CN106249065B - A kind of analogue measurement device - Google Patents
A kind of analogue measurement device Download PDFInfo
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- CN106249065B CN106249065B CN201610621926.1A CN201610621926A CN106249065B CN 106249065 B CN106249065 B CN 106249065B CN 201610621926 A CN201610621926 A CN 201610621926A CN 106249065 B CN106249065 B CN 106249065B
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- fuel tank
- transformer
- oil stream
- analogue measurement
- measurement device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention provides a kind of analogue measurement device, is used for analogue measurement oil flow electrified degree of transformer.The analogue measurement device includes the simulator for simulating the running environment of the transformer, and the detection device for measuring the oil flow electrified degree of transformer in the running environment.The simulator includes the first connecting tube and the second connecting tube of the first fuel tank, the second fuel tank and connection first fuel tank and the second fuel tank, and first fuel tank, the first connecting tube, the second fuel tank and the second connecting tube form a closed path.It is provided with insulating cylinder described in insulating cylinder, copper wire and the transformer oil stream in first fuel tank and copper wire is soaked in the transformer oil stream.The detection device includes the pico-ampere table testing electrode and being electrically connected with the test electrode, and the pico-ampere table is used to measure the oil flow electrified degree of transformer in the running environment to obtain current signal.
Description
Technical field
The present invention relates to signal detection field, for body, it is related to a kind of analogue measurement device.
Background technique
Currently, power transformer manufacturing firm is to save manufacturing cost both at home and abroad, generallys use and improve transformer oil stream stream
The mode of speed accelerates distributing for transformer heat, to reduce the area of radiator.But the increase of transformer oil stream flow velocity causes
Friction stree between transformer oil stream and insulating board increases, so as to cause transformer oil stream and insulating board bipolar electrode layer
Charge generates separation, so that transformer oil flows out existing positive charge, has seriously affected the operation of transformer.Reduce transformer oil stream
Influence of the electrified degree to transformer station high-voltage side bus, it is necessary to first running transformer oil stream be measured, to identify different oil stream streams
The electrified degree of the lower transformer oil stream of speed.However in the various on-Line Monitor Devices of existing transformer, not to transformer oil stream band
The device that electric degree is monitored.Also the not no real time execution work of analogue transformer when existing transformer monitoring device is monitored
Condition, so that the data in the data and actual motion that detect are deviated.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of analogue measurement device, it can be in the feelings that transformer does not power off
The electrified degree of the transformer oil stream is monitored under condition.
To achieve the goals above, the embodiment of the present invention adopts the following technical scheme that
A kind of analogue measurement device, is used for analogue measurement oil flow electrified degree of transformer, and the analogue measurement device includes using
In the simulator for the running environment for simulating the transformer, and for measuring the transformer oil stream band in the running environment
The detection device of electric degree；
The simulator includes the first of the first fuel tank, the second fuel tank and connection first fuel tank and the second fuel tank
Connecting tube and the second connecting tube, so that first fuel tank, the first connecting tube, the second fuel tank and the second connecting tube form a circulation
System；Insulating cylinder, copper wire and the transformer oil stream are provided in first fuel tank, the insulating cylinder and copper wire are soaked in institute
State transformer oil stream；The detection device includes the pico-ampere table testing electrode and being electrically connected with the test electrode, the skin
Peace table is used to measure the oil flow electrified degree of transformer in the running environment to obtain current signal.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, first fuel tank is additionally provided with
Temperature-detecting device and heating device, the temperature-detecting device are used to detect the temperature of the transformer oil, the heating dress
It sets for being heated to the transformer oil.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the temperature-detecting device setting
In the side wall of first fuel tank, the heating device is set to first tank bottoms.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the bottom of the heating device and
The bottom of second fuel tank is respectively arranged with insulation spacer.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, first connecting tube and described
Second connecting tube is provided with flow control valve, and first connecting tube is additionally provided with the stream for detecting the transformer oil stream
The variable pump of the flowmeter of amount and the flow velocity for adjusting the transformer oil stream.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the insulating cylinder is exhausted by high density
Edge cardboard is made, and the insulating cylinder includes insulation inner cylinder and insulation outer cylinder, and the insulation inner cylinder is provided with electrode in copper foil, described
Insulation outer cylinder is provided with copper foil external electrode.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the insulating cylinder, copper wire and transformation
The weight ratio of device oil is respectively 5%, 35% and 60%.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the detection device includes two
The end of the test electrode, two test electrodes is respectively arranged with current sensor probe, and the current sensor is visited
Head is apart from 1 millimeter to 3 millimeters of the transformer oil stream；The pico-ampere table ground connection, and be electrically connected with two test electrodes.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, first fuel tank, the second fuel tank
Electrostatic screen layer is respectively equipped with pico-ampere off-balancesheet.
