JP2000092698A5 - - Google Patents
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- JP2000092698A5 JP2000092698A5 JP1998361678A JP36167898A JP2000092698A5 JP 2000092698 A5 JP2000092698 A5 JP 2000092698A5 JP 1998361678 A JP1998361678 A JP 1998361678A JP 36167898 A JP36167898 A JP 36167898A JP 2000092698 A5 JP2000092698 A5 JP 2000092698A5
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- Prior art keywords
- ground
- current
- ground fault
- reference value
- voltage
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Description
【００２２】
前記逆位相電流供給工程は、前記電力配電線に接続された変圧器を介して前記逆位相電流を供給することができる。[0022]
The anti-phase current supply process may supply the anti-phase current through a transformer connected to the power distribution line.
【００８０】
今、ｃ相の配電線４ｃに地絡故障が発生したとする。このとき、地絡事故検出装置１０では、計器用変流器７０から切り替えスイッチ４２を介して地絡電流Ｉｇのインピーダンス成分Ｉｇｚが検出される。そして、その検出されたインピーダンス成分Ｉｇｚと、地絡電流Ｉｇとの組み合わせにより、正弦波成分Ｉｇｓが算出される。[0080]
Now, it is assumed that a ground fault has occurred on distribution line 4c of phase c. At this time, in the ground
【０１２６】
【数１】
Ｒｏの１次側換算値Ｒは、
[Equation 1]
The primary side conversion value R of Ro is
【０１５４】
第１の判定回路８１では、入力された電圧Ｖｏが基準値Ｖよりも大きいか否かを判定する。微地絡の場合にはＲｇが大きく、ほぼ完全地絡の場合にはＲｇ≒０となるため、電圧Ｖｏはこれらの値の変化に伴って変化し、基準値Ｖとの比較により判定される。ここでは、電圧Ｖｏが基準値Ｖよりも大きい（Ｖｏ＞Ｖ）場合に地絡があったものとみなして信号を第２の判定回路８２に出力する。[0154]
The first determination circuit 81 determines whether or not the input voltage Vo is larger than the reference value V. In the case of a fine ground, Rg is large, and in the case of an almost complete ground, Rg 0 0. Therefore, the voltage Vo changes with changes in these values and is determined by comparison with the reference value V. . Here, when the voltage Vo is larger than the reference value V (Vo> V), a signal is output to the second determination circuit 82, assuming that there is a ground fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36167898A JP3778474B2 (en) | 1997-12-18 | 1998-12-18 | Ground fault suppression system and ground fault suppression method |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34983897 | 1997-12-18 | ||
| JP9-349838 | 1998-07-13 | ||
| JP19783698 | 1998-07-13 | ||
| JP10-197836 | 1998-07-13 | ||
| JP36167898A JP3778474B2 (en) | 1997-12-18 | 1998-12-18 | Ground fault suppression system and ground fault suppression method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000092698A JP2000092698A (en) | 2000-03-31 |
| JP2000092698A5 true JP2000092698A5 (en) | 2004-11-11 |
| JP3778474B2 JP3778474B2 (en) | 2006-05-24 |
Family
ID=27327424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36167898A Expired - Fee Related JP3778474B2 (en) | 1997-12-18 | 1998-12-18 | Ground fault suppression system and ground fault suppression method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3778474B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2538455T3 (en) * | 2007-01-26 | 2015-06-22 | Ormazabal Protection & Automation, S.L. | Active electronic grounding system for use in high voltage distribution networks |
| JP5455430B2 (en) * | 2009-05-12 | 2014-03-26 | 一般財団法人関東電気保安協会 | Leakage prevention monitoring system |
| CN103983899B (en) * | 2014-05-22 | 2016-08-31 | 国家电网公司 | Power distribution network permanent fault discrimination method based on Injection Signal |
| EP3506445B1 (en) * | 2017-12-27 | 2021-05-12 | ABB Schweiz AG | System for identification of a feeder with high-ohmic earth fault in a distribution network |
| CN115693630B (en) * | 2023-01-05 | 2023-04-25 | 国网山西省电力公司朔州供电公司 | Hybrid arc extinguishing system based on split winding and working method thereof |
-
1998
- 1998-12-18 JP JP36167898A patent/JP3778474B2/en not_active Expired - Fee Related
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