CN107328518A - GIS device SF6 on-line monitoring systems and its method of work - Google Patents
GIS device SF6 on-line monitoring systems and its method of work Download PDFInfo
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- CN107328518A CN107328518A CN201710571439.3A CN201710571439A CN107328518A CN 107328518 A CN107328518 A CN 107328518A CN 201710571439 A CN201710571439 A CN 201710571439A CN 107328518 A CN107328518 A CN 107328518A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
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Abstract
GIS device SF6 on-line monitoring systems and its method of work, are related to a kind of monitoring field.At present, GIS device SF6 on-line monitoring systems, often occur error in data and inaccurate situation.The present invention includes：Artificial copy data input module；Pressure acquisition module；Temperature collect module；Atmospheric pressure monitoring modular；Data resolution module；Data preprocessing module, is compensated to absolute pressure, and online monitoring data is modified；Pressure monitoring analysis module, for carrying out analysis judgement to the data after data prediction resume module；Off-limit alarm module, when pressure monitoring analysis module judges more to prescribe a time limit, carries out off-limit alarm；Data memory module.The technical program enters trip temperature and barometric pressure compensation to SF6 pressure；And artificial copy data is combined, online monitoring data is modified, the accuracy of data is effectively improved.
Description
Technical field
The present invention relates to a kind of monitoring field, more particularly to GIS device SF6 on-line monitoring systems and its method of work.
Background technology
Main on-line monitoring equipment has the oil chromatography, iron core, clamp earthing current of transformer (height is anti-) online in transformer station
Monitoring, transformer, GIS device partial discharge on-line monitoring, breaker and GIS device SF6Pressure on-line monitoring etc.[1].As GIS is set
Standby application, SF6Pressure on-line monitoring application of function is also more and more.Especially in ultra-high voltage transformer station, due to its Large Copacity,
At a distance, trans-regional conveying electric energy, a large amount of to use voltage levels GIS electrical equipments, its SF6 gas pressure will be direct with performance
Influence extra-high voltage electrical equipment safety.
Currently, transformer station SF6 on-Line Monitor Devices by gathered data generally using monitoring system is uploaded, by monitoring system profit
It has been shown that, and be compared with the alarming value of setting with the data collected, when pressure be less than the alarming value alarm, namely
SF can only be realized6Pressure is shown and off-limit alarm.Which does not carry out fully handling and excavating to the data collected so that one
The slow development of a little more hidden defects or defect can not be found in time.As worked as certain ultra-high voltage transformer station some air chamber of GIS SF6Gas
Body pressure is on a declining curve always, but is due to that decrease speed is very slow, and after the leakage by some months, its pressure value is still
More than rated pressure, therefore monitoring system never has alarm.Above mentioned problem influences high voltage electric equipment safety problem, suddenly waits to change
Enter.
The pressure data that on-line monitoring sensor probe is collected is relative pressure, does not account for the change of atmospheric pressure.Have
A little sensors do not account for temperature factor yet, and the data collected can have larger fluctuation with the change of temperature.In addition, online
The problems such as monitoring system is due to probe, often occurs error in data phenomenon, causes data inaccurate.
The content of the invention
The technical problem to be solved in the present invention and propose technical assignment be prior art to be improved with being improved,
GIS device SF6 on-line monitoring systems and its method of work are provided, to reach the purpose for improving high voltage electric equipment security.For
This, the present invention takes following technical scheme.
GIS device SF6 on-line monitoring systems, it is characterised in that including：
Artificial copy data input module：Input for artificial copy data；
Pressure acquisition module, the pressure for gathering each air chamber in transformer station's GIS device；
Temperature collect module, for gathering the temperature in each or multiple air chambers；
Atmospheric pressure monitoring modular, for gathering atmospheric pressure；
Data resolution module, for the information obtained to pressure acquisition module, temperature collect module, atmospheric pressure monitoring modular
Data parsing is carried out, corresponding air chamber pressure, temperature and atmospheric pressure is obtained；
Data preprocessing module, obtains absolute pressure, according to the corresponding temperature in air chamber according to air chamber pressure, atmospheric pressure
Absolute pressure is compensated；And artificial copy data is combined, online monitoring data is modified；
Pressure monitoring analysis module, for carrying out analysis judgement to the data after data prediction resume module；It includes
The out-of-limit judging submodule of pressure for the out-of-limit judgement of pressure, for adjacent air cells pressure ratio compared with adjacent air cells pressure ratio it is more sub
Module, for not in the same time pressure ratio compared with pressure ratio is not initial compared with submodule, for what is compared with initial pressure value in the same time
Pressure comparison sub-module, the pressure jump judging submodule judged for pressure jump, adjacent air cells pressure ratio are relatively used to reflect
Leakage and its leakiness and speed between adjacent air cells；Comparison with initial pressure value is used for the automatic generation SF6 that quotes and let out
The air chamber of leakage, the pressure data of on-line monitoring is carried out mathematic interpolation with the corresponding air chamber pressure initial value stored, works as difference by it
During more than thresholding, quote automatically；Not in the same time pressure ratio compared with and pressure jump judge, for reflecting same air chamber not in the same time
Air chamber pressure, calculates each air chamber SF6 slips, it is calculated by second order algorithm；Adjacent air cells pressure ratio is calculated compared with by second order
Method is calculated；
Off-limit alarm module, when pressure monitoring analysis module judges more to prescribe a time limit, carries out off-limit alarm；
Data memory module, the data memory module for data storage.
