CN109031053A - The shelf depreciation alarm method and system of for transformer status monitoring intelligent apparatus - Google Patents
The shelf depreciation alarm method and system of for transformer status monitoring intelligent apparatus Download PDFInfo
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- CN109031053A CN109031053A CN201710428060.7A CN201710428060A CN109031053A CN 109031053 A CN109031053 A CN 109031053A CN 201710428060 A CN201710428060 A CN 201710428060A CN 109031053 A CN109031053 A CN 109031053A
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- shelf depreciation
- alarm
- partial discharge
- gas content
- discharge quantity
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention relates to a kind of shelf depreciation alarm method of for transformer status monitoring intelligent apparatus and systems, belong to Transformer's Condition Monitoring technical field.The present invention acquires the content and partial discharge quantity of dissolved gas acetylene in transformer oil or oilpaper first；Then desired value is alerted according to the shelf depreciation that the acetylene gas content and partial discharge quantity of acquisition calculate separately acetylene gas content and partial discharge quantity；Comprehensive shelf depreciation evaluation result is finally determined according to the weight of acetylene gas content and the shelf depreciation of partial discharge quantity alarm desired value and acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation, is determined whether to carry out shelf depreciation alarm according to comprehensive evaluation result.Alarm method of the invention has merged Dissolved Gas Content in Transformer Oil partial discharge quantity, and the accuracy of shelf depreciation alarm is greatly improved, live rate of false alarm is effectively reduced.
Description
Technical field
The present invention relates to a kind of shelf depreciation alarm method of for transformer status monitoring intelligent apparatus and systems, belong to
Transformer's Condition Monitoring technical field.
Background technique
As State Grid Corporation of China intelligently transports the foundation of specimen system, which is by the installation condition sense on primary equipment
Know unit, obtain its status information, then carries out primary equipment status assessment, reach the transformation from interruption maintenance to repair based on condition of component
Purpose, wherein intelligent alarm is one of critical function of repair based on condition of component.The partial discharges fault of transformer is the main of substation
One of operation troubles, the on-line monitoring and accurate alarm for how carrying out partial discharge of transformer are that transformer realizes repair based on condition of component
Prerequisite.Currently, the intelligent transformer of major part 220kV and above is fitted with partial discharge monitoring
Device and oil dissolved gas on-Line Monitor Device, the two can reflect the partial discharges fault of transformer to a certain extent.
And to the alarm of partial discharge of transformer failure determined only with partial discharge quantity at present, due to the information ratio of judgement
It is more single, cause partial discharge alarm there are more the phenomenon that accidentally alerting, influences the normal use of transformer.
Summary of the invention
The object of the present invention is to provide a kind of shelf depreciation alarm method of for transformer status monitoring intelligent apparatus, with
Solving the problems, such as to discharge at present, it is low to alert accuracy rate；The present invention also provides a kind of for transformer status monitoring intelligent apparatus
Shelf depreciation warning system.
It puts the part that the present invention provides a kind of for transformer status monitoring intelligent apparatus to solve above-mentioned technical problem
Electricity alarming method, the alarm method the following steps are included:
1) content and partial discharge quantity of dissolved gas acetylene in transformer oil or oilpaper are acquired；
2) the degree of membership relationship for establishing acetylene gas content and partial discharge quantity and shelf depreciation alarm, according to what is established
Degree of membership relationship and the acetylene gas content and partial discharge quantity of acquisition calculate separately acetylene gas content and partial discharge quantity
Shelf depreciation alert desired value；
3) according to acetylene gas content and the shelf depreciation of partial discharge quantity alarm desired value and acetylene gas content and
Weight of the partial discharge quantity in shelf depreciation alarm evaluation determines comprehensive shelf depreciation evaluation result, according to comprehensive evaluation result
Determine whether to carry out shelf depreciation alarm.
Further, the gas acquired in the step 1) further includes hydrogen, when collected hydrogen content is not exceeded,
Directly judge shelf depreciation output information be it is normal, no longer carry out alarm judgement.
