The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks
One important problem in the operation of medium voltage networks is the detection of a single-line-to-ground fault in its incipient state, when the fault resistance values are very high. In a medium voltage (MV) distribution network with a neutral grounding resistor (NGR), one of the methods employ...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Designs |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2411-9660/5/3/53 |
| _version_ | 1797519705354797056 |
|---|---|
| author | Dumitru Toader Marian Greconici Daniela Vesa Maria Vintan Claudiu Solea Adrian Maghet Ildiko Tatai |
| author_facet | Dumitru Toader Marian Greconici Daniela Vesa Maria Vintan Claudiu Solea Adrian Maghet Ildiko Tatai |
| author_sort | Dumitru Toader |
| collection | DOAJ |
| description | One important problem in the operation of medium voltage networks is the detection of a single-line-to-ground fault in its incipient state, when the fault resistance values are very high. In a medium voltage (MV) distribution network with a neutral grounding resistor (NGR), one of the methods employed to discriminate a single line-to-ground fault is the use of an overcurrent relay with an operating characteristic adjusted according to the effective value of the current flowing through the limiting resistor. In case of a single line-to-ground fault with a high fault resistance value, the correct tripping settings of the protective relay require the precise computation of this current. In comparison to the assumptions made by the models from the literature—the three-phase voltage system of the medium voltage busbars is symmetrical and there are no active power losses in the network insulation—the model proposed in this paper considers the pre-fault zero-sequence voltage of the medium voltage busbars and the active power losses in the network insulation, which is necessary in certain fault conditions where the use of the former leads to unacceptable errors. |
| first_indexed | 2024-03-10T07:46:34Z |
| format | Article |
| id | doaj.art-8dd78dd26ca74a9a8d1474397674d0c5 |
| institution | Directory Open Access Journal |
| issn | 2411-9660 |
| language | English |
| last_indexed | 2024-03-10T07:46:34Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Designs |
| spelling | doaj.art-8dd78dd26ca74a9a8d1474397674d0c52023-11-22T12:37:56ZengMDPI AGDesigns2411-96602021-08-01535310.3390/designs5030053The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral NetworksDumitru Toader0Marian Greconici1Daniela Vesa2Maria Vintan3Claudiu Solea4Adrian Maghet5Ildiko Tatai6Department Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, RomaniaDepartment Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, RomaniaDepartment Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, RomaniaDepartment Computer Sciences and Electrical Engineering, Lucian Blaga University, 550024 Sibiu, RomaniaDepartment Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, RomaniaDepartment Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, RomaniaDepartment Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, RomaniaOne important problem in the operation of medium voltage networks is the detection of a single-line-to-ground fault in its incipient state, when the fault resistance values are very high. In a medium voltage (MV) distribution network with a neutral grounding resistor (NGR), one of the methods employed to discriminate a single line-to-ground fault is the use of an overcurrent relay with an operating characteristic adjusted according to the effective value of the current flowing through the limiting resistor. In case of a single line-to-ground fault with a high fault resistance value, the correct tripping settings of the protective relay require the precise computation of this current. In comparison to the assumptions made by the models from the literature—the three-phase voltage system of the medium voltage busbars is symmetrical and there are no active power losses in the network insulation—the model proposed in this paper considers the pre-fault zero-sequence voltage of the medium voltage busbars and the active power losses in the network insulation, which is necessary in certain fault conditions where the use of the former leads to unacceptable errors.https://www.mdpi.com/2411-9660/5/3/53power distribution systemsmathematical modelfault currentsingle-phase faultsymmetrical components |
| spellingShingle | Dumitru Toader Marian Greconici Daniela Vesa Maria Vintan Claudiu Solea Adrian Maghet Ildiko Tatai The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks Designs power distribution systems mathematical model fault current single-phase fault symmetrical components |
| title | The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks |
| title_full | The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks |
| title_fullStr | The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks |
| title_full_unstemmed | The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks |
| title_short | The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks |
| title_sort | influence of the characteristics of the medium voltage network on the single line to ground fault current in the resistor grounded neutral networks |
| topic | power distribution systems mathematical model fault current single-phase fault symmetrical components |
| url | https://www.mdpi.com/2411-9660/5/3/53 |
| work_keys_str_mv | AT dumitrutoader theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT mariangreconici theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT danielavesa theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT mariavintan theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT claudiusolea theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT adrianmaghet theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT ildikotatai theinfluenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT dumitrutoader influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT mariangreconici influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT danielavesa influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT mariavintan influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT claudiusolea influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT adrianmaghet influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks AT ildikotatai influenceofthecharacteristicsofthemediumvoltagenetworkonthesinglelinetogroundfaultcurrentintheresistorgroundedneutralnetworks |