The technical program is monitored to the air pressure of each air chamber, and sets up adjacent air cells pressure comparison module, adjacent two
Air chamber carry out pressure ratio compared with, when 2 air chambers pressure difference occur more prescribe a time limit, can alarm, the gas leakage situation of single air chamber is found in time,
Improve the security of transformer station's GIS device work, reliable operation.Analysis is compared using various ways, multi-angle is carried out
Monitoring, can note abnormalities, so as to ensure the stability of its operating pressure in time.
The technical program enters trip temperature and barometric pressure compensation to SF6 pressure；And artificial copy data is combined, to on-line monitoring
Data are modified.Effectively improve the accuracy of data.
As further improving and supplementing to above-mentioned technical proposal, present invention additionally comprises following additional technical feature.
Further, described data preprocessing module is when calculating absolute pressure, using formula：P=0.098 ×
(0.58×10-3γT(1+B)-γ2A)；
A=0.764 × 10-3(1-0.727×10-3γ)；
B=2.51 × 10-3γ(1-0.846×10-3γ)；
Wherein：P：Absolute pressure value, unit：Mpa；
γ：Gas density, unit：kg/m3；
T：Absolute temperature, unit K；
And the temperature coefficient of gas pressure is obtained by above formula：
K=0.098 × (0.58 × 10-3γ (1+B)), unit：Mpa/℃.
Gas density is according to gas density during first dress, or according to pressure and temperature by obtained by above formula Extrapolation；
In operation, calculated by formula and obtain pressure-temperature coefficient k values, with reference to actual temperature value, by the unified conversion of gas pressure to 20 DEG C
At a temperature of pressure, then carry out the comparative analysis of packing pressure, to eliminate temperature factor, make to be accurately calculated.
Further, on-line monitoring system also include display module, after the completion of analysis, display module be used for generate form and
Curve, to carry out SF6 leakage trend anticipations to the analysis of data.
Further, described pressure acquisition module includes multiple SF6 pressure monitors, and each air chamber of GIS device is equal
Provided with a SF6 pressure monitors to gather the pressure value of each air chamber.
Further, when transformer station's GIS device is 1000KV GIS devices, each 1000kV GIS breaker units are matched somebody with somebody
1 terminal box is put, for accessing all SF6 pressure monitors of this breaker unit.
Further, described terminal box is located in a SF6 on-line monitoring system cabinets, the access of SF6 on-line monitoring systems cabinet
1000kV GIS status monitoring informations, described SF6 on-line monitoring systems cabinet, which is provided with, to be used to believe 1000kV GIS status monitorings
Breath is uploaded to the communication module of integrated monitoring system.
Further, when transformer station's GIS device is 500kV GIS devices, each 500kV GIS breaker units configuration
1 SF6 monitors sub- IED, while 1 500kV SF6 of configuration monitors main IED on-line, 500kV SF6 monitor main IED and SF6 on-line
Monitor sub- IED and be connected and integrated monitoring system is uploaded to after status monitoring information for converging.
Further, GIS device SF6 on-line monitoring systems are in II area's independence networking, and information data uses DL/T860 (IEC
61850) agreement access integrated application server, IIth area communication network shutdown is logical using DL/T634.5104 stipulations and scheduling at different levels
Letter, transmission on-line monitoring information.
It is a further object to provide a kind of on-line monitoring method of GIS device SF6 on-line monitoring systems, it is wrapped
Include following steps：
1) SF6 density meters data are manually made a copy of, and will manually copy by artificial copy data step at regular intervals
The SF6 density meters data of record pass through artificial copy data input module import system；
2) pressure of each air chamber in pressure acquisition step, SF6 pressure monitors collection transformer station GIS device；
3) temperature acquisition step, the collection of trip temperature during to each air chamber or several air chambers therein；
4) atmospheric pressure monitoring modular, gathers Real-Time Atmospheric pressure；
5) data analyzing step, to the information obtained to pressure acquisition module, temperature collect module, atmospheric pressure monitoring modular
Data parsing is carried out, corresponding air chamber pressure, temperature and atmospheric pressure is obtained；
6) data prediction step, absolute pressure is obtained according to air chamber pressure, atmospheric pressure, according to the correspondence temperature in air chamber
Degree is compensated to absolute pressure；The difference between artificial copy data and online monitoring data is calculated, when artificial copy data
When difference between online monitoring data is more than threshold value, it is confirmed whether that on-line monitoring probe breaks down, and manually to make a copy of
Data substitute online monitoring data, and online monitoring data is modified,；
7) data after data prediction resume module are carried out analysis judgement by pressure monitoring analytical procedure；Including pressure
It is out-of-limit judge, adjacent air cells pressure ratio compared with, not in the same time pressure ratio compared with, compared with initial pressure value, pressure jump judgement, it is adjacent
Air chamber pressure compares for reflecting leakage and its leakiness and speed between adjacent air cells；Comparison with initial pressure value is used
In quote automatically occur SF6 leakage air chamber, its by the pressure data of on-line monitoring with storage corresponding air chamber pressure initial value
Mathematic interpolation is carried out, when difference exceedes thresholding, is quoted automatically；Not in the same time pressure ratio compared with and pressure jump judge, for anti-
The air chamber pressure of same air chamber not in the same time is reflected, each air chamber SF6 slips are calculated, it is calculated by second order algorithm；Adjacent gas
Chamber pressure compares to be calculated by second order algorithm；
8) off-limit alarm step, when judging more to prescribe a time limit, carries out off-limit alarm；
9) data storage, stores pressure data, and pressure data includes initial pressure value, historical pressures value；
10) step is shown, form and curve are generated according to pressure value, it is pre- to carry out SF6 leakages trend to the analysis of data
Sentence.
