CN107332198A - A kind of 110kV capacitor-voltage detecting devices - Google Patents
A kind of 110kV capacitor-voltage detecting devices Download PDFInfo
- Publication number
- CN107332198A CN107332198A CN201710651071.1A CN201710651071A CN107332198A CN 107332198 A CN107332198 A CN 107332198A CN 201710651071 A CN201710651071 A CN 201710651071A CN 107332198 A CN107332198 A CN 107332198A
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- China
- Prior art keywords
- capacitor
- voltage
- detecting devices
- voltage detecting
- transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0038—Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of 110kV capacitor-voltage detecting devices.It is included with reference to capacitor C, capacitor C1 and transformer L；Wherein：With reference to capacitor C one end be connected with 110kV supply lines B, the other end passes through capacitor C1Be connected with ground wire, the two ends of transformer L primary windings respectively with capacitor C1Two ends be connected, the two ends of transformer L secondary coils are voltage output end, wherein one end corresponding with primary winding earth terminal is output end U0, the other end be secondary side output end UB.The effect for the 110kV capacitor-voltage detecting devices that the present invention is provided：By changing the design wiring in 110kV capacitor-voltage detecting devices loop, same period relay miss operation can be prevented, the success rate of reclosing is improved, has ensured the reliability of power system power supply.
Description
Technical field
The invention belongs to high voltage power transmission and transforming technical field, more particularly to a kind of 110kV capacitor-voltage detecting devices.
Background technology
Automatic reclosing is the effective anti-accident measures being widely used in overhead line transmission of electricity and overhead line supply line.When
Circuit breaks down, and protective relaying device makes after circuit breaker trip, and auto recloser will can break after short time interval
Road, which is thought highly of, newly closes.In most cases, line fault (such as thunderbolt, windburn) is temporary, is moved by relay protection
Make after excision short trouble, automatic distinguishing, the in most cases insulation at short circuit can automatically be recovered, weighed again by electric arc
Closing can be successful, and this provides for improved the reliability of power system power supply.A few cases belong to permanent fault, and auto recloser is moved
Tripping again is acted by protective relaying device after work, ascertains the reason afterwards, is excluded power transmission again.Generally, line fault
Reclosing is faster after tripping operation, and effect is better.
In 110kV voltage class systems, in order to judge breaker both end voltage during automatic reclosing whether the same period, need
To be compared to one line voltage distribution of auto recloser.Generally sent using in line outlet one capacitance voltage of extraction
To same period relay, same period relay compares the voltage and the phase difference of busbar voltage, if angle is in relay setting model
In enclosing, then it is judged as the same period, the same period actuating of relay, auto recloser starts.Therefore a kind of capacitor-voltage detecting device is needed.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of 110kV capacitor-voltage detecting devices.
In order to achieve the above object, the 110kV capacitor-voltage detecting devices that the present invention is provided include：With reference to capacitor C, capacitor
C1 and transformer L；Wherein：With reference to capacitor C one end be connected with 110kV supply lines B, the other end passes through capacitor C1With
Ground wire is connected, the two ends of transformer L primary windings respectively with capacitor C1Two ends be connected, the two of transformer L secondary coils
Hold as voltage output end, wherein one end corresponding with primary winding earth terminal is output end U0, the other end be secondary side output
Hold UB.
The effect for the 110kV capacitor-voltage detecting devices that the present invention is provided：
Design wiring of the invention by changing 110kV capacitor-voltage detecting devices loop, can prevent the same period relay from refusing
Action, improves the success rate of reclosing, has ensured the reliability of power system power supply.
Brief description of the drawings
The schematic diagram for the 110kV capacitor-voltage detecting devices that Fig. 1 provides for the present invention.
Fig. 2 extracts voltage vector diagram for actual measurement.
Fig. 3 is the same period relay wiring figure that design department provides.
Fig. 4 is the correct wiring figure of same period relay.
Embodiment
The 110kV capacitor-voltage detecting devices provided below in conjunction with the accompanying drawings with specific embodiment the present invention are described in detail.
