CN104052045A - Composite power voltage absorbing device - Google Patents
Composite power voltage absorbing device Download PDFInfo
- Publication number
- CN104052045A CN104052045A CN201410240764.8A CN201410240764A CN104052045A CN 104052045 A CN104052045 A CN 104052045A CN 201410240764 A CN201410240764 A CN 201410240764A CN 104052045 A CN104052045 A CN 104052045A
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- CN
- China
- Prior art keywords
- fuse
- voltage
- overvoltage
- arc grounding
- isolation handcart
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Abstract
The invention provides a composite power voltage absorbing device, and relates to the technical field of electricity. The device comprises an isolation handcart, the wire inlet end of the isolation handcart is connected with a three-phase main bus, the wire outlet end of the isolation handcart is divided into three paths, the first path is connected with a voltage mutual inductor through a first fuse, the voltage mutual inductor is grounded through an earthing switch, the second path is connected with a vacuum contactor through a second fuse, the vacuum contactor is grounded through a current mutual inductor, the third path is grounded through a first resistor, a first capacitor and a discharge tube, the first capacitor is connected with a second capacitor in parallel, when arc grounding happens in a power system, arc grounding is converted into metal grounding within 30 ms, and arc grounding overvoltage is limited at the level of line voltage. The device is stable and quick in motion and can well limit the arc grounding overvoltage, resonance overvoltage, operation overvoltage and atmospheric overvoltage.
Description
Technical field
The present invention relates to technical field of electricity, be specifically related to a kind of compound voltage of power absorption plant.
Background technology
At present, what the electric power system great majority of China 3～35KV adopted is isolated neutral operational mode, and this operational mode allows the short time to operate with failure in the time of single-phase earthing, thereby has greatly improved the power supply reliability of system.But along with the development of electrical network, overhead transmission line is progressively replaced by the cable line of solid insulation.Due to the build-up effect that solid insulation punctures, its internal overvoltage, the arc grounding overvoltage particularly producing when electrical network generation single-phase intermittent arc earthing and the ferro-resonance over-voltage exciting thus, become one of this class electric power netting safe running and threatened greatly.Wherein serious with single-phase arc grounding overvoltage, it is saturated that arc grounding overvoltage can make voltage transformer occur, and excites ferro resonance, causes voltage transformer seriously to transship, and causes fuse blows or instrument transformer to burn.Because the arc grounding overvoltage duration is long, energy very easily exceedes the ability to bear of lightning arrester, causes Explosion of on Arrester.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of safety, stable compound voltage of power absorption plant of using.
Technical problem to be solved by this invention realizes by the following technical solutions:
A kind of compound voltage of power absorption plant, comprise isolation handcart, the inlet wire termination three-phase main bus bar of described isolation handcart, the leading-out terminal of described isolation handcart is divided into three tunnels, the first via connects voltage transformer through the first fuse, described voltage transformer is through ground switch earthing, second tunnel the second fuse is through vacuum contactor, described vacuum contactor is through current transformer ground connection, Third Road is through the first resistance, the first electric capacity and discharge tube ground connection, on described the first electric capacity, be parallel with the second electric capacity, in the time of electric power system generation arc grounding, in 30ms, arc grounding is converted into metallic earthing, by arc grounding overvoltage Limiting on-Line Voltage level.
On described the second fuse, be parallel with the 3rd fuse.
Eliminate atmospheric over-voltage and switching overvoltage by the resistance, electric capacity and the discharge tube that are cascaded; After ferro resonance, single phase ground fault are eliminated, three-phase voltage restores balance or when intermittent arc grounding, smart grounding K switch instantaneous operation, greatly reduce the impact of capacitance current to voltage transformer pt, avoid voltage transformer pt to burn out and the problem of fuse failure.
The invention has the beneficial effects as follows: the present invention not only having stable behavior is quick, and can well limit arc grounding overvoltage, resonance overvoltage, switching overvoltage, atmospheric over-voltage.
Brief description of the drawings
Fig. 1 is principle of the invention block diagram.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, a kind of compound voltage of power absorption plant, comprise isolation handcart GL, the inlet wire termination three-phase main bus bar of isolation handcart GL, the leading-out terminal of isolation handcart GL is divided into three tunnels, the first via connects voltage transformer pt through the first fuse FU1, voltage transformer pt is through earthed switch K ground connection, second tunnel the second fuse FU2 is through vacuum contactor ZJ, vacuum contactor ZJ is through Current Transmit ground connection, Third Road is through the first resistance R 1, the first capacitor C 1 and discharge tube F1 ground connection, in the first capacitor C, be parallel with the second capacitor C 2, on the second fuse FU2, be parallel with the 3rd fuse FU3, in the time of electric power system generation arc grounding, in 30ms, arc grounding is converted into metallic earthing, by arc grounding overvoltage Limiting on-Line Voltage level.
Eliminate atmospheric over-voltage and switching overvoltage by the resistance, electric capacity and the discharge tube that are cascaded; After ferro resonance, single phase ground fault are eliminated, three-phase voltage restores balance or when intermittent arc grounding, smart grounding K switch instantaneous operation, greatly reduce the impact of capacitance current to voltage transformer pt, avoid voltage transformer pt to burn out and the problem of fuse failure.
More than show and described general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. a compound voltage of power absorption plant, it is characterized in that: comprise isolation handcart, the inlet wire termination three-phase main bus bar of described isolation handcart, the leading-out terminal of described isolation handcart is divided into three tunnels, the first via connects voltage transformer through the first fuse, described voltage transformer is through ground switch earthing, second tunnel the second fuse is through vacuum contactor, described vacuum contactor is through current transformer ground connection, Third Road is through the first resistance, the first electric capacity and discharge tube ground connection, on described the first electric capacity, be parallel with the second electric capacity, in the time of electric power system generation arc grounding, in 30ms, arc grounding is converted into metallic earthing, by arc grounding overvoltage Limiting on-Line Voltage level.
2. compound voltage of power absorption plant according to claim 1, is characterized in that: on described the second fuse, be parallel with the 3rd fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240764.8A CN104052045A (en) | 2014-05-30 | 2014-05-30 | Composite power voltage absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240764.8A CN104052045A (en) | 2014-05-30 | 2014-05-30 | Composite power voltage absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104052045A true CN104052045A (en) | 2014-09-17 |
Family
ID=51504579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410240764.8A Pending CN104052045A (en) | 2014-05-30 | 2014-05-30 | Composite power voltage absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052045A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821491A (en) * | 2015-05-25 | 2015-08-05 | 舒尔环保科技（合肥）有限公司 | RC circuit |
| CN112083325A (en) * | 2020-08-13 | 2020-12-15 | 安徽明玑电力设备有限公司 | Circuit of voltage transformer fuse combined electrical apparatus |
-
2014
- 2014-05-30 CN CN201410240764.8A patent/CN104052045A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821491A (en) * | 2015-05-25 | 2015-08-05 | 舒尔环保科技（合肥）有限公司 | RC circuit |
| CN112083325A (en) * | 2020-08-13 | 2020-12-15 | 安徽明玑电力设备有限公司 | Circuit of voltage transformer fuse combined electrical apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |
|
| WD01 | Invention patent application deemed withdrawn after publication |