CN1673767A - Vacuum circuit breaker electrical endurance monitoring apparatus - Google Patents
Vacuum circuit breaker electrical endurance monitoring apparatus Download PDFInfo
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- CN1673767A CN1673767A CN 200510066027 CN200510066027A CN1673767A CN 1673767 A CN1673767 A CN 1673767A CN 200510066027 CN200510066027 CN 200510066027 CN 200510066027 A CN200510066027 A CN 200510066027A CN 1673767 A CN1673767 A CN 1673767A
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- circuit breaker
- vacuum circuit
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Abstract
The present invention relates to electric life monitor for vacuum circuit breaker and belongs to the field of current measuring technology. The electric life monitor for vacuum circuit breaker includes current sensor set beside the bus serially connected to the vacuum circuit breaker or beside its secondary current loop and A/D converter and data processor, which constitute in-site single channel or multiple channel control unit connected via transmission cable to industrial control computer. The present invention may be used in real-time on-line monitoring of vacuum circuit breaker, and the residual life may be obtained via monitoring and some warning signal may be sent out for timely processing.
Description
Technical field
The invention belongs to the current measurement techniques field, particularly the vacuum circuit breaker electrical endurance monitoring apparatus structural design.
Background technology
Vacuum circuit breaker is a kind of novel electric equipment that fast development is in recent ten years got up.Compare with traditional oil-break, have many advantages, but as do not fire, do not pollute, long frequent operation of inspection-free phase, series of advantages such as less contact gap, volume is little, in light weight, electric arc does not expose, the life-span is long, it progressively becomes the main switchgear in the intermediate distribution system.
Life-span length is the distinguishing feature of vacuum circuit breaker.Be the comprehensive of mechanical life and electric life its serviceable life.Be meant deciliter cycling number of times of isolating switch under unloaded or specified long-term load underloading its mechanical life, be conceived to the ability of mechanical action aspect.Vacuum circuit breaker is long mechanical life, can reach more than 10,000 times.Electric life is the electric connecting-disconnecting function of vacuum circuit breaker, represents with the open and close times of rated short circuit drop-out current usually.Because powerful electric arc is to the ablation of contact, the electric life number of times of vacuum circuit breaker is only tens of inferior.In general, the electric life of vacuum circuit breaker determines its true term of life.If electric life surpasses, electrically contact and can worsen, vacuum interrupter can lose efficacy, and electric arc can not disconnect, and arc-chutes may explode, and cause a serious accident.Because vacuum circuit breaker increasingly extensive employing in system, so, the monitoring and the assessment of its electric life is very important.
The against vacuum isolating switch, the electrical wear that produces owing to arcing when the principal element that influences electric life is the isolating switch dropout current causes the loss of destruction, metal material of electrical contact surface and distortion etc.The electrical wear meeting influences the performance of arc-chutes arc extinguishing.Because the size of the scaling loss of contact and electric current is not the simple proportional relation under the different electric currents, therefore, for the monitoring of electric life, the method error that simply adds up dropout current is very big.
A kind of method of the calculating vacuum circuit breaker electrical endurance that generally adopts be so-called " dropout current weighted cumulative method ", dropout current weighted cumulative method adopts following formula to calculate the tired Q of dropout current weighting, is totally electrical wear value:
I in the formula
iThe current value, the α that are the i time disconnection are weighting coefficients.α is generally between 1.5 to 2, and the electric life curve of the vacuum circuit breaker that can be provided by manufacturing firm obtains.Q
0Be the expection electric life value of this vacuum circuit breaker, also can from the data that manufacturing firm provides, obtain.With Q and expection electric life value Q
0Compare, can draw residual electricity life-span Δ Q:
ΔQ＝Q
0-Q (2)
This method only need be known the size of each dropout current, fairly simple practicality.
At present, because difficulty aspect the big electric current is cut-off in test under the strong electromagnetic condition, only there is a few unit to make some demonstrations in theory at present, but also do not develop specialized device at the vacuum circuit breaker electrical endurance monitoring.
Summary of the invention
The objective of the invention is to propose a kind of vacuum circuit breaker electrical endurance monitoring apparatus, can be used for the real time on-line monitoring of the electric life of vacuum circuit breaker for overcoming the weak point of prior art.By monitoring, draw its residual electricity life-span, and provide certain alerting signal, the maintainer can handle timely, thereby can avoid the generation of major accident.
