CN202563065U - Opening and closing period on-line detection device for electric power switch cabinet breaker - Google Patents
Opening and closing period on-line detection device for electric power switch cabinet breaker Download PDFInfo
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- CN202563065U CN202563065U CN 201220052600 CN201220052600U CN202563065U CN 202563065 U CN202563065 U CN 202563065U CN 201220052600 CN201220052600 CN 201220052600 CN 201220052600 U CN201220052600 U CN 201220052600U CN 202563065 U CN202563065 U CN 202563065U
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Abstract
The utility model discloses an opening and closing period on-line detection device for an electric power switch cabinet breaker, solving the problems that the existing on-line detection device and method are highly random in detection, unreasonable in signal processing and inaccurate in detection result. The electric power switch cabinet breaker opening and closing period on-line detection device comprises a Hall current, an opening and closing coil Hall current sensor output conditioning circuit, a high-frequency signal coupling circuit, a high-frequency signal decoupling circuit, a microprocessor, an audible and visual alarm unit and a communication unit, wherein a high-frequency signal is coupled with one end of breaker main loop three-phase movable and fixed contacts, and the other end is respectively decoupled with the high-frequency signal; the opening and closing period on-line detection is finished by means of processing through an electric power switch cabinet breaker opening and closing period on-line detection program which is solidified by the microprocessor; and the on-line detection of three-phase synchronism for the breaker can also be finished. The opening and closing period on-line detection device for an electric power switch cabinet breaker has no requirement for changing of the original device structure and has no influence on the performance of a high voltage switch cabinet when the opening and closing period on-line detection device for an electric power switch cabinet breaker detects a high voltage cabinet breaker.
Description
Technical field
The present invention relates to a kind of on-line measuring device of power switch cabinet breaker, the on-line measuring device in particularly a kind of power switch cabinet circuit-breaker switching on-off cycle.
Background technology
For a long time; The power switch cabinet breaker happens occasionally because of the accident that mechanical property degenerates, the isolating switch three-phase does not cause the same period; Need adopt the breaker mechanic property on-line measuring device to detect for this reason; But existing circuit breaker mechanical property detector is offline inspection, must after isolating switch is stopped transport, just can implement to detect.Breaker mechanic property can not realize that the reason of online detection is many, and its main cause is that difficult quilt of divide-shut brake cycle accurately detects under the fuser belt electricity condition.At present; Circuit-breaker switching on-off periodic on-line detection method mainly contains three kinds; A kind of method is to utilize Hall current sensor to combine to detect with current transformer; When utilizing circuit-breaker switching on-off the current vanishes of isolating switch major loop constantly or flow through electric current and confirm the firm branch of isolating switch dynamic/static contact or just conjunction constantly, though this method can be carried out online detection to the circuit-breaker switching on-off cycle more exactly, isolating switch not under the situation of on-load this method can't implement; Second method is to utilize the auxiliary contact of Hall current sensor and isolating switch to detect; Utilize the isolating switch auxiliary contact to confirm that switch just divides, the firm conjunction; Because the isolating switch auxiliary contact is a mechanical contact; Its action is not the synchronous of strictness with the isolating switch action, therefore, has very big sum of errors randomness.The third method is to adopt Hall current sensor and vibration transducer to detect; Through the circuit-breaker switching on-off vibration signal is analyzed, confirmed that the maximal value of vibration signal in the circuit-breaker switching on-off process is corresponding to the firm branch of circuit-breaker switching on-off, the firm conjunction, therefore; Extract maximal value in the circuit-breaker switching on-off process and just can confirm the firm branch of switch divide-shut brake, just conjunction; But the isolating switch vibration signal is relevant with the isolating switch installation site, and the isolating switch vibration signal was also inequality when different positions was installed, and vibration signal is difficult for handling; So this method does not possess operability.
