CN105571795B - A kind of GIS principal faults diagnostic system and method - Google Patents
A kind of GIS principal faults diagnostic system and method Download PDFInfo
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- CN105571795B CN105571795B CN201610146213.4A CN201610146213A CN105571795B CN 105571795 B CN105571795 B CN 105571795B CN 201610146213 A CN201610146213 A CN 201610146213A CN 105571795 B CN105571795 B CN 105571795B
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- 238000000034 method Methods 0.000 title abstract description 6
- 238000002405 diagnostic procedure Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 13
- 230000003750 conditioning effect Effects 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 2
- 238000012631 diagnostic technique Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of GIS principal faults diagnostic system and methods, system includes temperature sensor, baroceptor, distribution capacity measurement module, signal conditioning circuit, AD samplers, controller and alarm module, temperature sensor, baroceptor and distribution capacity measurement module acquire ambient temperature signal respectively, distribution capacity signal in gas chamber between air pressure signal and gas chamber conducting rod and shell simultaneously sends signal conditioning circuit to, AD sampler samples pass through the signal of signal condition and send controller to, controller according to the signal received judge GIS gas chambers whether gas leakage, and alarm module work is controlled according to judging result.The present invention overcomes defects existing for existing GIS gas chambers principal fault diagnostic techniques, eliminate the interference that environment temperature diagnoses GIS gas chamber principal faults.
Description
Technical field
The invention belongs to intelligent substation technical fields, more particularly to a kind of GIS principal faults diagnostic system and method.
Background technology
Gas insulated combined electrical equipment (Gas Insulated Switchgear, abbreviation GIS) is various electricity in electric substation
All combination is assemblied in a closed metal shell gas equipment in addition to transformer, the SF filled with certain pressure intensity in GIS gas chambers6
Gas, to realize reliable insulation of the conductor between shell, alternate and fracture.Thus GIS has compact-sized, operational reliability
The advantages that high and easy for installation.
GIS gas chambers are generally equipped with gas pressure sensor, and when there is gas leakage, GIS gas chamber pressure reduces, ordinary circumstance
Under can differentiate principal fault.But according to the equation of gas state, lead to the gas chamber SF of certain volume6Pressure change factor
In also have temperature in addition to gas leakage.In addition GIS conducting rods and shell are coaxial configuration, there is distribution capacity therebetween, and be electrolysed
Matter is SF6Gas, if gas chamber gas leakage SF6Air pressure reduces, SF6Dielectric constant change, therefore can be based on the variation of distribution capacity
Realize the monitoring of gas chamber principal fault.The dielectric constant of actually gas is not only related with pressure, and temperature is also to influence its dielectric
The important factor of constant.
In reality, the temperature difference of various quarters is very big in 1 year, and especially individual intraday temperature changes in area are very big, this will
Influence the accuracy and sensitivity of the monitoring of GIS gas chamber gas leakage.A kind of GIS gas chamber gas leakage for eliminating temperature change is needed thus
Fault detection method.
Invention content
In order to solve the technical issues of above-mentioned background technology proposes, the present invention is intended to provide a kind of GIS principal faults diagnose
System and method overcomes defect existing for existing GIS gas chambers principal fault diagnostic techniques, eliminates environment temperature and is leaked to GIS gas chambers
The interference of gas fault diagnosis.
In order to achieve the above technical purposes, the technical scheme is that：
A kind of GIS principal faults diagnostic system, including temperature sensor, baroceptor, distribution capacity measurement module, letter
Number modulate circuit, AD samplers, controller and alarm module, the baroceptor and the setting of distribution capacity measurement module exist
In GIS gas chambers, temperature sensor, baroceptor, distribution capacity measurement module output end respectively with signal conditioning circuit
Input terminal is connected, and the output end of the input terminal connection signal modulate circuit of AD samplers, controller is separately connected AD samplers
Output end and alarm module；The temperature sensor, baroceptor and distribution capacity measurement module acquire environment temperature respectively
Distribution capacity signal in signal, gas chamber between air pressure signal and gas chamber conducting rod and shell simultaneously sends signal condition electricity to
Road, AD sampler samples pass through the signal of signal condition and send controller to, and controller judges GIS according to the signal received
Gas chamber whether gas leakage, and according to judging result control alarm module work.
