Optimal Localization and Sizing of UPFC to Solve the Reactive Power Dispatch Problem Under Unbalanced Conditions

Abstract

This paper presents an algorithm to solve the multi-objective Optimal Reactive Power Dispatch (ORPD) problem in an unbalanced bus system. Unlike the traditional ORPD problem, loadability maximization, voltage profile enhancement, loss minimization, and ATC enhancement are achieved under unbalanced conditions. Here, ORPD is effectuated through determining the optimal location and size of the UPFC using a hybrid version of GA and FF. Experimental results on the benchmark IEEE test bus systems demonstrate the ORPD performance of the proposed algorithm over the traditional algorithms, under unbalanced conditions. Moreover, the proposed algorithm is proved for its performance in maintaining a better trade-off among multiple objectives, even under overloading conditions. The analysis also includes an investigation on the sensitivity of the algorithm against the overloading conditions of the bus system. Finally, the experimental results confirm that the proposed algorithm is superior to the conventional algorithms like GA, PSO, a hybrid version of GA-PSO, and the traditional FF algorithm.

Abbreviations: ATC: Available Transfer Capability; CMAES: Covariance Matrix-Adapted Evolutionary Strategy; CPF: Continuation Power Flow; DE: Differential Evolution; FACTS: Flexible AC Transmission System; FF: Firefly Algorithm; GA: Genetic Algorithm; GSA: Gravitational Search Algorithm; KHA: Krill Herd Algorithm; LSI: Loss Sensitivity Index; NSGA-II: Non-Dominated Sorting Genetic Algorithm-II; OKHA: Oppositional Krill Herd Algorithms; ORPD: Optimal Reactive Power Dispatch; PSO: Particle Swarm Optimization; UPFC: Unified Power Flow Controller; VDI: Voltage Deviation Index

KEYWORDS:

• ATC
• FF
• ORPD
• Unbalanced
• UPFC

Additional information

Notes on contributors

Shilpa S. Shrawane Kapse

Shilpa S Shrawane Kapse received the BE degree in electrical engineering from Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, India, in 1998, the ME degree in electrical power systems from Government College of Engineering, Amaravati, India, in 2004. Currently, she is pursuing the PhD degree in electrical engineering from G. H. Raisoni College of Engineering, Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, India. She is working as Assistant Professor at Lokmanya Tilak College of Engineering, Navi Mumbai, India. Her research interests include optimal reactive power dispatch, power systems optimization, FACTs devices, and Artificial Intelligent techniques. Ms. Shilpa is IEEE Branch Counselor, LTCE branch, IEEE Region 10, Bombay Section and a Life member of the Indian Society for Technical Education. Corresponding author. Email: [email protected]

Manoj B. Daigavane

Manoj B Daigavane received the BE degree in power electronics engineering from Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, India, in 1988, the MS degree in electronics and control engineering from the Birla Institute of Technology and Science, Pilani, India, in 1994, the ME degree in power electronics engineering from Samrat Ashok Technological Institute, Vidhisha, RGPV Bhopal, India, in 2001, and the PhD degree in electrical engineering Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, India, in 2009. Currently, he is the Principal of G. H. Raisoni Institute of Engineering and Technology, Nagpur. His current research interests include resonant converters, power quality issues, power system protection, DSP applications and power electronics for motor drives. Dr. Daigavane is a Member of the Institution of Engineers, India, and a Life member of the Indian Society for Technical Education. Email: [email protected]

Prema M. Daigavane

Prema M Daigavane received the BE degree from Government College of Engineering, Amaravati, India, in 1988, the MS degree in electronics and control engineering from the Birla Institute of Technology and Science, Pilani, India, in1996 and the PhD degree from Rashtrasant Tukdoji Maharaj Nagpur University, Nagpur, India, in 2013. Currently she is a Professor and Head of the Department of Electrical Engineering, G. H. Raisoni College of Engineering, Nagpur, where she is involved in teaching and research work. Her current research interests include MATLAB applications, fuzzy logic and image processing. Dr Daigavane is a Member of the Institution of Engineers, India, and a Life member of the Indian Society for Technical Education. Email: [email protected]