Effect of TCSC on Chaotic Ferroresonant Oscillations in Voltage Transformer

ABSTRACT

Ferroresonance is one of the complex phenomena that occur in power system. This can create thermal and insulation problems for power system equipment. It can also cause chaotic oscillations in the power system. One of the factors that influences on the occurrence of ferroresonance in the capacitor voltage transformers (CVTs) is the magnitude of transmission line capacitor. To study the ferroresonance nonlinear dynamics, in this paper, the chaos theory is used. By using this theory, changes in system parameters which cause chaotic ferroresonant oscillations can be better reviewed and analysed. Thyristor-controlled series capacitors (TCSCs) are used for series compensation in the transmission line. Behaviour of the system in ferroresonance occurrence, with TCSC, is shown in bifurcation and phase plane diagrams. By using these diagrams, behavioural changes of the system can be easily seen in this case. The results show that TCSCs lead increasing of ferroresonance in CVT.

Keywords:

• Bifurcation
• Capacitor voltage transformer (CVT)
• Chaos
• Ferroresonance
• Nonlinear dynamics
• Thyristor-controlled series capacitors (TCSCs)

PACS:

• 76.50.+g
• 52.59.Mv
• 84.40.Az
• 84.60.Ve
• 05.45.–a

Additional information

Notes on contributors

H. R. Abbasi Fordoei

Hamid Reza Abbasi received his BS degree in electrical engineering from Tehran University, Iran, in 2009, and his MSE degree in electrical engineering from Iran University of Science and Technology (IUST), Tehran, Iran, in 2011. Currently, he is pursuing his PhD at the Electrical Engineering Department of IUST, Tehran, Iran. His research interests are in the application of artificial intelligence to power system control design, analysing chaos in power systems, and chaos control in power systems.

E-mail: [email protected]

A. Gholami

A. Ghoalmi received his BS degree in electrical engineering from IUST, Tehran, Iran, in 1975, and his MSE and PhD degrees in electrical engineering from UMIST, Manchester, UK, in 1986 and 1989, respectively. He is currently an associate professor in the Electrical Engineering Department, IUST, Tehran, Iran. His main research activities are high voltage engineering, electrical insulation, insulation coordination, transmission lines, and substations planning.

Email: [email protected]

S. H. Fathi

S. Hamid Fathi received his BSc and MSc degrees in electrical engineering from Amirkabir University of Technology (AUT), Tehran, Iran, and IIUST, Tehran, Iran, in 1984 and 1987, respectively. He gained his Ph.D. degree in electrical engineering from the University of Newcastle-Upon-Tyne, UK, in 1991. Then, he joined AUT and currently he is an associate professor at the Electrical Engineering Department of AUT. His research interests include power quality, flexible ac transmission systems (FACTS), power electronics, and electric drives.

Email: [email protected]

A. Abbasi

Ataollah Abbasi received his BS and MSE degrees in electrical engineering from Shahed University, Iran, in 2005 and 2008, respectively. Currently, he is pursuing his PhD in electrical engineering at the Electrical Engineering Department of AUT, Tehran, Iran. His research interests are in the application of artificial intelligence to power system control design, analysing chaos in power systems, analysing resonance and ferroresonance phenomena, and chaos control in power systems.

Email: [email protected]