CN103968987A - Contact finger pressure on-line detection device of high-voltage isolating switch - Google Patents
Contact finger pressure on-line detection device of high-voltage isolating switch Download PDFInfo
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Abstract
A contact finger pressure on-line detection device of a high-voltage isolating switch is characterized by comprising a metal vibration wire and a control circuit, wherein the control circuit comprises a master controller, an induction power supply module, a pressure detection module and an alarm module, wherein the induction power supply module supplies power to the master controller, the pressure detection module and the alarm module, the metal vibration wire is connected to a pressure detection circuit in series, the signal input end of the pressure detection circuit is connected with the trigger end of the master controller, the signal output end of the pressure detection circuit is connected with the feedback end of the master controller, and the alarm signal end of the master controller is connected with the input end of the alarm module. The contact finger pressure on-line detection device has the advantages that the vibration wire is adopted to measure pressure exerted on the position between contact fingers on two sides by a movable contact, the structure is simple, installation is convenient, simpliness, rapidness, accuracy and economy are achieved, higher practicality is achieved, the contact finger pressure on-line detection device can be widely applied to contact finger pressure detection of isolating switches with various voltage levels, and operation reliability of a power grid is enhanced.
Description
Technical field
The present invention relates to the on-line measuring device of a kind of online measuring technique of power equipment, particularly a kind of high-voltage isolating switch sensing finger pressure.
Background technology
High voltage isolator is important device for switching in generating plant and transformer station's electrical system, need support the use with primary cut-out, and its major function is to ensure High-Voltage Electrical Appliances and the safety of device in the time of service work, plays isolation voltage.Fingertip is the critical component of high voltage isolator, and the separating brake of high voltage isolator is to rely on fingertip and contacts mates to realize with closing a floodgate; Wherein, the contact resistance value size of size meeting influencing contactor of sensing finger pressure and the temperature height of contact, contact temperature meeting and then have influence on the spring performance that pressure is provided for fingertip, and the quality of spring performance is not only to contacting directly the serviceable life of high voltage isolator, also can have influence on the security of operation of high voltage power transmission and transforming net.Therefore it is very necessary, sensing finger pressure being detected.
Conventional sensing finger pressure detection method has spring balance pulling method and simulation disconnector moving contact method.Wherein, spring balance is the sensing finger pressure survey instrument of all kinds of maintenance procedures and standard recommendation; Simulation disconnector moving contact method is arranged on sensing element on the isolation switch contact of simulation, in cold situation, will simulate moving contact and insert the actual closing position of the dynamic and static contact of disconnector, realize sensing finger pressure and measure, isolation switch contact intelligent detecting instrument is in the market based on simulation disconnector moving contact ratio juris mostly.But above-mentioned two kinds of measuring methods all cannot realize the on-line measurement of sensing finger pressure, safety that cannot guarantee for implement operation of power networks.
In prior art, the Granted publication that as the patent No. is is number for the Chinese invention patent " high-voltage isolating switch sensing finger pressure proving installation " of ZL201110180345.6 discloses a kind of high-voltage isolating switch sensing finger pressure proving installation, and it comprises tong-like test contact, hydraulic cylinder, tensimeter, micro hydraulic station, solenoid directional control valve and travel switch; The stiff end rear end of tong-like test contact is fixed on hydraulic cylinder body, movable end rear inside is fixed on the piston rod of hydraulic cylinder, when movable end opening angle is maximum, movable end contact end or outside, rear end withstand on travel switch, and two oil pockets of hydraulic cylinder are connected on micro hydraulic station by solenoid directional control valve by pressurization oil pipe and pressure release oil pipe respectively; On the pressurization oil pipe of hydraulic cylinder, tensimeter is installed.But, this patent is the test for high voltage isolator fingertip grip force, to solve in advance hold with a firm grip the generation of hypodynamic phenomenon of high voltage isolator fingertip, ensure the quality of dispatching from the factory of high voltage isolator, cannot realize equally the online detection of the sensing finger pressure to high voltage isolator.