Further, the degree of membership relationship for acetylene gas content and the shelf depreciation alarm established in the step 2) are as follows:
Wherein r (x) is that the shelf depreciation of acetylene gas content alerts desired value, and x is the acetylene gas content of acquisition, and a2 is
The alarm threshold of acetylene gas content, the value range of a1=ma2, m are 0≤m≤1.
Further, the degree of membership relationship for partial discharge quantity and the shelf depreciation alarm established in the step 2) are as follows:
Wherein r (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and y is the partial discharge quantity of acquisition, and b2 is part
The alarm threshold of discharge capacity, the value range of b1=nb2, n are 0≤n≤1.
Further, the comprehensive evaluation result calculation formula in the step 3) is as follows:
Wherein, p1 and p2 is respectively the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation,
The value range of p1 is 0≤p1≤1, and the value range of p2 is 0≤p2≤1；R (x) is that the shelf depreciation of acetylene gas content is accused
Alert desired value, 1-r (x) are that the shelf depreciation of acetylene gas content does not alert desired value；R (y) is that the part of partial discharge quantity is put
Electric alarm desired value, 1-r (y) are that the shelf depreciation of partial discharge quantity does not alert desired value, the alarm output when c1 is greater than c2.
Further, the power of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation in the step 3)
It is again respectively 0.55 and 0.45.
The present invention also provides a kind of shelf depreciation warning system of for transformer status monitoring intelligent apparatus, the alarms
System includes intelligent alarm device and the oil dissolved gas monitoring device and shelf depreciation that connect with intelligent alarm device prison
Survey device；The oil dissolved gas monitoring device is used to acquire the content of dissolved gas acetylene in transformer oil or oilpaper；Institute
Partial discharge monitoring device is stated for acquiring partial discharge of transformer amount；The intelligent alarm device is used for the acetylene according to foundation
The degree of membership relationship and receive acetylene gas content and locally put that gas content and partial discharge quantity are alerted with shelf depreciation
Electricity calculates separately the shelf depreciation alarm desired value of acetylene gas content and partial discharge quantity；And according to acetylene gas content and
The shelf depreciation alarm desired value and acetylene gas content and partial discharge quantity of partial discharge quantity are alerted in shelf depreciation to be evaluated
In weight determine comprehensive shelf depreciation evaluation result, determined whether to carry out shelf depreciation alarm according to comprehensive evaluation result.
Further, the oil dissolved gas monitoring device is also used to acquire dissolved gas in transformer oil or oilpaper
The content of middle hydrogen, the intelligent alarm device are used for the directly output part when collected hydrogen content is less than setting value and put
The normal information of electricity, no longer carries out alarm judgement.
Further, the degree of membership for acetylene gas content and the shelf depreciation alarm established in the intelligent alarm device is closed
System are as follows:
Wherein r (x) is that the shelf depreciation of acetylene gas content alerts desired value, and x is the acetylene gas content of acquisition, and a2 is
The alarm threshold of acetylene gas content, the value range of a1=ma2, m are 0≤m≤1.
Further, the comprehensive evaluation result calculation formula that the intelligent alarm device uses is as follows:
Wherein, p1 and p2 is respectively the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation；r
(x) desired value is alerted for the shelf depreciation of acetylene gas content, 1-r (x) does not alert pre- for the shelf depreciation of acetylene gas content
Time value；R (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and 1-r (y) is that the shelf depreciation of partial discharge quantity does not alert
Desired value carries out alarm output when c1 is greater than c2.
The beneficial effects of the present invention are: the present invention acquire in transformer oil or oilpaper first the content of dissolved gas acetylene and
Partial discharge quantity；Then acetylene gas content is calculated separately according to the acetylene gas content and partial discharge quantity of acquisition and part is put
The shelf depreciation of electricity alerts desired value；Desired value is finally alerted according to acetylene gas content and the shelf depreciation of partial discharge quantity
And the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation determines comprehensive shelf depreciation evaluation knot
Fruit determines whether to carry out shelf depreciation alarm according to comprehensive evaluation result.Alarm method of the invention has merged in transformer oil
Dissolved gas content partial discharge quantity is greatly improved the accuracy of shelf depreciation alarm, live rate of false alarm is effectively reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of partial discharge of transformer warning system of the present invention；
Fig. 2 is the flow chart of partial discharge of transformer alarm method of the present invention；
Fig. 3-a is the degree of membership relation schematic diagram of acetylene gas content and shelf depreciation alarm；
Fig. 3-b is the degree of membership relation schematic diagram of partial discharge quantity and shelf depreciation alarm.
