CN209046586U - A kind of photovoltaic plant reduces the structure of ground resistance - Google Patents

A kind of photovoltaic plant reduces the structure of ground resistance Download PDF

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Publication number
CN209046586U
CN209046586U CN201821731706.5U CN201821731706U CN209046586U CN 209046586 U CN209046586 U CN 209046586U CN 201821731706 U CN201821731706 U CN 201821731706U CN 209046586 U CN209046586 U CN 209046586U
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CN
China
Prior art keywords
photovoltaic
earth mat
over
counter portion
field
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Active
Application number
CN201821731706.5U
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Chinese (zh)
Inventor
胡振兴
杨韬
彭勇
杨毅伟
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Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
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Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
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Priority to CN201821731706.5U priority Critical patent/CN209046586U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The utility model relates to power station technical fields, disclose a kind of structure of photovoltaic plant reduction ground resistance.Including earth mat inside photovoltaic plant booster stations region earth mat, the over-the-counter portion's earth mat of photovoltaic, photovoltaic field, photovoltaic plant booster stations region earth mat is connect by two or more tie points with the over-the-counter portion's earth mat of photovoltaic, keep insulating between earth mat inside the over-the-counter portion's earth mat of the photovoltaic and photovoltaic field, across the over-the-counter portion's earth mat of photovoltaic and photovoltaic field inside three-core cable shielded layer is single-end earthed between earth mat.The technical solution of the utility model is provided with the over-the-counter portion's earth mat of a photovoltaic and internal earth mat, and the over-the-counter portion's earth mat of the photovoltaic is only used as the outer of photovoltaic plant booster stations earth mat to draw ground connection increase contact area, reduces ground resistance;Earth mat and external earth mat keep insulation inside photovoltaic field, reduce the investment of internal earth mat.