Summary of the invention
The invention provides a kind of power switch cabinet circuit-breaker switching on-off periodic on-line pick-up unit, it is big to have solved the measurement randomness that existing on-line measuring device and method exist, signal Processing unreasonable with problems such as testing result is inaccurate.
The present invention overcomes the above problems through following scheme:
A kind of power switch cabinet circuit-breaker switching on-off periodic on-line pick-up unit comprises Hall current sensor, switching winding Hall current sensor output modulate circuit, closing coil Hall current sensor output modulate circuit, high-frequency signal coupled circuit, high-frequency signal decoupling zero circuit, microprocessor, acousto-optic warning unit and communication unit.Hall current sensor U wherein
6Primary side series connection is arranged in the switching winding loop in the divide-shut brake control circuit of isolating switch, Hall current sensor U
6Two output terminals be connected in parallel on resistance R
5Two ends, resistance R
5One end and Schmidt's wave shaping chip U
2Input end connect resistance R
5Other end ground connection, Schmidt's wave shaping chip U
2Output terminal and microprocessor U
1External interrupt 1 pin XINT1 connects, another Hall current sensor U
7The primary side series connection is arranged in the closing coil loop in the circuit-breaker switching on-off control circuit Hall current sensor U
7Two output terminals be connected in parallel on resistance R
6Two ends, resistance R
6One end and another Schmidt's wave shaping chip U
3Input end connects, resistance R
6Other end ground connection, Schmidt's wave shaping chip U
3Output terminal and microprocessor U
1External interrupt 2 pin XINT2 connect, microprocessor U
1An I/O pin GPIOA0 pass through R
2With high frequency light electric coupler U
4Input end connects, high frequency light electric coupler U
4One end of output and+5V power supply V
CCBe connected to an end of high-frequency signal isolating transformer T1 primary coil after linking to each other, high-frequency signal isolating transformer T
1The other end of primary coil passes through resistance R
1With high frequency light electric coupler U
4Ground connection after the other end of output links to each other, high-frequency signal isolating transformer T
1One end of secondary coil is through electric power coupling condenser C
1Connect high-frequency signal isolating transformer T with an end A of a certain dynamic/static contact of vacuum tube mutually in the isolating switch major loop
1The other end of secondary coil is through telefault L
1Ground connection, the other end a of this phase vacuum tube dynamic/static contact is through electric power decoupling capacitance device C in the isolating switch major loop
2With high-frequency signal isolating transformer T
2One end of primary coil connects, high-frequency signal isolating transformer T
2The other end of primary coil is through telefault L
2Ground connection, high-frequency signal isolating transformer T
2Secondary coil and high frequency light electric coupler U
5Input end connects, high frequency light electric coupler U
5One end of output and+3.3V power supply V
CCBe connected to microprocessor U after linking to each other
1Capturing unit CAP1 pin, high frequency light electric coupler U
5The other end of output passes through resistance R
4Ground connection.
At high-frequency signal isolating transformer T
1The two ends of secondary coil are parallel with explosion stack D
1, at another high-frequency signal isolating transformer T
2The two ends of primary coil are parallel with another explosion stack D
2
A kind of power switch cabinet circuit-breaker switching on-off periodic on-line detection method may further comprise the steps:
The first step: with Hall current sensor U
6Primary side is connected in the switching winding loop in the circuit-breaker switching on-off control circuit;
Second step: with Hall current sensor U
6The breaker open operation coil that obtains gets the electric moment, and promptly the initial moment in breaker open operation cycle sends microprocessor U to
1, microprocessor U
1Get the electric high-frequency signal that sends simultaneously at the breaker open operation coil;
The 3rd step: the high-frequency signal that the last step obtains is through high frequency light electric coupler, high-frequency signal isolating transformer T
1With coupling capacitance C
1This high-frequency signal is superimposed upon an end of A phase dynamic/static contact in the isolating switch major loop Deng the high-frequency signal coupled circuit of element composition;
The 4th step: the other end of A phase dynamic/static contact passes through by high frequency light electric coupler U in the isolating switch major loop
5, high-frequency signal isolating transformer T
2With coupling capacitance C
2The high-frequency signal decoupler of forming Deng element comes out high-frequency signal decoupling zero from the high pressure power frequency component and transfers to microprocessor U
1Capturing unit CAP1 pin;
The 5th step: the installation process that went on foot for the 4th step by repetition shown in Figure 6 second is installed isolating switch B phase and C high-frequency signal coupled circuit and high-frequency signal decoupling zero circuit mutually respectively;
The 6th step: microprocessor U
1Through to Hall current sensor U
6The high-frequency signal that output signal and the 4th step decoupling zero go out is handled calculating, draws the separating brake cycle and the separating brake asynchrony of isolating switch;
The 7th step: with another Hall current sensor U
7Primary side is connected in the closing coil loop in the circuit-breaker switching on-off control circuit, and the step that repetition second went on foot for the 6th step can draw isolating switch A phase, B phase and the C combined floodgate cycle and the not same sex of closing a floodgate mutually respectively.
