CN104360299A - On-site wireless inspection device and method for capacitive type device on-line monitoring system - Google Patents
On-site wireless inspection device and method for capacitive type device on-line monitoring system Download PDFInfo
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- CN104360299A CN104360299A CN201410661982.9A CN201410661982A CN104360299A CN 104360299 A CN104360299 A CN 104360299A CN 201410661982 A CN201410661982 A CN 201410661982A CN 104360299 A CN104360299 A CN 104360299A
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Abstract
The invention relates to an on-site wireless inspection device and method for a capacitive type device on-line monitoring system. The on-site wireless inspection device and method for the capacitive type device on-line monitoring system comprises a host machine, a first on-site current signal generator and a second on-site current signal generator. According to the on-site wireless inspection device and method for the capacitive type device on-line monitoring system, the on-site current signal generators are controlled in a wireless communication mode to generate adjustable capacitance and the absolute value of a dielectric loss angle tangent value, the adjustable capacitance and the absolute value of the dielectric loss angle tangent value are input into the capacitive type device on-line monitoring system, so that the purpose of carrying out on-site inspection on the capacitive type device on-line monitoring system is achieved, and therefore the problem that effective on-site inspection cannot be carried out on the capacitive type device on-line monitoring system in the prior art is solved.
Description
Technical field
The present invention relates to power equipment state monitoring field, particularly relate to a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment and the method for inspection thereof.
Background technology
In recent years, along with proposition and the deep practice of the concept such as status monitoring, repair based on condition of component, capacitance type equipment on-line monitoring system obtains a large amount of application in each electrical network and electricity power enterprise.For Yunnan Power Grid Company, according to incompletely statistics, have 459 capacitance type equipments and installed capacitance type equipment on-line monitoring system, all in all quantity is not little.The capacitance type equipment on-line monitoring system that Yunnan Power Grid Company puts into operation has the earliest reached 13 years working time, and the capacitance type equipment on-line monitoring system being more than or equal to 10 years working time accounts for 24%, and all in all working time is not short.Along with the long-time running of a large amount of capacitance type equipment on-line monitoring system, the problem come out also increases gradually.Therefore on-the-spot periodic inspection is carried out to the capacitance type equipment on-line monitoring system in fortune, ensure that capacitance type equipment on-line monitoring system health is run, become the key subjects that each electrical network and electricity power enterprise's status monitoring, repair based on condition of component executive arm face.
At present, existing capacitance type equipment on-line monitoring system verifying attachment and method mainly contain 2 kinds:
1) standard signal generating means is adopted to produce adjustable electric capacity and dielectric loss angle tangent absolute value, and by cable input capacitance type equipment on-line monitoring system, to reach the object of testing to capacitance type equipment on-line monitoring system;
2) precise relative measurement instrument is adopted to measure capacitance type equipment electric capacity and dielectric loss angle tangent relative value, the electric capacity recorded with capacitance type equipment on-line monitoring system and dielectric loss angle tangent absolute value contrast, to reach the object of testing to capacitance type equipment on-line monitoring system.
The 1st kind of method of inspection is generally applied to laboratory inspection, is difficult to be applied to field test.This is mainly limited to the limited carrying load ability of standard signal generating means, therefore the cable length being connected to signal generator can not be long.According to laboratory applications experience, the cable length being connected to signal generator generally can not be greater than 10m.But, at the scene by adjustable electric capacity and dielectric loss angle tangent absolute value input capacitance type equipment on-line monitoring system, in general cable length can be very long, and according to rig-site utilization experience, the longest cable length may be close to 200m.
The 2nd kind of method of inspection is generally applied to field test.But, by the thinking of relative value inspection absolute value, inherently there is great problem.Therefore this method is not the method for a kind of rational capacitance type equipment on-line monitoring system field test.
In sum, field test is carried out to capacitance type equipment on-line monitoring system and is significant, but existing technical method and device can not carry out effective field test to capacitance type equipment.
Summary of the invention
The object of the invention is the problem for prior art, propose a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment and the method for inspection thereof.The present invention produces adjustable electric capacity and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system by using wireless communication mode to control current signal generator on the spot, to reach the object of capacitance type equipment on-line monitoring system being carried out to field test, thus solve the problem cannot carrying out effective field test in prior art to capacitance type equipment on-line monitoring system.
For achieving the above object, the present invention proposes a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment and the method for inspection thereof, the present invention is characterised in that: a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment, comprising: main frame, #1 be current signal generator, #2 current signal generator on the spot on the spot.
#1 of the present invention on the spot current signal generator and #2 on the spot current signal generator send current signal, and respectively input capacitance type equipment end shield current sensor punching line and voltage transformer secondary current sensor punching line.
Main frame of the present invention is with wireless communication mode control #1 current signal generator and the #2 effective value of current signal that sends of current signal generator and phase differential on the spot on the spot, electric capacity and the dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system is changed with this, by calculating measuring error between the electric capacity of electric capacity that capacitance type equipment on-line monitoring system records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system and dielectric loss angle tangent absolute value whether in specialized range, reach the object that capacitance type equipment on-line monitoring system is tested.