Description

A kind of photovoltaic plant reduces the structure of ground resistance
Technical field
The utility model relates to power station technical field, especially a kind of photovoltaic plant reduces the structure of ground resistance.
Background technique
The booster stations of photovoltaic plant are critical facilities in standing, and are disposed with voltage levels (110kV or more) power distribution equipment. When short circuit occurs for system, biggish earth current can be generally generated, grounded screen current potential is caused to increase.Especially in high soil electricity Resistance rate area, ground resistance is larger, and ground potential is higher when failure, and contact potential and step voltage are also higher, it is difficult to meet specification It is required that therefore corresponding measure must be taken to reduce ground resistance as far as possible so that contact potential and step voltage meet code requirement.
There are two types of the current method for reducing photovoltaic plant ground resistance is general: (1) by photovoltaic plant booster stations earth mat and light Volt place net connects, and ground resistance is reduced using the area that photovoltaic field increases, to make booster stations contact potential and stride Requirement is more easily satisfied in voltage, but such scheme can make photovoltaic place net be connected with booster stations earth mat, thus it requires photovoltaic Field areas also must satisfy the contact potential and step voltage limit value requirement in booster stations region, this needs larger investment for continuing Increase ground reticular density (being not necessarily able to satisfy requirement increasing) or beat deep-well etc..(2) booster stations earth mat and photovoltaic place Net separates, since electrical equipment is usually 35kV and following voltage class and without the outer neutral point of standing in photovoltaic field areas, this It is smaller to enter earth fault electric current when the generation short trouble of region, generally only 200 A to 400A, earth mat resistance is invested without increase to be held very much Easily just be able to satisfy requirement, but booster stations region due to area it is smaller, be difficult to meet the design requirement of contact potential and step voltage.
Utility model content
The goal of the invention of the utility model is: in view of the above problems, providing a kind of reduction of photovoltaic plant and connects The structure of ground resistance.
The technical solution adopted in the utility model is as follows: a kind of photovoltaic plant reduces the structure of ground resistance, including photovoltaic Power station booster stations region earth mat, the over-the-counter portion's earth mat of photovoltaic, earth mat inside photovoltaic field, photovoltaic plant booster stations region ground Netcom Two or more tie points are crossed to connect with the over-the-counter portion's earth mat of photovoltaic, inside the over-the-counter portion's earth mat of photovoltaic and photovoltaic field earth mat it Between keep insulation, across the over-the-counter portion's earth mat of photovoltaic and photovoltaic field inside three-core cable shielded layer is single-end earthed between earth mat.
Further, the structure that the photovoltaic plant reduces ground resistance further includes photovoltaic field interior metal equipment, described Photovoltaic field interior metal equipment ground end is connected to earth mat inside photovoltaic field.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
(1) the technical solution of the utility model be provided with the over-the-counter portion's earth mat of a photovoltaic, the over-the-counter portion's earth mat of the photovoltaic not with The equipment connection that need to be grounded reduces its ground connection electricity only as the outer area for drawing ground connection and increasing booster stations earth mat of booster stations earth mat Resistance, so as to meet the requirement of booster stations grounding grid design under investment few as far as possible.
(2) the technical solution of the utility model is provided with earth mat inside a photovoltaic field, is used for equipment ground in photovoltaic field, The earth mat need to keep insulating with the over-the-counter portion's earth mat of photovoltaic, since electrical equipment is 35kV and following equipment, the earth mat in the region Design requirement can be met in the case where investing very low situation.
Detailed description of the invention
Fig. 1 is that the photovoltaic plant of the utility model reduces the structural schematic diagram of ground resistance.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.
As shown in Figure 1, a kind of photovoltaic plant booster stations reduce the structure of ground resistance, including photovoltaic plant booster stations region The over-the-counter portion's earth mat 2 of earth mat 1, photovoltaic, earth mat 3 inside photovoltaic field, photovoltaic plant booster stations region earth mat 1 by two and with On tie point 4 connect with the over-the-counter portion's earth mat 2 of photovoltaic, kept between earth mat 3 inside the over-the-counter portion's earth mat 2 of the photovoltaic and photovoltaic field Insulation, single-end earthed across three-core cable shielded layer between the over-the-counter portion's earth mat 2 of photovoltaic and photovoltaic field inside earth mat 3.Pass through the party Method reduces booster stations region using the over-the-counter portion's earth mat of photovoltaic as the outer area for drawing ground connection and increasing booster stations earth mat of booster stations earth mat Ground resistance, and avoid earth mat inside photovoltaic field must satisfy booster stations region contact potential and step voltage limit value compared with High request, do not need photovoltaic field internally web area beat deep-well or increase mesh grounding pole density, reduce engineering cost.
Preferably, the structure that the photovoltaic plant booster stations reduce ground resistance further includes photovoltaic field interior metal equipment, Photovoltaic field interior metal equipment ground end is connected to earth mat inside photovoltaic field.Photovoltaic field internal unit can only by photovoltaic field or Photovoltaic field areas internal unit voltage class verifies contact potential, step voltage.Photovoltaic field or photovoltaic field areas externally net week Step voltage need to only be verified by enclosing.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (2)

1. the structure that a kind of photovoltaic plant reduces ground resistance, which is characterized in that including photovoltaic plant booster stations region earth mat, light Over-the-counter portion's earth mat, photovoltaic field inside earth mat are lied prostrate, photovoltaic plant booster stations region earth mat passes through two or more tie points It is connect with the over-the-counter portion's earth mat of photovoltaic, keeps insulating between earth mat inside the over-the-counter portion's earth mat of the photovoltaic and photovoltaic field, across photovoltaic Three-core cable shielded layer is single-end earthed between earth mat inside over-the-counter portion's earth mat and photovoltaic field.
2. the structure that photovoltaic plant as described in claim 1 reduces ground resistance, which is characterized in that the photovoltaic plant reduces The structure of ground resistance further includes photovoltaic field interior metal equipment, and photovoltaic field interior metal equipment ground end is connected to photovoltaic The internal earth mat in field.
CN201821731706.5U 2018-10-24 2018-10-24 A kind of photovoltaic plant reduces the structure of ground resistance Active CN209046586U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821731706.5U CN209046586U (en) 2018-10-24 2018-10-24 A kind of photovoltaic plant reduces the structure of ground resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821731706.5U CN209046586U (en) 2018-10-24 2018-10-24 A kind of photovoltaic plant reduces the structure of ground resistance

Publications (1)

Publication Number Publication Date
CN209046586U true CN209046586U (en) 2019-06-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821731706.5U Active CN209046586U (en) 2018-10-24 2018-10-24 A kind of photovoltaic plant reduces the structure of ground resistance

Country Status (1)

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CN (1) CN209046586U (en)

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