Settings determination for numerical transformer differential protection via its detailed mathematical model

Andreev, Mikhail; Suvorov, Aleksey; Ruban, Nikolay; Ufa, Ruslan; Gusev, Alexander; Askarov, Alisher; Kievets, Аnton; Bhalja, Bhavesh R.

doi:10.1049/iet-gtd.2019.0932

Cited by 9 publications

(5 citation statements)

References 27 publications

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“…The detailed description and different performance parameters, such as the reaction time and execution time distribution of program operation via the microcontrollers used in the HRTSim, are shown in the work of Andreev et al [23]. The reliability of the information obtained via HRTSim has been confirmed through the extensive laboratory studies and validations with field measurements [26][27]. The generic structure of HRTSim is shown in Fig.…”

Section: A Hybrid Modeling Of Electric Power Systemmentioning

confidence: 94%

A Hybrid Simulation of Converter-Interfaced Generation as the Part of a Large-Scale Power System Model

Razzhivin

Askarov

Rudnik

et al. 2021

Int. j. eng. technol. innov.

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This study aims to propose an alternative hybrid approach to model renewable energy sources (RESs), which provide the most reliable results in comparison with the existing simulating tools. Within the framework of this approach, a specialized hybrid processor for modeling converter-interfaced generation (CIG) is developed. This study describes its structure and validation in the test system by comparing the results with commercial modeling tools, and also presents experimental studies of its operation as parts of the practical power system. The results obtained confirm the adequacy of the developed tools.

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Section: A Hybrid Modeling Of Electric Power Systemmentioning

confidence: 94%

A Hybrid Simulation of Converter-Interfaced Generation as the Part of a Large-Scale Power System Model

Razzhivin

Askarov

Rudnik

et al. 2021

Int. j. eng. technol. innov.

Self Cite

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“…HV MCT Ratio or LV MCT Ratio = a = I sec ondary I primary (7) Referring to Figure 6a and using HV MCT Ratio, we can illustrate that upon the injection of balanced three phase nominal HV secondary current (0.35A) into corresponding relay current elements with no current injection into LV side relay current elements, current equal to 1A flows in secondary of HV MCT, resulting in flow of I di f f = 1 pu using Equation (5) and I bias = 0.5 pu using Equation (6). In Figure 6a, the phase shift of three phases is shown through clock convention, where 0 corresponds to 0 • , 4 corresponds to −120 • , and 8 corresponds to −240 • .…”

Section: Measurement Testmentioning

confidence: 99%

“…Tables 5 and 6 record the measurement results of the HV side relay current elements. Referring to Figure 6b and LV MCT Ratio, the injection of balanced three phase nominal LV secondary current (0.58A) into corresponding relay current elements with no current injection into HV side relay current elements, the current equal to 1A flows in secondary of the LV MCT, resulting in flow of I diff = 1 pu using Equation (5) and I bias = 0.5 pu using Equation (6). In Figure 6b, the clockwise phase shift of three phases is shown, where 6, 10, and 2 correspond to −180 • , −300 • , and 60 • .…”

Section: Measurement Testmentioning

confidence: 99%

“…In [5], a study of differential relay is presented considering power system disturbances and the behavior of the numerical differential relay is analyzed in detail; however, its exact threshold settings and set points are not verified. A novel technique for determining the settings of numerical differential relay is proposed in [6]. The authors have used a software-based simulator that utilizes iterations for the determination of settings.…”

Section: Introductionmentioning

confidence: 99%

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A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer

et al. 2021

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In power systems, the programmable numerical differential relays are widely used for the protection of generators, bus bars, transformers, shunt reactors, and transmission lines. Retrofitting of relays is the need of the hour because lack of proper testing techniques and misunderstanding of vital procedures may result in under performance of the overall protection system. Lack of relay’s proper testing provokes an unpredictability in its behavior, that may prompt tripping of a healthy power system. Therefore, the main contribution of the paper is to prepare a step-by-step comprehensive procedural guideline for practical implementation of relay testing procedures and a detailed insight analysis of relay’s settings for the protection of an Extra High Voltage (EHV) auto transformer. The experimental results are scrutinized to document a detailed theoretical and technical analysis. Moreover, the paper also covers shortcomings of existing literature by documenting specialized literature that covers all aspects of protection relays, i.e., from basics of electromechanical domain to the technicalities of the numerical differential relay covering its detailed testing from different reputed manufacturers. A secondary injection relay test set is used for detailed testing of differential relay under test, and the S1 Agile software is used for protection relay settings, configuration modification, and detailed analysis.

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“…As for arc discharge, relay protection is the last line to ensure the safety of the transformer, playing a critical role in rapid isolating faults and avoiding transformer burnout and fault amplification [5]. The mostly used relay protection of transformers in engineering is current differential protection [6] and gas protection. However, many fault cases [7] show that the existing transformer relay protection system is not perfect.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the transition process from partial discharge to arc discharge of oil–paper insulation based on fibre‐optic sensors

Zhang

Chen

et al. 2022

IET Generation Trans & Dist

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Arc discharge in the power transformer can bring enormous economic losses and safety risks. The transformer protection system for arc discharge faults is still not ideal. The physical characteristics of the whole process from partial discharge defects transition to arc faults are not fully recognized, mainly because it is difficult to establish and sense the relevant characteristic parameters. This paper built a research platform for studying the transition process from partial discharge to early arc discharge based on fibre‐optic ultrasonic, temperature, pressure sensors with traditional electrical voltage and current sensors. Five discharge models are designed and the changing pattern of multiple parameters in the transition process of different models is studied. The experiment results show that the amplitude and frequency of acoustic waves drop significantly after the arc breakdown. Ultrasonic and high‐frequency current sensing in the early warning of arc fault each has its own limitations. The pressure caused by the arc is not only related to the arc energy but also related to the discharge types. The overall oil temperature change after the early arc discharge is small and hard to detect. This work highlights the promise of using fibre‐optic sensors for physical process research within a harsh electromagnetic environment.

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Settings determination for numerical transformer differential protection via its detailed mathematical model

Cited by 9 publications

References 27 publications

A Hybrid Simulation of Converter-Interfaced Generation as the Part of a Large-Scale Power System Model

A Hybrid Simulation of Converter-Interfaced Generation as the Part of a Large-Scale Power System Model

A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer

Experimental study on the transition process from partial discharge to arc discharge of oil–paper insulation based on fibre‐optic sensors

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