Nonlinear Resonance Suppression as Distorting and Saturating Source in Voltage and Current of Power Transformer: UPFC and STATCOM Performance Evaluation

Abstract

Non linear resonance usually resonates in network which is consisting of ferromagneticcore. When distributed capacitance calculated form circuit breaker; mainly circuit breaker and cablecapacitance; after switching and opening the network feed apparatus, magnetization current on ferromagnetic core jump to saturation. Duration of ferroresonance is deeply relying on capacitance, and itwill be decaying by disembarking total store energy. Although, ferroresonance commence by switching circuit breaker off; protecting relay and other protecting schemes have no reaction, because thelast protection step for saving a device is a circuit breaker. There is no reported method to mitigatedisruptive phenomenon; which elder publication focus on the explosion of capacitive transformer,melting of power transformer core lamination and arresters problem. This work is tried to dampingferroresonance and reducing devastation effect on the apparatus. While, protecting devices is useless,fault point topology mutating by FACTS to control and decrease this phenomenon. FACTS deviceis settled at the upstream of apparatus to improve power quality, is switched on at initiating momentresonating. Modeling and simulating of ferroresonance are done by the actual value of transformerand other power system related devices extracted by UTM-TNB.

Key findings

• ▸Ferroresonance can occur in power transformers due to distributed capacitance and magnetization current on ferromagnetic cores.
• ▸Protecting devices are ineffective in preventing ferroresonance, and FACTS devices can be used to control and decrease the phenomenon.
• ▸The proposed method using UPFC and STATCOM can effectively damp ferroresonance and reduce its devastating effects on apparatus.

Keywords

Identifiers

DOI

10.4028/www.scientific.net/amm.818.79

Journal

Applied Mechanics and Materials

Year

2015