The present invention provide a kind of simple in structure, easy for installation, measure accurately.Save switch cubicle isolating switch idle time, improved the reliability of power system power supply.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a switching winding Hall current sensor output modulate circuit schematic diagram of the present invention;
Fig. 3 is a closing coil Hall current sensor output modulate circuit schematic diagram of the present invention;
Fig. 4 is a high-frequency signal coupled circuit schematic diagram of the present invention;
Fig. 5 is high-frequency signal decoupling zero circuit theory diagrams of the present invention.
Specific embodiment
Apparatus of the present invention comprise Hall current sensor, switching winding Hall current sensor output modulate circuit, closing coil Hall current sensor output modulate circuit, high-frequency signal coupled circuit, high-frequency signal decoupling zero circuit, microprocessor, acousto-optic warning unit and communication unit.The Hall current sensor response time wherein is in the microsecond level; Therefore can comparatively fast and exactly obtaining the circuit-breaker switching on-off coil, to get the electric time be the initial moment in divide-shut brake cycle, and the current signal that switching winding Hall current sensor output modulate circuit and closing coil Hall current sensor output modulate circuit are exported Hall current sensor is through sample resistance R
1Or R
2, current signal is converted into voltage signal, voltage signal both can reach and eliminate the effect of disturbing after shaping behind Schmidt's chip, can provide one again for the external interrupt of microprocessor preferably along trigger pip.
The high-frequency signal coupled circuit: its effect is that the low-voltage high-frequency signal that produces is coupling in the high pressure power frequency component of a certain phase dynamic/static contact one end of isolating switch, realizes the high-low pressure Signal Spacing.Wherein the input of photoelectricity coupling chip connects the I/O pin of microprocessor; The pulse signal that microprocessor is produced is sent to the high-frequency isolation transformer primary coil after photoelectricity is isolated; For preventing that attenuation from can't receive, high-frequency signal is amplified at the collector side adding+5V power supply of photoelectricity coupling chip output triode; Coupled circuit medium-high frequency Signal Spacing transformer T
1Realized the strong and weak electricity isolation, the high-frequency signal after it will amplify is sent to the electric power coupling condenser C of secondary coil from primary coil
1, electric power coupling condenser C
1Can high-frequency signal be coupled in the high pressure industrial-frequency alternating current and stop the high pressure power frequency component to be delivered on the high-frequency isolation transformer; Inductance L in the coupled circuit
1Prevented effectively in the high-frequency signal inflow place, and can the power frequency component of sending here through coupling capacitance be sent in the ground, low voltage electrical equipment has been caused damage thereby avoided the power frequency high voltage signal to reach low pressure end; When it implements the monitoring installation; High-frequency signal coupled circuit input end links to each other with microprocessor; In the moving major loop of high-frequency signal coupled circuit output terminal and isolating switch one mutually an end of vacuum tube dynamic/static contact link to each other, a terminal of high-frequency signal coupled circuit input links to each other the another terminal digital grounding with the I/O of microprocessor; In one terminal of high-frequency signal coupled circuit output and the isolating switch major loop one mutually a terminal of vacuum tube dynamic/static contact link to each other the another terminal analogue ground.