Summary of the invention
Technical matters to be solved by this invention is the contact finger pressure testing device that a kind of simple in structure and high voltage isolator that can on-line measurement sensing finger pressure is provided for above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of sensing finger pressure on-line measuring device of high voltage isolator, it is characterized in that: this pick-up unit includes the metal vibratory string between two fingertips that are arranged at high voltage isolator and realizes the control circuit that sensing finger pressure detects, wherein, described control circuit includes primary controller, induction power supply module, pressure detection module and alarm module, described primary controller, pressure detection module and alarm module are respectively by described induction power supply module for power supply, described primary controller has trigger end, feedback end and alerting signal end, described pressure detection module includes signal input part and signal output part, described metal vibratory string is serially connected in described pressure detection circuit, the signal input part of described pressure detection circuit is connected with the trigger end of described primary controller, the signal output part of described pressure detection circuit is connected with the feedback end of described primary controller, the alerting signal end of described primary controller and the input end of described alarm module are connected.
As preferably, described pressure detection module includes excitation chain and pick-up circuit, the trigger end of described primary controller is connected with the input end of described excitation chain, the output terminal of described excitation chain is connected with the input end of described pick-up circuit after described metal vibratory string, and the output terminal of described pick-up circuit is connected with the feedback end of described primary controller.
In order to improve accuracy of detection and accuracy, ensure the reliability detecting, as further preferred, described pick-up circuit can include the first comparer that model is TLC2272, model is the second comparer of TLC2272 and the 3rd comparer that model is LM393D, wherein, positive source connection+5V the direct current of described the first comparer, the power cathode one tunnel connection-5V direct current of this first comparer, another road first capacity earth, the electrode input end of described the first comparer is through the second resistance eutral grounding, negative input one tunnel of this first comparer is connected as the input end of described pick-up circuit and the output terminal of described excitation chain after the first resistance, another Lu Jing tri-resistance connect the output terminal of described the first comparer, the two ends of described the 3rd resistance are parallel with the second electric capacity, described metal vibratory string is serially connected between the input end and described earth terminal of described pick-up circuit, the output terminal of described the first comparer is connected with the negative input of described the second comparer after the 4th resistance through the 3rd electric capacity successively, the negative input of this second comparer connects the output terminal of this second comparer through the 6th resistance, the two ends of described the 6th resistance are parallel with the 4th electric capacity, and the electrode input end of described the second comparer is ground connection after the 5th resistance, the output terminal of described the second comparer is leaded up to the 7th resistance eutral grounding after the 5th electric capacity, the 8th resistance of separately leading up to connects the electrode input end of described the 3rd comparer, electrode input end one tunnel the tenth resistance of described the 3rd comparer connects the output terminal of the 3rd comparer, another Lu Jing six capacity earths, the negative input of described the 3rd comparer is through the 9th resistance eutral grounding, positive source connection+5V the direct current of the 3rd comparer, power cathode connection-5V the direct current of the 3rd comparer, output terminal one tunnel the 11 resistance connection+5V direct current of described the 3rd comparer, another road is connected as the output terminal of described pick-up circuit and the feedback end of described primary controller.
As preferably, described primary controller can be the microcontroller of STM32 for model.
As preferably, described induction power supply module includes induction power taking unit, energy storage control module and voltage transformation module, wherein, the input of described induction power taking unit is from the magnetic field of high voltage supply circuit, the output terminal of this induction power taking unit is connected with the input end of described energy storage control module, the output terminal of described energy storage control module is connected with described voltage transformation module, and the output terminal of this voltage transformation module is given respectively described primary controller, pressure detection module and alarm module power supply as the output of described induction power supply module.