Further, the signal conditioning circuit includes amplifying circuit and filter circuit, the input terminal connection of amplifying circuit
The output end of the output end of temperature sensor, baroceptor and distribution capacity measurement module, amplifying circuit connects filter circuit
Input terminal, filter circuit output end connection AD samplers input terminal.
Further, the alarm module includes the LED and buzzer being connected respectively with controller.
Further, the controller uses arm processor.
The invention also includes a kind of GIS principal faults diagnostic methods, include the following steps：
(1) room temperature t is measured0The pressure P of lower GIS gas chambers0And the distribution capacity C between gas chamber conducting rod and shell0Number
Value, and preserve；
(2) distribution capacity between the pressure P of GIS gas chambers under current time temperature t and gas chamber conducting rod and shell is measured
C；
(3) theoretical value of gas chamber pressure is calculated：P0×t/t0, calculate the distribution capacity between gas chamber conducting rod and shell
Theoretical value：kc×C0, wherein coefficient kcFor：
In formula (1), k is this graceful constant of bohr, k=1.38 × 10-23J/K, α are SF in GIS gas chambers6Gas molecule radius；
(4) if P-P0×t/t0<0, and C-kc×C0<0, then judge gas chamber gas leakage；If P-P0×t/t0=0, and C-kc×C0
=0, then judge the non-gas leakage of gas chamber.
The advantageous effect brought using above-mentioned technical proposal：
The present invention is according to temperature to gas chamber SF6The influence of gas pressure intensity and dielectric constant, testing temperature lower chamber when calculating
Then the corresponding pressure and distribution capacity of non-failure are compared with the gas chamber pressure and distributed capacitance of actual measurement, realize gas chamber
Principal fault differentiates.The influence that temperature change identifies gas chamber principal fault when the present invention can eliminate GIS operations has pressure and divides
Two characteristic quantities of cloth capacitance, improve the accuracy of fault distinguishing.
Description of the drawings
Fig. 1 is the block diagram of system of the present invention；
Fig. 2 is flow chart of the method for the present invention.
Specific implementation mode
Below with reference to attached drawing, technical scheme of the present invention is described in detail.
The block diagram of system of the present invention as shown in Figure 1, a kind of GIS principal faults diagnostic system, including temperature sensor,
Baroceptor, distribution capacity measurement module, signal conditioning circuit, AD samplers, controller and alarm module, the air pressure transmission
Sensor and distribution capacity measurement module are arranged in GIS gas chambers, temperature sensor, baroceptor, distribution capacity measurement module
Output end be connected respectively with the input terminal of signal conditioning circuit, the output of the input terminal connection signal modulate circuit of AD samplers
End, controller are separately connected the output end and alarm module of AD samplers；The temperature sensor, baroceptor and distribution electricity
Hold measurement module and acquires ambient temperature signal, the distribution electricity in gas chamber between air pressure signal and gas chamber conducting rod and shell respectively
Hold signal and send signal conditioning circuit to, AD sampler samples pass through the signal of signal condition and send controller to, control
Device according to the signal received judge GIS gas chambers whether gas leakage, and according to judging result control alarm module work.
In the present embodiment, signal conditioning circuit includes amplifying circuit and filter circuit, the input terminal connection of amplifying circuit
The output end of the output end of temperature sensor, baroceptor and distribution capacity measurement module, amplifying circuit connects filter circuit
Input terminal, filter circuit output end connection AD samplers input terminal.
In the present embodiment, alarm module includes the LED and buzzer being connected respectively with controller, when controller judges
When GIS gas chamber gas leakage, driving LED flickers, buzzer call.
