CN204681085U - The absorption earthed circuit of impedance ground can be reduced - Google Patents
The absorption earthed circuit of impedance ground can be reduced Download PDFInfo
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- CN204681085U CN204681085U CN201520421328.0U CN201520421328U CN204681085U CN 204681085 U CN204681085 U CN 204681085U CN 201520421328 U CN201520421328 U CN 201520421328U CN 204681085 U CN204681085 U CN 204681085U
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Abstract
The utility model discloses a kind of absorption earthed circuit that can reduce impedance ground, it comprises a ground network and several Absorption Capacitance devices, and the two ends after being in parallel between several Absorption Capacitance devices described are in series with described ground network and zero potential earth polar respectively.Its tool has the following advantages: improve the path condition that grounding net of transformer substation is released over the ground, and shock wave wave head absorbs, and reduces impedance ground; Earthing effect is good, and earth potential is low, simplicity of design, easy for installation, reliable operation and cost of manufacture low.
Description
Technical field
The utility model relates to a kind of earthed circuit, particularly relates to a kind of absorption earthed circuit that can reduce impedance ground.
Background technology
The electric installation of transformer station should be struck by lightning, and major part is in soil resistivity district higher, and the counterattack of its earth potential and shaft tower transient voltage raise, and have a strong impact on the safe operation of electric power system.
Traditional ground connection is laid in ground with metal material, is called earth connection or earth mat, since a nearly generation border, the mankind are on the basis of Ohm's law, with the voltage under linear condition, electric current theory, instruct, develop grounding technology, and to pursue lower earth resistance for target.But, in the process pursuing lower earth resistance, show from reports a large amount of both at home and abroad, the grounding system of a lower earth resistance is not most suitable grounding system, very big difference is had when the characteristic of earthing device under impulse current effect and power current effect, due to the impact of the perceptual weight of earthing device own, show obvious nonlinear time-varying characteristics.
For large-scale grounding network, its perceptual weight cannot be ignored, under the impulse current effects such as the lightning current containing high fdrequency component, the inductive effect of substation ground network is obvious, even play Main Function, lightning current cannot safe and effectively be released, and causes power high voltage power transmission and transformation system dynamic potentials to raise, and superpose with earth potential counterattack voltage, even more serious on the safe operation impact of electric power system.
Utility model content
The utility model provides a kind of absorption earthed circuit that can reduce impedance ground, which overcome in the existing grounding technology described in background technology, under lightning impulse, due to the inductive effect of ground network, lightning current cannot safe and effectively be released, cause the sharply rising of high voltage power transmission and transforming system transients current potential, and superpose with earth potential counterattack voltage, serious impact is caused on the safe operation of electric power system.
The utility model solves the technical scheme that its technical problem adopts:
Can reduce the absorption earthed circuit of impedance ground, it comprises a ground network and several Absorption Capacitance devices, and the two ends after being in parallel between several Absorption Capacitance devices described are in series with described ground network and zero potential earth polar respectively.
Among one embodiment: described Absorption Capacitance device comprises top crown and bottom crown, top crown and bottom crown are that parallel interval is arranged and electrical isolation, the top crown of several Absorption Capacitance devices described is connected with ground network, and the bottom crown of several capacitive means described is connected with zero potential earth polar.
Among one embodiment: described top crown and bottom crown adopt metal or non-metallic conducting material.
Among one embodiment: the top crown of described Absorption Capacitance device and bottom crown be level between the upper and lower every placement, the top crown of several capacitive means described is more than or equal to the fitting depth of ground network at underground fitting depth.
The technical program is compared with background technology, and its tool has the following advantages:
By increasing the parallel circuits connecting Absorption Capacitance device between ground network originally and zero potential region, the inductive effect produced with ground network in thunder and lightning situation in coming, improve the path condition that grounding net of transformer substation is released over the ground, shock wave wave head absorbs, and reduces impedance ground; Under different edaphic condition, this circuit all has the performance of good ground connection, particularly in high resistivity soil, has good earth effect, has earth potential low, simplicity of design, easy for installation, reliable operation and the low advantage of cost of manufacture.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 depicts structural representation of the present utility model.
