CN109143051A - Bilateral grounding type Online Transaction Processing for switching devices and test method - Google Patents
Bilateral grounding type Online Transaction Processing for switching devices and test method Download PDFInfo
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- CN109143051A CN109143051A CN201810919515.XA CN201810919515A CN109143051A CN 109143051 A CN109143051 A CN 109143051A CN 201810919515 A CN201810919515 A CN 201810919515A CN 109143051 A CN109143051 A CN 109143051A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
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Abstract
The invention discloses a kind of bilateral grounding type Online Transaction Processing for switching devices and test methods, it is related to power equipment the field of test technology, and in particular to a kind of bilateral grounding type on-line testing equipment and test method that compbined test is carried out to defeated, change, distribution line switchgear.Technical solution of the present invention includes tested switchgear and the action drives device for controlling tested switchgear divide-shut brake, further includes: host, connecting cable, ground line, current sensor；Wherein, the ground line for connecting tested switchgear the same side binding post is electrically connected with the weldering stake of same ground connection, and the ground connection weldering stake is electrically connected by the connecting cable with the constant current source output terminal in host respectively.The present invention is intended to provide a kind of improve switchgear power failure test efficiency, Optimum Experiment process, the Online Transaction Processing and test method for reducing operational risk.
Description
Technical field
The present invention relates to power equipment the field of test technology, and in particular to it is a kind of to it is defeated, become, distribution line switchgear into
The bilateral grounding type on-line testing equipment and test method of row compbined test.
Background technique
Switchgear includes the routes division brake apparatus such as breaker, disconnecting link, switchgear, air-break circuit-breaker, low tension switch, is
Important equipment in defeated, change, distribution system, and usage amount is very big.By taking breaker as an example, a general 220kV substation
Interior breaker is about in 20-30 platform.According to requiring, power supply company answers regular switching devices to be tested, to judge to switch
Status of equipment, removal system hidden danger.The test of switchgear mainly includes mechanical characteristic test and loop circuit test etc..It is existing
When carrying out power failure test to online switchgear, it is primarily present following problems: needing when a) switchgear has a power failure in its bilateral
Suspension ground line, i.e. bilateral are grounded, but have a power failure when testing and generally required to remove unilateral ground line again, and process is more；B) it removes
It connects wires and needs frequently to lift insulating bar, be easy to happen down bar to adjacent electrification and be spaced, lead to electric shock accidents, risk is high；C) it removes
Needs of connecting wires are not easy to improve by regulation, O&M and the agreement of three departments of maintenance, the efficiency of management, and the preparatory period is long；D) to online
The power failure of equipment is tested, because its installation site is high, when test generally requires several staff on ground or operating platform
It lifts 3 to 5 meters long of insulating bar to carry out tearing extension work open, tears extension work open and have to comply with regulation, the once-through operation time is longer, test efficiency
It is low；E) test apparatus with cable of different tests are different, and the mode of connection is generally also different, so scene holds when having a power failure test
Easily disorderly, standardized management is difficult for wiring.
In the prior art to the loop resistance testing equipment of the switchgear of two sides earth, all think that earth mat resistance is much larger than
The loop resistance of switchgear, therefore be insignificant, but in practical operation, there are missing inspection defects for this measurement form.Very
More varieties in saline-alkali areas and copper ground web area (especially at substation's low tension switch), earth mat resistance very little, only switchgear returns
Several times, Ji Shibei of road resistance, when a flow of electric current is passed through it, it is very big that network part is through-flow, this portion of electrical current be can not ignore, if
Algorithm or wiring before also using there is very big error, lead to the erroneous judgement to equipment.
Summary of the invention
The present invention is intended to provide a kind of raising switchgear power failure test efficiency, Optimum Experiment process, reduction operational risk
Online Transaction Processing and test method.