To described high-frequency signal decoupling zero circuit: its effect is that the high-frequency signal that is coupling in a certain phase dynamic/static contact one end in isolating switch major loop decoupling zero from the high pressure power frequency component of the dynamic/static contact other end is come out.Electric power decoupling capacitance device C wherein
2Terminal is installed in the other end that corresponding high-frequency signal coupled circuit connects phase, and its effect is that high-frequency signal is come out to be delivered to high-frequency isolation transformer T from the decoupling zero of high pressure power frequency component
2One end of primary coil, thus realized the high-low pressure voltage isolation; High-frequency isolation transformer T
2The other end of primary coil is through inductor L
2Ground connection, inductor L
2Stoped high-frequency signal to import the earth into, and the high pressure power frequency component that will import into insert the earth; High-frequency isolation transformer T
2The high-frequency signal of decoupling zero is sent to the low-voltage end secondary coil from the high voltage end primary coil, has realized the isolation of high low-voltage; High-frequency isolation transformer T
2Secondary coil is sent to high-frequency signal the capturing unit of microprocessor after the high frequency light electric coupler carries out electrical isolation and level conversion.
Can be provided with acousto-optic warning unit among the present invention, its effect is to issue out sound and light alarm two kinds of situation: the one, and the circuit-breaker switching on-off cycle exceeds permissible value, and the 2nd, when exceeding permissible value, isolating switch three-phase asynchrony reports to the police.
Can be provided with communication unit among the present invention, its effect is to set up many switch cubicle circuit-breaker switching on-off periodic on-line checkout equipment networks easily, is convenient to data sharing.
To having solidified a power switch cabinet circuit-breaker switching on-off periodic on-line trace routine in the described microprocessor, comprise initialize routine, external interrupt handling procedure, frequency signal acquisition process program, timer processing program, sound and light alarm program and communication program.External interrupt 1 handling procedure has been accomplished the timing of separating brake cycle starting point, makes microprocessor send high-frequency signal simultaneously, and enables capturing unit and begin to carry out step-by-step counting; External interrupt 2 handling procedures have been accomplished the timing of combined floodgate cycle starting point, make microprocessor send high-frequency signal simultaneously, and enable timer and pick up counting and enable capture interrupt simultaneously, when capturing unit captures first pulse, stop the timer timing; The frequency signal capture program has been accomplished frequency collection calculating and the frequency signal and the corresponding relation processing of divide-shut brake cycle of signal; The timer processing program has accomplished the combined floodgate cycle and timer counting corresponding relation calculates; During the separating brake cycle monitoring, get initial moment in separating brake cycle when electric at switching winding, start the capturing unit counter through microprocessor external interrupt 1 and begin to carry out step-by-step counting until the firm timesharing of isolating switch, counting stopped when high-frequency signal can't transmit; During the combined floodgate cycle monitoring, get initial moment in the cycle of closing a floodgate when electric at closing coil, start timer internals through microprocessor external interrupt 2 and pick up counting just fashionablely until isolating switch, the timer timing stopped when microprocessor captured first pulse signal; Warning function when the sound and light alarm program can realize that divide-shut brake cycle and isolating switch three-phase do not meet on-the-spot standard the same period, 485 communication programs have been accomplished this monitoring device and have been connected and data sharing with being incorporated into the power networks of other monitoring device.
