CN101464495A - On-line monitoring method for mechanical characteristics of whole set switch apparatus - Google Patents
On-line monitoring method for mechanical characteristics of whole set switch apparatus Download PDFInfo
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- CN101464495A CN101464495A CNA2008101897841A CN200810189784A CN101464495A CN 101464495 A CN101464495 A CN 101464495A CN A2008101897841 A CNA2008101897841 A CN A2008101897841A CN 200810189784 A CN200810189784 A CN 200810189784A CN 101464495 A CN101464495 A CN 101464495A
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Abstract
The invention relates to an on-line monitoring method of mechanical characteristics of a complete switch device. The on-line monitoring method comprises the following steps: an angular displacement sensor for detecting the rotating angle of a main shaft is arranged on the main shaft for controlling the opening and the closing of a high-voltage circuit breaker; a Hall current sensor is arranged on the opening and the closing control coils of the high-voltage circuit breaker; the angular displacement sensor and the Hall current sensor are connected with a central control unit; when the opening operation or the closing operation of the high-voltage circuit breaker is conducted, the central control unit is used for acquiring the output voltage of the angular displacement sensor and the output current of the opening and the closing coils, then calculating the average closing speed, the average opening speed, the closing time, the opening time, the effective current value of the closing coil and the effective current value of the opening coil, and finally comparing and judging by using the central control unit; and when one of the average closing speed, the average opening speed, the closing time, the opening time, the effective current value of the closing coil and the effective current value of the opening coil is beyond the prearranged scope, an alarm is given.
Description
Technical field
The present invention relates to a kind of on-line monitoring method for mechanical characteristics of whole set switch apparatus.
Background technology
The root statistics, the most serious mechanical fault of isolating switch is tripping and malfunction.And cause that this type of cause faults has two aspects, and the one, the mechanical failure of operating mechanism and kinematic train is embodied in mechanism's jam, part distortion, displacement and damage, the divide-shut brake iron core looseness, the pivot pin fracture, it is malfunctioning to thread off etc.; Another reason is that the fault of electrical control and subsidiary loop causes, show as secondary connection loose contact, wiring error, divide-shut brake coil because of mechanism's jam or the bad scaling loss of switch, and fault such as operating power, closing contactor, microswitch be malfunctioning.
Thus, primary cut-out overwhelming majority accident comes from the reason of mechanical aspects, and is therefore more and more important to mechanism's status detection of isolating switch.Domestic in the past all adopt the off-line routine test with the operation primary cut-out is carried out prophylactic repair.This planned preventive reqair blindness is big, the expense height.Frequent operation and excessive field-strip can reduce the reliability of isolating switch action.Along with the electric pressure of electric system and improving constantly of net capacity, need in time to understand the operation conditions of isolating switch, grasp the variation and the trend of its running status.
Summary of the invention
Technical matters to be solved by this invention provides a kind of on-line monitoring method for mechanical characteristics of whole set switch apparatus that can make monitoring to the running status of breaker operation mechanism.
For solving the problems of the technologies described above, the invention provides a kind of on-line monitoring method for mechanical characteristics of whole set switch apparatus, comprise: being used to control on the main shaft of separating brake and combined floodgate and being provided with the angular displacement sensor that is used to detect this main shaft rotational angle at primary cut-out, be provided with Hall current sensor on the divide-shut brake control coil of primary cut-out, angular displacement sensor links to each other with central control unit with Hall current sensor; The alarm signal output ends of central control unit is provided with remote communication interface;
When primary cut-out separating brake or closing operation, central control unit is gathered from the output voltage of angular displacement sensor and the output current of divide-shut brake coil, calculates average opening velocity, average closing speed, opening time, closing time, the effective value of switching winding electric current and the effective value of closing coil electric current then; Compare judgement by central control unit at last, when one of described average opening velocity, average closing speed, opening time, closing time, the effective value of switching winding electric current and effective value of closing coil electric current exceed preset range, send alerting signal by remote communication interface.
If the ascending variation of output voltage that central control unit records angular displacement sensor judges that then described primary cut-out carries out closing operation; Otherwise, if the descending variation of output voltage that records angular displacement sensor then is judged as sub-switching operation.