Specific technical solution of the present invention is:
A kind of bilateral grounding type Online Transaction Processing for switching devices, including tested switchgear and the tested switch of control are set
The action drives device that back-up closes a floodgate, further includes:
Host, the host are internally provided with central processing unit and the constant-current source connecting respectively with central processing unit, communication mould
Block, display module, operation panel and grafting panel, the host is connect with action drives device and the driving of control action driver
Tested switchgear divide-shut brake；
Connecting cable, described connecting cable one end are detachably connected by grafting panel with host, and the other end is fixed with and is grounded
The clamping joint that weldering stake connects and fixes；
Ground line, described ground line one end are electrically connected with the binding post of tested switchgear, and the other end is electrically connected with ground connection weldering stake；
Current sensor, the current sensor are connect by grafting panel with host, and tested switchgear circuit is set to, and are used
The electric current of tested switchgear is flowed through in detection；The tested switchgear circuit refers to circuit where its each phase contact, or
Circuit of each phase contact by grounding point after in parallel；
Wherein, the ground line for connecting tested switchgear the same side binding post is electrically connected with the weldering stake of same ground connection, the ground connection weldering
Stake is electrically connected by the connecting cable with the constant current source output terminal in host respectively.
The technical solution further improvement lies in that: constant-current source be ac/dc constant-current source.
The technical solution further improvement lies in that: be additionally provided with voltage sensor in machine, the voltage sensor input
Stake is welded with the ground connection by the connecting cable respectively and is connect in end.
The technical solution further improvement lies in that: in central processing unit be equipped with storage measurement record storage unit.
A kind of bilateral grounding type on-line testing method for switching devices, comprising: the quilt of action drives device will be connected with
Switchgear two sides binding post is surveyed to be grounded respectively；In tested switchgear two sides parallel connection constant-current source, and measure switchgear circuit
The first electric current；The second electric current of switchgear two sides earth-continuity is calculated by the electric current of constant-current source and the first electric current；Pass through
The appearance of first electric current judges the end time of making process in tested switchgear mechanical characteristic test, passes through the first electric current
Disappearance judge end time of separating brake process in tested switchgear mechanical characteristic test；Tested set is calculated by the first electric current
Standby loop resistance；The earth-continuity for the grounding point connecting with tested switchgear is calculated by the second electric current.
Further, it is operated as follows using the equipment in technical solution of the present invention:
A) after the power failure of tested switchgear, the binding post of its two sides is passed through to ground line respectively and is connect with two ground connection weldering stakes；
B) clamp of the first cable and the second cable is connect with ground connection weldering stake respectively；
C) tested switchgear separating brake is enabled, enables host control constant-current source stablize the first electric current of output, and obtain tested switchgear
Two sides first voltage obtains the earth-continuity of tested switchgear two sides using the first electric current and first voltage；
D) it enables the tested switch of drive control device control close a floodgate, judges that it is mechanical special according to the time that tested switchgear electric current occurs
Property closing time index, while after the completion of combined floodgate record by be tested switchgear circuit the second electric current and second voltage,
The loop resistance of tested switch is obtained using the second electric current and second voltage；
E) the tested switch separating brake of drive control device control is enabled, judges that it is mechanical special according to the time of tested switchgear current vanishes
Property opening time index.
In one embodiment in the technical solution of the present invention, the tested switchgear is threephase switch equipment, ground connection
When, every survey three-phase binding post is connected to the same grounding point.
In one embodiment in the technical solution of the present invention, the constant-current source is industrial frequency AC constant-current source.
To illustrate in the embodiment of the present invention, the present invention can be had the benefit that
1) after tested switchgear completes power failure movement, ground line can be retained and carry out subsequent mechanical characteristic test, circuit electricity
Resistance test, loop voltage test while the earth-continuity for detecting live grounding point；2) technical solution of the present invention can be in same examination
Aforementioned four test assignment is completed during testing；3) the divide-shut brake number for reducing switchgear periodic test, extends out
Close the service life of equipment；4) reduce pull rod operation, reduce the risk of falling bar, shorten test period.
