CN204681084U - A kind of absorption earthed circuit that can reduce impedance ground - Google Patents

A kind of absorption earthed circuit that can reduce impedance ground Download PDF

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Publication number
CN204681084U
CN204681084U CN201520421327.6U CN201520421327U CN204681084U CN 204681084 U CN204681084 U CN 204681084U CN 201520421327 U CN201520421327 U CN 201520421327U CN 204681084 U CN204681084 U CN 204681084U
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China
Prior art keywords
crown
absorption
ground
earthed circuit
impedance ground
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CN201520421327.6U
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Chinese (zh)
Inventor
庄建煌
戴争鸣
林明星
纪彦巧
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State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Putian Power Supply Co of State Grid Fujian Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Putian Power Supply Co of State Grid Fujian Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Fujian Electric Power Co Ltd, Putian Power Supply Co of State Grid Fujian Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201520421327.6U priority Critical patent/CN204681084U/en
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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 an Absorption Capacitance device, and the two ends of described Absorption Capacitance device are connected with zero potential earth polar with described ground network 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

A kind of absorption earthed circuit that can reduce impedance ground
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 an absorption earthed circuit for impedance ground, it comprises a ground network and an Absorption Capacitance device, and the two ends of described Absorption Capacitance device are connected with zero potential earth polar with described ground network 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, and described top crown is connected with ground network, and described bottom crown 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, top crown 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 connection one Absorption Capacitance device between ground network originally and zero potential region, in order in and thunder and lightning situation under ground network produce inductive effect, 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, a kind of absorption earthed circuit that can reduce impedance ground, it comprises ground network 10 and an Absorption Capacitance device 20, and the two ends of described Absorption Capacitance device 20 are connected with zero potential earth polar 30 with described ground network 10 respectively.
Described Absorption Capacitance device 20 comprises top crown 21 and bottom crown 22, and top crown 21 and bottom crown 22 are arranged and electrical isolation in parallel interval, and described top crown 21 is connected with ground network 10, and described bottom crown 22 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 of described Absorption Capacitance device 20 and bottom crown be level between the upper and lower every placement, top crown 21 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 an absorption earthed circuit for impedance ground, it is characterized in that: comprise a ground network and an Absorption Capacitance device, the two ends of described Absorption Capacitance device are connected with zero potential earth polar with described ground network respectively.
2. a kind of 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, described top crown is connected with ground network, and described bottom crown is connected with zero potential earth polar.
3. a kind of 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. a kind of 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, top crown is more than or equal to the fitting depth of ground network at underground fitting depth.
CN201520421327.6U 2015-06-17 2015-06-17 A kind of absorption earthed circuit that can reduce impedance ground Active CN204681084U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520421327.6U CN204681084U (en) 2015-06-17 2015-06-17 A kind of absorption earthed circuit that can reduce impedance ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520421327.6U CN204681084U (en) 2015-06-17 2015-06-17 A kind of absorption earthed circuit that can reduce impedance ground

Publications (1)

Publication Number Publication Date
CN204681084U true CN204681084U (en) 2015-09-30

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901211A (en) * 2015-06-17 2015-09-09 国家电网公司 Absorption type grounding circuit and method for reducing grounding impedance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901211A (en) * 2015-06-17 2015-09-09 国家电网公司 Absorption type grounding circuit and method for reducing grounding impedance

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