The calculating of described opening time and closing time: by separating brake initial point that calculates and combined floodgate end point, the mistiming between the electric current energising constantly of the described divide-shut brake control coil of distance is opening time and closing time.
According to described opening time and closing time, the displacement variable between initial point and the end point draws average opening velocity and closing speed.
To carrying out low-pass digital filter: Y by following formula from the output voltage of angular displacement sensor and the output current of divide-shut brake coil
n=α X
n+ (1-α) Y
N-1
In the formula: Xn is this sampled value, and Yn-1 is last filtering output value, and α is a filter factor, and it is worth less than 1; Yn is the output valve of this filtering.
The present invention has positive effect: (1) on-line monitoring method for mechanical characteristics of whole set switch apparatus of the present invention, adopt a kind of online detection scheme of mechanical property at the 12kV vacuum circuit breaker, by being installed in angular displacement sensor and the Hall current sensor on the isolating switch, be in operation and detect its mechanical movement characteristic, according to the mechanical property parameter that records the running status of breaker operation mechanism is made a prediction, time saving and energy saving, improved efficient.
Description of drawings
Fig. 1 is the structural representation of the control circuit that on-line monitoring method for mechanical characteristics of whole set switch apparatus of the present invention adopted.
Embodiment
(embodiment 1)
See Fig. 1, the on-line monitoring method for mechanical characteristics of whole set switch apparatus of present embodiment comprises: being used to control on the main shaft of separating brake and combined floodgate and being provided with the angular displacement sensor 1 that is used to detect this main shaft rotational angle at primary cut-out, be provided with Hall current sensor 2 on the divide-shut brake control coil of primary cut-out, angular displacement sensor 1 links to each other with central control unit 3 with Hall current sensor 2; The alarm signal output ends of central control unit 3 is provided with remote communication interface 4.
When primary cut-out separating brake or closing operation, central control unit 3 is gathered from the output voltage of angular displacement sensor 1 and the output current of divide-shut brake coil 2, calculates average opening velocity, average closing speed, opening time, closing time, the effective value of switching winding electric current and the effective value of closing coil electric current then; Compare judgement by central control unit 3 at last, when one of described average opening velocity, average closing speed, opening time, closing time, the effective value of switching winding electric current and effective value of closing coil electric current exceed preset range, send alerting signal by remote communication interface 4, receive this signal by remote monitoring center, and in time safeguard processing.
If the ascending variation of output voltage that central control unit 3 records angular displacement sensor 1 judges that then described primary cut-out carries out closing operation; Otherwise, if the descending variation of output voltage that records angular displacement sensor 1 then is judged as sub-switching operation.
The calculating of described opening time and closing time: by separating brake initial point that calculates and combined floodgate end point, the mistiming between the electric current energising constantly of the described divide-shut brake control coil of distance is opening time and closing time.
According to described opening time and closing time, the displacement variable between initial point and the end point draws average opening velocity and closing speed.
To carrying out low-pass digital filter: Y by following formula from the output voltage of angular displacement sensor 1 and the output current of divide-shut brake coil 2
n=α X
n+ (1-α) Y
N-1
In the formula: Xn is this sampled value, and Yn-1 is last filtering output value, and α is a filter factor, and it is worth less than 1; Yn is the output valve of this filtering.
The angle (magnitude of voltage) that the measured main shaft of angular displacement sensor rotates is linear with moving contact straight-line displacement (voltage).Make the form of main shaft rotational angle (16 system magnitude of voltage) and moving contact displacement (mm) through linear operation.Just can obtain the moving contact straight-line displacement amount according to the magnitude of voltage of angular displacement sensor output through the method for the interpolation of tabling look-up like this.Be stored in the program with the form of empirical data (constant factor) then and use for the calculating machine characterisitic parameter.
The key of calculating average velocity is to find initial point and end point.For sub-switching operation: initial point is the moment and the position that main contacts separates; End point is just to have divided back 6mm.For closing operation: 6mm or 11mm before initial point is selected to close a floodgate according to measurement requirement; End point the moment and position that to be moving contact begin to contact with static contact.