Technical solution of the present invention has the working method of innovation, has abandoned the testable working method in the tradition side of taking out stitches；Change
Good test philosophy is become by monitoring voltage variation of the taking out stitches monitoring current that is changed to exempt to take out stitches；It ensure that work safety, no longer tear mounting open
Ground wire evades induced electricity and hurts sb.'s feelings, the work risk for the electric shock of falling bar；It promotes working efficiency, saves 3/4 and tear extension work open, when work
Between by shorten 70%, testing crew reduce half, test apparatus reduce half.
Detailed description of the invention
With reference to embodiments and attached drawing makes specific descriptions to the present invention:
Fig. 1 is the working principle diagram of present system embodiment；
Fig. 2 is the wiring schematic diagram of Fig. 1 system；
Fig. 3 is the local circuit schematic diagram of interface section in host in Fig. 2；
Fig. 4 is the flow diagram that the method for the present invention is realized using system in Fig. 1；
Wherein, 101, tested switchgear, 102, action drives device, 103, ground connection weldering stake, 104, host, 105, ground line,
201, constant-current source, 202, connecting cable, 203, central processing unit, 204, current sensor, 205, voltage sensor.
Specific embodiment
Further description is made to technical solution of the present invention with attached drawing combined with specific embodiments below.
As shown in Figure 1 and Figure 2, the present embodiment is a kind of bilateral grounding type Online Transaction Processing for switching devices, packet
Include: tested switchgear, the action drives device for controlling tested switchgear divide-shut brake, test host, connection cables, ground line with
And current sensor.
In the present embodiment, host be internally provided with central processing unit and the constant-current source being connect respectively with central processing unit,
Communication module, display module, voltage sensor and operation panel.When specific implementation, central processing unit, which is selected, has high-precision
AD acquires 32 monolithic processors of port and DA output port, and constant-current source uses the AC and DC adjustable current based on IGBT
Source, when constant-current source works in exchange status, output frequency is 50Hz power frequency, and central processing unit passes through modulation pulse control constant current
Source exports size of current and waveform；Display module is the LCD Panel controlled by central processing unit, and operation module is A/D volume
Code key disk；Communication module is WIFI chip or zigbee communication chip, has what is connect with drive control device to connect on grafting panel
Mouthful, for sending divide-shut brake signal to drive control device, make drive control device control switch equipment divide-shut brake.
In another embodiment of the present invention, central processing unit is built-in with wireless communication module, by with wireless communication module
The radio-frequency antenna of connection communicates wirelessly.
In the present embodiment, being tested switchgear is threephase switch equipment, and one end of ground line connects with tested switchgear
Terminal electrical connection, the other end are electrically connected with ground connection weldering stake 103.When it is implemented, ground line is the six roots of sensation, it is divided into two groups, every group three
Root, wherein first group three piece-root grafting electric wire one end, which are connected to, to be connect with tested the first side of switchgear three-phase binding post
On cable, that is, do not remove the wiring of original the first side of tested switchgear, the other end of first group of three piece-root grafting electric wires is total
Stake is welded with the first ground connection is connected to；Second group three piece-root grafting electric wire one end are connected to and tested switchgear second side three-phase
On cable of binding post connection, that is, do not remove the wiring of original tested switchgear second side, second group of three piece-root graftings electricity
The other end of line is commonly connected to the weldering stake of the second ground connection.
In the present embodiment, current sensor is connect by grafting panel with host, is set to tested switchgear circuit, is used
The electric current of tested switchgear is flowed through in detection；In specific implementation, current sensor is the non-contact current sensor of open type, because
Using the fixed form of above-mentioned first cable, so having current sensor line when using the clamping ground connection weldering stake of the first clamp
Circle side is covered in the circuit side close to tested switchgear.
