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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Direct power control of grid connected voltage source converters

Xu, L. and Zhi, D. and Yao, L. (2007) Direct power control of grid connected voltage source converters. In: IEEE Power Engineering Society General Meeting, 2007., 2007-06-24 - 2007-06-28.

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Abstract

This paper proposes a new direct power control (DPC) strategy for grid connected voltage source converters (VSC). Similar to an electrical machine, source and converter flux are defined as the integration of the source and converter voltage respectively. Based on the defined flux, the proposed DPC scheme directly calculates the required converter voltage to eliminate the active and reactive power errors within each fixed time period. Thus, no extra power or current control loops are required, thereby simplifying the system design and improving transient performance. Constant converter switching frequency is achieved using space vector modulation which eases the design of the power converter and the AC harmonic filter. Simulation results for a 2 MW VSC system are provided to demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power and AC voltage dip.