On-line supervision of transformer on-load tap changer

Gil, W.; Grzybowski, Wlodzimierz; Wronek, Przemysław

doi:10.1109/ichve.2010.5640785

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…TORING WITH POWER NETWORK UNBALANCE CORRECTION of bushing monitoring systems operating in Poland, a power network unbalance correction has been [4]. In the monitoring system, denoted as MM in Fig.…”

Section: Monitoring With Power Network Unbalance Correctionmentioning

confidence: 99%

Measurement uncertainty in on-line bushing monitoring

Gil,

Masłowski

2024

joe

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The high voltage bushing on-line monitoring has been performed for many years to prevent unexpected rapid power network failures. Network unbalance correction, based on separate voltage phase measurement or phasor technique, effectively improves the measurements of bushing dielectric dissipation factor tgδ and capacitance factor C1. The newly implemented monitoring units reveal that the uncertainty of station voltage measuring transformers manifest the greatest influence on the overall uncertainty budget, regardless of the measurement method.

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Section: Monitoring With Power Network Unbalance Correctionmentioning

confidence: 99%

Measurement uncertainty in on-line bushing monitoring

Gil,

Masłowski

2024

joe

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“…pattern of motor power registered for new LTC mechanism. The comparison is usually done in terms of maximum values, time need to complete the sequence and presence of abnormal patterns [7]. …”

Section: Monitoring Of Oltc Driving Motor Parametersmentioning

confidence: 99%

Possibility of using acoustic emission method for testing load tap changers during normal operation of the transformer

Cichoń

Berger

2014

2014 ICHVE International Conference on High Voltage Engineering and Application

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High voltage power transformers are one of the most important devices in modern electrical grids. Power transformers are directly responsible for continuous power supply as they are located in crucial points of electrical energy transmission and distribution system. This fact makes maintenance of such a transformer especially important. In order to properly manage reliability of those significant devices proper routines are required but constant increase in power demand makes turning off and inspection increasingly difficult. This causes that in many situations diagnostic procedures must be performed during operation of transformer. The only component of transformer with moving parts is Load Tap Changer (LTC). It is a mechanism responsible for changing transformers turn ratio, thus regulation of voltage on its terminals. L TCs are one of the most defective elements of transformers. About 40% of transformers malfunctions are associated with them. This made LTCs diagnostics important subject of study. In the following paper insight on modern methods used to determine technical condition of LTCs is presented. Much attention is paid to description of capable on-line diagnostic technique based on acoustic emission generated by device. Results of laboratory experiments in this field are given. Experiments were performed on industrial class, oil filled, LTC. Finally, paper presents acoustic emission fingerprint of LTC installed in new 400 kV power transformer.

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On-line supervision of transformer on-load tap changer

Cited by 2 publications

References 1 publication

Measurement uncertainty in on-line bushing monitoring

Measurement uncertainty in on-line bushing monitoring

Possibility of using acoustic emission method for testing load tap changers during normal operation of the transformer

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