CN110045276A - Disconnecting switch load characteristic detection system in a kind of GIS device - Google Patents
Disconnecting switch load characteristic detection system in a kind of GIS device Download PDFInfo
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- CN110045276A CN110045276A CN201910387412.8A CN201910387412A CN110045276A CN 110045276 A CN110045276 A CN 110045276A CN 201910387412 A CN201910387412 A CN 201910387412A CN 110045276 A CN110045276 A CN 110045276A
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- disconnecting switch
- detection system
- load characteristic
- switch load
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention relates to disconnecting switch load characteristic detection systems in a kind of GIS device, including detection device (1), the device is for realizing the acquisition of data, demodulation, analysis processing and the display of result, the detection system further includes the diagnostic analysis system (2) connecting with detection device (1), and the diagnostic analysis system (2) is for being analyzed and processed on-site test data.Compared with prior art, the present invention has many advantages, such as that synchro measure, instantaneity are good, can provide Strategies of Maintenance.
Description
Technical field
The present invention relates to the fields gas switch insulator arrangement (GIS), negative more particularly, to disconnecting switch in a kind of GIS device
Carry Characteristics Detection system.
Background technique
GIS is the abbreviation of English Gas lnsulated Switchgear, the entitled SF6 fully closed combined electric unit of Chinese.It
By the primary equipment in a substation in addition to transformer, including breaker, disconnecting switch, earthing switch, voltage transformer,
Current transformer, arrester, bus, cable termination, inlet-outlet sleeve etc., optimized design are organically combined into an entirety.
GIS has compact-sized take up an area less, not by advantages such as external environment influences.Since GIS is extremely compact, although its reliability compared with
Height, but with the increase of the fortune vehicle time limit, various components parameter, performance also has the trend to degenerate.Compared with opening-type equipment,
It is influenced by power failure mode, the maintenance of GIS device is more difficult.Any internal component occurs bulging and is substantially all and can lead
Cause the abnormal conditions that power off time is long, power failure area is big.Disconnecting switch dosage is larger in GIS device, Disconnecting switch unit radix
More, number of faults absolute value is higher.In recent years, GIS device fault isolating switch repeatedly occurs in industry, leads to GIS
Equipment breakdown, loses huge.Currently, being examined without effective method and apparatus to disconnecting switch load characteristic in GIS device
It surveys.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide be isolated in a kind of GIS device
Switching load Characteristics Detection system.
The purpose of the present invention can be achieved through the following technical solutions:
Disconnecting switch load characteristic detection system in a kind of GIS device, including detection device (1), the device for realizing
Acquisition, demodulation, analysis processing and the display of result of data, the detection system further includes connecting with detection device (1)
Diagnostic analysis system (2), the diagnostic analysis system (2) is for being analyzed and processed on-site test data.
Preferably, the detection device (1) includes Hall current sensor (11), A/D conversion chip (12), corner biography
Sensor (13), I/O interface (14), CPU (15) and relevant function external member (16), the CPU (15) respectively with I/O interface
(14) with relevant function external member (16) connect, the I/O interface (14) respectively with A/D conversion chip (12), rotation angular sensing
Device (13) connection, the Hall current sensor (11) are connect with A/D conversion chip (12)；
Preferably, the function external member (16) includes power supply, RAM memory, the Flash connecting respectively with CPU (15)
Memory, display, clock, RS485 interface, RS232 interface and USB flash disk interface.
Preferably, the Hall current sensor (11) is used in the case where not changing original electric machine structure to motor
Electric current measures.
Preferably, the rotary angle transmitter (13) includes photoelectric encoder (131), shaft coupling (132) and gimbals
(133)；The photoelectric encoder (131) is mounted on gimbals (133), is fixed on and is kept apart by shaft coupling (132)
Close operating mechanism main shaft end.
Preferably, the shaft coupling (132) uses flexible axle, photoelectric encoder (131) and main shaft when for absorbing rotation
The deviation of decentraction is protected photoelectric encoder (131).
Preferably, the detection device (1) software flow the following steps are included:
S101: software initialization carries out data input, then executes S102；
S102: enter divide-shut brake selection interface, carry out manually selecting separating brake or combined floodgate, then execute S103；
S103: enter measurement interface, carry out corner acquisition and current acquisition, then execute S104；
S104: drawing waveform diagram and save, and then terminates epicycle processing logic.
Preferably, the current sample period is set as 2 °.
