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- Title
Influence of Transient Overvoltage in a High-Voltage System During Shunt Reactor De- Energization.
- Authors
Al-Tak, Mazyed A.; Ain, Mohd Fadzil Bin; Al-Yozbaky, Omar Sh.; Jamil, Mohamad Kamarol Mohd
- Abstract
This study investigates transients resulting from switching a three-phase 400 kV shunt reactor. The main concern is the occurrence of current chopping during the de-energization of the shunt reactor, which can lead to overvoltages and stress on circuit breakers and the shunt reactor itself. When clearing a ground arcing fault, a neutral Earthing reactor aids in interrupting the current. Switching a grounded shunt reactor via a neutral reactor may stress circuit breakers more than switching a solidly grounded shunt reactor. This study proposes a novel circuit modification to suppress excessive transient overvoltages due to current chopping during shunt reactor de-energization. The proposed modification involves integrating an additional circuit breaker and its inherent resistance into the existing circuit. Utilizing ATP-Draw software, the study models and analyzes transient behavior specifically for a 50 MVAR reactive power rating. Different mitigation techniques, including controlled switching, surge arresters, disconnecting switches, and a novel circuit modification model, are compared based on simulation results. A new model for de-energizing shunt reactors is presented in this study, achieving significant reductions in transient voltages on both the reactor and circuit breaker compared to traditional models. This model focuses on optimized synchronization between circuit breakers, leading to an 84% voltage drop, highlighting the significant advantages of this approach.
- Subjects
SHUNT electric reactors; OVERVOLTAGE; ELECTRIC potential; REACTIVE power; ELECTRIC transients; CEREBROSPINAL fluid shunts
- Publication
Journal Européen des Systèmes Automatisés, 2024, Vol 57, Issue 1, p167
- ISSN
1269-6935
- Publication type
Article
- DOI
10.18280/jesa.570117