Frequency response analysis for transformer tap changer damage detection

Al-Ameri, Salem Mgammal; Alawady, Ahmed Allawy; Yousof, Mohd Fairouz Mohd; Ahmad, H.; Salem, Ali Ahmed; Talib, Mohd Aizam

doi:10.11591/ijpeds.v11.i1.pp350-358

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…Oil-immersed tap changer is usually subjected to coking process due to the formation of carbonaceous deposits. In a transformer, this process occurs when carbon is extracted from the surrounding transformer oil and deposited on the tap changer contacts due to the heating process during tap position change [15][16][17][18]. In this paper, this process was achieved by heating the tap changer contacts to a high-temperature level.…”

Section: Coking Formulationmentioning

confidence: 99%

Application of Frequency Response Analysis Technique to Detect Transformer Tap Changer Faults

et al. 2021

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Power transformers are located in the electrical transmission and distribution networks where different voltage levels are needed. The turn ratio of the low voltage and high voltage windings is mechanically controlled by an on-load tap changer or de-energized tap changer. As the tap changer is the transformer’s only moving part, it is highly susceptible to mechanical failure and aging degradation. While some diagnostic tools have been used to determine the mechanical condition of tap changer contacts, not much attention was given to use the frequency response analysis to diagnose the transformer’s tap changers’ mechanical integrity. This paper is taking one step forward into maturing the application of the frequency response analysis (FRA) technique to detect transformer tap changer faults. In this regard, two common tap changer faults are created, and experimental testing for four FRA test configurations is conducted. For a better understanding of the tap changer fault mechanism, an electrical equivalent circuit model is proposed and designed using Simulink. The simulation and implementation of the equivalent circuits using MATLAB\R2018a.

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Section: Coking Formulationmentioning

confidence: 99%

Application of Frequency Response Analysis Technique to Detect Transformer Tap Changer Faults

et al. 2021

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“…As for the apparent power, despite the ability of the PZEM-004T sensor to calculate its value, the relationship between voltage line and voltage phase shown in equation ( 5) was adopted, because using a single sensor is sufficient to measure a single phase only, while the substation is fed by 3 phases per line. Where, S= apparent power, VL= V Line, and VP= V Phase, IL=I Line, IP= I Phase [33].…”

Section: Power Trianglementioning

confidence: 99%

Low Cost Portable System for Converting Mosul Electrical Substations to Smart One’s

AlKasap¹,

Hagem²

2021

(AREJ)

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Today electricity supplement still has power failures and blackouts due to the lack of automated analysis and the utility's low visibility over the grid. Small and undetected electrical problems can have far-reaching consequences. These failures cause not only high-energy losses, but also costly unscheduled outages, severe injury to employees, and even a fire. Therefore, the monitoring of electrical substations is essential to detect faults and ensure long-term safe operation, safety, protection, and reliability. Internet of things technology provides the possibility of obtaining station data in realtime. In this research, two systems were designed, implemented, and tested in high voltage electric stations. The first part is designed to obtain data on the environmental conditions at the substations, and the important parameters from the transmission lines at the substations in real-time, which help to prevent power outages by relying on engineers who can analyze comprehensively the electrical energy. The system also provides the Automatic Under Frequency Load Shedding ability if the frequency in the stations falls below the normal limit, which contributes to maintain the efficiency and the quality of electrical energy in the substations, and provides protection for the substations. The second part is designed to obtain the values of the parameters that determine the electrical transformers' conditions and monitors the status of the line in terms of switching off and on in real-time at the substations. Thus, these proposed systems are transforming the traditional substations into smart substations. The performance of the system is introduced based on correlation of data and percentage error. The best correlation was for the current data and the least percentage error was for the current. We strongly believed that the proposed system is vesible.

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“…By observation of different responses of data measured, multiple types of fault are detected and also fault severity is identified [27]. The FRA response tool can get hold of the voltage transfer function for windings frequency between (20 Hz to 2 MHz) [28,29]…”

Section: Literature or Bibliography Surveymentioning

confidence: 99%

Phase to phase fault detection of 3-phase induction motor using FRA technique

Alawady

Yousof

Azis

et al. 2020

IJPEDS

Self Cite

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The purpose for preparing this paper is to innovate a new method to detection and diagnosis the three-phase induction motor electrical failures, especially the failures that occur in Stator winding. Stator winding breakdown largely contributes to induction motor failures. To understand internal fault in induction motors winding, four cases studies of different three-phase induction motors (TPIM) were analysed according to two conditions: normal winding condition and windings shorted between two phases. In this paper, the measurement of frequency response analysis (FRA) on the stator winding with inter-phase short is presented. Additionally, Frequency Response Analysis (FRA) interpretation technique classify and quantify the fault is also proposed. For interpretation of the FRA, a statistical indicator, which is NCEPRI algorithm is used for comparison the measured responses.

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Frequency response analysis for transformer tap changer damage detection

Cited by 10 publications

References 10 publications

Application of Frequency Response Analysis Technique to Detect Transformer Tap Changer Faults

Application of Frequency Response Analysis Technique to Detect Transformer Tap Changer Faults

Low Cost Portable System for Converting Mosul Electrical Substations to Smart One’s

Phase to phase fault detection of 3-phase induction motor using FRA technique

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