategy of Grid-interactive Power Converter for Wind Power System

Abstract

In this paper grid-voltage oriented control of gridside converter for wind power system is presented, which aims to optimize the performance of utility grid during transient conditions. To realize this objective, a digitally controlled inverter system is implemented which provides independent control of active and reactive power delivered to the grid under sudden change in reactive load. Initially, the proposed grid-voltage oriented control scheme is analyzed in order to manage the power flows into the grid followed by the mathematical modelling of grid-side converter. And then, a closed-loop control structure of the grid-side converter is implemented using a conventional proportional integral (PI) controller with space vector pulse width modulation (SVPWM) current controller. In order to analyze the results of the proposed study, in this paper, the complete system is modelled and simulated in the MAT-LAB/Simulink environment and the numerical results are discussed. The experimental results, obtained using DSP TMS320F2812 processor, confirm the high performance of the proposed control system in terms of good sinusoidal grid current, low harmonic content and fast dynamic response.

Modelling and Control of a VIENNA Smart Rectifier-I for Wind Power Systems Integrated Under Transient Conditions

“…Due to the increased demand of electricity nowadays, the world is moving towards the use of renewable energy sources because of high efficiency, resource availability, cost competitiveness and environmental adequateness. In this respect, recent researches have been developed towards the improvement of renewable energy technology [1][2][3]. In fact, for an AC collection grid, each wind energy conversion system (WECS) on a WPP includes: a windturbine plus mechanical parts (e.g.…”

“…The DC technology has acquired significant applications in modern distribution systems due to the high penetration levels of DC loads and DC-based distributed generators (DGs) [1]. Unlike conventional AC distribution systems, DC distribution systems have high penetration level of power converters used to interface both DGs and loads [2]. HVDC power transmission and distribution systems have received wide acceptance in power systems and renewable energy resources integration technology.…”

“…However for the variable speed wind-turbine, power electronic converter is employed in the WECS circuit. DFIG and PMSG are the most considered type of generators for the WECS based variable speed windturbine synchronous generators, for many advantages, they can supply constant load for the power consumers, and also can monitoring the power rapidly and flexibly with the help of active power electronic convertors [2,3]. One of the major challenge in WECS is to handle the discontinuity of wind and to protect the grid stability.…”