The transmission range of wireless communication mode of the present invention is not less than 200m.
The electric capacity absolute value of input capacitance type equipment on-line monitoring system of the present invention is adjustable, and range of adjustment is not less than 100pF ~ 50000pF.
The dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system of the present invention is adjustable, and range of adjustment is not less than 0.1% ~ 30%.
The specialized range of the measuring error between the electric capacity of the electric capacity that capacitance type equipment on-line monitoring system of the present invention records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system and dielectric loss angle tangent absolute value comprises: electric capacity measuring error≤± (reading of standard × 1%), dielectric loss angle tangent measuring error≤± (reading of standard × 1%+0.1%).
A kind of capacitance type equipment on-line monitoring system on-site wireless method of inspection of the present invention, step is:
1) one group of shorting stub short circuit capacitance type equipment end shield downlead is used;
2) connection between capacitance type equipment end shield downlead and capacitance type equipment end shield current sensor punching line is disconnected;
3) output of #1 current signal generator is on the spot connected to capacitance type equipment end shield current sensor punching line two ends;
4) terminated line after another group shorting stub short circuit voltage transformer (VT) protective resistance is used;
5) connection after off voltage mutual inductor protective resistance between terminated line and voltage transformer secondary current sensor punching line;
6) output of #2 current signal generator is on the spot connected to voltage transformer secondary current sensor punching line two ends;
7) #1 on the spot current signal generator and #2 on the spot current signal generator send current signal, and respectively input capacitance type equipment end shield current sensor punching line and voltage transformer secondary current sensor punching line;
8) main frame is with wireless communication mode control #1 current signal generator and the #2 effective value of current signal that sends of current signal generator and phase differential on the spot on the spot, changes electric capacity and the dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system with this;
9) by calculating measuring error between the electric capacity of electric capacity that capacitance type equipment on-line monitoring system records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system and dielectric loss angle tangent absolute value whether in specialized range, the object that capacitance type equipment on-line monitoring system is tested is reached.
The invention has the beneficial effects as follows: solve the problem cannot carrying out effective field test in prior art to capacitance type equipment on-line monitoring system.
Accompanying drawing explanation
Fig. 1 is a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment and method of inspection schematic diagram thereof.
Label in Fig. 1: 1, main frame; 2, #1 current signal generator on the spot; 3, #2 current signal generator on the spot; 4, capacitance type equipment on-line monitoring system; 5, capacitance type equipment end shield current sensor; 6, voltage transformer secondary current sensor; 7, capacitance type equipment end shield current sensor punching line; 8, voltage transformer secondary current sensor punching line; 9, capacitance type equipment; 10, capacitance type equipment end shield downlead; 11, one group of shorting stub; 12, voltage transformer (VT); 13, protective resistance; 14, terminated line after voltage transformer (VT) protective resistance; 15, another group shorting stub; 16, high-voltage conducting wires.
Embodiment
Below with reference to the drawings and specific embodiments, technical scheme of the present invention is described in further detail.
A kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment, the present invention is characterised in that: comprising: main frame 1, #1 be current signal generator 2, #2 current signal generator 3 on the spot on the spot.
Described #1 on the spot current signal generator 2 and #2 on the spot current signal generator 3 send current signal, and respectively input capacitance type equipment end shield current sensor punching line 7 and voltage transformer secondary current sensor punching line 8.
Described main frame 1 is with wireless communication mode control #1 current signal generator 2 and the #2 effective value of current signal that sends of current signal generator 3 and phase differential on the spot on the spot, electric capacity and the dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system 4 is changed with this, by calculating measuring error between the electric capacity of electric capacity that capacitance type equipment on-line monitoring system 4 records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system 4 and dielectric loss angle tangent absolute value whether in specialized range, reach the object that capacitance type equipment on-line monitoring system 4 is tested.
The transmission range of described wireless communication mode is not less than 200m.
The electric capacity absolute value of described input capacitance type equipment on-line monitoring system 4 is adjustable, and range of adjustment is not less than 100pF ~ 50000pF.
The dielectric loss angle tangent absolute value of described input capacitance type equipment on-line monitoring 4 system is adjustable, and range of adjustment is not less than 0.1% ~ 30%.
The specialized range of the measuring error between the electric capacity of the electric capacity that described capacitance type equipment on-line monitoring system 4 records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system 4 and dielectric loss angle tangent absolute value comprises: electric capacity measuring error≤± (reading of standard × 1%), dielectric loss angle tangent measuring error≤± (reading of standard × 1%+0.1%).