Specific embodiment
A specific embodiment of the invention is described further with reference to the accompanying drawing.
The embodiment of the shelf depreciation alarm method of for transformer status monitoring intelligent apparatus of the present invention
Partial discharge of transformer alert correlation of the invention Gases Dissolved in Transformer Oil on-line monitoring information and part
The content and partial discharge quantity of dissolved gas acetylene in On-line Discharge monitoring information, first acquisition transformer oil or oilpaper；So
Afterwards, according to the acetylene of the degree of membership relationship and acquisition of the acetylene gas content and partial discharge quantity of foundation and shelf depreciation alarm
Gas content and partial discharge quantity calculate separately the shelf depreciation alarm desired value of acetylene gas content and partial discharge quantity；Finally
According to acetylene gas content and the shelf depreciation of partial discharge quantity alarm desired value and acetylene gas content and partial discharge quantity
Weight in shelf depreciation alarm evaluation determines comprehensive shelf depreciation evaluation result, according to comprehensive evaluation result determine whether into
The alarm of row shelf depreciation.
The implementation process of transformer part alarm method in the present embodiment is as shown in Figure 2, the specific steps are as follows:
1. acquiring dissolved gas content and partial discharge quantity in transformer oil or oilpaper.
The gas for including in transformer oil includes hydrogen H2, carbon monoxide CO, methane CH4, acetylene C2H2, C2H4, C2H6
With carbon dioxide CO2 etc., wherein acetylene content is best able to the partial discharges fault of reflection transformer, therefore, what the present invention acquired
It is the content of dissolved gas acetylene in transformer oil or oilpaper.Meanwhile the present invention also needs acquisition partial discharge quantity.
Further, since when partial discharge generates in transformer oil or oilpaper in the predominant gas that generates containing H2, in the content of H2
Partial discharge output information is normal in the case where not exceeded.Therefore the present invention first judges the hydrogen content in transformer oil,
When hydrogen content is less than setting value, illustrates that partial discharge is normal, no longer carry out subsequent judgement；When the hydrogen content detected is not less than
When setting value, illustrating partial discharge, there may be abnormality alarmings, need to further determine that partial discharge situation by subsequent judgement.
2. the shelf depreciation for calculating acetylene gas content and partial discharge quantity alerts desired value.
Acetylene gas content and the shelf depreciation of partial discharge quantity alarm desired value pass through corresponding degree of membership relationship respectively
Formula is calculated, and wherein acetylene gas content and the degree of membership relationship of shelf depreciation alarm are as shown in Fig. 3-a, relational expression are as follows:
Wherein r (x) is that the shelf depreciation of acetylene gas content alerts desired value, and x is the acetylene gas content of acquisition, and a2 is
The alarm threshold of gas content, the value range of a2 are as follows: the value range of 1 μ of μ L/L≤a2≤5 L/L, a1=ma2, m is (0≤m
≤ 1), m value is 0.9 in the present embodiment.
Partial discharge quantity and the degree of membership relationship of shelf depreciation alarm are as shown in Fig. 3-b, relational expression are as follows:
Wherein r (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and y is the partial discharge quantity of acquisition, and b2 is part
The alarm threshold of discharge capacity, the value range of b2 are as follows: 100pC≤b2≤500pC, b1=nb2, the value range of n be 0≤n≤
1, n value is 0.9 in the present embodiment.
3. calculating comprehensive shelf depreciation evaluation result.
