Compensation of the Current-Transformer Saturation Effects for Digital Relays

Ajaei, Firouz Badrkhani; Sanaye‐Pasand, M.; Davarpanah, Mahdi; Rezaei-Zare, Afshin; Iravani, Reza

doi:10.1109/tpwrd.2011.2161622

Cited by 66 publications

(21 citation statements)

References 30 publications

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“…Moreover, the number of calculations is higher than the proposed technique in this study. † Detection of CT saturation with the use of algorithmic methods (measurement of certain signal features using first, second and third difference functions) [16][17][18]. † Use of artificial intelligence techniques for CT saturation detection and compensation.…”

Section: Methodsmentioning

confidence: 99%

Correction of saturated current from measurement current transformer

Özgönenel

2013

IET Electric Power Applications

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The suggested study presents an easy and effective way to compensate for the distorted secondary current of measurement-type current transformers (CTs). The suggested compensating algorithm is based on estimating the magnetising current from a Fröhlich hysteresis approach. The efficiency of the proposed technique was first proved using computer simulations. The prototype compensating device was then tested in a laboratory environment using a 5/1A, 10VA, C0,5 measurement-type CT. The proposed compensation algorithm is dependent on CT burden and X/R ratio of the line where CT is connected. The outcomes of the study demonstrate that the technique is able to reconstruct the secondary current with an acceptable error and can be applied to any measurement-type CT regardless of its size and winding topology.

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Section: Methodsmentioning

confidence: 99%

Correction of saturated current from measurement current transformer

Özgönenel

2013

IET Electric Power Applications

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“…The stability of the relay operation can be improved by using algorithms to detect and compensate the distorted current of the saturated CT's [50,51]. Alternatively, the solution used in several commercial available differential relays can also be applied, which consists in blocking the relay when the CT saturation is detected [48].…”

Section: Internal/external Fault Discrimination With the Differentialmentioning

confidence: 99%

Application of Park's power components to the differential protection of three-phase transformers

Oliveira

Cardoso

2012

Electric Power Systems Research

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“…Practically speaking, traditional CTs encounter several technically unsolved problems (e.g., DC and AC saturation, remanent magnetization). These problems are all caused by the effect of hysteresis of CT iron cores [4,5]. Traditional CTs also have some physical drawbacks such as large volume and heavy weight, which limits the development and application of power protective systems.…”

Section: Introductionmentioning

confidence: 99%

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

et al. 2017

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Abstract:Traditional current transformers (CTs) suffer from DC and AC saturation and remanent magnetization in many industrial applications. Moreover, the drawbacks of traditional CTs, such as closed iron cores, bulky volume, and heavy weight, further limit the development of an intelligent power protection system. In order to compensate for these drawbacks, we proposed a novel current measurement method by using Hall sensors, which is called the Hall-effect current transformer (HCT). The existing commercial Hall sensors are electronic components, so the reliability of the HCT is normally worse than that of the traditional CT. Therefore, our study proposes a redundancy mechanism for the HCT to strengthen its reliability. With multiple sensor modules, the method has the ability to improve the accuracy of the HCT as well. Additionally, the proposed redundancy mechanism monitoring system provides a condition-based maintenance for the HCT. We verify our method with both simulations and an experimental test. The results demonstrate that the proposed HCT with a redundancy mechanism can almost achieve Class 0.2 for measuring CTs according to IEC Standard 60044-8.

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Compensation of the Current-Transformer Saturation Effects for Digital Relays

Cited by 66 publications

References 30 publications

Correction of saturated current from measurement current transformer

Correction of saturated current from measurement current transformer

Application of Park's power components to the differential protection of three-phase transformers

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

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