Embodiment
Please refer to Fig. 1, the absorption earthed circuit of impedance ground can be reduced, it comprises ground network 10 and several Absorption Capacitance devices 20, and the two ends after being in parallel between several Absorption Capacitance devices 20 described are in series with described ground network 10 and zero potential earth polar 30 respectively.
Described Absorption Capacitance device 20 comprises top crown 21 and bottom crown 22, top crown 21 and bottom crown 22 are arranged and electrical isolation in parallel interval, the top crown 21 of several Absorption Capacitance devices 20 described is connected with ground network 10, and the bottom crown 22 of several capacitive means 20 described is connected with zero potential earth polar 30.
Described top crown 21 and bottom crown 22 adopt metal or non-metallic conducting material.
The top crown 21 of described Absorption Capacitance device 20 and bottom crown 22 are in level between the upper and lower every placement, and the top crown 21 of several capacitive means 20 described is more than or equal to the fitting depth of ground network 10 at underground fitting depth.
The above, be only the utility model preferred embodiment, therefore the scope that the utility model implements can not be limited according to this, the equivalence namely done according to the utility model the scope of the claims and description change with modify, all should still belong in scope that the utility model contains.
Claims (4)
1. can reduce the absorption earthed circuit of impedance ground, it is characterized in that: comprise a ground network and several Absorption Capacitance devices, the two ends after being in parallel between several Absorption Capacitance devices described are in series with described ground network and zero potential earth polar respectively.
2. the absorption earthed circuit that can reduce impedance ground according to claim 1, it is characterized in that: described Absorption Capacitance device comprises top crown and bottom crown, top crown and bottom crown are that parallel interval is arranged and electrical isolation, the top crown of several Absorption Capacitance devices described is connected with ground network, and the bottom crown of several capacitive means described is connected with zero potential earth polar.
3. the absorption earthed circuit that can reduce impedance ground according to claim 2, is characterized in that: described top crown and bottom crown adopt metal or non-metallic conducting material.
4. the absorption earthed circuit that can reduce impedance ground according to claim 2, it is characterized in that: the top crown of described Absorption Capacitance device and bottom crown be level between the upper and lower every placement, the top crown of several capacitive means described is more than or equal to the fitting depth of ground network at underground fitting depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520421328.0U CN204681085U (en) | 2015-06-17 | 2015-06-17 | The absorption earthed circuit of impedance ground can be reduced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520421328.0U CN204681085U (en) | 2015-06-17 | 2015-06-17 | The absorption earthed circuit of impedance ground can be reduced |
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| Publication Number | Publication Date |
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| CN204681085U true CN204681085U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520421328.0U Expired - Fee Related CN204681085U (en) | 2015-06-17 | 2015-06-17 | The absorption earthed circuit of impedance ground can be reduced |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868456A (en) * | 2015-06-17 | 2015-08-26 | 国家电网公司 | Absorption-type grounding circuit and method capable of reducing grounding impedance |
| CN106410442A (en) * | 2016-11-21 | 2017-02-15 | 武汉强宝科技有限公司 | Four-plus-one surge absorbing type grounding device |
| CN112147463A (en) * | 2020-09-25 | 2020-12-29 | 云南电网有限责任公司红河供电局 | Method and device for reducing grounding impedance of transformer substation grounding grid by additionally arranging capacitor module |
-
2015
- 2015-06-17 CN CN201520421328.0U patent/CN204681085U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868456A (en) * | 2015-06-17 | 2015-08-26 | 国家电网公司 | Absorption-type grounding circuit and method capable of reducing grounding impedance |
| CN106410442A (en) * | 2016-11-21 | 2017-02-15 | 武汉强宝科技有限公司 | Four-plus-one surge absorbing type grounding device |
| CN106410442B (en) * | 2016-11-21 | 2018-07-10 | 武汉强宝科技有限公司 | 4+1 sudden-wave absorbing formula earthing or grounding means |
| CN112147463A (en) * | 2020-09-25 | 2020-12-29 | 云南电网有限责任公司红河供电局 | Method and device for reducing grounding impedance of transformer substation grounding grid by additionally arranging capacitor module |
| CN112147463B (en) * | 2020-09-25 | 2022-11-04 | 云南电网有限责任公司红河供电局 | Method and device for reducing grounding impedance of transformer substation grounding grid by additionally arranging capacitor module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 |