The calculating of separating brake initial point: constant MAC_OPEN_A_FACTOR (separating brake angle factor) is the empirical data that obtains of test, the voltage variety (δ U) of the angle correspondence that expression is rotated from the closure state of contact to dynamic/static contact separated position main shaft.Like this, begin to search backward (corresponding voltage value is made as Ui) from first data, if MAC_OPEN_A_FACTOR-Ui 〉=δ U, then i point is exactly initial point.
The calculating of closing operation end point: constant MAC_CLOSE_A_FACTOR (combined floodgate angle factor) is the empirical data that test obtains, be illustrated in the making process, begin to touch the voltage variety (δ U) of the angle correspondence that moving contact stop motion main shaft rotated from dynamic/static contact.Like this, begin to search forward (corresponding voltage value is made as Ui), if MAC_CLOSE_A_FACTOR-Ui from last data 〉=δ U (n is last point), then i point is exactly end point.
The calculating of sub-switching operation end point and closing operation initial point: by adopting two constants to judge that these two point: MAC_OPEN_U_FACTOR (separating brake offset factor) and MAC_CLOSE_U_FACTOR (combined floodgate offset factor) are the empirical datas that test obtains in the program, interpolation obtains by tabling look-up.(Uo) searches (corresponding voltage value is made as Ui) backward from the sub-switching operation starting point, if Ui-Uo〉MAC_OPEN_U_FACTOR, then i point is exactly the end point of sub-switching operation.(Uc) searches (corresponding voltage value is made as Ui) forward from the closing operation end point, if Ui-Uc〉MAC_CLOSE_U_FACTOR, then i point is exactly the initial point of closing operation.
The calculating of average mark closing speed: according to initial point that calculates and end point, can obtain the sampling number between initial point and the end point, because the sampling interval time between per two sampled points is certain, so also can obtain the time (being made as δ t) between initial point and the end point, then the average mark closing speed is Vave=δ L/ δ t (δ L is the displacement variable between initial point and the end point).
The calculating of branch wire time:,, be branch wire time apart from the mistiming between first point (the coil current energising constantly) of mechanical property sampling by separating brake initial point that calculates and combined floodgate end point according to the definition of branch wire time
Because what system power supply was used is the modular switch power supply, its noise and ripple are all at about 5% of output voltage, though the power supply to input has carried out Filtering Processing on mechanical property sqignal conditioning plate, and the voltage signal that collects has also been carried out preposition active second-order filter to be handled, but the still filtering fully of interference that seals in via power ground, these noises and ripple disturb totally unfavorable for asking for of each mechanical parameter, and especially the computational accuracy influence for average opening velocity is very big.For this reason, in software for calculation at first to gathered various data carry out low-pass digital filter.
Claims (5)
1, a kind of on-line monitoring method for mechanical characteristics of whole set switch apparatus, it is characterized in that: being used to control on the main shaft of separating brake and combined floodgate and being provided with the angular displacement sensor (1) that is used to detect this main shaft rotational angle at primary cut-out, be provided with Hall current sensor (2) on the divide-shut brake control coil of primary cut-out, angular displacement sensor (1) links to each other with central control unit (3) with Hall current sensor (2); The alarm signal output ends of central control unit (3) is provided with remote communication interface (4);
When primary cut-out separating brake or closing operation, central control unit (3) is gathered from the output voltage of angular displacement sensor (1) and the output current of divide-shut brake coil (2), calculates average opening velocity, average closing speed, opening time, closing time, the effective value of switching winding electric current and the effective value of closing coil electric current then; Compare judgement by central control unit (3) at last, when one of described average opening velocity, average closing speed, opening time, closing time, the effective value of switching winding electric current and effective value of closing coil electric current exceed preset range, send alerting signal by remote communication interface (4).
2, on-line monitoring method for mechanical characteristics of whole set switch apparatus according to claim 1, it is characterized in that: if the ascending variation of output voltage that central control unit (3) records angular displacement sensor (1) judges that then described primary cut-out carries out closing operation; Otherwise, if the descending variation of output voltage that records angular displacement sensor (1) then is judged as sub-switching operation.