Preferably, the diagnostic analysis system (2) software flow the following steps are included:
S201: waveform diagram is generated according to the electric current of detection device acquisition and angle data, while generating needs and being compared
Waveform diagram, then execute S202；
S202: showing the waveform diagram that the waveform diagram of generation and needs are compared, and compares two waveform diagrams, then executes
S203；
S203: seeing if fall out threshold value, suggests if so, providing maintenance, then terminates epicycle processing logic, otherwise,
Directly terminate epicycle processing logic.
Preferably, the method that threshold value is seen if fall out in the S203 is mean value feedback method or point-to-point comparison method.
Compared with prior art, the invention has the following advantages that
One, synchro measure: in the present invention using Hall current sensor and rotary angle transmitter respectively to electric current and corner into
Row synchro measure.
Two, instantaneity is good: the present invention in diagnostic analysis system be instant analysis system, can to measurement gained electric current, turn
The variable quantities such as angle draw out waveform diagram by coordinate system, and are compared with historical data.
Three, can provide Strategies of Maintenance: the diagnostic analysis system in the present invention can judge state according to measurement result, and
Provide Strategies of Maintenance.
Detailed description of the invention
Fig. 1 is the system structure diagram of invention；
Fig. 2 is structure of the detecting device schematic diagram in invention；
Fig. 3 is Hall sensor schematic diagram of application structure in invention；
Fig. 4 is rotary angle transmitter structural schematic diagram in invention；
Fig. 5 is detection device software flow pattern in invention；
Fig. 6 is diagnostic analysis software flow figure in invention；
Shown in figure label:
1, detection device, 2, diagnostic analysis system；
11, Hall current sensor, 12, A/D conversion chip, 13, rotary angle transmitter, 14, I/O interface, 15, CPU, 16,
Function external member；
131, photoelectric encoder, 132, shaft coupling, 133, gimbals.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Embodiment
As shown in Figure 1, disconnecting switch load characteristic detection system in a kind of GIS device, including detection device 1, the device
For realizing the acquisition of data, demodulation, analysis processing and the display of result, the detection method and device further include diagnosis
Analysis system 2, the diagnostic analysis system 2 is for being analyzed and processed on-site test data.
As shown in Fig. 2, the detection device 1 includes Hall current sensor 11, A/D conversion chip 12, rotation angular sensing
Device 13, I/O interface 14, CPU15 and relevant function external member 16；The function external member 16 include power supply, RAM memory,
Flash storage, display, clock, RS485 interface, RS232 interface and USB flash disk interface；The Hall current sensor 11 is used
In being measured in the case where not changing original electric machine structure to current of electric.
In system operation, biggish motor AC or DC current are converted into lesser voltage by Hall sensor to be believed
Number, generally 0~5V, this signal is sent into A/D conversion chip and carries out analog-to-digital conversion, and the digital signal for obtaining representing current of electric connects
Enter I/O interface, this data result is stored in RAM memory by CPU, is mounted on the rotary angle transmitter on main shaft at the same time with master
Axis rotates together and issues electric signal related with corner, this signal carries out Data Format Transform by corner module internal circuit
(RS485) etc. the digital signal for representing corner is directly accessed in the RAM memory of CPU by I/O interface and is saved by processing.CPU
Current values are sampled with every 1-2 ° of corner by programming software, a series of arrays is obtained and saves into flash storage,
For checking, drawing.The device has corresponding data transmission interface, including RS485, RS232, USB flash disk interface, can use USB flash disk
Equal movable storage devices shift data.
The motor power of isolating switch motor structure has two kinds of AC and DC in GIS, and different user is selected one of.
Alternating current generator largely selects series excited machine, and direct current generator largely selects magneto, and the electric current of both motors is with load
Variation it is all more sensitive, measurement current of electric can directly reflect the variation of load, i.e. disconnecting switch is grasped using motor drive mechanism
When making, load resistance is bigger, and the operating current of motor is bigger, therefore measures motor working current and can directly reflect and keep apart
The bite situation of pass.
The conventional method of detection alternating current generator electric current is to use current transformer, fairly simple.Detect the electricity of direct current generator
Flowing conventional method is the series resistor in electric motor loop, and the pressure drop at detection resistance both ends is with Ohm's law come calculating current.This side
Case needs to change original equipment wiring, does not meet the requirement of on-site test.The invention is made centre path current using Hall effect and passes
Sensor when in-site measurement, need to will only pass in order not to change any wiring of original motor drive mechanism for sensor design into open-close type
Sensor, which clips on a motor power-supply wire, can acquire current of electric, meet the requirement of on-site test.
As shown in figure 3, the principle of Hall sensor is: when primary current Ip flows through a root long conducting wire, around conducting wire
A magnetic field will be generated, the size in this magnetic field is directly proportional to the electric current for flowing through conducting wire, and the magnetic field of generation is gathered in magnet ring, leads to
The Hall element crossed in magnet ring air gap measures and amplifies, compensates output, and output voltage Vs can accurately react primary side
Electric current Ip.