Evaluation result is divided into V={ normal, alarm } by the present invention, and partial discharge phenomenon, alarm is not present in normal representation
There are partial discharge phenomenons for representative, operation maintenance personnel need to be caused to pay attention to；The shelf depreciation of C2H2 content drawn game high-volume is alerted and is expected
Value is used as partial discharge evaluation index, and evaluation indice is that U={ be expected by C2H2 content electric discharge alarm desired value, the electric discharge alarm of partial discharge amount
Value }.
Specifically it is first determined the weight of each evaluation index, then according to weight and determining comprehensive shelf depreciation evaluation
As a result.Comprehensive evaluation result calculation formula is as follows:
Wherein, p1 and p2 is respectively the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation；r
(x) desired value is alerted for the shelf depreciation of acetylene gas content, 1-r (x) does not alert pre- for the shelf depreciation of acetylene gas content
Time value；R (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and 1-r (y) is that the shelf depreciation of partial discharge quantity does not alert
Desired value, the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation is respectively 0.55 in the present embodiment
With 0.45.
When obtaining evaluation result v1 greater than v2, illustrates there are partial discharge phenomenon, alarm output need to be carried out；When being commented
When valence result v1 is not more than v2, illustrate to be not required to carry out alarm output there is no partial discharge phenomenon.
The embodiment of the shelf depreciation warning system of for transformer status monitoring intelligent apparatus of the present invention
The warning system of the present embodiment is as shown in Figure 1, include intelligent alarm device, oil dissolved gas monitoring device drawn game
Portion's discharge monitoring device, wherein oil dissolved gas monitoring device and partial discharge monitoring device pass through 61850 mode of IEC
It is communicated to connect with intelligent alarm device.
Oil dissolved gas monitoring device is used to acquire the content and hydrogen of dissolved gas acetylene in transformer oil or oilpaper
Content, and it is transmitted to intelligent alarm device；Partial discharge monitoring device for acquiring partial discharge of transformer amount, and by its
It is transferred to intelligent alarm device；Intelligent alarm device is according to receiving acetylene gas content and partial discharge quantity calculates separately acetylene
The shelf depreciation of gas content and partial discharge quantity alerts desired value, and alerts desired value and acetylene gas according to each shelf depreciation
The weight of body content and partial discharge quantity in shelf depreciation alarm evaluation determines comprehensive shelf depreciation evaluation result, overall merit
As a result determine whether to carry out shelf depreciation alarm.
As it can be seen that the present invention has merged Gases Dissolved in Transformer Oil on-line monitoring information and local On-line Discharge monitoring information
It carries out shelf depreciation alarm, the gas content information of reflection transformer discharge failure, pole is increased in the Rule of judgment of alarm
The big accuracy for improving shelf depreciation alarm, is effectively reduced live rate of false alarm.
Claims (10)
1. a kind of shelf depreciation alarm method of for transformer status monitoring intelligent apparatus, which is characterized in that the alarm method
The following steps are included:
1) content and partial discharge quantity of dissolved gas acetylene in transformer oil or oilpaper are acquired；
2) the degree of membership relationship for establishing acetylene gas content and partial discharge quantity and shelf depreciation alarm, is subordinate to according to what is established
Degree relationship and the acetylene gas content and partial discharge quantity of acquisition calculate separately the office of acetylene gas content and partial discharge quantity
Portion's electric discharge alarm desired value；
3) according to acetylene gas content and the shelf depreciation of partial discharge quantity alarm desired value and acetylene gas content and part
Weight of the discharge capacity in shelf depreciation alarm evaluation determines comprehensive shelf depreciation evaluation result, is determined according to comprehensive evaluation result
Whether shelf depreciation alarm is carried out.
2. the shelf depreciation alarm method of for transformer status monitoring intelligent apparatus according to claim 1, feature
It is, the gas acquired in the step 1) further includes hydrogen, and when collected hydrogen content is not exceeded, directly judgement is local
Electric discharge output information be it is normal, no longer carry out alarm judgement.