3, on-line monitoring method for mechanical characteristics of whole set switch apparatus according to claim 1 and 2, it is characterized in that: the calculating of described opening time and closing time: by separating brake initial point that calculates and combined floodgate end point, the mistiming between the electric current energising constantly of the described divide-shut brake control coil of distance is opening time and closing time.
4, the described on-line monitoring method for mechanical characteristics of whole set switch apparatus of claim 3 is characterized in that: according to described opening time and closing time, the displacement variable between initial point and the end point draws average opening velocity and closing speed.
5, the described on-line monitoring method for mechanical characteristics of whole set switch apparatus of claim 2 is characterized in that: to carrying out low-pass digital filter from the output voltage of angular displacement sensor (1) and the output current of divide-shut brake coil (2) by following formula:
Y
n＝α·X
n+(1-α)·Y
n-1
In the formula: Xn is this sampled value, and Yn-1 is last filtering output value, and α is a filter factor, and it is worth less than 1; Yn is the output valve of this filtering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101897841A CN101464495B (en) | 2008-12-31 | 2008-12-31 | On-line monitoring method for mechanical characteristics of whole set switch apparatus |
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| CN2008101897841A CN101464495B (en) | 2008-12-31 | 2008-12-31 | On-line monitoring method for mechanical characteristics of whole set switch apparatus |
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| CN101464495A true CN101464495A (en) | 2009-06-24 |
| CN101464495B CN101464495B (en) | 2012-04-25 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813752A (en) * | 2010-04-20 | 2010-08-25 | 武汉新电电气技术有限责任公司 | High voltage switch dynamic characteristics tester |
| CN102610427A (en) * | 2011-10-14 | 2012-07-25 | 常州市明及电气技术开发有限公司 | Intelligent switch-on-off speed monitoring device for vacuum circuit breaker |
| CN102981434A (en) * | 2012-11-27 | 2013-03-20 | 中国西电电气股份有限公司 | Analog loading device |
| CN103197235A (en) * | 2011-11-28 | 2013-07-10 | 施耐德电器工业公司 | A method for evaluating the mechanical performances of a switchgear apparatus and the switchgear apparatus |
| CN103869142A (en) * | 2012-12-18 | 2014-06-18 | 罗伯特·博世有限公司 | Method and Device for Monitoring Signal Levels |
| CN104656011A (en) * | 2013-11-19 | 2015-05-27 | 国家电网公司 | Circuit and system for monitoring |
| CN105372589A (en) * | 2015-12-18 | 2016-03-02 | 中国科学院合肥物质科学研究院 | Breaker power distribution state monitoring device |
| CN105759205A (en) * | 2016-05-18 | 2016-07-13 | 云南电网有限责任公司昆明供电局 | Online monitoring device for mechanical characteristics of circuit breaker and coil current of driving mechanism |
| CN105823983A (en) * | 2016-05-06 | 2016-08-03 | 国家电网公司 | Mechanical characteristic state on-line monitoring system for high voltage breaker |
| CN105891705A (en) * | 2016-03-15 | 2016-08-24 | 国家电网公司 | Detection system of a circuit breaker |
| CN107478985A (en) * | 2017-08-21 | 2017-12-15 | 河海大学常州校区 | On-load tap changers of transformers state on_line monitoring device and its monitoring method |
| CN108226770A (en) * | 2017-12-20 | 2018-06-29 | 中国南方电网有限责任公司超高压输电公司天生桥局 | A kind of circuit breaker failure diagnostic method |
| CN112285553A (en) * | 2020-12-25 | 2021-01-29 | 广东电网有限责任公司佛山供电局 | Non-contact type measuring device and method for average opening and closing speed of 10kV vacuum circuit breaker |
| CN116047285A (en) * | 2023-01-13 | 2023-05-02 | 北京华控智加科技有限公司 | Method and system for detecting opening and closing of outlet circuit breaker |
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2008
- 2008-12-31 CN CN2008101897841A patent/CN101464495B/en active Active