Further, in step 6) in data prediction step, including：
A) absolute pressure of data preprocessing module is calculated, and absolute pressure calculates and uses formula：P=0.098 × (0.58 ×
10-3γT(1+B)-γ2A)；
A=0.764 × 10-3(1-0.727×10-3γ)；
B=2.51 × 10-3γ(1-0.846×10-3γ)；
Wherein：P：Absolute pressure value, unit：Mpa；
γ：Gas density, unit：kg/m3；
T：Absolute temperature, unit K；
And the temperature coefficient of gas pressure is obtained by above formula：
K=0.098 × (0.58 × 10-3γ (1+B)), unit：Mpa/℃；
Gas density is according to gas density during first dress, or according to pressure and temperature by obtained by above formula Extrapolation；
In operation, calculated by formula and obtain pressure-temperature coefficient k values, with reference to actual temperature value, by the unified conversion of gas pressure to 20 DEG C
At a temperature of pressure, then carry out the comparative analysis of packing pressure, to eliminate temperature factor, make to be accurately calculated；
B) artificial pressure differential variable quantity between copy data and online monitoring data is calculated：Mathematic interpolation formula is：
P″AH=P 'AH2-P′AH1
Wherein：P′AH1=PA1-PH1
P′AH2=PA2-PH2
PA1：At the moment 1, monitor the air chamber pressure of collection on-line；
PH1：Moment 1, the air chamber pressure manually made a copy of；
PA2：At the moment 2, monitor the air chamber pressure of collection on-line；
PH2：Moment 2, the air chamber pressure manually made a copy of.
As P "AHWhen >=0.02, it is believed that online monitoring data is abnormal, and sending prompting needs manual confirmation.
Step 3) also include not pressure ratio in the same time and judge compared with, pressure jump, compared with initial pressure value；
Comparison with initial pressure value is used to quote the air chamber for occurring SF6 leakages automatically, and it is by the number pressure of on-line monitoring
Mathematic interpolation is carried out according to air chamber pressure initial value corresponding with storage, when difference exceedes thresholding, is quoted automatically；
Not in the same time pressure ratio compared with and pressure jump judge, for reflecting the air chamber pressure of same air chamber not in the same time, meter
Calculate each air chamber SF6 slips；
It is calculated by second order algorithm；
Adjacent air cells pressure ratio compared with, not in the same time pressure ratio compared with and pressure jump judge calculated by second order algorithm.
The technical program is compared analysis using various ways, and multi-angle is monitored, and can note abnormalities in time, from
And ensure the stability of its operating pressure.
Beneficial effect：
1st, the technical program realizes effective monitoring to each air chamber pressure, and analysis is monitored to pressure from multi-angle,
The minor variations of air chamber pressure are found in time, with regard to defect can be found before the more serious situations such as the low alarm of pressure occur for equipment,
Be conducive to advanced processing equipment safety hidden danger.
2nd, the technical program enters trip temperature and barometric pressure compensation to SF6 pressure；And artificial copy data is combined, to online prison
Survey data to be modified, exclude the influence of temperature and atmospheric pressure, effectively improve the accuracy of data.
Brief description of the drawings
Fig. 1 is the structure principle chart of the present invention.
Fig. 2 is the attachment structure block diagram of the present invention.
Fig. 3 is the flow chart of the present invention.
Embodiment
Technical scheme is described in further detail below in conjunction with Figure of description.
As shown in figure 1, GIS device SF6 on-line monitoring systems include：
Artificial copy data input module：Input for artificial copy data；
Pressure acquisition module, the pressure for gathering each air chamber in transformer station's GIS device；
Temperature collect module, for gathering the temperature in each or multiple air chambers；
Atmospheric pressure monitoring modular, for gathering atmospheric pressure；
Data resolution module, for the information obtained to pressure acquisition module, temperature collect module, atmospheric pressure monitoring modular
Data parsing is carried out, corresponding air chamber pressure, temperature and atmospheric pressure is obtained；
Data preprocessing module, obtains absolute pressure, according to the corresponding temperature in air chamber according to air chamber pressure, atmospheric pressure
Absolute pressure is compensated；And artificial copy data is combined, online monitoring data is modified；
Pressure monitoring analysis module, for carrying out analysis judgement to the data after data prediction resume module；It includes
The out-of-limit judging submodule of pressure for the out-of-limit judgement of pressure, for adjacent air cells pressure ratio compared with adjacent air cells pressure ratio it is more sub
Module, for not in the same time pressure ratio compared with pressure ratio is not initial compared with submodule, for what is compared with initial pressure value in the same time
Pressure comparison sub-module, the pressure jump judging submodule judged for pressure jump, adjacent air cells pressure ratio are relatively used to reflect
Leakage and its leakiness and speed between adjacent air cells；Comparison with initial pressure value is used for the automatic generation SF6 that quotes and let out
The air chamber of leakage, the pressure data of on-line monitoring is carried out mathematic interpolation with the corresponding air chamber pressure initial value stored, works as difference by it
During more than thresholding, quote automatically；Not in the same time pressure ratio compared with and pressure jump judge, for reflecting same air chamber not in the same time
Air chamber pressure, calculates each air chamber SF6 slips, it is calculated by second order algorithm；Adjacent air cells pressure ratio is calculated compared with by second order
Method is calculated；
Off-limit alarm module, when pressure monitoring analysis module judges more to prescribe a time limit, carries out off-limit alarm；
Data memory module, the data memory module for data storage.