3. the shelf depreciation alarm method of for transformer status monitoring intelligent apparatus according to claim 1, feature
It is, the degree of membership relationship for acetylene gas content and the shelf depreciation alarm established in the step 2) are as follows:
Wherein r (x) is that the shelf depreciation of acetylene gas content alerts desired value, and x is the acetylene gas content of acquisition, and a2 is acetylene
The alarm threshold of gas content, the value range of a1=ma2, m are 0≤m≤1.
4. the shelf depreciation alarm method of for transformer status monitoring intelligent apparatus according to claim 1, feature
It is, the degree of membership relationship for partial discharge quantity and the shelf depreciation alarm established in the step 2) are as follows:
Wherein r (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and y is the partial discharge quantity of acquisition, and b2 is shelf depreciation
The alarm threshold of amount, the value range of b1=nb2, n are 0≤n≤1.
5. the shelf depreciation alarm method of for transformer status monitoring intelligent apparatus according to claim 1, feature
It is, the comprehensive evaluation result calculation formula in the step 3) is as follows:
Wherein, p1 and p2 is respectively the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation；r(x)
Desired value is alerted for the shelf depreciation of acetylene gas content, 1-r (x) is that the shelf depreciation of acetylene gas content does not alert expection
Value；R (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and 1-r (y) does not alert pre- for the shelf depreciation of partial discharge quantity
Time value, the alarm output when c1 is greater than c2.
6. the shelf depreciation alarm method of for transformer status monitoring intelligent apparatus according to claim 5, feature
It is, the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation is respectively 0.55 in the step 3)
With 0.45.
7. a kind of shelf depreciation warning system of for transformer status monitoring intelligent apparatus, which is characterized in that the warning system
It is filled including intelligent alarm device and the oil dissolved gas monitoring device and partial discharge monitoring that are connect with intelligent alarm device
It sets；The oil dissolved gas monitoring device is used to acquire the content of dissolved gas acetylene in transformer oil or oilpaper；The office
Portion's discharge monitoring device is for acquiring partial discharge of transformer amount；The intelligent alarm device is used for the acetylene gas according to foundation
The degree of membership relationship and receive acetylene gas content and partial discharge quantity that content and partial discharge quantity and shelf depreciation alert
Calculate separately the shelf depreciation alarm desired value of acetylene gas content and partial discharge quantity；And according to acetylene gas content and part
The shelf depreciation alarm desired value and acetylene gas content and partial discharge quantity of discharge capacity are in shelf depreciation alarm evaluation
Weight determines comprehensive shelf depreciation evaluation result, is determined whether to carry out shelf depreciation alarm according to comprehensive evaluation result.
8. the shelf depreciation warning system of for transformer status monitoring intelligent apparatus according to claim 7, feature
It is, the oil dissolved gas monitoring device is also used to acquire in transformer oil or oilpaper containing for hydrogen in dissolved gas
Amount, the intelligent alarm device, which is used for the directly output shelf depreciation when collected hydrogen content is less than setting value, normally to be believed
Breath, no longer carries out alarm judgement.
9. the shelf depreciation warning system of for transformer status monitoring intelligent apparatus according to claim 7, feature
It is, the degree of membership relationship of the acetylene gas content established in the intelligent alarm device and shelf depreciation alarm are as follows:
Wherein r (x) is that the shelf depreciation of acetylene gas content alerts desired value, and x is the acetylene gas content of acquisition, and a2 is acetylene
The alarm threshold of gas content, the value range of a1=ma2, m are 0≤m≤1.
10. the shelf depreciation warning system of for transformer status monitoring intelligent apparatus according to claim 7, feature
It is, the comprehensive evaluation result calculation formula that the intelligent alarm device uses is as follows:
Wherein, p1 and p2 is respectively the weight of acetylene gas content and partial discharge quantity in shelf depreciation alarm evaluation；r(x)
Desired value is alerted for the shelf depreciation of acetylene gas content, 1-r (x) is that the shelf depreciation of acetylene gas content does not alert expection
Value；R (y) is that the shelf depreciation of partial discharge quantity alerts desired value, and 1-r (y) does not alert pre- for the shelf depreciation of partial discharge quantity
Time value carries out alarm output when c1 is greater than c2.
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Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |