Design and Optimal Location of Power System Stabilizer in the Multi-Machine Power Network

Abstract

This paper proposes a damping torque index (DTI) to determine the optimal installation location of the power system stabilizer (PSS) in the multi-machine power network. The proposed index is based on the classical damping torque analysis (CDTA) method for power system low-frequency electro-mechanical (LFEO) analysis. The selection criteria of the PSS location is the maximum magnitude of DTI under normal operating conditions. The CDTA method is used to design PSS, and the phase compensation technique subsequently adjusts the associated parameters. Furthermore, to analyze the power system’s critical oscillation mode, a wide-area damping controller (WADC) is design for the synchronous generator where optimal location of PSS is install. The reduced-order model-based WADC includes time-varying delay in the wide-area signal. The WADC’s input signals from the phasor measurement unit (PMU) and the location of the PMU are selected using geometric measures of observability and WADC parameters design based on the residue approach. The proposed approach is validated in two separate test systems, and modal analysis is carried out on MATLAB software. The simulated results have been validated on the real-time digital simulator (RTDS) RSCAD 5.012. Results obtained on RTDS show that the proposed approach efficiently damps low-frequency electro-mechanical oscillations.

Keywords:

• Classical damping torque analysis
• Low-frequency electro-mechanical oscillation
• Multi-machine power network
• Phase compensation methodology
• PSS
• Wide-area damping controller

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Rohit Kumar

Rohit Kumar received the master's degree in electrical engineering from RGPV University, Bhopal India, in 2018. He is currently pursuing the PhD degree in electrical engineering at the Department of Electrical Engineering, IIT BHU. His primary research interests include power system dynamic and control, including energy storage systems, and renewable power generation. Corresponding author. Email: [email protected]

S. R. Mohanty

Soumya R Mohanty (Senior Member, IEEE) received the PhD degree from the Department of Electrical Engineering, Indian Institute of Technology (IIT) Kharagpur, India, in 2007. He is currently working as an associate professor with the Department of Electrical Engineering, Indian Institute of Technology (BHU), Varanasi. He had served more than 10 years as an assistant professor with the Department of Electrical Engineering, Motilal Nehru National Institute of Technology, Allahabad, India. He also worked as a postdoctoral fellow with University of Beira Interior, Portugal, and international research collaboration as Short Research Exchange Program under Science Foundation (SFI-ISCA) with the Dublin Institute of Technology, Ireland. He has published over 45 papers in international journals. His research area includes digital signal processing applications in power system relays and power quality, disturbance detection and classification, robust control scheme for load-frequency regulation in hybrid distributed generation based power system and microgrid, wide area monitoring and control in large scale power network. Email: [email protected]

M. K. Verma

MK Verma received his BSc (Engg) degree in electrical engineering from Regional Engineering College, Rourkela (presently National Institute of Technology, Rourkela), India in 1989, MSc (Engg) degree in electrical engineering from Bihar Institute of Technology, Sindri, India in 1994 and PhD degree in electrical engineering from Indian Institute of Technology (IIT), Kanpur, India in 2005. He is currently working as professor in the Electrical Engineering Department at Indian Institute of Technology (BHU), Varanasi, India. His current research interests include voltage stability studies, application of FACTS controllers, power quality, wide area monitoring system, and smart grid. Email: [email protected]