Rogowski coils suit relay protection and measurement ~of power systems\

Kojovic, Ljubomir A.

doi:10.1109/67.595293

Cited by 89 publications

(39 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to many specialists [1], [11]- [22], increased requirements are imposed on quality of the signal received by MP-based protection relays. The signal should not contain noise, it should stay only within its certain frequency range.…”

Section: Special Features Of Signal Conversion In Mp-based Protectionsmentioning

confidence: 99%

“…In some publications [1], [3]- [14] suggestion is made that for microprocessor relays it is desirable "to use more perfect current transducers than current transformers". An example of such current transducer is the Rogowski coil [1]- [21].…”

Section: Special Features Of Signal Conversion In Mp-based Protectionsmentioning

confidence: 99%

“…An example of such current transducer is the Rogowski coil [1]- [21]. In this case there is no need for an integrating filter.…”

Section: Special Features Of Signal Conversion In Mp-based Protectionsmentioning

confidence: 99%

“…The transition to digital relaying is inevitable [1], [2]. It is known that such large international relay vendors as ABB, General Electric, Siemens, Alstom may soon stop the production of electromechanical relays.…”

Section: Introductionmentioning

confidence: 99%

“…It is known that such large international relay vendors as ABB, General Electric, Siemens, Alstom may soon stop the production of electromechanical relays. This fact is mainly explained by the argument that it is much more profitable to manufacture complex microprocessor-based relays than their electromechanical or solid-state counterparts [1]- [3].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Selection of Digital Filter for Microprocessor Protection Relays

Solovev¹

2018

IJECE

View full text Add to dashboard Cite

The article considers some issues related to replacement of electromechanical relays used for protection of power facilities with microprocessor relays. One of the urgent problems connected with implementation of microprocessor overcurrent protections is how to use current transducers other than usual current transformers and in particular Rogowski coils that become more and more widespread. In the article are compared twelve methods of synthesis of a digital filter basing on the analog prototype -second-order integrating filter. The bilinear filter and Boxer-Thaler filters are analyzed in respect to their use in microprocessor relays. Basing on the research results a technique for selection of parameters of digital integrating filters for microprocessor relays is proposed. Simulation results show that Boxer-Thaler and bilinear filters have better accuracy during transient current measurements than the analog filter. The study allows concluding that in many cases the digital second-order bilinear filter is the best choice for use in microprocessor relays.

show abstract

Section: Special Features Of Signal Conversion In Mp-based Protectionsmentioning

confidence: 99%

Section: Special Features Of Signal Conversion In Mp-based Protectionsmentioning

confidence: 99%

“…An example of such current transducer is the Rogowski coil [1]- [21]. In this case there is no need for an integrating filter.…”

Section: Special Features Of Signal Conversion In Mp-based Protectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Selection of Digital Filter for Microprocessor Protection Relays

Solovev¹

2018

IJECE

View full text Add to dashboard Cite

show abstract

Voltage and Current Transducers for Power Systems

Muscas

Locci

2016

Handbook of Measurement in Science and Engineering

View full text Add to dashboard Cite

Fault detection in the secondary side of electric arc furnace transformer using the primary side data

Marvasti

Samet

2013

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

This paper presents a novel methodology for detecting fault conditions in the secondary side of electric arc furnace (EAF) transformer. The major focus of this study is to design a digital algorithm which uses solely the primary side current. Therefore, in this new methodology, only the primary side current is measured, and the fault presence in the secondary side is investigated. Here, there are two main objectives. The first objective is minimizing the fail-to-trip functioning probability, and the second one is minimizing the Mal-Trip operation probability. The fault characteristics are extracted using accurate simulation of EAFs installed in the Mobarakeh Steel Company (MSC) in Isfahan, Iran to fulfill the first objective. Three-phase field data of instantaneous current from the primary side of eight EAF transformers of MSC is also provided to evaluate performance of the proposed algorithm in the normal conditions and to achieve the second objective. The proposed algorithm is based on the sudden reduction of current harmonics in the fault conditions which is evaluated by a proposed special index which is called "the difference function" in this paper. Overall reliability assessment (dependability and security) of the proposed protective scheme demonstrates that even in this highly varying and unpredictable environment, the proposed algorithm is so precise and fast in fault detection. Figure 14. Harmonic components of one of the measured records in the normal conditions. a) Fundamental. b) Second. c) Third. d) Fourth.

show abstract

Rogowski coils suit relay protection and measurement ~of power systems\

Cited by 89 publications

References 0 publications

Selection of Digital Filter for Microprocessor Protection Relays

Selection of Digital Filter for Microprocessor Protection Relays

Voltage and Current Transducers for Power Systems

Fault detection in the secondary side of electric arc furnace transformer using the primary side data

Contact Info

Product

Resources

About