Published October 30, 2017 | Version v1
Conference paper Open

Improved Transient Performance Properties of Distributed Generation Grid Side Converter Current Controller under Grid Voltage Harmonic Distortion and Unbalanced Faults

Authors/Creators

  • 1. Electrical Engineering Department, Frederick University
  • 2. KIOS Center of Excellence, University of Cyprus
  • 3. KIOS Center of Excellence, Department of Electrical and Computer Engineering, University of Cyprus

Description

The fast and accurate control of renewable energy grid side converter (GSC) under normal and abnormal grid conditions is necessary to ensure the injection of high quality power and to enhance the power system stability. Accurate control of GSC is achieved by the stable and fast response of current and PQ controllers. In the event that the grid voltage becomes unbalanced due to the presence of grid harmonics or due to an unbalanced fault, the GSC should respond in such a way so as to inject balanced and harmonic free currents. If the inverter continues to generate a balanced harmonic free three-phase voltage, the resulting current will be unbalanced and harmonically distorted. It is therefore necessary to modify the three-phase voltage of GSC in accordance to grid disturbances. This paper proposes a current controller that improves the transient performance of the injected currents in the event of grid voltage harmonic distortion and unbalanced grid faults. The proposed harmonic neutralization current controller can inject high quality and pure sinusoidal positive sequence current accurately with faster harmonic compensation and improved dynamic response

Notes

his work was supported by the Research Promotion Foundation (RPF, Cyprus, Project KOINA/SOLAR-ERA.NET/1215/06), by the Ministry of National Infrastructure Energy and Water (Israel) and the SOLAR-ERA.NET (European Union's Seventh Framework Programme). © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Z. Ali, L. Hadjidemetriou, N. Christofides, and E. Kyriakides, "A harmonic neutraliza-tion reference generator for fast and accurate mitigation of grid voltage harmonics affect-ing current controller," in Proc. IEEE IECON, Beijing, China, 2017, pp. 1-6. https://www.ieee.org/publications_standards/publications/rights/rights_policies.html

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Additional details

Funding

European Commission
KIOS CoE - KIOS Research and Innovation Centre of Excellence 739551