The technical program realizes effective monitoring to each air chamber pressure, and analysis is monitored to pressure from multi-angle, and
The minor variations of Shi Faxian air chamber pressures, with regard to that can find defect before the more serious situations such as the low alarm of pressure occur for equipment, have
Beneficial to advanced processing equipment safety hidden danger.
The technical program enters trip temperature and barometric pressure compensation to SF6 pressure；And artificial copy data is combined, to on-line monitoring
Data are modified.Effectively improve the accuracy of data.Some problems existed before are overcome, such as：" on-line monitoring sensor
The pressure data collected of popping one's head in is relative pressure, does not account for the change of atmospheric pressure.Some sensors do not account for temperature yet
Factor, the data collected can have larger fluctuation with the change of temperature.Meanwhile, on-line monitoring system is asked due to probe etc.
Topic, often occurs error in data phenomenon.”
As shown in Fig. 2 accuracy, reliability to improve monitoring, described pressure acquisition module include multiple SF6 pressure
Monitor, each air chamber of GIS device is equipped with a SF6 pressure monitors to gather the pressure value of each air chamber.
When transformer station's GIS device is 1000KV GIS devices, each 1000kV GIS breaker units configure 1 wiring
Box, for accessing all SF6 pressure monitors of this breaker unit.Described terminal box is located at a SF6 on-line monitoring system cabinets
In, SF6 on-line monitoring systems cabinet access 1000kV GIS status monitoring informations, described SF6 on-line monitoring systems cabinet is provided with use
In the communication module that 1000kV GIS status monitoring informations are uploaded to integrated monitoring system.
When transformer station's GIS device is 500kV GIS devices, each 500kV GIS breaker units configure 1 SF6 prison
Sub- IED is surveyed, while 1 500kV SF6 of configuration monitors main IED on-line, 500kV SF6 monitor main IED and SF6 on-line and monitor son
IED is connected is uploaded to integrated monitoring system for converging after status monitoring information.
To improve the security of data, GIS device SF6 on-line monitoring systems are used in II area's independence networking, information data
DL/T860 (IEC 61850) agreement accesses integrated application server, II area communication network shutdown using DL/T634.5104 stipulations with
Dispatching communications at different levels, transmission on-line monitoring information.
As shown in figure 3, the on-line monitoring method of the present invention, it comprises the following steps：
1) SF6 density meters data are manually made a copy of, and will manually copy by artificial copy data step at regular intervals
The SF6 density meters data of record pass through artificial copy data input module import system；
2) pressure of each air chamber in pressure acquisition step, SF6 pressure monitors collection transformer station GIS device；
3) temperature acquisition step, the collection of trip temperature during to each air chamber or several air chambers therein；
4) atmospheric pressure monitoring modular, gathers Real-Time Atmospheric pressure；
5) data analyzing step, to the information obtained to pressure acquisition module, temperature collect module, atmospheric pressure monitoring modular
Data parsing is carried out, corresponding air chamber pressure, temperature and atmospheric pressure is obtained；
6) data prediction step, absolute pressure is obtained according to air chamber pressure, atmospheric pressure, according to the correspondence temperature in air chamber
Degree is compensated to absolute pressure；The difference between artificial copy data and online monitoring data is calculated, when artificial copy data
When difference between online monitoring data is more than threshold value, it is confirmed whether that on-line monitoring probe breaks down, and manually to make a copy of
Data substitute online monitoring data, and online monitoring data is modified；
It includes two main contents：(1) trip temperature and barometric pressure compensation are entered to SF6 pressure；(2) combine and manually make a copy of number
According to being modified to online monitoring data.
(1) temperature and barometric pressure compensation.The pressure that sensor is collected be relative pressure, do not account for atmospheric pressure because
Element；The pressure that some sensor probes are collected does not pass through temperature-compensating, it is also desirable to compensate.
(2) because the on-line monitoring frequent failure of sensor probe causes corrupt data, and field erected SF6 density meters work
Work is very stable seldom to go wrong.Therefore monthly will manually make a copy of the data import system of density meter twice, by compare analysis with
Correct the mistake of online monitoring data.After on-line monitoring probe failure is confirmed, on-line monitoring number is substituted with artificial copy data
According to.
7) data after data prediction resume module are carried out analysis judgement by pressure monitoring analytical procedure；Including pressure
It is out-of-limit judge, adjacent air cells pressure ratio compared with, not in the same time pressure ratio compared with, compared with initial pressure value, pressure jump judgement, it is adjacent
Air chamber pressure compares for reflecting leakage and its leakiness and speed between adjacent air cells；Comparison with initial pressure value is used
In quote automatically occur SF6 leakage air chamber, its by the pressure data of on-line monitoring with storage corresponding air chamber pressure initial value
Mathematic interpolation is carried out, when difference exceedes thresholding, is quoted automatically；Not in the same time pressure ratio compared with and pressure jump judge, for anti-
The air chamber pressure of same air chamber not in the same time is reflected, each air chamber SF6 slips are calculated, it is calculated by second order algorithm；Adjacent gas
Chamber pressure compares to be calculated by second order algorithm；
8) off-limit alarm step, when judging more to prescribe a time limit, carries out off-limit alarm；
9) data storage, stores pressure data, and pressure data includes initial pressure value, historical pressures value；
10) step is shown, form and curve are generated according to pressure value, it is pre- to carry out SF6 leakages trend to the analysis of data
Sentence.