In the present embodiment, connecting cable one end is detachably connected by grafting panel with host, and the other end is fixed with can be with
The clamping joint that ground connection weldering stake connects and fixes.When it is implemented, tested switchgear is threephase switch equipment；The card street corner can be
Electric power often uses three-phase clamp, which can be used for current measurement by electric current, it may have voltage measurement contact is to three-phase electricity
Pressure measures；Connecting cable includes: the first cable, and first cable one end is fixed with closely to be connect with the first ground connection weldering stake
The first clamp, the other end is fixed with the connector with jack grafting mating on grafting panel, this is fixed on first clamp
Current sensor described in embodiment, current sensor are three and are fixed on ground connection weldering stake in the first clamp while entangling respectively
Circuit where threephase switch contact, the non-contact current sensor are connect with central processing unit；Second cable, described
Two cable one end, which are fixed with, closely connect the second clamp with the second ground connection weldering stake, and the other end is fixed with and matches inserting on grafting panel
The connector of hole grafting.The connector of first cable and the second cable is connect with the output end of constant-current source respectively.
In another embodiment of the present invention, the three piece-root grafting ground wires and ground connection weldering stake for being set to threephase switch equipment the same side connect
Bifurcation before contact, three current sensors are separately provided, and are wired to grafting panel, and and central processing respectively
Device connection.
In another embodiment of the present invention, being tested switchgear is single-phase switch equipment, the electric current being arranged on the first cable
Sensor is one.
In the present embodiment, be additionally provided with voltage sensor in host, the clamp of the first cable and the second cable respectively with institute
The measurement end connection of voltage sensor is stated, voltage sensor is for measuring constant-current source both end voltage；Voltage sensor acquisition interval
Less than 0.1ms, it is poor with the operating frequency phase of constant current source output current to be calculated by central processing unit.
In the present embodiment, there is power down nonvolatile storage in central processing unit, wherein part memory space is for storing
Application program, part control is used to store the storage unit of measurement record, when the measurement record of storage can be run by application program
It is sent to the PC connecting with host communication or tablet device by communication module, by the application program run on PC or tablet device
It handles and shows.
As shown in figure 3, host described in the embodiment of the present invention is equipped with A/D keyboard as operation module, it is equipped with liquid crystal conduct
Display module, operation module and display module are connect with central processing unit (CPU) respectively；CTC is the electricity on main machine transplanting of rice junction plate
Flow sensor interface, KC, KN are the drive control device interface on main machine transplanting of rice junction plate, for connecting with the input terminal of drive control device
It connects, wherein KC connects drive control device input signal end, and KN connects drive control device common end.
The present embodiment further includes a kind of bilateral grounding type on-line testing method for switching devices, which uses
Above system is completed, and the tested switch of the test of mechanical characteristic test and loop resistance and connection of achievable tested switchgear is set
Earth-continuity at standby ground connection weldering stake, while assessing earth mat index.The test method, which specifically includes that, will be connected with action drives
The tested switchgear two sides binding post of device is linked with the weldering stake of more than two ground connection respectively, makes tested switchgear two sides difference
Ground connection；It is separately connected constant current source output terminal in tested switchgear two sides, keeps tested switchgear in parallel with constant-current source, centre
Manage device control constant-current source export specified size, direction, waveform and frequency electric current, and switched using above-mentioned current sensor measurement
First electric current in equipment circuit；The second electricity of switchgear two sides earth-continuity is calculated by the electric current of constant-current source and the first electric current
Stream；The end time that making process in tested switchgear mechanical characteristic test is judged by the appearance of the first electric current, pass through
The disappearance of first electric current judges the end time of separating brake process in tested switchgear mechanical characteristic test；Pass through the first galvanometer
Calculate the loop resistance of equipment under test；The earth-continuity for the grounding point connecting with tested switchgear is calculated by the second electric current.