In the embodiment of the present invention preferably selects, in above-mentioned analogue measurement device, the measurement range of the pico-ampere table
Are as follows: 20aA~20mA, internal resistance are less than or equal to 1G Ω, and response speed is every 1kV less than 3 milliseconds.
Analogue measurement device provided by the invention includes simulator and detection device, wherein the simulator passes through
First fuel tank, the second fuel tank, connection the first fuel tank and the second fuel tank the first connecting tube and the second connecting tube, transformer oil stream with
And it is soaked in the insulating cylinder of the transformer oil stream and copper wire simulates the running environment of the transformer, the detection device passes through
Pico-ampere table and test electrode measure oil flow electrified degree of transformer.By above-mentioned setting, the analogue measurement device can
The oil flow electrified degree of transformer is measured the case where transformer does not power off.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of structural schematic diagram of simulator provided in an embodiment of the present invention.
Fig. 2 is a kind of structural schematic diagram of insulating cylinder provided in an embodiment of the present invention.
Fig. 3 is a kind of connection block diagram of detection device provided in an embodiment of the present invention.
Fig. 4 is a kind of structural schematic diagram of detection device provided in an embodiment of the present invention.
Appended drawing reference:
100- simulator；
The first fuel tank of 110-；
111- insulating cylinder, 1111- insulate inner cylinder, and 1112- insulate outer cylinder, electrode in 1113- copper foil, 1114- copper foil dispatch from foreign news agency
Pole；
112- temperature-detecting device, 113- heating device；
The second fuel tank of 120-；
The first connecting tube of 130-, 131- flowmeter, 132- variable pump；
140 second connecting tubes, 150- insulation spacer, 160- flow control valve；
200- detection device, 210- pico-ampere table, 220- test electrode, 230- current sensor probe.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
The embodiment of the present invention provides a kind of analogue measurement device, is used for analogue measurement oil flow electrified degree of transformer.According to reality
Border demand, the transformer can be forced oil stream circulating air cooling transformer, because forcing the oil stream stream of oil stream air-cooled transformer
Speed is larger, it is easier to lead to occur electrostatic in oil stream.Wherein, the analogue measurement device includes for simulating the transformer
The simulator of running environment, and the detection device for measuring the oil flow electrified degree of transformer in the running environment.
Fig. 1 is simulator 100 provided in an embodiment of the present invention.As shown in Figure 1, the simulator 100 includes first
First connecting tube 130 and second of fuel tank 110, the second fuel tank 120 and connection first fuel tank 110 and the second fuel tank 120
Connecting tube 140.Insulating cylinder 111, copper wire and the transformer oil stream, the insulating cylinder 111 are provided in first fuel tank 110
The transformer oil stream is soaked in copper wire.The insulating cylinder 111 for analogue transformer high-voltage winding and low pressure winding it
Between main leakage airway, the copper wire be used for analogue transformer coil.The transformer oil stream can marked by vacuum drying
Its pressure voltage can be greater than or equal to 65kV under quasi- gap.
