INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS
The relevance of the research arises from the need to develop technical solutions to limit switching overvoltages that occur when switching power transformers and effective compensation of reactive power. The main aim of the research is to study the influence of reactive power compensation on value...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2021-03-01
|
| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/3115/2436 |
| _version_ | 1828946348613828608 |
|---|---|
| author | Roman S. Kuzmin Artem A. Zavalov Roman A. Mainagashev Vitalii A. Menshikov Ilya S. Kuzmin |
| author_facet | Roman S. Kuzmin Artem A. Zavalov Roman A. Mainagashev Vitalii A. Menshikov Ilya S. Kuzmin |
| author_sort | Roman S. Kuzmin |
| collection | DOAJ |
| description | The relevance of the research arises from the need to develop technical solutions to limit switching overvoltages that occur when switching power transformers and effective compensation of reactive power. The main aim of the research is to study the influence of reactive power compensation on value of switching overvoltages when switching power transformers 6 (10)/0,4 kV and substantiation of the most effective means of protecting power transformers from switching overvoltages. Objects: transformers with a rated power of 250, 400, 630 and 1000 kVA; vacuum circuit-breaker; individual phase compensation devices. Methods. Instrumental-oscillographic, simulation of transient processes of phase voltages was performed in MultiSim. Results. The authors have analyzed the efficiency of existing protection equipment against switching overvoltages arising during switching of power transformers 6 (10)/0,4 kV. Computer simulation of influence of reactive power compensation on switching overvoltage value was performed. To confirm the simulation results, experimental studies were performed. The oscillograms of switching overvoltages that occur when a power transformer with rated power of 250 kVA is disconnected are shown. It was established that devices designed for reactive power compensation can be successfully used to suppress switching overvoltages when switching power transformers, provided that, these devices are connected to the low voltage winding of the transformer. In residential electric networks for effective compensation of reactive power it is proposed to use capacitor units with individual phase compensation and to place them on the input bus of municipal and residential buildings. For suppression of switching overvoltages in residential electric networks, it is necessary to introduce a capacitor unit with symmetrical unregulated compensation at transformer substations. |
| first_indexed | 2024-12-14T05:08:08Z |
| format | Article |
| id | doaj.art-06b67f3ba7c84221a6f137de763abb29 |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-12-14T05:08:08Z |
| publishDate | 2021-03-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-06b67f3ba7c84221a6f137de763abb292022-12-21T23:16:02ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302021-03-01332319720910.18799/24131830/2021/3/3115INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERSRoman S. Kuzmin0Artem A. Zavalov1Roman A. Mainagashev2Vitalii A. Menshikov3Ilya S. Kuzmin4Siberian Federal UniversitySiberian Federal UniversitySiberian Federal UniversitySiberian Federal UniversityResearch and Production Enterprise «Rutas»LLCThe relevance of the research arises from the need to develop technical solutions to limit switching overvoltages that occur when switching power transformers and effective compensation of reactive power. The main aim of the research is to study the influence of reactive power compensation on value of switching overvoltages when switching power transformers 6 (10)/0,4 kV and substantiation of the most effective means of protecting power transformers from switching overvoltages. Objects: transformers with a rated power of 250, 400, 630 and 1000 kVA; vacuum circuit-breaker; individual phase compensation devices. Methods. Instrumental-oscillographic, simulation of transient processes of phase voltages was performed in MultiSim. Results. The authors have analyzed the efficiency of existing protection equipment against switching overvoltages arising during switching of power transformers 6 (10)/0,4 kV. Computer simulation of influence of reactive power compensation on switching overvoltage value was performed. To confirm the simulation results, experimental studies were performed. The oscillograms of switching overvoltages that occur when a power transformer with rated power of 250 kVA is disconnected are shown. It was established that devices designed for reactive power compensation can be successfully used to suppress switching overvoltages when switching power transformers, provided that, these devices are connected to the low voltage winding of the transformer. In residential electric networks for effective compensation of reactive power it is proposed to use capacitor units with individual phase compensation and to place them on the input bus of municipal and residential buildings. For suppression of switching overvoltages in residential electric networks, it is necessary to introduce a capacitor unit with symmetrical unregulated compensation at transformer substations.http://izvestiya.tpu.ru/archive/article/view/3115/2436reactive powerpower factorswitching overvoltagevacuum circuit breakerindividual phase compensationchopping currentcapacitor unitpower reducing transformer |
| spellingShingle | Roman S. Kuzmin Artem A. Zavalov Roman A. Mainagashev Vitalii A. Menshikov Ilya S. Kuzmin INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS Известия Томского политехнического университета: Инжиниринг георесурсов reactive power power factor switching overvoltage vacuum circuit breaker individual phase compensation chopping current capacitor unit power reducing transformer |
| title | INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS |
| title_full | INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS |
| title_fullStr | INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS |
| title_full_unstemmed | INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS |
| title_short | INFLUENCE OF REACTIVE POWER COMPENSATION ON OVERVOLTAGES VALUE WHEN SWITCHING POWER TRANSFORMERS |
| title_sort | influence of reactive power compensation on overvoltages value when switching power transformers |
| topic | reactive power power factor switching overvoltage vacuum circuit breaker individual phase compensation chopping current capacitor unit power reducing transformer |
| url | http://izvestiya.tpu.ru/archive/article/view/3115/2436 |
| work_keys_str_mv | AT romanskuzmin influenceofreactivepowercompensationonovervoltagesvaluewhenswitchingpowertransformers AT artemazavalov influenceofreactivepowercompensationonovervoltagesvaluewhenswitchingpowertransformers AT romanamainagashev influenceofreactivepowercompensationonovervoltagesvaluewhenswitchingpowertransformers AT vitaliiamenshikov influenceofreactivepowercompensationonovervoltagesvaluewhenswitchingpowertransformers AT ilyaskuzmin influenceofreactivepowercompensationonovervoltagesvaluewhenswitchingpowertransformers |