Further, in step 6) in data prediction step,
Including：
A) absolute pressure of data preprocessing module is calculated, and absolute pressure calculates and uses formula：P=0.098 × (0.58 ×
10-3γT(1+B)-γ2A)；
A=0.764 × 10-3(1-0.727×10-3γ)；
B=2.51 × 10-3γ(1-0.846×10-3γ)；
Wherein：P：Absolute pressure value, unit：Mpa；
γ：Gas density, unit：kg/m3；
T：Absolute temperature, unit K；
And the temperature coefficient of gas pressure is obtained by above formula：
K=0.098 × (0.58 × 10-3γ (1+B)), unit：Mpa/℃；
Gas density is according to gas density during first dress, or according to pressure and temperature by obtained by above formula Extrapolation；
In operation, calculated by formula and obtain pressure-temperature coefficient k values, with reference to actual temperature value, by the unified conversion of gas pressure to 20 DEG C
At a temperature of pressure, then carry out the comparative analysis of packing pressure, to eliminate temperature factor, make to be accurately calculated；
The SF6 pressure for gathering Real-Time Atmospheric pressure and each air chamber simultaneously, temperature are monitored on-line (due to whole station GIS device temperature
Spend close, some same temperature values of use), each air chamber pressure is compensated.Typically, gather or pressure is monitored on-line
What is indicated on power table is exactly gauge pressure.But the absolute pressure when carrying out parameter calculating or checking curve, both differ 1 air
Pressure.Therefore the pressure value collected is obtained into absolute pressure plus atmospheric value at that time, then trip temperature is entered with absolute pressure and mended
Repay.
B) artificial pressure differential variable quantity between copy data and online monitoring data is calculated：Mathematic interpolation formula is：
P″AH=P 'AH2-P′AH1
Wherein：P′AH1=PA1-PH1
P′AH2=PA2-PH2
PA1：At the moment 1, monitor the air chamber pressure of collection on-line；
PH1：Moment 1, the air chamber pressure manually made a copy of；
PA2：At the moment 2, monitor the air chamber pressure of collection on-line；
PH2：Moment 2, the air chamber pressure manually made a copy of.
As P "AHWhen >=0.02, it is believed that online monitoring data is abnormal, and sending prompting needs manual confirmation.
Wherein, it is used to quote the air chamber for occurring SF6 leakages automatically with the comparison of initial pressure value, it is by the pressure of on-line monitoring
Force data carries out mathematic interpolation with the corresponding air chamber pressure initial value stored, when difference exceedes thresholding, quotes automatically；
Not in the same time pressure ratio compared with and pressure jump judge, for reflecting the air chamber pressure of same air chamber not in the same time, meter
Calculate each air chamber SF6 slips；
Adjacent air cells pressure ratio compared with, not in the same time pressure ratio compared with and pressure jump judge calculated by second order algorithm.
Because the on-line monitoring frequent failure of sensor probe causes corrupt data, and field erected SF6 density meters work
It is very stable seldom to go wrong.Therefore the data import system of density meter monthly will be manually made a copy of twice, is analyzed by comparing to repair
The mistake of positive online monitoring data.After on-line monitoring probe failure is confirmed, online monitoring data is substituted with artificial copy data.
Due to natively there is certain error between on-line monitoring and pressure gauge, therefore, the variable quantity of pressure differential between the two is monitored
Rather than pressure differential is in itself, to verify the correctness of data.
Hereinafter, part job step is further described in detail：
First, the collection and alarm of data
Each air chamber has the operating condition of oneself, and (most of air chamber rated pressures are identical, and are always divided into rated pressure
For several rated pressure), integrated monitoring system carries out concentration displaying to the air chamber pressure collected.Operation maintenance personnel can pass through
Telemetry intelligence (TELINT) table consults the SF6 gas pressure values of each each air chamber of moment, and by the value and alarm pressure value set in advance
It is compared, when less than alarm pressure or rated pressure value, alarms immediately, while releases bulletin information.
2nd, the lateral comparison of data
The each air chambers of GIS have to be separated between connected adjoining air chamber, these air chambers by dielectric.It is adjacent
There is certain pressure differential between air chamber, when pressure differential exceedes certain value, larger pressure may be applied to separate medium and made
Into damage.Therefore it should monitor that relevant regulations value is not to be exceeded in the pressure differential between adjacent air cells.
If the insulation gap between adjacent air cells has leakage, gas will flow to the low gas of pressure from the high air chamber of pressure
Room, by monitoring that pressure differential change between adjacent air cells can detect the interval between air chamber with the presence or absence of leakage, so as to SF6 gas
Body pressure leakages carry out anticipation.
Because rated pressure inherently there may be difference between adjacent air cells, such as the rated pressure of switching gas chamber than
The rated pressure of current transformer air chamber is high.And the gas pressure filled when being filled at the beginning of air chamber is not quite similar, purely more adjacent gas
Pressure differential between room can not correctly reflect the abnormal conditions such as leakage.Therefore, it should handle adjacent using the concept of second order derivation
The pressure value of air chamber, that is, calculate the variable quantity of adjacent air cells pressure differential.