As shown in figure 4, the rotary angle transmitter 13 includes photoelectric encoder 131, shaft coupling 132 and gimbals 133；
The shaft coupling 131 is located on motor output shaft；The photoelectric encoder 131 is fixed on disconnecting switch behaviour by shaft coupling 132
Make mechanism spindle nose；The shaft coupling 132 uses flexible axle, and photoelectric encoder 131 is different from main shaft when for absorbing rotation
The deviation of the heart protects photoelectric encoder 131.
Photoelectric encoder is that one kind by photoelectric conversion converts the mechanical geometric displacement on the output shaft to pulse or number
The sensor of word amount.Photoelectric encoder is made of grating disc and photoelectric detection system.Grating disc is on the plectane of certain diameter
Partially open several slots.Since photoelectric code disk and motor drive mechanism output shaft are coaxial, when motor drive mechanism main shaft rotates,
Grating disc rotates at the same speed with motor drive mechanism, and the detection device detection through the electronic components such as light emitting diode composition exports several pulses
Signal, the number that pulse is exported by calculating photoelectric encoder can reflect the rotational angle of motor drive mechanism main shaft, pulse letter
Number pass through the port I/O of cable input interface.Photoelectric encoder has the characteristics that precision height, long service life.
As shown in figure 5, the software flow of the detection device 1 the following steps are included:
S101: software initialization carries out data input, then executes S102；
S102: enter divide-shut brake selection interface, carry out manually selecting separating brake or combined floodgate, then execute S103；
S103: enter measurement interface, carry out corner acquisition and current acquisition, then execute S104；
S104: drawing waveform diagram and save, and then terminates epicycle processing logic.
As shown in fig. 6, the software flow of the diagnostic analysis system 2 the following steps are included:
S201: waveform diagram is generated according to the electric current of detection device acquisition and angle data, while generating needs and being compared
Waveform diagram, then execute S202；
S202: showing the waveform diagram that the waveform diagram of generation and needs are compared, and compares two waveform diagrams, then executes
S203；
S203: seeing if fall out threshold value, suggests if so, providing maintenance, then terminates epicycle processing logic, otherwise,
Directly terminate epicycle processing logic.
Diagnostic analysis system is the software being analyzed and processed in the computer of backstage to on-site test data, is drawn except having
Using rotational angle theta as X-axis, with electric current I be Y draw f=I (θ) divide-shut brake waveform diagram function outside, moreover it is possible to will currently with history waveform diagram tune
Enter same coordinate system and carry out analysis comparison, exports early warning value and maintenance direction opinion.Also have the function of to save, inquire, search for etc..
The method that threshold value is seen if fall out in the S203 is mean value feedback method or point-to-point comparison method.
One, mean value feedback method
Table 1 is data measured by 2012 and 2019, calculates separately the average value of institute's measured data twice:
PL1=(L10+L11+...+L1n)/n (1.1)
PL2=(L20+L21+...+L2n)/n (1.2)
Calculate the accounting M of average value twice:
Indicate that current detection numerical value is greater than historical values if M is negative value, load increases, can judge according to numerical values recited
Whether have a power failure maintenance is needed, this numerical value is exactly to overhaul early warning value.
When some point electric current increase is more, but influences little to average value, this scheme cannot judge that such part is different
Often.
Table 1
| Angle, θ 0 | 0 | 2 | … | 45 | … | 90 | … | 135 | 250 | Average value | |
| Electric current L2 | 0 | L20 | L21 | L2n | PL2 | 2019 | |||||
| Electric current L1 | 0 | L10 | L11 | L1n | PL1 | 2012 |
Two, point-to-point comparison method
Equally, table 2 is data measured by 2012 and 2019, measurement data will be compared point by point twice
That is:
Indicate that the current detection numerical value of the point is greater than historical values if Vn is negative value, load increases, and need to be according to number
The components that the size of value corresponds to rotation angle position judge whether to need the position repaired and need to overhaul that has a power failure.
Table 2
| Angle, θ 0 | 0 | 2 | … | 45 | … | 90 | … | 135 | … | 250 | |
| Electric current L2 | 0 | L20 | L21 | L2n | 20195 | ||||||
| Electric current L1 | 0 | L10 | L11 | L1n | 2012 | ||||||
| Components | Fingertip | Pin 1 | Pin 2 | Spring | |||||||
| Percentage V | 0 | V0 | V1 | Vn |
The present invention has following innovative point:
1, synchro measure: electric current and corner are synchronized using Hall current sensor and rotary angle transmitter in the present invention
Measurement, record.