Wherein, the first connecting tube 130 is connected to the upper end of first fuel tank 110 and the second fuel tank 120, the second connecting tube
140 are connected on first fuel tank 110 and the opposite side wall of the second fuel tank 120 close to first fuel tank 110 and the second oil
The position of 120 bottom end of case.Above-mentioned setting is so that first fuel tank 110, the first connecting tube 130, the second fuel tank 120 and second connect
Adapter tube 140 forms a closed path, and the transformer oil stream can circulate in the closed path.Optionally, first
Fuel tank 110 and 120 bottom of the second fuel tank are provided with insulation spacer 150 so that first fuel tank 110 and the second fuel tank 120 are exhausted
Edge.Optionally, the insulation spacer 150 can be made of polytetrafluoroethylene (PTFE).
Optionally, first connecting tube 130 and the second connecting tube 140 are provided with flow control valve 160, implement
When, the flow control valve 160 opening can be made to be connected between first fuel tank 110 and the second fuel tank 120 to be formed
The closed path.According to actual needs, first connecting tube 130 is also provided with flowmeter 131 and variable pump 132.
The flowmeter 131 is used to measure the flow of the transformer oil stream, and the variable pump 132 is for adjusting the transformer oil stream
Flow velocity.Wherein, the flow velocity adjustable range of the variable pump 132 can be 0~7m/s or 0~150L/min, and caliber can be
20 millimeters.
It should be noted that the flow value that the current flow of the transformer oil stream can be measured according to the flowmeter 131
It is calculated, when implementation, the simulator 100 can be monitored according to calculated current flow, adjust transformation at any time
Device oil stream flow velocity is so that it levels off to the flow velocity of the transformer oil stream under actual motion environment.
Optionally, first fuel tank 110 is also provided with temperature-detecting device 112 and heating device 113.According to reality
Border demand, the temperature-detecting device 112 can be set in the side wall of first fuel tank 110, to measure first oil
The temperature of transformer oil stream in case 110, to realize the real time monitoring to the transformer oil stream temperature.The heating device
113 are set between the bottom and the insulation spacer 150 of first fuel tank 110, i.e., the described insulation spacer 150 is set to institute
State the bottom of heating device 113.It is described to add when the temperature-detecting device 112 shows that the transformer oil stream temperature is too low
Thermal 113 is used to heat the transformer oil stream in first fuel tank 110.Transformer after heating, in the first fuel tank 110
Transformer oil in oil stream and the second fuel tank 120 flows out existing temperature gap, so that the transformer oil stream is along the closed path
It circulates.The true running environment of the transformer can be simulated by above-mentioned setting.
Fig. 2 is a kind of diagrammatic cross-section of insulating cylinder 111 provided in an embodiment of the present invention.As shown in Fig. 2, optionally, institute
Stating insulating cylinder 111 includes insulation inner cylinder 1111 and insulation outer cylinder 1112.The insulation inner cylinder 1111 is provided with electrode in copper foil
1113, the insulation outer cylinder 1112 is provided with copper foil external electrode 1114.It should be noted that electrode 1113 and copper in the copper foil
The specific setting position of foil external electrode 1114 with no restrictions, as long as not contacted with the end of the insulating cylinder 111.It is preferred that
Ground, electrode 1113 and copper foil external electrode 1114 can be pasted on the middle position of the insulating cylinder 111 in the copper foil.
Optionally, the insulating cylinder 111 is made of high density insulating board, and the high density insulating board is resistivity
Paper insulating material high, conductive capability is low, the high density insulating board can pass through vacuum drying in 48 hours or more.Institute
It states insulating cylinder 111 and matches review insulation system as the strong circulation of oil flow air-cooled transformer with transformer oil stream.Insulation
The weight ratio of cardboard, copper wire and transformer oil stream also has certain influence to the oil flow electrified degree of transformer in operating status, excellent
Selection of land, above-mentioned insulating cylinder 111 be the weight ratio of high density insulating board, copper wire and transformer oil stream can be respectively 5%,
35% and 60%, but not limited to this.