Specifically to use the present embodiment above system to being that tested switchgear carries out experimental test and is with three-phase breaker
Example, as shown in figure 4, steps are as follows:
S01: before experimental test, the power down of three-phase breaker is completed according to conventional steps, the binding post of its two sides is distinguished
Stake is welded with two ground connection by ground line to connect.Specifically, retaining the original primary connection of three-phase breaker, by first group of three piece-root grafting
One end of ground wire is connected with first three primary connections for flanking terminal for connecting three-phase breaker respectively, first group of three piece-root grafting
The other end of line is commonly connected to the weldering stake of the first ground connection；By one end of second group of three piece-root grafting ground wire respectively with connect three-phase breaker
Second side binding post three primary connections connection, the other end of second group of three piece-root grafting ground wire be commonly connected to the second ground connection weldering
Stake.Three groups of contacts between first side of three-phase breaker and second side form parallel relationship in its combined floodgate, the first side and the
The Z in equivalent resistance, that is, Fig. 1 between two sides1。
S02: the clamp of the first cable and the second cable is connect with ground connection weldering stake respectively.Specifically, the first cable
The one end and the first ground connection weldering stake for being fixed with the first clamp are reliably clamped, and the other end is inserted into host grafting panel and central processing unit
Connection；Second cable is fixed with one end of the second clamp and the second ground connection weldering stake is reliably clamped, and the other end is inserted into host plug surface
Plate is connect with central processing unit；Constant-current source 201 in Fig. 1 is formed after the completion of connection, any road contact is equivalent in three-phase breaker
Resistance Z1, voltage sensor and earth mat equivalent resistance Z2Parallel circuit, the current sensor on the first clamp are covered in Z1Place is returned
Lu Zhong operates additionally by the pull rod of insulating bar, drive control device is fixed on three-phase breaker, drive control device can pass through machine
Tool structure drives three-phase breaker divide-shut brake.
S03: enabling tested switchgear separating brake, enables host control constant-current source stablize the first electric current of output, and obtain tested open
Equipment two sides first voltage is closed, the earth-continuity of tested switchgear two sides is obtained using the first electric current and first voltage.Specifically
, central processing unit issues separating brake instruction to drive control device, and drive control device is complete by mechanical structure control three-phase breaker
After separating brake, central processing unit controls constant-current source and exports power frequency 50Hz sinusoidal current, and current effective value 300A is passed by voltage
Sensor measures current first voltage, measures earth mat impedance, the i.e. exchange of earth mat equivalent resistance by the first electric current and first voltage
Impedance Z2, Z2It is that the weldering stake of the first ground connection is connected indirectly with earth mat, the second ground connection welds stake and earth mat is connected indirectly and earth mat hinders
Anti- sum, Z2The earth-continuity of the weldering stake of the first ground connection and the second ground connection weldering stake and the size of earth mat stray capacitance are embodied, such as
Fruit Z2Qualification, then related ground conducting and earth mat evaluation index are up to standard.
S04: it enables the tested switch of drive control device control close a floodgate, it is judged according to the time that tested switchgear electric current occurs
Mechanical property closing time index, while the second electric current and second that record passes through tested switchgear circuit after the completion of combined floodgate
Voltage obtains the loop resistance of tested switch using the second electric current and second voltage.Specifically, central processing unit first controls constant current
Source exports 300A direct current output, then issues order of closing a floodgate to drive control device, starts simultaneously at timing, when passing through current sensor
When detecting the second electric current by three-phase contactor, stop timing, which is that three groups of contacts of three-phase breaker are closed
The lock time obtains earth mat by the stationary value of constant current source output current size and the second electric current when the second electric current stablizes constant
Electric current calculates breaker impedance loop, algorithm are as follows: impedance loop=earth mat by earth mat electric current, earth mat impedance and the second electric current
Impedance (the second electric current/earth mat electric current).In another embodiment, host obtains the second electric current by current sensor and stablizes not
Change when value, while the second voltage of three-phase breaker both ends at this time has been obtained by voltage sensor, has passed through the second electric current
Impedance loop, algorithm are as follows: impedance loop=second voltage/the second electric current are obtained with second voltage；Switch is tested in the present embodiment to set
Standby is three-phase equipment, and the current sensor is respectively arranged in the circuit of tested switchgear three-phase contact, therefore, in this step
Second electric current of the middle available three-phase of reality to obtain the loop resistance of three-phase contact, while also obtaining the second electricity of three-phase
The respective stable time of stream.
