On Control Schemes of Voltage Source Converters

TL;DR

This paper reviews control schemes for voltage source converters that maintain stability and robustness under abnormal conditions like parameter variations, grid weakness, and dc-bus fluctuations.

Contribution

It provides a comprehensive overview of recent control methods tailored for abnormal operating conditions in voltage source converters.

Findings

Control schemes demonstrate robust performance under abnormal conditions.

Methods effectively handle parameter variations and grid instability.

Enhanced stability in ac-dc converters during abnormal scenarios.

Abstract

This paper discusses some aspects of control schemes for voltage source converters under abnormal conditions. The control schemes are developed specifically for the situations when one or more system parameters vary significantly to the extent that the system becomes unstable with a conventional controller. The paper will present some recent works on control of grid-interactive converters for parameter variations in weak grid. The paper will also discuss some methods under abnormal dc-bus variation. Finally, the paper focuses on the control schemes suitable for ac-dc converters that addresses input frequency, voltage and load variation. All the discussed control schemes have shown robust performance under abnormal conditions.