The present invention proposes a kind of vacuum circuit breaker electrical endurance monitoring apparatus, it is characterized in that, this device comprises by the bus that is arranged on the vacuum circuit breaker series connection or the current sensor of secondary current loop one side, one or more control module on the spot that the analog to digital conversion that links to each other with this current sensor and data processor are formed, described each on the spot control module link to each other with industrial computer by signal-transmitting cable.
The present invention proposes another kind of vacuum circuit breaker electrical endurance monitoring apparatus, it is characterized in that, this device comprises the current sensor at master switch place of the bus that is arranged on vacuum circuit breaker series connection and the control module of being made up of analog to digital conversion and data processor on the spot that links to each other with this current sensor, the on off state testing circuit that links to each other with a plurality of load switches, by signal-transmitting cable respectively with this industrial computer of linking to each other of control module and on off state testing circuit on the spot.
Technical characterstic of the present invention and effect:
1. real time monitoring function: important parameters such as isolating switch residual life and dropout current number of times and current values are carried out long-continued real-time monitoring;
2. Presentation Function: this system can show the isolating switch residual life in real time, parameters such as dropout current number of times and current values and corresponding time;
3. communication function: can realize and the communicating by letter of transformer substation computer network by the RS-485 serial ports of this device.Can reach host computer to data, and carry out remote monitoring and warning etc.
Description of drawings
Fig. 1 is a vacuum circuit breaker electrical endurance monitoring apparatus composition frame chart of the present invention.
Fig. 2 is that vacuum circuit breaker electrical endurance monitoring apparatus embodiment 1 of the present invention forms synoptic diagram.
Fig. 3 is that vacuum circuit breaker electrical endurance monitoring apparatus embodiment 2 of the present invention forms synoptic diagram.
Embodiment
The vacuum circuit breaker electrical endurance monitoring apparatus that the present invention proposes reaches embodiment in conjunction with the accompanying drawings and further specifies as follows:
The functional-block diagram of apparatus of the present invention as shown in Figure 1, one or more control module on the spot that it comprises that current sensor, the analog to digital conversion that links to each other with this current sensor and data processor form, (only illustrate among the figure one the tunnel control module) on the spot, described each on the spot control module link to each other with industrial computer by signal-transmitting cable.
The principle of work of this device is (is example with one the tunnel): current sensor is placed on bus 1 next door or secondary current loop one side of connecting with vacuum circuit breaker, and stream has electric current I in the bus.Current sensor is exported a voltage signal u who is directly proportional with electric current I under the effect of electric current I.Analog to digital converter is converted to digital quantity with voltage signal u, by data transmission module and signal-transmitting cable digital quantity signal is delivered in the industrial computer again.Industrial computer calculates this digital quantity, draws corresponding bus current value.Under the control of the capture program of industrial computer, industrial computer is gathered in real time to the electric current I in the bus.When vacuum isolating switch 2 cuts off electric currents, or when electric current surpasses certain and preestablishes numerical value in the bus, under the control of the master routine of industrial computer, note this current value I
i, calculate corresponding electric life minimizing value I
i αAnd accumulative total electrical wear value (electric life minimizing value):
And on computer screen, show the residual electricity life-span numerical value Δ Q of this vacuum circuit breaker.
If device of the present invention is made up of the multiplexed signal sampling unit, then can detect the electric life of a plurality of vacuum circuit breakers.By industrial computer control, utilize serial communication mode (as: interface RS485 or RS232), by communication cable cycle detection is carried out on each road, transmit each road signal to industrial computer with single signal cable.The icon that each vacuum circuit breaker is arranged in the window of industrial computer display.With the icon of certain isolating switch of click, can obtain its various data, as this isolating switch residual life, parameters such as dropout current number of times and current values and corresponding time; Can set and revise the setting value of starting current.But the residual life of certain isolating switch is during near certain predetermined dangerous values, and industrial computer will provide the corresponding warning signal and can upload the remote scheduling center.