Pick-up unit of the present invention has been eliminated other pick-up unit complex structure, signal Processing is unreasonable and big at random shortcoming.Its principal feature is through the end difference couples high frequency signals at isolating switch major loop three-phase dynamic/static contact; The other end in corresponding phase carries out the high-frequency signal decoupling zero respectively, realizes that the divide-shut brake periodic on-line detects, and can realize the online detection of isolating switch three-phase asynchrony; When this device is implemented to detect to the high-voltage board isolating switch; The original device structure need not change, does not influence the various performances of high-tension switch cabinet, and particularly its insulativity is not affected.This device adopts conventional element and material; Cost is low, and industrial realization is convenient, is the more complete switch cubicle circuit-breaker switching on-off periodic on-line pick-up unit of function ratio comparatively practical in a kind of industry; Thereby reduce switch cubicle isolating switch idle time, improved the power system power supply reliability.
Claims (2)
1. power switch cabinet circuit-breaker switching on-off periodic on-line pick-up unit; Comprise Hall current sensor, switching winding Hall current sensor output modulate circuit, closing coil Hall current sensor output modulate circuit, high-frequency signal coupled circuit, high-frequency signal decoupling zero circuit, microprocessor, acousto-optic warning unit and communication unit; It is characterized in that Hall current sensor U
6Primary side series connection is arranged in the switching winding loop in the divide-shut brake control circuit of isolating switch, Hall current sensor U
6Two output terminals be connected in parallel on resistance R
5Two ends, resistance R
5One end and Schmidt's wave shaping chip U
2Input end connect resistance R
5Other end ground connection, Schmidt's wave shaping chip U
2Output terminal and microprocessor U
1External interrupt 1 pin XINT1 connects, another Hall current sensor U
7The primary side series connection is arranged in the closing coil loop in the circuit-breaker switching on-off control circuit Hall current sensor U
7Two output terminals be connected in parallel on resistance R
6Two ends, resistance R
6One end and another Schmidt's wave shaping chip U
3Input end connects, resistance R
6Other end ground connection, Schmidt's wave shaping chip U
3Output terminal and microprocessor U
1External interrupt 2 pin XINT2 connect, microprocessor U
1An I/O pin GPIOA0 pass through R
2With high frequency light electric coupler U
4Input end connects, high frequency light electric coupler U
4One end of output and+5V power supply V
CCBe connected to an end of high-frequency signal isolating transformer T1 primary coil after linking to each other, high-frequency signal isolating transformer T
1The other end of primary coil passes through resistance R
1With high frequency light electric coupler U
4Ground connection after the other end of output links to each other, high-frequency signal isolating transformer T
1One end of secondary coil is through electric power coupling condenser C
1Connect high-frequency signal isolating transformer T with an end A of a certain dynamic/static contact of vacuum tube mutually in the isolating switch major loop
1The other end of secondary coil is through telefault L
1Ground connection, the other end a of this phase vacuum tube dynamic/static contact is through electric power decoupling capacitance device C in the isolating switch major loop
2With high-frequency signal isolating transformer T
2One end of primary coil connects, high-frequency signal isolating transformer T
2The other end of primary coil is through telefault L
2Ground connection, high-frequency signal isolating transformer T
2Secondary coil and high frequency light electric coupler U
5Input end connects, high frequency light electric coupler U
5One end of output and+3.3V power supply V
CCBe connected to microprocessor U after linking to each other
1Capturing unit CAP1 pin, high frequency light electric coupler U
5The other end of output passes through resistance R
4Ground connection.