S05: the tested switch separating brake of drive control device control is enabled, it is judged according to the time of tested switchgear current vanishes
Mechanical property opening time index.Specifically, central processing unit first controls constant-current source output 300A direct current output, then to driving
Controller issues separating brake order, starts simultaneously at timing, detects when by current sensor through the second electric of three-phase contactor
When stream is zero, stop timing, which is three groups of contact opening times of three-phase breaker.
Working principle
In above-described embodiment, when there are ground line in breaker two sides, the independent constant-current source of three-phase is added at both ends, is formed
Circuit closed circuit.The division of breaker acts, and can cause the variation of electric current in circuit.Current sensor is introduced, is also possible to
Clamp on amperemeter is directly stuck on unilateral ground line, judges breaker by the variation of current signal in monitoring clamp on amperemeter
Equipment division state, actuation time complete breaker operating characteristic experiment work.
In above-described embodiment, pass through the ground line of breaker two sides, the constant-current source of test apparatus output, the closure electricity of formation
Road is flowed back to, voltage signal is directly taken, resistance value can be obtained.Clamp on amperemeter can measure the division state of breaker, movement again
Time, therefore breaker loop resistor and acting characteristic pilot project can be tested simultaneously.
In above-described embodiment, host store to all test datas and connect by communication module with database,
PMS system and equipment factory information are docked, automatically extracts breaker producer testing standard, historical test data and with factory's homotype
The relevant informations such as number equipment test data, by significant difference scheduling algorithm, by test data carry out laterally, it is longitudinal compare, can
To provide breaker apparatus state evaluation score, real-time judge equipment state.
Practical application compares
Technical solution of the present invention started to be widely popularized in 2018, which has been applied to practical by more ground Utilities Electric Co.
It is effective in terms of safety, economy, management, social benefit in work (including combined electrical apparatus).
Safety benefit: saved about 15 times act bars tear open, hanging wire operation, evaded the induced electricity electric shock risk and electric shock of falling bar
Problem ensure that the person and equipment safety.
Economic benefit: test period was foreshortened to 1 hour by 3 hours, and testing crew foreshortens to 2 people, labour production by 4 people
Rate is promoted to (1 hour * 2 people)/1=2 hour/part by (3 hours * 4 people)/1=12 hour/part.
* 200 times=4.8 ten thousand yuan of recruitment cost=(3-1) hour * (4-2) 60 yuan/people of people * hour is saved, sale of electricity is increased
Measuring income is about 19.5 ten thousand yuan.The accumulative first half of the year in 2018 is 24.3 ten thousand yuan of enterprise's additional income.
Management and social benefit: tripartite's connection of regulation, O&M, maintenance is avoided, breaker experiment work has been saved
Power off time promotes the management efficiency of enterprises, guarantees the reliable supply of society's electricity consumption, establishes company's favorable image.
The innovation achievement can carry out circuit-breaker testing work without removing ground line, can also equally apply in combination electricity
Device field.The achievement is worth promoting in terms of safety, management, social performance.In economic aspect, on 6 ground of Southern Hebei Network
After the application of company of city, recruitment cost will be saved about: 4.8 ten thousand yuan * 6 * 2=57.6 ten thousand yuan, increasing electricity sales amount income about: 19.5 ten thousand
First * 6 * 2=2,340,000 yuan.
Technical solution provided by the invention is easy to operate, and reproducibility is strong, can be mass, and is conducive to wide popularization and application.
Referring to Guo Wang company electrical test equipment configurations principle, power supply company of districts and cities need at least be equipped with 2, the device, electric power
Internal system market at least needs to be equipped with instrument number of units to be about 600.According to investigation, National Power System maintenance model is similar, should
Device is also applied for all units popularization and application that railway, power generation, steel mill etc. possess breaker, and demand is about network system
30%, about 180, through price accounting, calculated with every 20,000 yuan of profit (cosxts involved in determining price by core technology research and development, hardware device,
The composition such as technical support, after-sale service, product promotion, about 40,000 yuan, ten thousand yuan of selling price 6-8), profit margin is about 780 * 2
Ten thousand yuan=15,600,000, promotion prospect is wide.