2, instant analysis: the diagnostic analysis system in the present invention is instant analysis system, to measurement gained electric current, corner etc.
Variable quantity draws out waveform diagram by coordinate system, and analysis is then compared with historical data.
3, Strategies of Maintenance can be provided in time: there is expert system, state can be judged according to measurement result, and provide inspection
Repair strategy.
At present both at home and abroad to none effective monitoring means of GIS mesohigh disconnecting switch mechanical breakdown, production can only be relied on
The existing quality of product and field personnel's subjective experience and technical capability cannot promptly and accurately judge potential mechanical breakdown, past
Toward but operation failure due to mechanical breakdown when in use, power supply reliability and electric power netting safe running are influenced.The device is realized to GIS
Middle disconnecting switch load performance is detected, is analyzed, and objective, accurately can be judged disconnecting switch state, extremely early discovery
Potential faults.After disconnecting switch installation and debugging, its state is detected, to determine whether that there are primitiveness defects.
Its state can be detected at the scene after it puts some time into operation, analyze the variation tendency of its important parameter to predict
Whether defective presence, to provide scientific basis for repair based on condition of component.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. disconnecting switch load characteristic detection system in a kind of GIS device, including detection device (1), the device is for realizing number
According to acquisition, demodulation, analysis processing and result display, which is characterized in that the detection system further include with detection fill
The diagnostic analysis system (2) of (1) connection is set, the diagnostic analysis system (2) is for carrying out at analysis on-site test data
Reason.
2. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 1, which is characterized in that institute
The detection device (1) stated includes Hall current sensor (11), A/D conversion chip (12), rotary angle transmitter (13), I/O interface
(14), CPU (15) and relevant function external member (16), the CPU (15) respectively to I/O interface (14) and relevant functional sleeve
Part (16) connection, the I/O interface (14) connect with A/D conversion chip (12), rotary angle transmitter (13) respectively, it is described suddenly
You connect current sensor (11) with A/D conversion chip (12).
3. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 2, which is characterized in that institute
The function external member (16) stated include connect respectively with CPU (15) power supply, RAM memory, flash storage, display, when
Clock, RS485 interface, RS232 interface and USB flash disk interface.
4. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 2, which is characterized in that institute
The Hall current sensor (11) stated is for measuring current of electric in the case where not changing original electric machine structure.
5. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 2, which is characterized in that institute
The rotary angle transmitter (13) stated includes photoelectric encoder (131), shaft coupling (132) and gimbals (133)；The photoelectricity is compiled
Code device (131) is mounted on gimbals (133), is fixed on isolator operating mechanism spindle nose by shaft coupling (132).
6. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 5, which is characterized in that institute
The shaft coupling (132) stated uses flexible axle, the deviation of photoelectric encoder (131) and main shaft decentraction when for absorbing rotation, protection
Photoelectric encoder (131).
7. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 2, which is characterized in that institute
The software flow of the detection device (1) stated the following steps are included:
S101: software initialization carries out data input, then executes S102；
S102: enter divide-shut brake selection interface, carry out manually selecting separating brake or combined floodgate, then execute S103；
S103: enter measurement interface, carry out corner acquisition and current acquisition, then execute S104；
S104: drawing waveform diagram and save, and then terminates epicycle processing logic.
8. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 7, which is characterized in that institute
The current sample period stated is set as 2 °.
9. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 1, which is characterized in that institute
The software flow of the diagnostic analysis system (2) stated the following steps are included:
S201: waveform diagram is generated according to the electric current of detection device acquisition and angle data, while generating the wave for needing to be compared
Shape figure, then executes S202；
S202: showing the waveform diagram that the waveform diagram of generation and needs are compared, and compares two waveform diagrams, then executes
S203；
S203: seeing if fall out threshold value, suggests if so, providing maintenance, then terminates epicycle processing logic, otherwise, directly
Terminate epicycle and handles logic.
10. disconnecting switch load characteristic detection system in a kind of GIS device according to claim 9, which is characterized in that institute
The method that threshold value is seen if fall out in the S203 stated is mean value feedback method or point-to-point comparison method.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806310A (en) * | 2019-09-27 | 2020-02-18 | 国网浙江省电力有限公司杭州供电公司 | Online monitoring method and device for mechanical characteristics of high-voltage isolating switch operating mechanism |
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| JPH07333279A (en) * | 1994-06-14 | 1995-12-22 | Meidensha Corp | Leakage test equipment |
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Application publication date: 20190723 |