For convenient, testing result is transferred to remote terminal, as preferably, described control circuit also includes wireless communication module, described primary controller also has wireless signal output terminal, the wireless signal output terminal of described primary controller and the input end of described wireless communication module are connected, and described wireless communication module is by described induction power supply module for power supply.
Described metal vibratory string can adopt all kinds of vibrating wire sensor of the prior art, install for convenient, reduce and disturb, as preferably, described metal vibratory string includes insulating sleeve, magnet steel and vibratory string, described vibratory string is located in described insulating sleeve, and described magnet steel is arranged in described insulating sleeve, and two fingertips of the two ends of described insulating sleeve and described high voltage isolator are fixedly connected with respectively.
Compared with prior art, the invention has the advantages that: adopt the vibratory string being fixed between fingertip to measure moving contact and be applied to the pressure between the fingertip of both sides, simple in structure, easy for installation, operate and easily realize, solved the problem of the online detection difficult of current sensing finger pressure; Vibratory string is measured sensing finger pressure and is possessed simple and direct, accurate and economic advantage, possesses stronger practicality, can be widely used in, in the isolating switch sensing finger pressure detection of various electric pressures, improving the reliability of operation of power networks; Can ensure the accuracy and the degree of accuracy that detect for simple, the multiple comparer setting of pick-up circuit structure of vibratory string pressure detection and conversion, improve detecting reliability.
Brief description of the drawings
Fig. 1 is the structural representation of the high voltage isolator of the embodiment of the present invention.
Fig. 2 is the control circuit functional block diagram of the embodiment of the present invention.
Fig. 3 is the concrete circuit connection diagram of pick-up circuit of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in FIG. 1 to 3, the present embodiment discloses a kind of contact finger pressure testing device of high voltage isolator, this pick-up unit is the deficiency that overcomes existing detection method, a kind of real-time detection apparatus of sensing finger pressure is provided for being similar to the high voltage isolator of the type contacts such as GW4, GW5, GW8, GW13, realize the online Measurement accuracy to sensing finger pressure, improve serviceable life and the safe operation of electric network of disconnector.
The sensing finger pressure on-line measuring device of the present embodiment includes the metal vibratory string 9 between two fingertips that are arranged at high voltage isolator and realizes the control circuit that sensing finger pressure detects.
As shown in Figure 1, for the common structure of high voltage isolator, this high voltage isolator includes button contact base 1, bolt 2, spring washer 3, edge of a knife packing ring 4, pin 5, spring 6, fingertip 7, moving contact 8 and metal vibratory string 9, the metal vibratory string 9 that the present embodiment adopts is a kind of vibrating wire sensor, this metal vibratory string 9 specifically includes insulating sleeve, magnet steel and vibratory string, vibratory string is located in insulating sleeve, magnet steel is arranged in insulating sleeve, and two fingertips 7 of the two ends of insulating sleeve and high voltage isolator are fixedly connected with respectively.
Control circuit includes primary controller 10, induction power supply module 20, pressure detection module 30, wireless communication module 40 and alarm module 50, primary controller 10, pressure detection module 30, wireless communication module 40 and alarm module 50 are powered by induction power supply module 20 respectively, wherein, it is the microcontroller of STM32 that primary controller 10 adopts model, and this primary controller 10 has trigger end, feedback end, wireless signal output terminal and alerting signal end;
Pressure detection module 30 includes excitation chain 301 and pick-up circuit 302, metal vibratory string 9 is serially connected in pressure detection circuit, the trigger end of primary controller 10 is connected with the input end of excitation chain 301, the output terminal of excitation chain 301 is connected with the input end of pick-up circuit 302 after the metal vibratory string 9 of serial connection, and the output terminal of pick-up circuit 302 is connected with the feedback end of primary controller 10;
The alerting signal end of primary controller 10 is connected with the input end of alarm module 50; The wireless signal output terminal of primary controller 10 is connected with the input end of wireless communication module 40;
Induction power supply module 20 includes induction power taking unit 201, energy storage control module 202 and voltage transformation module 203, wherein, the input of induction power taking unit 201 is from the magnetic field of high voltage supply circuit, the output terminal of this induction power taking unit 201 is connected with the input end of energy storage control module 202, the output terminal of energy storage control module 202 is connected with voltage transformation module 203, and the output terminal of this voltage transformation module 203 powers to respectively primary controller 10, pressure detection module 30, wireless signal output terminal and alarm module 50 as the output terminal of induction power supply module 20.
