A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM
The article presents and substantiates a simplified mathematical simulation model realization technique for a three-phase bank of current transformers (CT) based on their nameplate data. The secondary windings and load of the current transformers form a Y-connected circuit with neutral conductor. Co...
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| Format: | Article |
| Language: | Russian |
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Belarusian National Technical University
2015-10-01
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| Series: | Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика |
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| Online Access: | https://energy.bntu.by/jour/article/view/887 |
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| _version_ | 1832557236374732800 |
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| author | I. V. Novash Yu. V. Rumiantsev |
| author_facet | I. V. Novash Yu. V. Rumiantsev |
| author_sort | I. V. Novash |
| collection | DOAJ |
| description | The article presents and substantiates a simplified mathematical simulation model realization technique for a three-phase bank of current transformers (CT) based on their nameplate data. The secondary windings and load of the current transformers form a Y-connected circuit with neutral conductor. Consistent with the presented technique the simplified mathematical simulation realizes in the dynamic-modeling environment of MatLab–Simulink–SimPowerSystems. This simulation allows obtaining the secondary current curve shape entering only the nameplate data of the CT being simulated. Thus, the simulation under consideration enables the assessment of technical feasibility of the CT from viewpoint of correct functioning of the relay protective devices during transient processes in the electric energy systems.Employing the model, the authors conduct computational experiments simulating the CT typical operating modes: short-circuit current passage with presence/absence of the direct component and short-circuit current passage with presence of the direct component and residual magnetic induction of the CT. The paper examines the modes of automatic re-closing failure at different stages of the breaker closure with oscillograms drawn illustrating each characteristic case.The authors compare two methods for the CT iron magnetization-curve assigning: manual approximation and the Ollendorf-formula approximation. Relying on this comparison they conclude on feasability of application of the magnetization-curve approximating function for the CT operating analysis during transient processes in the electric energy systems. An elaborated user-friendly graphic interface provides a means of visual assigning the CT nominal parameters, the residual magnetic induction, and the method of the transformer iron magnetization curve approximation. The results of conducted computational experiments prove feasibility of the CT-bank simulation model. |
| format | Article |
| id | doaj-art-627d3c8706d54167b311f87876897992 |
| institution | Kabale University |
| issn | 1029-7448 2414-0341 |
| language | Russian |
| publishDate | 2015-10-01 |
| publisher | Belarusian National Technical University |
| record_format | Article |
| series | Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика |
| spelling | doaj-art-627d3c8706d54167b311f878768979922025-02-03T05:35:39ZrusBelarusian National Technical UniversityИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика1029-74482414-03412015-10-01052338864A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEMI. V. Novash0Yu. V. Rumiantsev1Belarusian National Technical UniversitBelarusian National Technical UniversitThe article presents and substantiates a simplified mathematical simulation model realization technique for a three-phase bank of current transformers (CT) based on their nameplate data. The secondary windings and load of the current transformers form a Y-connected circuit with neutral conductor. Consistent with the presented technique the simplified mathematical simulation realizes in the dynamic-modeling environment of MatLab–Simulink–SimPowerSystems. This simulation allows obtaining the secondary current curve shape entering only the nameplate data of the CT being simulated. Thus, the simulation under consideration enables the assessment of technical feasibility of the CT from viewpoint of correct functioning of the relay protective devices during transient processes in the electric energy systems.Employing the model, the authors conduct computational experiments simulating the CT typical operating modes: short-circuit current passage with presence/absence of the direct component and short-circuit current passage with presence of the direct component and residual magnetic induction of the CT. The paper examines the modes of automatic re-closing failure at different stages of the breaker closure with oscillograms drawn illustrating each characteristic case.The authors compare two methods for the CT iron magnetization-curve assigning: manual approximation and the Ollendorf-formula approximation. Relying on this comparison they conclude on feasability of application of the magnetization-curve approximating function for the CT operating analysis during transient processes in the electric energy systems. An elaborated user-friendly graphic interface provides a means of visual assigning the CT nominal parameters, the residual magnetic induction, and the method of the transformer iron magnetization curve approximation. The results of conducted computational experiments prove feasibility of the CT-bank simulation model.https://energy.bntu.by/jour/article/view/887simulationcurrent transformerrelaying protectionmagnetization curvevoltage-current characteristicsaturationparameters computationsimulinkmatlabsimpowersystems. |
| spellingShingle | I. V. Novash Yu. V. Rumiantsev A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика simulation current transformer relaying protection magnetization curve voltage-current characteristic saturation parameters computation simulink matlab simpowersystems. |
| title | A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM |
| title_full | A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM |
| title_fullStr | A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM |
| title_full_unstemmed | A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM |
| title_short | A SIMPLIFIED MODEL OF THREE-PHASE BANK OF CURRENT TRANSFORMERS IN THE DYNAMIC SIMULATION SYSTEM |
| title_sort | simplified model of three phase bank of current transformers in the dynamic simulation system |
| topic | simulation current transformer relaying protection magnetization curve voltage-current characteristic saturation parameters computation simulink matlab simpowersystems. |
| url | https://energy.bntu.by/jour/article/view/887 |
| work_keys_str_mv | AT ivnovash asimplifiedmodelofthreephasebankofcurrenttransformersinthedynamicsimulationsystem AT yuvrumiantsev asimplifiedmodelofthreephasebankofcurrenttransformersinthedynamicsimulationsystem AT ivnovash simplifiedmodelofthreephasebankofcurrenttransformersinthedynamicsimulationsystem AT yuvrumiantsev simplifiedmodelofthreephasebankofcurrenttransformersinthedynamicsimulationsystem |