Embodiment 1
Present embodiment is for monitoring the vacuum circuit breaker electrical endurance monitoring apparatus with three tunnel signal gathering unit of three-phase vacuum breaker electric life simultaneously, it is made up of industrial computer I, control module II, sensor III three parts are formed on the spot, as shown in Figure 2 (each several part with dashed lines frame separates), specifically each ingredient and function are as follows:
1. industrial computer I: present embodiment adopts IRA360 type industrial computer, be positioned at the pulpit as host computer, pass through communication cable, gather each information of the relevant vacuum circuit breaker electrical endurance uploaded of control module (2) (can reach 128 at most) on the spot, carry out corresponding data storage and demonstration, and early warning information is uploaded the long-range IV of information center (IV of information center part does not belong to content of the present invention).
2. control module II on the spot: each unit is installed in the switch cubicle, each on the spot control module comprise microprocessor MCU (present embodiment adopt MC68HC908), A/D converter (the built-in device of MC68HC908), clock circuit (present embodiment adopts the 32.768K clock), memory RAM (the built-in device of MC68HC908), LCD (present embodiment adopts C1062-1) and keypad (the present embodiment employing universal product) etc.; Control module is responsible for gathering the three-phase current sensing (signal of the output of sensor C is also handled accordingly for sensors A, sensor B, shows and uploads industrial computer I on the spot.
3. sensor III: present embodiment adopts the air core coil of output voltage 3.5V effective value as sensor, dropout current when being used to measure vacuum circuit breaker and cut-offfing, each sensor are responsible for the current monitoring (as the flow through electric current of A phase vacuum circuit breaker of switch cubicle of sensor 1A monitoring) of No. one vacuum circuit breaker.
The course of work of this device is: on the bus next door of vacuum circuit breaker series connection or three current signals of the current sensor measurement three-phase bus (vacuum circuit breaker of flowing through) of secondary current loop one side, when the vacuum circuit breaker interrupting short circuit, gather current signal and (change electronegative potential into, low voltage signal), again via the A/D converter of microprocessor (MCU) control in the control module on the spot, three road signals are changed into digital quantity, carry out signal Processing, store and demonstration on the spot, behind the relevant information coding, through shielded cable this signal is transferred to industrial computer in the pulpit, carry out signal Processing by industrial computer by corresponding calculated, finish demonstration by corresponding module again, storage with function such as communicate by letter.
As shown in Figure 2, MCU in this device is responsible for calculating the weighting electrical wear amount of each turn-off current and the weighted cumulative electrical wear amount of accumulative total, and compare with (setting) electrical wear amount that allows, draw the residual electricity life-span of vacuum circuit breaker, and can show by the liquid crystal board of control module on the spot.With corresponding relevant information uploading industrial computer (3), whole device is coordinated by this MCU simultaneously.
Embodiment 2
Present embodiment detects principle and the main device that adopts is substantially the same manner as Example 1, its main difference is: only locate to install at bus place master switch (S) current sensor and on the spot control module detect the fault current of this place's isolating switch of flowing through, each load switch (S1, S2, Sn) locate no longer to install current sensor and reach control module on the spot, and the action situation of the switch of being uploaded in conjunction with the on off state testing circuit (as the S1 action), finally judge and calculate the electric life of each switch and store, show and upload by the industrial computer that is positioned at the pulpit.
Concrete each ingredient of present embodiment and function, as shown in Figure 3:
1. industrial computer: present embodiment adopts IRA360 type industrial computer.
2. control module on the spot: basic function is with embodiment 1, but calculates and the electric life of display switch herein and no longer.
3. sensor: identical with embodiment 1;
4. on off state testing circuit: form (the array EPM7128AECPLD that patrols able to programme that the scrambler of present embodiment adopts ALTERA company to produce by scrambler and MCU, MCU is all MC68HC908 mutually with embodiment 1), be used to detect each load switch cabinet switch (S1, S2 ... Sn) folding condition variation also is uploaded to unit, pulpit--industrial computer after respective coding.