As shown in Figure 3, Figure 4, the detection device 200 includes pico-ampere table 210, test electrode 220 and is set to the survey
The current sensor probe 230230 of electrode 220 is tried, the pico-ampere table 210 is for measuring the oil flow electrified degree of transformer.Institute
It states current sensor probe 230 and the test electrode 220 is electrically connected, the test electrode 220 and 210 electricity of pico-ampere table
Property connection.Optionally, the test electrode 220 can be electrically connected by coaxial cable and the pico-ampere table 210.The electric current
Sensor probe 230 can be non-contact optical probe, and when implementation, the current sensor probe 230 is apart from the transformer oil
1 millimeter to 3 millimeters of stream can sense current signal.Specifically, the current sensor probe 230 may include Hall element
And iron core, the Hall element are set to the gap of the iron core as field sensing component.Optionally, the current sensor
The tolerable temperature of probe 230 can be 0~40 DEG C, and humidity range can be 90%.
When implementation, pico-ampere table 210 is by being set to the current sensor probe 230 and transformer for testing electrode 220
Oil stream is electrically connected.After the transformer oil stream is stablized, the oil in first fuel tank 110 and the second fuel tank 120 is equipotentiality body,
Potential difference is generated with the earth, the potential difference, which acts on, forms a small current signal in the big internal resistance of the pico-ampere table 210.
Optionally, the noise of the pico-ampere table 210 can be less than 1fA, and measurement range can be 20aA~20mA, internal resistance
1G Ω can be greater than or equal to, response speed can be every 1kV less than 3 milliseconds.According to above content, the pico-ampere table 210 can
To select The Model 6514.It should be noted that the pico-ampere table 210 can be electrically connected with host computer, will examine
The current signal measured is transferred to host computer and carries out data analysis, obtains different oil stream flow velocitys and oil flow electrified degree of transformer
Between relationship, and transformer is improved according to the relationship.
According to actual needs, optionally, first fuel tank 110, the second fuel tank 120, pico-ampere table 210 and coaxial cable
It can also be respectively arranged with electrostatic screen layer, outside to prevent extraneous generate to tiny current measurement from interfering.
The working principle of analogue measurement device provided in an embodiment of the present invention are as follows: transformation is simulated by simulator 100
The running environment of device detects the oil flow electrified degree of transformer in the running environment by detection device 200.Wherein, it insulate
Cylinder 111 is for the main leakage airway between the high-voltage winding and low pressure winding of analogue transformer.Temperature-detecting device 112 and heating
Temperature of the device 113 for real-time monitoring and the control transformer oil stream, so that the temperature of the transformer oil stream reaches true
Temperature under real running environment.The stream of flowmeter 131 and variable pump 132 for real-time monitoring and the adjusting transformer oil stream
Speed, with the flow velocity for the transformer oil stream being close under true operating status.Under the continuous flowing of transformer oil stream, the change
Depressor oil stream is that high density insulating board rubs with insulating cylinder 111, so that forming the wooden of the high density insulating board
Electron cloud in element shifts, so that the anion in the transformer oil stream is adsorbed in insulating cylinder 111, remaining positive charge
It is flowed with the transformer oil stream.The survey that the detection device 200 passes through pico-ampere table 210, is electrically connected at the pico-ampere table 210
It tries electrode 220 and is set to the current sensor probe 230 of the test electrode 220 to detect the transformer oil flow electrification
Degree is to obtain current signal.Wherein, 210 one end of pico-ampere table is grounded, and the other end passes through test electrode 220 and current sensor probe
230 are electrically connected with the transformer oil stream, and the transformer oil stream is equipotentiality body, and a potential difference, institute are formed between the earth
State the big internal resistance one small current signal of formation that potential difference acts on pico-ampere table 210.
In conclusion analogue measurement device provided in an embodiment of the present invention is real by the real running environment of analogue transformer
The test transformer oil flow electrification degree in the case where transformer does not power off is showed.Pass through the measurement data of the analogue measurement device
It can analyze out the influence different in flow rate to its electrified degree of transformer oil stream, to targetedly optimize the insulation of transformer
Structure.Can also be measured on the basis of above-mentioned simulator 100 other oil index data with the research and development of auxiliary transformer and
Manufacture.
