Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect
Abstract The grounding system of an electrical substation provides safety to both operator and equipment. The lightning current waveform has a major influence on the dynamic performance of ground electrodes. If lightning current is large enough, soil will be ionized, which will have a great effect o...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | Journal of Electrical Systems and Information Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s43067-023-00120-2 |
| _version_ | 1797577541050957824 |
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| author | Kaushal Pratap Sengar Kandasamy Chandrasekaran |
| author_facet | Kaushal Pratap Sengar Kandasamy Chandrasekaran |
| author_sort | Kaushal Pratap Sengar |
| collection | DOAJ |
| description | Abstract The grounding system of an electrical substation provides safety to both operator and equipment. The lightning current waveform has a major influence on the dynamic performance of ground electrodes. If lightning current is large enough, soil will be ionized, which will have a great effect on the transient performance of the grounding system. Many numerical models have been developed to evaluate the transient performance of grounding system, still it is a challenging task to analyze the impulse behavior of grounding system efficiently. In this paper, the transient behavior of grounding systems with consideration of nonlinear and dynamic effects of soil ionization is presented. Grounding systems such as vertical rod, horizontal conductor and grounding grid buried in the homogeneous soil are considered as case study. Proposed model is the combination of circuit theory approach and method of moment with consideration of frequency-dependent impedance and mutual coupling effect between the conductor segments. Self and mutual component of inductance and resistance are considered in the analysis. Initially, transient performance of grounding system is analyzed for single vertical rod, horizontal and square grounding electrodes, further it is extended for vertical rod (more than one), horizontal conductor and grounding grids with different configurations. The analysis of grounding system with the consideration of mutual coupling effect is compared with devoid of mutual coupling, and differences between them are evaluated. For validating the developed method, simulated results are compared with the results reported in the literature, and good agreements are found. Analysis shows that the grounding impulse impedance decreased with increasing the magnitude of injected current. Developed method will help to improve the modeling of simple as well as complex grounding system buried in homogeneous soil. |
| first_indexed | 2024-03-10T22:09:47Z |
| format | Article |
| id | doaj.art-dd84923d7bac48d7ba8158d80f33b759 |
| institution | Directory Open Access Journal |
| issn | 2314-7172 |
| language | English |
| last_indexed | 2024-03-10T22:09:47Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Electrical Systems and Information Technology |
| spelling | doaj.art-dd84923d7bac48d7ba8158d80f33b7592023-11-19T12:40:34ZengSpringerOpenJournal of Electrical Systems and Information Technology2314-71722023-11-0110111910.1186/s43067-023-00120-2Analysis of grounding system transient with consideration of soil ionization and mutual coupling effectKaushal Pratap Sengar0Kandasamy Chandrasekaran1Department of Electrical Engineering, Madhav Institute of Technology and ScienceDepartment of Electrical Engineering, National Institute of TechnologyAbstract The grounding system of an electrical substation provides safety to both operator and equipment. The lightning current waveform has a major influence on the dynamic performance of ground electrodes. If lightning current is large enough, soil will be ionized, which will have a great effect on the transient performance of the grounding system. Many numerical models have been developed to evaluate the transient performance of grounding system, still it is a challenging task to analyze the impulse behavior of grounding system efficiently. In this paper, the transient behavior of grounding systems with consideration of nonlinear and dynamic effects of soil ionization is presented. Grounding systems such as vertical rod, horizontal conductor and grounding grid buried in the homogeneous soil are considered as case study. Proposed model is the combination of circuit theory approach and method of moment with consideration of frequency-dependent impedance and mutual coupling effect between the conductor segments. Self and mutual component of inductance and resistance are considered in the analysis. Initially, transient performance of grounding system is analyzed for single vertical rod, horizontal and square grounding electrodes, further it is extended for vertical rod (more than one), horizontal conductor and grounding grids with different configurations. The analysis of grounding system with the consideration of mutual coupling effect is compared with devoid of mutual coupling, and differences between them are evaluated. For validating the developed method, simulated results are compared with the results reported in the literature, and good agreements are found. Analysis shows that the grounding impulse impedance decreased with increasing the magnitude of injected current. Developed method will help to improve the modeling of simple as well as complex grounding system buried in homogeneous soil.https://doi.org/10.1186/s43067-023-00120-2Grounding systemImpulse impedanceLeakage currentSoil ionizationTransient voltage |
| spellingShingle | Kaushal Pratap Sengar Kandasamy Chandrasekaran Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect Journal of Electrical Systems and Information Technology Grounding system Impulse impedance Leakage current Soil ionization Transient voltage |
| title | Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect |
| title_full | Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect |
| title_fullStr | Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect |
| title_full_unstemmed | Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect |
| title_short | Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect |
| title_sort | analysis of grounding system transient with consideration of soil ionization and mutual coupling effect |
| topic | Grounding system Impulse impedance Leakage current Soil ionization Transient voltage |
| url | https://doi.org/10.1186/s43067-023-00120-2 |
| work_keys_str_mv | AT kaushalpratapsengar analysisofgroundingsystemtransientwithconsiderationofsoilionizationandmutualcouplingeffect AT kandasamychandrasekaran analysisofgroundingsystemtransientwithconsiderationofsoilionizationandmutualcouplingeffect |