Induction power supply module 20, wireless communication module 40, alarm module 50 and the excitation chain 301 of the present embodiment can adopt respectively various custom circuit structure of the prior art to realize, particularly, the pick-up circuit 302 of the present embodiment can be realized by following circuit structure:
It is the 3rd comparer U3 that the first comparer U1, the model of the TLC2272 second comparer U2 that is TLC2272 and model are LM393D that this pick-up circuit 302 includes model, the first comparer U1 and the second comparer U2 are mainly signal amplifying function, the trigger pip of excitation chain output is carried out to power amplification, the 3rd comparer U3 is comparing function, for detection of the comparison between force value and setting threshold, with output feedback signal to primary controller, wherein, positive source connection+5V the direct current of the first comparer U1, the power cathode one tunnel connection-5V direct current of this first comparer U1, another road first capacitor C 1 ground connection, the electrode input end of the first comparer U1 is through the second resistance R 2 ground connection, negative input one tunnel of this first comparer U1 input end A as pick-up circuit 302 after the first resistance R 1 is connected with the output terminal of excitation chain 301, another Lu Jing tri-resistance R 3 connect the output terminal of the first comparer U1, the two ends of the 3rd resistance R 3 are parallel with the second capacitor C 2, metal vibratory string 9 is serially connected between the input end and earth terminal of pick-up circuit 302,
The output terminal of the first comparer U1 is connected with the negative input of the second comparer U2 after the 4th resistance R 4 through the 3rd capacitor C 3 successively, the negative input of this second comparer U2 connects the output terminal of this second comparer U2 through the 6th resistance R 6, the two ends of the 6th resistance R 6 are parallel with electrode input end ground connection after the 5th resistance R 5 of the 4th capacitor C 4, the second comparer U2;
The output terminal of the second comparer U2 is leaded up to the 7th resistance R 7 ground connection after the 5th capacitor C 5, the 8th resistance R 8 of separately leading up to connects the electrode input end of the 3rd comparer U3, electrode input end one tunnel the tenth resistance R 10 of the 3rd comparer U3 connects the output terminal of the 3rd comparer U3, another Lu Jing six capacitor C 6 ground connection, the negative input of the 3rd comparer U3 is through the 9th resistance R 9 ground connection, positive source connection+5V the direct current of the 3rd comparer U3, power cathode connection-5V the direct current of the 3rd comparer U3, output terminal one tunnel the 11 connect+5V of resistance R 11 direct current of the 3rd comparer U3, another road is connected with the feedback end of primary controller 10 as the output terminal B of pick-up circuit 302.
The principle of work of the sensing finger pressure on-line measuring device of the present embodiment is: metal vibratory string 9 is fixed and is connected with the fingertip of high voltage isolator by insulating sleeve, metal vibratory string 9 tension is installed between two fingertips, utilizes this metal vibratory string 9 to measure it and be subject to the extruding force size of moving contact as sensitive element; In the situation that vibratory string length is definite, the variable quantity of vibratory string natural vibration frequency can characterize the size of the suffered pulling force of vibratory string, i.e. the sensing finger pressure size of high voltage isolator.