It is assumed that A air chambers and B air chambers are two adjacent air cells.Then the pressure differentials of two adjacent air cells is calculated as follows：
P″AB=P 'AB2-P′AB1
Wherein：P′AB1=PA1-PB1
P′AB2=PA2-PB2
PA1：Moment 1, A air chamber pressures；
PB1：Moment 1, B air chamber pressures；
PA2：Moment 2, A air chamber pressures；
PB2：Moment 2, B air chamber pressures.
In practice, P 'AB1 and P 'AB2 can not directly characterize air chamber situation.Only when two air chamber pressure difference variable quantities reach
During to higher value, illustrate that two air chamber relative pressures are varied widely, i.e. P "ABValue it is larger when explanation two air chambers between
Leaked or one of air chamber occurs compared with gross leak.In formula, P 'AB1, which is typically taken as equipment, starts to put into operation simultaneously
The pressure difference value of adjacent air cells when stablizing relatively, as a constant record in database.
If the leakage of speed quite occurs for two air chambers simultaneously, P "ABValue it is substantially zeroed.But, because air chamber is phase
Connect, the adjacent air cells of any one air chamber always have the adjacent air cells of opposite side.Therefore, leakage air chamber always occur with
Large change situation occurs for the pressure difference value of another adjacent air cells, remains able to detect exception.
3rd, the longitudinal comparison of data
The SF of GIS air chambers6Leakage rate has the specification regulation of correlation.The SF put into operation first6Equipment, leakage rate per year is not
More than 1%, leakage rate per year is no more than 0.5% afterwards.After equipment investment runs and stablized relatively, its reset pressure value is recorded, profit
The pressure value collected with on-line monitoring, can calculate the SF of each air chamber6Leakage rate, so that the air-tightness of supervision equipment is
The no requirement for meeting related code and standard.
Due to SF6Gas pressure can produce the SF gathered in change, system with the change of temperature6Though pressure is through excess temperature
Degree compensation, but there is certain error.In order to eliminate the influence, can comparing same air chamber, (same date is not same in the same time
One moment) pressure.
Pass through the data progress pair to the same collection point of transformer station's whole station SF6 gas online monitoring datas not in the same time
Than calculating difference.Using currency and the difference comparsion of initial value, the variable quantity of air chamber pressure accumulation can be reflected,
So as to carry out anticipation to the slow leakage of air chamber pressure.
The longitudinal comparison criterion of same air chamber pressure is as follows：
With initial value comparison criterion：ΔP0=Ppre-P0≥ΔP0set
Window phase comparison criterion：ΔPt=Ppre-Ppre-t≥ΔPtset
Ppre：The air chamber pressure value that current time collects；
P0：This air chamber initial pressure value；
ΔP0set：Initial pressure compares alarm setting value；
Ppre-t：Air chamber pressure value before window phase；
ΔPtset：Window phase pressure ratio is compared with alarm setting value.
Window phase is divided into week, the moon, season, year and variable, and the variable window phase can set the time cycle in units of hour,
It is usually set to 24 hours.Window phase is fixed, but data are relatively more real-time and carry out every time.It is when receiving on-line monitoring
During the air chamber pressure value sent on system, immediately with one week in database, January, a season, 1 year and setting hourage before this air chamber
The pressure value at this moment is compared.Compared again with the synchronization pressure value before window phase after next data receiver.It is this
Mode realizes comparing in real time for air chamber pressure, rather than Fixed Time Interval is compared.In practical application, using same with the day before yesterday
One moment, with equipment initial pressure compared both of which.
4th, online monitoring data analysis result is shown
Except realize SF6 air chamber pressures show compared with alarm, adjacent spaces air chamber pressure, same interval air chamber not in the same time
Pressure ratio is relatively waited outside SF6 on-line checking data analysis functions, and system is additionally provided in line Monitoring Data curve and form function of browse.
Curve and form can all realize printing and electronic edition output.
4.1 curve
To the data stored with remote measurement amount, current telemetry value can be shown by all possessing picture, can check real-time curve and
History curve.Real-time curve receives the data sent since current time, progressively, and countershaft draws pressure value curve on time.Go through
History curve recalls historical data according to the time interval of setting from database, is depicted as curve.
Curve has comparing function, i.e., with the previous day or a few days ago, the pressure value of same period is contrasted, intuitively
Show the situation of change of pressure.Other interval graphs can be added simultaneously to be contrasted, possess a plurality of curve comparing function.Curve energy
Enough horizontal and vertical stretchings, selective analysis is carried out to suspicious time segment data.
4.2 form
The achievable form of integrated monitoring system has：Air chamber pressure form, adjacent air cells pressure difference value form, when different
Carve air chamber pressure difference form etc..Above form is respectively provided with daily sheet, moon sheet, year form.When daily sheet takes each integral point
Data value, moon sheet takes data value during daily zero point, year data value of form when taking monthly No. 1 zero point.Data are such as in form
Deviate the alarming value (limit value is got in remote measurement) that user gives, shown by different colours, with call user's attention.
Form can real time inspection, printing, can be exported and preserved with excel forms, recycle ftp from monitoring system
It is middle to be copied, to facilitate the export of data and further utilize processing.