The course of work of this embodiment is: a cover sensor (A is installed at the master control switch S place at bus place, B, the C three-phase) with control module on the spot, at other each (S1 of switch cubicle place, S2 ... Sn), [as opening is 1 (high level) only to need to gather the quantity of state of its switch by the on off state testing circuit, closure state is 0 (low level)], upload industrial computer behind the coding.During because of one tunnel load short circuits (as: S1), the short-circuit current of S1 of flowing through is almost equal with the short-circuit current of S of flowing through, the sensor electric current that records in S place can be considered the short-circuit current at S1 place like this, industrial computer will calculate the electric life of respective switch according to the information of the short-circuit current of uploading and the action situation of switch like this.
Claims (4)
1, a kind of vacuum circuit breaker electrical endurance monitoring apparatus, it is characterized in that, this device comprises by the bus that is arranged on the vacuum circuit breaker series connection or the current sensor of secondary current loop one side, one or more control module on the spot formed by analog to digital conversion and data processor that links to each other with this current sensor, described each on the spot control module link to each other with industrial computer by signal-transmitting cable.
2, vacuum circuit breaker electrical endurance monitoring apparatus as claimed in claim 1 is characterized in that, described control module on the spot comprises microprocessor, clock circuit, LCD and the keyboard of built-in analog to digital converter and storer.
3, a kind of vacuum circuit breaker electrical endurance monitoring apparatus, it is characterized in that, this device comprises the current sensor at master switch place of the bus that is arranged on vacuum circuit breaker series connection and the control module of being made up of analog to digital conversion and data processor on the spot that links to each other with this current sensor, the on off state testing circuit that links to each other with a plurality of load switches, by signal-transmitting cable respectively with this industrial computer of linking to each other of control module and on off state testing circuit on the spot.
4, vacuum circuit breaker electrical endurance monitoring apparatus as claimed in claim 3 is characterized in that, described control module on the spot comprises the microprocessor and the clock circuit of built-in analog to digital converter and storer.
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|---|---|---|---|
| CN 200510066027 CN1673767A (en) | 2005-04-22 | 2005-04-22 | Vacuum circuit breaker electrical endurance monitoring apparatus |
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|---|---|---|---|
| CN 200510066027 CN1673767A (en) | 2005-04-22 | 2005-04-22 | Vacuum circuit breaker electrical endurance monitoring apparatus |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819255A (en) * | 2010-04-16 | 2010-09-01 | 上海申瑞电力科技股份有限公司 | Nonlinear method for computing effective open and close times of breaker |
| CN102175881A (en) * | 2011-02-24 | 2011-09-07 | 常州市明及电气技术开发有限公司 | Speed online monitoring method of intelligent vacuum circuit breaker |
| CN102565693A (en) * | 2011-12-30 | 2012-07-11 | 上海电器科学研究所（集团）有限公司 | Mechanical and electrical service life testing system |
| CN102879735A (en) * | 2012-10-11 | 2013-01-16 | 桂林电子科技大学 | Online electric abrasion detecting method and system of vacuum circuit breaker |
| CN102915883A (en) * | 2011-08-05 | 2013-02-06 | 施耐德电器工业公司 | Electronic tripper |
| CN104793136A (en) * | 2015-05-07 | 2015-07-22 | 西安交通大学 | Service life monitoring device of high voltage SF6 circuit breaker |
| CN106449298A (en) * | 2015-08-13 | 2017-02-22 | 伊顿公司 | Circuit breaker operating mechanism component monitoring system and associated method |
| CN106449297A (en) * | 2015-08-13 | 2017-02-22 | 伊顿公司 | Electromechanical device for prognostic and diagnostic health assessment of a power circuit breaker's power transmission and distribution system in real time |
