Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 2

intelligent electronic device Related Abstracts

2 Applying Wavelet Transform to Ferroresonance Detection and Protection

Authors: Jyh-Cherng Gu, Ming-Ta Yang, Chun-Wei Huang

Abstract:

Non-synchronous breakage or line failure in power systems with light or no loads can lead to core saturation in transformers or potential transformers. This can cause component and capacitance matching resulting in the formation of resonant circuits, which trigger ferroresonance. This study employed a wavelet transform for the detection of ferroresonance. Simulation results demonstrate the efficacy of the proposed method.

Keywords: Wavelet Transform, transformer, ferroresonance, intelligent electronic device

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1 Application of IED to Condition Based Maintenance of Medium Voltage GCB/VCB

Authors: Jyh-Cherng Gu, Ming-Ta Yang, Jin-Lung Guan, Chun-Wei Huang

Abstract:

Time base maintenance (TBM) is conventionally applied by the power utilities to maintain circuit breakers (CBs), transformers, bus bars and cables, which may result in under maintenance or over maintenance. As information and communication technology (ICT) industry develops, the maintenance policies of many power utilities have gradually changed from TBM to condition base maintenance (CBM) to improve system operating efficiency, operation cost and power supply reliability. This paper discusses the feasibility of using intelligent electronic devices (IEDs) to construct a CB CBM management platform. CBs in power substations can be monitored using IEDs with additional logic configuration and wire connections. The CB monitoring data can be sent through intranet to a control center and be analyzed and integrated by the Elipse Power Studio software. Finally, a human-machine interface (HMI) of supervisory control and data acquisition (SCADA) system can be designed to construct a CBM management platform to provide maintenance decision information for the maintenance personnel, management personnel and CB manufacturers.

Keywords: intelligent electronic device, circuit breaker, condition base maintenance, time base maintenance, SCADA

Procedia PDF Downloads 188