When gaging pressure, primary controller 10 sends trigger pip to excitation chain 301, apply an exciting voltage to vibratory string by excitation chain 301, make vibratory string in vibrational state, meanwhile, vibratory string is subject to the effect of sensing finger pressure, vibratory string has resonance frequency and changes, this resonance frequency is fixed on one and is on the numerical value of proportionate relationship with sensing finger pressure size, the resonance frequency of vibratory string can be sent into primary controller 10 and carry out frequency measurement, thereby inverse goes out the size of sensing finger pressure value by pick-up circuit 302; Induction power supply module 20 is by electrical network power taking, for whole pick-up unit provides power supply; Alarm module 50 can carry out insufficient pressure warning to the comparative result of pressure measuring value and the safe threshold values of preset pressure according to primary controller 10, to remind operational management personnel to safeguard or to change high voltage isolator; Wireless communication module 40 is for the remote transmission of pressure measurements, as sends host computer or reading terminal to, is convenient to build grid automation operation management system.
Claims (7)
1. the sensing finger pressure on-line measuring device of a high voltage isolator, it is characterized in that: this pick-up unit includes the metal vibratory string between two fingertips that are arranged at high voltage isolator and realizes the control circuit that sensing finger pressure detects, wherein, described control circuit includes primary controller, induction power supply module, pressure detection module and alarm module, described primary controller, pressure detection module and alarm module are respectively by described induction power supply module for power supply, described primary controller has trigger end, feedback end and alerting signal end, described pressure detection module includes signal input part and signal output part, described metal vibratory string is serially connected in described pressure detection circuit, the signal input part of described pressure detection circuit is connected with the trigger end of described primary controller, the signal output part of described pressure detection circuit is connected with the feedback end of described primary controller, the alerting signal end of described primary controller and the input end of described alarm module are connected.
2. the sensing finger pressure on-line measuring device of high voltage isolator according to claim 1, it is characterized in that: described pressure detection module includes excitation chain and pick-up circuit, the trigger end of described primary controller is connected with the input end of described excitation chain, the output terminal of described excitation chain is connected with the input end of described pick-up circuit after described metal vibratory string, and the output terminal of described pick-up circuit is connected with the feedback end of described primary controller.
3. the sensing finger pressure on-line measuring device of high voltage isolator according to claim 2, it is characterized in that: described pick-up circuit includes the first comparer that model is TLC2272, model is the second comparer of TLC2272 and the 3rd comparer that model is LM393D, wherein, positive source connection+5V the direct current of described the first comparer, the power cathode one tunnel connection-5V direct current of this first comparer, another road first capacity earth, the electrode input end of described the first comparer is through the second resistance eutral grounding, negative input one tunnel of this first comparer is connected as the input end of described pick-up circuit and the output terminal of described excitation chain after the first resistance, another Lu Jing tri-resistance connect the output terminal of described the first comparer, the two ends of described the 3rd resistance are parallel with the second electric capacity, described metal vibratory string is serially connected between the input end and described earth terminal of described pick-up circuit, the output terminal of described the first comparer is connected with the negative input of described the second comparer after the 4th resistance through the 3rd electric capacity successively, the negative input of this second comparer connects the output terminal of this second comparer through the 6th resistance, the two ends of described the 6th resistance are parallel with the 4th electric capacity, and the electrode input end of described the second comparer is ground connection after the 5th resistance, the output terminal of described the second comparer is leaded up to the 7th resistance eutral grounding after the 5th electric capacity, the 8th resistance of separately leading up to connects the electrode input end of described the 3rd comparer, electrode input end one tunnel the tenth resistance of described the 3rd comparer connects the output terminal of the 3rd comparer, another Lu Jing six capacity earths, the negative input of described the 3rd comparer is through the 9th resistance eutral grounding, positive source connection+5V the direct current of the 3rd comparer, power cathode connection-5V the direct current of the 3rd comparer, output terminal one tunnel the 11 resistance connection+5V direct current of described the 3rd comparer, another road is connected as the output terminal of described pick-up circuit and the feedback end of described primary controller.
4. the sensing finger pressure on-line measuring device of high voltage isolator according to claim 1, is characterized in that: described primary controller is that model is the microcontroller of STM32.