A method of inspection for capacitance type equipment on-line monitoring system on-site wireless verifying attachment, its step is:
1) one group of shorting stub 11 short circuit capacitance type equipment end shield downlead 10 is used;
2) connection between capacitance type equipment end shield downlead 10 and capacitance type equipment end shield current sensor punching line 7 is disconnected;
3) output of #1 current signal generator 2 is on the spot connected to capacitance type equipment end shield current sensor punching line 7 two ends;
4) terminated line 14 after another group shorting stub 15 short circuit voltage transformer (VT) protective resistance is used;
5) connection after off voltage mutual inductor protective resistance between terminated line 14 and voltage transformer secondary current sensor punching line 8;
6) output of #2 current signal generator 3 is on the spot connected to voltage transformer secondary current sensor punching line 8 two ends;
7) #1 on the spot current signal generator 2 and #2 on the spot current signal generator 3 send current signal, and respectively input capacitance type equipment end shield current sensor punching line 7 and voltage transformer secondary current sensor punching line 8;
8) main frame 1 is with wireless communication mode control #1 current signal generator 2 and the #2 effective value of current signal that sends of current signal generator 3 and phase differential on the spot on the spot, changes electric capacity and the dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system 4 with this;
9) by calculating measuring error between the electric capacity of electric capacity that capacitance type equipment on-line monitoring system 4 records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system 4 and dielectric loss angle tangent absolute value whether in specialized range, the object that capacitance type equipment on-line monitoring system 4 is tested is reached.
Claims (6)
1. a capacitance type equipment on-line monitoring system on-site wireless verifying attachment, is characterized in that: comprising: main frame, #1 be current signal generator, #2 current signal generator on the spot on the spot;
Described #1 on the spot current signal generator and #2 on the spot current signal generator send current signal, and respectively input capacitance type equipment end shield current sensor punching line and voltage transformer secondary current sensor punching line;
Described main frame, with wireless communication mode control #1 current signal generator and the #2 effective value of current signal that sends of current signal generator and phase differential on the spot on the spot, changes electric capacity and the dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system with this.
2., by a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment according to claim 1, it is characterized in that: the transmission range of described wireless communication mode is not less than 200m.
3., by a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment according to claim 1, it is characterized in that: the electric capacity absolute value of described input capacitance type equipment on-line monitoring system is adjustable, and range of adjustment is not less than 100pF ~ 50000pF.
4., by a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment according to claim 1, it is characterized in that: the dielectric loss angle tangent absolute value of described input capacitance type equipment on-line monitoring system is adjustable, and range of adjustment is not less than 0.1% ~ 30%.
5. by a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment according to claim 1, it is characterized in that: the specialized range of the measuring error between the electric capacity of the electric capacity that described capacitance type equipment on-line monitoring system records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system and dielectric loss angle tangent absolute value comprises: electric capacity measuring error≤± (reading of standard × 1%), dielectric loss angle tangent measuring error≤± (reading of standard × 1%+0.1%).
6. the method for inspection of a kind of capacitance type equipment on-line monitoring system on-site wireless verifying attachment according to claim 1 or 2 or 3 or 4 or 5, is characterized in that: step is:
1) one group of shorting stub short circuit capacitance type equipment end shield downlead is used;
2) connection between capacitance type equipment end shield downlead and capacitance type equipment end shield current sensor punching line is disconnected;
3) output of #1 current signal generator is on the spot connected to capacitance type equipment end shield current sensor punching line two ends;
4) terminated line after another group shorting stub short circuit voltage transformer (VT) protective resistance is used;
5) connection after off voltage mutual inductor protective resistance between terminated line and voltage transformer secondary current sensor punching line;
6) output of #2 current signal generator is on the spot connected to voltage transformer secondary current sensor punching line two ends;
7) #1 on the spot current signal generator and #2 on the spot current signal generator send current signal, and respectively input capacitance type equipment end shield current sensor punching line and voltage transformer secondary current sensor punching line;
8) main frame is with wireless communication mode control #1 current signal generator and the #2 effective value of current signal that sends of current signal generator and phase differential on the spot on the spot, changes electric capacity and the dielectric loss angle tangent absolute value of input capacitance type equipment on-line monitoring system with this;
9) by calculating measuring error between the electric capacity of electric capacity that capacitance type equipment on-line monitoring system records and dielectric loss angle tangent absolute value and input capacitance type equipment on-line monitoring system and dielectric loss angle tangent absolute value whether in specialized range, the object that capacitance type equipment on-line monitoring system is tested is reached.
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| CN201410661982.9A CN104360299A (en) | 2014-11-19 | 2014-11-19 | On-site wireless inspection device and method for capacitive type device on-line monitoring system |
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Cited By (3)
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| CN105203981A (en) * | 2015-10-23 | 2015-12-30 | 国家电网公司 | Field inspection device and method of grounding current on-line monitoring equipment for transformer core |
| CN105242228A (en) * | 2015-10-23 | 2016-01-13 | 国家电网公司 | Current blanking method and device of transformer iron core grounding current online monitoring equipment |
| CN106443546A (en) * | 2016-10-19 | 2017-02-22 | 中国计量大学 | Wireless calibration method and system for capacitive equipment insulation performance online monitoring device |
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