Using SVC to Economically Improve Transient Stability in Long Transmission Lines

ABSTRACT

The aim of this paper is to select the optimal size, location, and parameter setting of static var compensator (SVC) to improve power system stability in long transmission lines. Two objectives are considered in this paper to improve both the transient stability of the system and the SVC investment cost. In this study, the actual model of the long transmission line is considered to accurately determine the SVC location. By using the actual model of the line for long transmission lines, the SVC investment cost is reduced and the results have more accuracy than that found when the simplified model was used. In addition to placement of SVC for improving the system transient stability, an extra controller is used and adjusted to enhance the performance of the SVC. The problem is formulated as a form of multi-objective function and then multi-objective particle swarm optimization (MOPSO) is used to solve the problem and find the solution. In this research, results are presented as a set of responses to help the decision maker choose the appropriate response. A two-area test system with long transmission line is used to show the effectiveness and efficiency of the proposed method. The results of the non-linear simulation show that the optimum sizing, siting, and parameter setting of SVC can improve greatly the system's transient stability and reduce the SVC investment cost.

Keywords:

• Allocation
• Long transmission lines
• MOPSO
• SVC
• Transient stability

Additional information

Notes on contributors

Mohsen Gitizadeh

Mohsen Gitizadeh was born in February, 1976 in Iran. He received his BSc degree in electrical engineering from Shiraz University in 1999, and his MS and PhD degrees from Iran University of Science and Technology in 2001 and 2009, respectively. He is currently an assistant professor in the Department of Electrical and Electronics Engineering at Shiraz University of Technology in Shiraz, Iran. His current research interests are in the areas of power system operation and control, voltage stability and optimization, demand side management, and FACTS devices.

E-mail: [email protected]

Sahand Ghavidel

Sahand Ghavidel was born in Rasht, Iran. He received BSc degree from the University of Mehrastan in electrical engineering in 2010. He is an MSc student at Shiraz University of Technology. He is currently working on power system transient stability, applications of FACTS devices in power system stability improvement, and multi-objective placement of these devices in large power systems with evolutionary algorithms.

E-mail: [email protected]

Jamshid Aghaei

Jamshid Aghaei obtained his BSc degree in electrical engineering from the Power and Water University of Technology, Iran, in 2003 and his MSc and PhD degrees in electrical and power engineering from Iran University of Science and Technology in 2005 and 2009, respectively. His research interests are in the application of FACTS devices and power markets, power system operation, and restructuring and application of optimization in power system studies. His employment and research experience includes power system operation and planning; renewable energy and micro-grid power systems; and application of optimization in power systems issues.

E-mail: [email protected]