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813752A (en) * | 2010-04-20 | 2010-08-25 | 武汉新电电气技术有限责任公司 | High voltage switch dynamic characteristics tester |
| CN102610427A (en) * | 2011-10-14 | 2012-07-25 | 常州市明及电气技术开发有限公司 | Intelligent switch-on-off speed monitoring device for vacuum circuit breaker |
| CN103197235A (en) * | 2011-11-28 | 2013-07-10 | 施耐德电器工业公司 | A method for evaluating the mechanical performances of a switchgear apparatus and the switchgear apparatus |
| CN102981434A (en) * | 2012-11-27 | 2013-03-20 | 中国西电电气股份有限公司 | Analog loading device |
| CN102981434B (en) * | 2012-11-27 | 2014-10-01 | 中国西电电气股份有限公司 | Testing method of analog loading device to process analog loading to operating mechanism |
| CN103869142A (en) * | 2012-12-18 | 2014-06-18 | 罗伯特·博世有限公司 | Method and Device for Monitoring Signal Levels |
| CN104656011A (en) * | 2013-11-19 | 2015-05-27 | 国家电网公司 | Circuit and system for monitoring |
| CN105372589B (en) * | 2015-12-18 | 2018-09-25 | 中国科学院合肥物质科学研究院 | A kind of breaker power status monitoring device |
| CN105372589A (en) * | 2015-12-18 | 2016-03-02 | 中国科学院合肥物质科学研究院 | Breaker power distribution state monitoring device |
| CN105891705A (en) * | 2016-03-15 | 2016-08-24 | 国家电网公司 | Detection system of a circuit breaker |
| CN105823983A (en) * | 2016-05-06 | 2016-08-03 | 国家电网公司 | Mechanical characteristic state on-line monitoring system for high voltage breaker |
| CN105759205A (en) * | 2016-05-18 | 2016-07-13 | 云南电网有限责任公司昆明供电局 | Online monitoring device for mechanical characteristics of circuit breaker and coil current of driving mechanism |
| CN107478985A (en) * | 2017-08-21 | 2017-12-15 | 河海大学常州校区 | On-load tap changers of transformers state on_line monitoring device and its monitoring method |
| CN108226770A (en) * | 2017-12-20 | 2018-06-29 | 中国南方电网有限责任公司超高压输电公司天生桥局 | A kind of circuit breaker failure diagnostic method |
| CN112285553A (en) * | 2020-12-25 | 2021-01-29 | 广东电网有限责任公司佛山供电局 | Non-contact type measuring device and method for average opening and closing speed of 10kV vacuum circuit breaker |
| CN116047285A (en) * | 2023-01-13 | 2023-05-02 | 北京华控智加科技有限公司 | Method and system for detecting opening and closing of outlet circuit breaker |
| CN116047285B (en) * | 2023-01-13 | 2023-11-10 | 北京华控智加科技有限公司 | Method and system for detecting opening and closing of outlet circuit breaker |
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| CN101464495B (en) | 2012-04-25 |
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Application publication date: 20090624 Assignee: JIANGXI PEOPLE POWER TRANSMISSION AND TRANSFORMATION CO.,LTD. Assignor: People Electric Appliance Group Co.,Ltd. Contract record no.: 2015360000100 Denomination of invention: On-line monitoring method for mechanical characteristics of whole set switch apparatus Granted publication date: 20120425 License type: Exclusive License Record date: 20150624 |
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Effective date of registration: 20220707 Address after: 277000 Room 102, No. 555, Guoxing Road, Zhangfan street, high tech Zone, Zaozhuang City, Shandong Province Patentee after: People's Electric Appliance Group (Shandong) Zaokuang Intelligent Manufacturing Co.,Ltd. Address before: 325604 Liushi people's Industrial Park, Zhejiang, Yueqing Patentee before: People Electric Appliance Group Co.,Ltd. |
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Address after: 277000 Room 102, No. 555, Guoxing Road, Zhangfan street, high tech Zone, Zaozhuang City, Shandong Province Patentee after: People's Electrical Appliance Group Shandong Co.,Ltd. Address before: 277000 Room 102, No. 555, Guoxing Road, Zhangfan street, high tech Zone, Zaozhuang City, Shandong Province Patentee before: People's Electric Appliance Group (Shandong) Zaokuang Intelligent Manufacturing Co.,Ltd. |
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