2. a kind of power switch cabinet circuit-breaker switching on-off periodic on-line pick-up unit according to claim 1 is characterized in that, at high-frequency signal isolating transformer T
1The two ends of secondary coil be parallel with explosion stack D
1, at another high-frequency signal isolating transformer T
2The two ends of primary coil be parallel with another explosion stack D
2
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220052600 CN202563065U (en) | 2012-02-18 | 2012-02-18 | Opening and closing period on-line detection device for electric power switch cabinet breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220052600 CN202563065U (en) | 2012-02-18 | 2012-02-18 | Opening and closing period on-line detection device for electric power switch cabinet breaker |
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| CN202563065U true CN202563065U (en) | 2012-11-28 |
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| CN 201220052600 Expired - Lifetime CN202563065U (en) | 2012-02-18 | 2012-02-18 | Opening and closing period on-line detection device for electric power switch cabinet breaker |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590739A (en) * | 2012-02-18 | 2012-07-18 | 山西省电力公司晋城供电分公司 | On-line detecting device and detecting method for switch-on and switch-off period of power switch cabinet circuit breaker |
| CN105047453A (en) * | 2015-07-02 | 2015-11-11 | 国家电网公司 | Circuit breaker operation control instrument for circuit breaker on-off time control and operation method |
| CN105182229A (en) * | 2015-09-22 | 2015-12-23 | 郑贵林 | Electric power switch action time dynamic measurement method and application, and electric power switch AC zero crossing point accurate control method and application |
| CN105891705A (en) * | 2016-03-15 | 2016-08-24 | 国家电网公司 | Detection system of a circuit breaker |
| CN108896865A (en) * | 2018-09-11 | 2018-11-27 | 奇瑞汽车股份有限公司 | The fuse of automobile determines method, apparatus and storage medium |
| CN113267722A (en) * | 2021-05-20 | 2021-08-17 | 国网安徽省电力有限公司检修分公司 | Method and system for testing double-end grounding opening and closing time of high-voltage circuit breaker |
| CN113341309A (en) * | 2021-05-10 | 2021-09-03 | 广西电网有限责任公司电力科学研究院 | Device and method for detecting three-phase closing synchronization and contact bounce of circuit breaker |
-
2012
- 2012-02-18 CN CN 201220052600 patent/CN202563065U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590739A (en) * | 2012-02-18 | 2012-07-18 | 山西省电力公司晋城供电分公司 | On-line detecting device and detecting method for switch-on and switch-off period of power switch cabinet circuit breaker |
| CN102590739B (en) * | 2012-02-18 | 2014-04-16 | 山西省电力公司晋城供电分公司 | On-line detecting device for switch-on and switch-off period of power switch cabinet circuit breaker |
| CN105047453A (en) * | 2015-07-02 | 2015-11-11 | 国家电网公司 | Circuit breaker operation control instrument for circuit breaker on-off time control and operation method |
| CN105182229A (en) * | 2015-09-22 | 2015-12-23 | 郑贵林 | Electric power switch action time dynamic measurement method and application, and electric power switch AC zero crossing point accurate control method and application |
| WO2017049907A1 (en) * | 2015-09-22 | 2017-03-30 | 郑贵林 | Dynamic power switch action time measurement and precise alternating-current zero crossing point control method and application |
| CN105182229B (en) * | 2015-09-22 | 2018-06-29 | 郑贵林 | The dynamic measurement of power switch actuation time and ac zero-crossing point accuracy control method and application |
| CN105891705A (en) * | 2016-03-15 | 2016-08-24 | 国家电网公司 | Detection system of a circuit breaker |
| CN108896865A (en) * | 2018-09-11 | 2018-11-27 | 奇瑞汽车股份有限公司 | The fuse of automobile determines method, apparatus and storage medium |
| CN113341309A (en) * | 2021-05-10 | 2021-09-03 | 广西电网有限责任公司电力科学研究院 | Device and method for detecting three-phase closing synchronization and contact bounce of circuit breaker |
| CN113267722A (en) * | 2021-05-20 | 2021-08-17 | 国网安徽省电力有限公司检修分公司 | Method and system for testing double-end grounding opening and closing time of high-voltage circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121112 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121112 Address after: 048000 Shanxi province Jincheng City Xinshi Street No. 1 Patentee after: Shanxi Jincheng Electric Power Supply Company Patentee after: State Grid Corporation of China Address before: 048000 Shanxi province Jincheng City Xinshi Street No. 1 Patentee before: Shanxi Jincheng Electric Power Supply Company |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121128 Effective date of abandoning: 20140416 |
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| RGAV | Abandon patent right to avoid regrant |