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The IUP Journal of Electrical and Electronics Engineering

DVA Design for Wide Area Damping Control of Power System

Article Details

Pub. Date	: Oct, 2022
Product Name	: The IUP Journal of Electrical and Electronics Engineering
Product Type	: Article
Product Code	: IJEEE031022
Author Name	: Digvijay Nair
Availability	: YES
Subject/Domain	: Engineering
Download Format	: PDF Format
No. of Pages	: 12

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Abstract

The paper proposes a novel approach to fault tolerant control design of wide area damping controller for the power system. The design of a reconfigurable component called Dynamic Virtual Actuator (DVA) for effective and reliable wide area damping control action is presented. The design features of DVA include: (i) optimum control action during both nominal system condition and actuator faults; (ii) online calculation of the parameters of DVA in real-time on actuator faults; (iii) dynamic parameters of DVA that are function of the actuator faults; and (iv) it allows to continue to use controller, designed for nominal system condition even on actuator faults. The effectiveness of the design of DVA in damping of low frequency oscillations in power system is demonstrated. Kundur two-area power system model is considered for the design implementation of DVA. The results show successful damping of the oscillations on simulation of actuator faults in wide area control of the power system.

Introduction

This paper presents the design of a single dynamic reconfigurable component called Dynamic Virtual Actuator (DVA) for effective damping of oscillations in the power system using Wide Area Control (WAC). The classical design methods of H and H2 controls are used in the controller synthesis (Chaudhuri et al., 2003; and Deng et al., 2015). The designed controller is robust to changing operating points (mainly varying load) and network changes in the power system (Prasertwong et al., 2010; Supriyadi and Ngamroo, 2011; and Korba and Larsson, 2012). The controller is referred to as Robust wide area Damping Controller (RDC). The effectiveness of RDC is dependent on remote connections with actuators at different locations in the power system. Any large time-delays and loss of communication link between RDC and actuators are going to adversely affect controller performance. The RDC used here for damping of oscillations involves multiple actuators suitable for a large interconnected power system. To reduce the sensitivity of the controller to the remote links with actuators, a Fault Tolerant Control (FTC) design of wide area damping controller is developed here. In passive FTC designs, the main disadvantage is controller action suffering from conservative action due to the overdesign. In active FTC