Power-Angle Synchronization for Grid-Connected Converter with Fault Ride-Through Capability for Low Voltage Grids

Abstract

In this paper, the power angle synchronization control of a grid-tied bidirectional dc-ac converter is investigated for low voltage grids. The power flow equations for the low voltage grid are analyzed and compensators are designed to ensure the decoupled control of active and reactive power. The proposed control system operates without the need for a phase locked loop during balanced and unbalanced grid conditions. It is shown that during balanced conditions the compensators ensure stable operation controlling the desired power flow to and from the grid. It is also demonstrated that the compensators are immune to grid fluctuations and to a large extent can cater grid unbalanced conditions. Experimental results verify the performance of the proposed control scheme.

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Intelligent Systems Center

Keywords and Phrases

Bi-Directional Power Flow; Fault Ride Through; Grid-Connected Converter; Load Flow; Low Voltage; Low Voltage Grid; Mathematical Model; Phase Locked Loops; Power-Angle Synchronization; Proportional Resonant Controller; Reactive Power; Synchronization; Voltage Control

International Standard Serial Number (ISSN)

0885-8969; 1558-0059

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Sep 2018

Link to Full Text

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