In the description of the present invention, it should be noted that the orientation or position of the instructions such as term " on ", "lower", "inner", "outside"
Set relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when the orientation or position usually put
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In the description of the present invention, it is also necessary to explanation, term " setting ", " connected ", " connection " shall be understood in a broad sense,
It for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, be also possible to electricity
Connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of analogue measurement device is used for analogue measurement oil flow electrified degree of transformer, which is characterized in that the analogue measurement dress
The simulator including the running environment for simulating the transformer is set, and for measuring the transformation in the running environment
The detection device of device oil flow electrification degree；
The simulator includes the first connection of the first fuel tank, the second fuel tank and connection first fuel tank and the second fuel tank
Pipe and the second connecting tube, first fuel tank, the first connecting tube, the second fuel tank and the second connecting tube form a closed path；Institute
It states and is provided with insulating cylinder, copper wire and the transformer oil stream in the first fuel tank, the insulating cylinder and copper wire are soaked in the transformation
Device oil stream；The detection device includes the pico-ampere table testing electrode and being electrically connected with the test electrode, and the pico-ampere table is used
In the oil flow electrified degree of transformer in the measurement running environment to obtain current signal；
Wherein, the insulating cylinder is made of high density insulating board, and the insulating cylinder includes insulation inner cylinder and insulation outer cylinder, described
Insulation inner cylinder is provided with electrode in copper foil, and the insulation outer cylinder is provided with copper foil external electrode.
2. analogue measurement device according to claim 1, which is characterized in that first fuel tank is additionally provided with temperature detection
Device and heating device, the temperature-detecting device is used to detect the temperature of the transformer oil stream in first fuel tank, described
Heating device is used to heat the transformer oil stream in first fuel tank, so that the change in first fuel tank and the second fuel tank
The flowing of depressor circulation of oil flow.
3. analogue measurement device according to claim 2, which is characterized in that the temperature-detecting device is set to described
The side wall of one fuel tank, the heating device are set to first tank bottoms.
4. analogue measurement device according to claim 3, which is characterized in that the bottom of the heating device and the second fuel tank
Bottom be respectively arranged with insulation spacer.
5. analogue measurement device according to claim 1, which is characterized in that first connecting tube and second connection
Pipe is provided with flow control valve, and first connecting tube is additionally provided with the flow of the flow for measuring the transformer oil stream
The variable pump of meter and the flow velocity for adjusting the transformer oil stream.
6. analogue measurement device according to claim 1, which is characterized in that the insulating cylinder, copper wire and transformer oil stream
Weight ratio be respectively 5%, 35% and 60%.
7. analogue measurement device according to claim 1, which is characterized in that the end of the test electrode is provided with electric current
Sensor probe, the current sensor probe is apart from 1 millimeter to 3 millimeters of the transformer oil stream；The pico-ampere table one terminates
Ground, the other end and the test electrode are electrically connected.
8. analogue measurement device according to claim 1, which is characterized in that first fuel tank, the second fuel tank and pico-ampere
Off-balancesheet is respectively equipped with electrostatic screen layer.
9. analogue measurement device according to claim 1, which is characterized in that the measurement range of the pico-ampere table are as follows: 20aA
~20mA, internal resistance are less than or equal to 1G Ω, and response speed is every 1kV less than 3 milliseconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610621926.1A CN106249065B (en) | 2016-08-02 | 2016-08-02 | A kind of analogue measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621926.1A CN106249065B (en) | 2016-08-02 | 2016-08-02 | A kind of analogue measurement device |
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| CN106249065A CN106249065A (en) | 2016-12-21 |
| CN106249065B true CN106249065B (en) | 2019-01-18 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109188056A (en) * | 2018-10-25 | 2019-01-11 | 国网黑龙江省电力有限公司电力科学研究院 | Without oil flow electrification characteristic detection device and its detection method when applying electric field outside |
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