Claims (8)
1. a kind of bilateral grounding type Online Transaction Processing for switching devices, including tested switchgear (101) and control quilt
Survey the action drives device (102) of switchgear divide-shut brake, which is characterized in that further include:
Host (104), the constant current that the host (104) is internally provided with central processing unit and connect respectively with central processing unit
Source (201), communication module, display module, operation panel and grafting panel, the host (104) and action drives device (102)
It connects and control action driver (102) drives tested switchgear (101) divide-shut brake；
Connecting cable (202), described connecting cable one end are detachably connected by grafting panel with host (104), and the other end is solid
Surely there is the clamping joint connected and fixed with ground connection weldering stake (103)；
It is grounded (105), described ground line one end is electrically connected with the binding post of tested switchgear, the other end and ground connection weldering stake
(103) it is electrically connected；
Current sensor (204), the current sensor are connect by grafting panel with host, are set to tested switchgear and are returned
Road, for detecting the electric current for flowing through tested switchgear；
Wherein, the ground line for connecting tested switchgear the same side binding post is electrically connected with same ground connection weldering stake (103), described to connect
Ground weldering stake (103) is electrically connected by the connecting cable (202) with constant-current source (201) output end in host respectively.
2. bilateral grounding type Online Transaction Processing for switching devices according to claim 1, it is characterised in that: described
Constant-current source is AC or DC constant-current source.
3. bilateral grounding type Online Transaction Processing for switching devices according to claim 2, it is characterised in that: host
It is inside additionally provided with voltage sensor, the voltage sense input welds stake by the connecting cable and the ground connection respectively and connects
It connects.
4. bilateral grounding type Online Transaction Processing for switching devices according to claim 3, it is characterised in that: center
The storage unit of storage measurement record is equipped in processor.
5. a kind of bilateral grounding type on-line testing method for switching devices characterized by comprising movement will be connected with and driven
The tested switchgear two sides binding post of dynamic device is grounded respectively；In tested switchgear two sides parallel connection constant-current source, and measure switch
First electric current in equipment circuit；The second electricity of switchgear two sides earth-continuity is calculated by the electric current of constant-current source and the first electric current
Stream；The end time that making process in tested switchgear mechanical characteristic test is judged by the appearance of the first electric current, by the
The disappearance of one electric current judges the end time of separating brake process in tested switchgear mechanical characteristic test；It is calculated by the first electric current
The loop resistance of equipment under test；The earth-continuity for the grounding point connecting with tested switchgear is calculated by the second electric current.
6. bilateral grounding type on-line testing method for switching devices according to claim 5, it is characterised in that: by such as
Lower step uses system described in claim 4:
A) when tested switchgear implements power down, the binding post of its two sides is passed through to ground line and two ground connection respectively
Weld stake connection；
B) output end of constant-current source stake is welded with the ground connection respectively by connecting cable to connect；
C) starting operation driver is tested switchgear separating brake, enables host control constant-current source stablize the first electric current of output, and obtain
Tested switchgear two sides first voltage is led using the ground connection that the first electric current and first voltage obtain tested switchgear two sides
It is logical；
D) it enables the tested switch of drive control device control close a floodgate, its machinery is judged according to the time that tested switchgear electric current occurs
Characteristic closing time index, while record is electric by the second electric current and second for being tested switchgear circuit after the completion of combined floodgate
Pressure obtains the loop resistance of tested switch using the second electric current and second voltage；
E) the tested switch separating brake of drive control device control is enabled, its machinery is judged according to the time of tested switchgear current vanishes
Characteristic opening time index.
7. bilateral grounding type on-line testing method for switching devices according to claim 6, it is characterised in that: described
Tested switchgear is threephase switch equipment, and when ground connection, the tested every side three-phase binding post of switchgear is connected to the same ground connection
Point.
8. bilateral grounding type on-line testing method for switching devices according to claim 6, it is characterised in that: described
Constant-current source is industrial frequency AC constant-current source.
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| CN113253105A (en) * | 2021-04-02 | 2021-08-13 | 深圳供电局有限公司 | High-voltage switch action characteristic measuring system |
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