5. the sensing finger pressure on-line measuring device of high voltage isolator according to claim 1, it is characterized in that: described induction power supply module includes induction power taking unit, energy storage control module and voltage transformation module, wherein, the input of described induction power taking unit is from the magnetic field of high voltage supply circuit, the output terminal of this induction power taking unit is connected with the input end of described energy storage control module, the output terminal of described energy storage control module is connected with described voltage transformation module, the output terminal of this voltage transformation module is given respectively described primary controller as the output of described induction power supply module, pressure detection module and alarm module power supply.
6. the sensing finger pressure on-line measuring device of high voltage isolator according to claim 1, it is characterized in that: described control circuit also includes wireless communication module, described primary controller also has wireless signal output terminal, the wireless signal output terminal of described primary controller and the input end of described wireless communication module are connected, and described wireless communication module is by described induction power supply module for power supply.
7. according to the sensing finger pressure on-line measuring device of the high voltage isolator described in arbitrary claim in claim 1～6, it is characterized in that: described metal vibratory string includes insulating sleeve, magnet steel and vibratory string, described vibratory string is located in described insulating sleeve, described magnet steel is arranged in described insulating sleeve, and two fingertips of the two ends of described insulating sleeve and described high voltage isolator are fixedly connected with respectively.
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| CN201410162938.3A CN103968987B (en) | 2014-04-22 | 2014-04-22 | A kind of sensing finger pressure on-line measuring device of high voltage isolator |
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| CN105222935A (en) * | 2015-09-25 | 2016-01-06 | 国家电网公司 | High-voltage isolating switch sensing finger pressure wireless detection device |
| CN106017761A (en) * | 2016-05-16 | 2016-10-12 | 西安工程大学 | Isolating switch on-line monitoring system based on pressure sensor |
| CN106154033A (en) * | 2016-07-08 | 2016-11-23 | 西北农林科技大学 | Eliminate vibrating wire sensor frequency detecting device and the detection method of loop accumulation electric energy |
| CN107830962A (en) * | 2017-12-13 | 2018-03-23 | 湖南长高高压开关有限公司 | A kind of multi-functional disconnecting switch temperature clamping force monitoring device of general-purpose type and method |
| CN110530566A (en) * | 2019-10-10 | 2019-12-03 | 国网河南省电力公司电力科学研究院 | A kind of breaker switching on and off spring pressure monitoring system and detection method |
| CN110749388A (en) * | 2019-10-31 | 2020-02-04 | 国网河北省电力有限公司电力科学研究院 | High tension switchgear plum blossom contact pressure on-line monitoring device |
| CN113985264A (en) * | 2021-09-30 | 2022-01-28 | 国网江苏省电力有限公司电力科学研究院 | Isolator action state monitoring devices based on location |
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| CN106017761A (en) * | 2016-05-16 | 2016-10-12 | 西安工程大学 | Isolating switch on-line monitoring system based on pressure sensor |
| CN106154033A (en) * | 2016-07-08 | 2016-11-23 | 西北农林科技大学 | Eliminate vibrating wire sensor frequency detecting device and the detection method of loop accumulation electric energy |
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| CN110530566A (en) * | 2019-10-10 | 2019-12-03 | 国网河南省电力公司电力科学研究院 | A kind of breaker switching on and off spring pressure monitoring system and detection method |
| CN110749388A (en) * | 2019-10-31 | 2020-02-04 | 国网河北省电力有限公司电力科学研究院 | High tension switchgear plum blossom contact pressure on-line monitoring device |
| CN110749388B (en) * | 2019-10-31 | 2021-09-28 | 国网河北省电力有限公司电力科学研究院 | High tension switchgear plum blossom contact pressure on-line monitoring device |
| CN113985264A (en) * | 2021-09-30 | 2022-01-28 | 国网江苏省电力有限公司电力科学研究院 | Isolator action state monitoring devices based on location |
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