The technical program can realize that, to generating date, Realtime Alerts realize SF based on monitoring backstage6Pressure is horizontal
Contrast (adjacent air cells pressure ratio compared with) and longitudinal direction contrast (pressure out-of-limit judge, compared with initial pressure, pressure jump judgement), it is right
The SF that on-line monitoring system is collected6The comprehensive analyzing and processing of pressure value.Effective monitoring to each air chamber pressure, sends out in time
The minor variations of existing air chamber pressure, with regard to that can find defect before the more serious situations such as the low alarm of pressure occur for equipment, are conducive to
Advanced processing equipment safety hidden danger.
Meanwhile, the result that end online monitoring data of standing analyzes senior applied analysis can be by sending shape on integrated data network
State assessment centers, data supporting is provided for ultra-high voltage transformer station repair based on condition of component.With the development of monitoring system and computer technology,
Integrated monitoring system will progressively use modular design concept, and its function will be gradually improved.Modular construction allows monitoring system
System can extend other associated higher application functions such as on-line monitoring while basic monitoring function is ensured.At that time, online prison
The meaning that the data that examining system is collected will obtain implying in deeper utilization, online monitoring data also will be more
Excavate on ground.
GIS device SF6 on-line monitoring systems and its method of work shown in figure 1 above -3 are the specific implementations of the present invention
Example, has embodied substantive distinguishing features of the present invention and progress, can be right under the enlightenment of the present invention according to actual use needs
It carries out shape, the equivalent modifications in terms of structure, this programme protection domain row.
Claims (10)
1.GIS equipment SF6 on-line monitoring systems, it is characterised in that including：
Artificial copy data input module：Input for artificial copy data；
Pressure acquisition module, the pressure for gathering each air chamber in transformer station's GIS device；
Temperature collect module, for gathering the temperature in each or multiple air chambers；
Atmospheric pressure monitoring modular, for gathering atmospheric pressure；
Data resolution module, for being carried out to the information that pressure acquisition module, temperature collect module, atmospheric pressure monitoring modular are obtained
Data are parsed, and obtain corresponding air chamber pressure, temperature and atmospheric pressure；
Data preprocessing module, obtains absolute pressure, according to the corresponding temperature in air chamber to exhausted according to air chamber pressure, atmospheric pressure
Pressure is compensated；And artificial copy data is combined, online monitoring data is modified；
Pressure monitoring analysis module, for carrying out analysis judgement to the data after data prediction resume module；It includes being used for
The out-of-limit judging submodule of pressure of the out-of-limit judgement of pressure, for adjacent air cells pressure ratio compared with adjacent air cells pressure ratio compared with submodule
Block, for not in the same time pressure ratio compared with not initial pressure of the pressure ratio compared with submodule, for being compared with initial pressure value in the same time
Power comparison sub-module, the pressure jump judging submodule judged for pressure jump, adjacent air cells pressure ratio are relatively used to reflect phase
Leakage and its leakiness and speed between adjacent air chamber；Comparison with initial pressure value is used for the automatic generation SF6 that quotes and leaked
Air chamber, the pressure data of on-line monitoring is carried out mathematic interpolation by it with the corresponding air chamber pressure initial value stored, when difference is super
When crossing thresholding, quote automatically；Not in the same time pressure ratio compared with and pressure jump judge, for reflecting the gas of same air chamber not in the same time
Chamber pressure, calculates each air chamber SF6 slips, it is calculated by second order algorithm；Adjacent air cells pressure ratio is compared with passing through second order algorithm
Calculate；
Off-limit alarm module, when pressure monitoring analysis module judges more to prescribe a time limit, carries out off-limit alarm；
Data memory module, the data memory module for data storage.
2. GIS device SF6 on-line monitoring systems according to claim 1, it is characterised in that：Data preprocessing module is in meter
When calculating absolute pressure, using formula：P=0.098 × (0.58 × 10-3γT(1+B)-γ2A)；
A=0.764 × 10-3(1-0.727×10-3γ)；
B=2.51 × 10-3γ(1-0.846×10-3γ)；
Wherein：P：Absolute pressure value, unit：Mpa；
γ：Gas density, unit：kg/m3；
T：Absolute temperature, unit K；
And the temperature coefficient of gas pressure is obtained by above formula：
K=0.098 × (0.58 × 10-3γ (1+B)), unit：Mpa/℃.
Gas density is according to gas density during first dress, or according to pressure and temperature by obtained by above formula Extrapolation；Operation
In, calculated by formula and obtain pressure-temperature coefficient k values, with reference to actual temperature value, by the unified conversion of gas pressure to 20 DEG C of temperature
Under pressure, then carry out the comparative analysis of packing pressure, to eliminate temperature factor, make to be accurately calculated.
3. GIS device SF6 on-line monitoring systems according to claim 1, it is characterised in that：On-line monitoring system also includes
Display module, after the completion of analysis, display module is used to generate form and curve, to carry out SF6 leakage trend to the analysis of data
Anticipation.
4. GIS device SF6 on-line monitoring systems according to claim 1, it is characterised in that：Described pressure acquisition module
Including multiple SF6 pressure monitors, each air chamber of GIS device is equipped with a SF6 pressure monitors to gather each air chamber
Pressure value.
5. GIS device SF6 on-line monitoring systems according to claim 2, it is characterised in that：When transformer station, GIS device is
During 1000KV GIS devices, each 1000kV GIS breaker units configure 1 terminal box, for accessing this breaker unit institute
There are SF6 pressure monitors.
6. GIS device SF6 on-line monitoring systems according to claim 3, it is characterised in that：Described terminal box is located at one
In SF6 on-line monitoring system cabinets, SF6 on-line monitoring systems cabinet access 1000kV GIS status monitoring informations, described SF6 is online
Monitoring system cabinet is provided with the communication module for being used for that 1000kV GIS status monitoring informations to be uploaded to integrated monitoring system.