| CN106449296A (en) * | 2015-08-13 | 2017-02-22 | 伊顿公司 | Component monitoring system with monitory latch assembly |
| CN106505735A (en) * | 2016-11-23 | 2017-03-15 | 盛隆电气集团有限公司 | A kind of Centralized Monitoring display device and method for Intelligent low-voltage power distribution cabinet |
| CN107656200A (en) * | 2017-11-09 | 2018-02-02 | 北京长城华冠汽车技术开发有限公司 | A kind of battery relay life estimate device and evaluation method |
| CN108226769A (en) * | 2016-12-21 | 2018-06-29 | 伊顿公司 | For the system and method in the contact service life of observation circuit cutout |
| CN110007223A (en) * | 2019-04-22 | 2019-07-12 | 常州机电职业技术学院 | A kind of general folding service life instrument |
| CN110379673A (en) * | 2019-07-08 | 2019-10-25 | 广州小鹏汽车科技有限公司 | Relay protection method and device |
| CN112782571A (en) * | 2020-03-25 | 2021-05-11 | 天津市中力神盾电子科技有限公司 | Method, device and system for monitoring service life of circuit breaker |
| CN114730673A (en) * | 2020-02-24 | 2022-07-08 | 日立能源瑞士股份公司 | Method for monitoring the condition of a vacuum interrupter and electrical switching apparatus |
-
2005
- 2005-04-22 CN CN 200510066027 patent/CN1673767A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819255A (en) * | 2010-04-16 | 2010-09-01 | 上海申瑞电力科技股份有限公司 | Nonlinear method for computing effective open and close times of breaker |
| CN101819255B (en) * | 2010-04-16 | 2014-11-19 | 上海申瑞继保电气有限公司 | Nonlinear method for computing effective open and close times of breaker |
| CN102175881A (en) * | 2011-02-24 | 2011-09-07 | 常州市明及电气技术开发有限公司 | Speed online monitoring method of intelligent vacuum circuit breaker |
| CN102915883A (en) * | 2011-08-05 | 2013-02-06 | 施耐德电器工业公司 | Electronic tripper |
| CN102915883B (en) * | 2011-08-05 | 2015-04-22 | 施耐德电器工业公司 | Electronic tripper |
| CN102565693A (en) * | 2011-12-30 | 2012-07-11 | 上海电器科学研究所（集团）有限公司 | Mechanical and electrical service life testing system |
| CN102879735A (en) * | 2012-10-11 | 2013-01-16 | 桂林电子科技大学 | Online electric abrasion detecting method and system of vacuum circuit breaker |
| CN104793136A (en) * | 2015-05-07 | 2015-07-22 | 西安交通大学 | Service life monitoring device of high voltage SF6 circuit breaker |
| CN106449296A (en) * | 2015-08-13 | 2017-02-22 | 伊顿公司 | Component monitoring system with monitory latch assembly |
| CN106449297A (en) * | 2015-08-13 | 2017-02-22 | 伊顿公司 | Electromechanical device for prognostic and diagnostic health assessment of a power circuit breaker's power transmission and distribution system in real time |
| CN106449298A (en) * | 2015-08-13 | 2017-02-22 | 伊顿公司 | Circuit breaker operating mechanism component monitoring system and associated method |
| CN106449296B (en) * | 2015-08-13 | 2019-09-27 | 伊顿智能动力有限公司 | Component with monitoring latch assembly monitors system |
| CN106505735A (en) * | 2016-11-23 | 2017-03-15 | 盛隆电气集团有限公司 | A kind of Centralized Monitoring display device and method for Intelligent low-voltage power distribution cabinet |
| CN108226769A (en) * | 2016-12-21 | 2018-06-29 | 伊顿公司 | For the system and method in the contact service life of observation circuit cutout |
| CN107656200A (en) * | 2017-11-09 | 2018-02-02 | 北京长城华冠汽车技术开发有限公司 | A kind of battery relay life estimate device and evaluation method |
| CN110007223A (en) * | 2019-04-22 | 2019-07-12 | 常州机电职业技术学院 | A kind of general folding service life instrument |
| CN110379673A (en) * | 2019-07-08 | 2019-10-25 | 广州小鹏汽车科技有限公司 | Relay protection method and device |
| CN110379673B (en) * | 2019-07-08 | 2021-09-03 | 广州小鹏汽车科技有限公司 | Relay protection method and device |
| CN114730673A (en) * | 2020-02-24 | 2022-07-08 | 日立能源瑞士股份公司 | Method for monitoring the condition of a vacuum interrupter and electrical switching apparatus |
| CN114730673B (en) * | 2020-02-24 | 2023-11-28 | 日立能源瑞士股份公司 | Method for monitoring the condition of a vacuum interrupter and electrical switching apparatus |
| CN112782571A (en) * | 2020-03-25 | 2021-05-11 | 天津市中力神盾电子科技有限公司 | Method, device and system for monitoring service life of circuit breaker |
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