In the present embodiment, the controller uses arm processor.
The invention also includes a kind of GIS principal faults diagnostic methods, as shown in Fig. 2, including the following steps：
(1) room temperature t is measured0The pressure P of lower GIS gas chambers0And the distribution capacity C between gas chamber conducting rod and shell0Number
Value, and preserve；
(2) distribution capacity between the pressure P of GIS gas chambers under current time temperature t and gas chamber conducting rod and shell is measured
C；
(3) theoretical value of gas chamber pressure is calculated：P0×t/t0, the reason of the distribution capacity between counting chamber conducting rod and shell
By value：kc×C0, wherein coefficient kcFor：
In formula (1), k is this graceful constant of bohr, k=1.38 × 10-23J/K, α are SF in GIS gas chambers6Gas molecule radius；
(4) if P-P0×t/t0<0, and C-kc×C0<0, then judge gas chamber gas leakage；If P-P0×t/t0=0, and C-kc×C0
=0, then judge the non-gas leakage of gas chamber.
Above example is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within.
Claims (1)
1. a kind of GIS principal faults diagnostic method, which is characterized in that include the following steps：
(1) room temperature t is measured0The pressure P of lower GIS gas chambers0And the distribution capacity C between gas chamber conducting rod and shell0Numerical value,
And it preserves；
(2) the distribution capacity C between the pressure P, gas chamber conducting rod and shell of GIS gas chambers under current time temperature t is measured；
(3) theoretical value of gas chamber pressure is calculated：P0×t/t0, calculate the theory of the distribution capacity between gas chamber conducting rod and shell
Value：kc×C0, wherein coefficient kcFor：
In formula (1), k is this graceful constant of bohr, k=1.38 × 10-23J/K, α are SF in GIS gas chambers6Gas molecule radius；
(4) if P-P0×t/t0<0, and C-kc×C0<0, then judge gas chamber gas leakage；If P-P0×t/t0=0, and C-kc×C0=0,
Then judge the non-gas leakage of gas chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610146213.4A CN105571795B (en) | 2016-03-15 | 2016-03-15 | A kind of GIS principal faults diagnostic system and method |
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| CN201610146213.4A CN105571795B (en) | 2016-03-15 | 2016-03-15 | A kind of GIS principal faults diagnostic system and method |
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| CN105571795B true CN105571795B (en) | 2018-07-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106908188A (en) * | 2017-05-03 | 2017-06-30 | 南京科瑞电力科技有限公司 | A kind of GIS air pressure inside supervising devices based on temperature sensor |
| CN107748039B (en) * | 2017-09-14 | 2020-05-19 | 国家电网公司 | GIS equipment gas leakage rapid uninterrupted quantitative detection method based on helium tracing |
| CN108287274B (en) * | 2017-12-18 | 2020-12-29 | 国网内蒙古东部电力有限公司检修分公司 | Fault detection positioning device and method for GIS heating device at low temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237238Y (en) * | 1995-04-08 | 1996-10-09 | 南征 | Intelligent SF6 gas density monitor |
| JP4495103B2 (en) * | 2006-03-27 | 2010-06-30 | 三菱電機株式会社 | Gas leak detection device and gas leak detection method |
| CN202562524U (en) * | 2012-05-03 | 2012-11-28 | 上海精鼎电力科技有限公司 | SF6 gas moisture pressure and density on-line monitoring device |
| CN104568323B (en) * | 2014-06-25 | 2017-10-31 | 贵州电力试验研究院 | A kind of SF6Gas leaks online monitoring alarm system |
| CN204758243U (en) * | 2015-06-16 | 2015-11-11 | 常州集贤科技有限公司 | Gaseous dew point of SF6 leaks tester |
| CN105301387B (en) * | 2015-10-09 | 2018-01-30 | 河海大学 | GIS air chamber media failure diagnostic systems and method based on dielectric loss monitoring |
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