7. GIS device SF6 on-line monitoring systems according to claim 2, it is characterised in that：When transformer station, GIS device is
During 500kV GIS devices, each 500kV GIS breaker units configure 1 SF6 and monitor sub- IED, while configuring 1 500kV
SF6 monitors main IED on-line, and 500kV SF6 monitor main IED on-line and are connected with the sub- IED of SF6 monitorings for converging status monitoring information
After be uploaded to integrated monitoring system.
8. GIS device SF6 on-line monitoring systems according to claim 1, it is characterised in that：GIS device SF6 is monitored on-line
System accesses integrated application server, IIth area in II area's independence networking, information data using DL/T860 (IEC 61850) agreement
Communication network shutdown is using DL/T634.5104 stipulations and dispatching communications at different levels, transmission on-line monitoring information.
9. using the on-line monitoring method of the GIS device SF6 on-line monitoring systems described in claim 1-5 any claims,
It is characterized in that comprising the following steps：
1) SF6 density meters data are manually made a copy of by artificial copy data step at regular intervals, and will manually be made a copy of
SF6 density meters data pass through artificial copy data input module import system；
2) pressure of each air chamber in pressure acquisition step, SF6 pressure monitors collection transformer station GIS device；
3) temperature acquisition step, the collection of trip temperature during to each air chamber or several air chambers therein；
4) atmospheric pressure monitoring modular, gathers Real-Time Atmospheric pressure；
5) data analyzing step, to being carried out to the information that pressure acquisition module, temperature collect module, atmospheric pressure monitoring modular are obtained
Data are parsed, and obtain corresponding air chamber pressure, temperature and atmospheric pressure；
6) data prediction step, obtains absolute pressure, according to the corresponding temperature pair in air chamber according to air chamber pressure, atmospheric pressure
Absolute pressure is compensated；Calculate the difference between artificial copy data and online monitoring data, when artificial copy data with
When difference between line Monitoring Data is more than threshold value, it is confirmed whether that on-line monitoring probe breaks down, and with artificial copy data
Online monitoring data is substituted, online monitoring data is modified,；
7) data after data prediction resume module are carried out analysis judgement by pressure monitoring analytical procedure；It is out-of-limit including pressure
Judge, adjacent air cells pressure ratio compared with, not in the same time pressure ratio compared with, compared with initial pressure value, pressure jump judgement, adjacent air cells
Pressure ratio is compared with for reflecting leakage and its leakiness and speed between adjacent air cells；Comparison with initial pressure value is used for certainly
Dynamic to quote the air chamber for occurring SF6 leakages, it carries out the pressure data of on-line monitoring with the corresponding air chamber pressure initial value stored
Mathematic interpolation, when difference exceedes thresholding, is quoted automatically；Not in the same time pressure ratio compared with and pressure jump judge, it is same for reflecting
The air chamber pressure of one air chamber not in the same time, calculates each air chamber SF6 slips, it is calculated by second order algorithm；Adjacent air cells pressure
Power compares to be calculated by second order algorithm；
8) off-limit alarm step, when judging more to prescribe a time limit, carries out off-limit alarm；
9) data storage, stores pressure data, and pressure data includes initial pressure value, historical pressures value；
10) step is shown, form and curve are generated according to pressure value, to carry out SF6 leakage trend anticipations to the analysis of data.
10. the on-line monitoring method of GIS device SF6 on-line monitoring systems according to claim 9, it is characterised in that
Step 6) in data prediction step, including：
A) absolute pressure of data preprocessing module is calculated, and absolute pressure calculates and uses formula：P=0.098 × (0.58 × 10-3
γT(1+B)-γ2A)；
A=0.764 × 10-3(1-0.727×10-3γ)；
B=2.51 × 10-3γ(1-0.846×10-3γ)；
Wherein：P：Absolute pressure value, unit：Mpa；
γ：Gas density, unit：kg/m3；
T：Absolute temperature, unit K；
And the temperature coefficient of gas pressure is obtained by above formula：
K=0.098 × (0.58 × 10-3γ (1+B)), unit：Mpa/℃；
Gas density is according to gas density during first dress, or according to pressure and temperature by obtained by above formula Extrapolation；Operation
In, calculated by formula and obtain pressure-temperature coefficient k values, with reference to actual temperature value, by the unified conversion of gas pressure to 20 DEG C of temperature
Under pressure, then carry out the comparative analysis of packing pressure, to eliminate temperature factor, make to be accurately calculated；
B) artificial pressure differential variable quantity between copy data and online monitoring data is calculated：Mathematic interpolation formula is：
P″AH=P 'AH2-P″AH1
Wherein：P″AH1=PA1-PH1
P′AH2=PA2-PH2
PA1：At the moment 1, monitor the air chamber pressure of collection on-line；
PH1：Moment 1, the air chamber pressure manually made a copy of；
PA2：At the moment 2, monitor the air chamber pressure of collection on-line；
PH2：Moment 2, the air chamber pressure manually made a copy of.
As P "AHWhen >=0.02, it is believed that online monitoring data is abnormal, and sending prompting needs manual confirmation.
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| CN114748975A (en) * | 2022-04-24 | 2022-07-15 | 国家电网有限公司 | Online purifying device and system for insulating gas |
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Application publication date: 20171107 |