Extensive Application of UPQC-L for a Dual Point of Common Coupling System with Multiple Loads under Unbalanced Source Condition

Abstract

Abstract—This paper presents a synchronous reference frame (SRF)-based power angle control (PAC) approach for a specific unified power quality conditioner (UPQC) arrangement, termed as UPQC-L for dual point of common coupling system under unbalanced source voltage condition. In contrast to a conventional configuration of UPQC, the static compensator (STATCOM) part is on left side of UPQC-L, while dynamic voltage restorer (DVR) is on the right side. The UPQC-L configuration is specifically adapted for protection of sensitive and critical load types from voltage disturbances. Along with its basic compensation capability of current harmonic compensation and voltage compensation, it efficiently handles reactive power demand from sensitive load. This is achieved with the introduction of PAC concept for effective sharing of reactive power between STATCOM and DVR. The extraction of instantaneous power angle faces difficulty with unbalanced voltage and UPQC-L configuration. Thus, the control algorithm for UPQC-L is designed based on SRF and numerical analysis approach with equal reactive power sharing phenomena by STATCOM and DVR of UPQC-L. UPQC-L with the proposed control approach is successfully implemented in MATLAB/SIMULINK (The Mathworks, Inc. USA) and verified experimentally for mitigation of voltage disturbances (such as sag/swell, unbalancing, and harmonics), current harmonics, and high-reactive power demand.

Keywords::

• unified power quality conditioner
• power angle control
• harmonic compensation
• reactive power compensation
• synchronous reference frame
• unbalanced voltage

Additional information

Notes on contributors

Nishant Patnaik

Nishant Patnaik received the B.Tech. degree in electrical engineering from BIT Durg, India and the M.Tech. degree in power electronics and drives from Kalinga Institute of Industrial Technology, Bhubaneswar, India, in 2006 and 2009, respectively. He is currently working toward the Ph.D. degree in the National Institute of Technology Rourkela, India. His research interests include power quality improvement and application of power electronics with non-conventional energy sources.

Anup Kumar Panda

Anup Kumar Panda received the B.Tech. degree in electrical engineering from Sambalpur University, India, the M.Tech. degree in power electronics and drives from the Indian Institute of Technology, Kharagpur, India and the Ph.D. degree from Utkal University in 1987, 1993, and 2001, respectively. In 1990, he joined as a Lecturer in IGIT, Sarang, served there for 11 years, and then in January 2001 joined the National Institute of Technology, Rourkela as an Assistant Professor, where he is currently working as a Professor in the Department of Electrical Engineering. He has published more than 100 articles in several journals and conferences. He is a Fellow of the Institute of Engineering and Technology UK, the Institute of Engineers India, and the Institute of Electronics and Telecommunication Engineering. He is also Senior Member of IEEE. His research interests include design of high-frequency power conversion circuits and applications of soft computing techniques, improvement in multilevel converter topology, power factor improvement, and power quality improvement in power system and electric drives.