As shown in figure 1, the 110kV capacitor-voltage detecting devices that the present invention is provided include：
With reference to capacitor C, capacitor C1 and transformer L；Wherein：One end and 110kV supply lines B with reference to capacitor C
It is connected, the other end passes through capacitor C1Be connected with ground wire, the two ends of transformer L primary windings respectively with capacitor C1Two ends
It is connected, the two ends of transformer L secondary coils are voltage output end, wherein one end corresponding with primary winding earth terminal is defeated
Go out to hold U0, the other end be secondary side output end UB。
The operation principle for the 110kV capacitor-voltage detecting devices that the present invention is provided is as follows：
110kV supply lines B phases are by combining capacitor C and capacitor C1Ground connection, because 110kV supply lines have over the ground
Voltage, therefore a capacitance current Ic can be produced, capacitance current Ic flows through capacitor C1When can produce pressure drop Uc1, through transformer L
In secondary side output end U after transformationBOn obtain approximate 100V voltage.Through on-the-spot test, its vectogram is as shown in Figure 2：Wherein uB
For the secondary voltage extracted from supply line's B phases；ua、ub、ucFor 110kV buses PT secondary voltage.uab、ucaFor bus line electricity
Pressure.Figure it is seen that secondary voltage uBWith bus line voltage ucaIn the same direction, bus line voltage uabAdvanced secondary voltage uB
60°。
It is as shown in Figure 3 for the design wiring diagram of the capacitor-voltage detecting device of certain 6 outlet of 110kV transformer stations：
Voltage is compared for bus line voltage u for the same period relay of designabWith secondary voltage ub, due to bus line voltage
uabAdvanced secondary voltage uBThe synchronization minimum voltage angle of 60 °, i.e. same period relay is 60 °, if the angle of adjusting of same period relay is
40 °, then same period relay is by miss operation, and reclosing device will not also be overlapped.
The correct wiring of same period relay is as shown in Figure 4：
It is bus line voltage u that same period relay, which compares voltage,abWith uca, due to bus line voltage uabWith ucaIn the same direction, therefore together
The synchronization minimum voltage angle of phase relay is 0, and same period relay adjusts angle for 40 °, much larger than its synchronization minimum voltage angle, therefore, it is possible to
The action request of same period relay is met well.
Claims (1)
1. a kind of 110kV capacitor-voltage detecting devices, it is characterised in that：Described 110kV capacitor-voltage detecting devices include：With reference to capacitor
C, capacitor C1 and transformer L；Wherein：With reference to capacitor C one end be connected with 110kV supply lines B, the other end passes through electricity
Container C1Be connected with ground wire, the two ends of transformer L primary windings respectively with capacitor C1Two ends be connected, transformer L secondary lines
The two ends of circle are voltage output end, wherein one end corresponding with primary winding earth terminal is output end U0, the other end is secondary
Side output end UB。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651071.1A CN107332198A (en) | 2017-08-02 | 2017-08-02 | A kind of 110kV capacitor-voltage detecting devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651071.1A CN107332198A (en) | 2017-08-02 | 2017-08-02 | A kind of 110kV capacitor-voltage detecting devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107332198A true CN107332198A (en) | 2017-11-07 |
Family
ID=60200077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710651071.1A Pending CN107332198A (en) | 2017-08-02 | 2017-08-02 | A kind of 110kV capacitor-voltage detecting devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107332198A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627515Y (en) * | 2003-06-13 | 2004-07-21 | 鞍山华瑞继保电气有限公司 | Voltage extracting device |
| CN101188355A (en) * | 2007-11-29 | 2008-05-28 | 北京四方继保工程技术有限公司 | Method for converting the end electric screen current of mutual inductor into line voltage and insulation line monitoring device |
| CN103091546A (en) * | 2013-01-12 | 2013-05-08 | 辽宁省电力有限公司鞍山供电公司 | Voltage extracting device |
| CN205643476U (en) * | 2016-04-12 | 2016-10-12 | 珠海许继电气有限公司 | Outdoor zero sequence and phase sequence voltage measurement device |
-
2017
- 2017-08-02 CN CN201710651071.1A patent/CN107332198A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627515Y (en) * | 2003-06-13 | 2004-07-21 | 鞍山华瑞继保电气有限公司 | Voltage extracting device |
| CN101188355A (en) * | 2007-11-29 | 2008-05-28 | 北京四方继保工程技术有限公司 | Method for converting the end electric screen current of mutual inductor into line voltage and insulation line monitoring device |
| CN103091546A (en) * | 2013-01-12 | 2013-05-08 | 辽宁省电力有限公司鞍山供电公司 | Voltage extracting device |
| CN205643476U (en) * | 2016-04-12 | 2016-10-12 | 珠海许继电气有限公司 | Outdoor zero sequence and phase sequence voltage measurement device |
Non-Patent Citations (1)
| Title |
|---|
| 王国华: "用电压抽取装置检测35kV线路电压供备自投使用", 《继电器》 * |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |
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| RJ01 | Rejection of invention patent application after publication |