CN207798953U - A kind of test device of CVT capacitances dielectric loss and capacitance - Google Patents
A kind of test device of CVT capacitances dielectric loss and capacitance Download PDFInfo
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- CN207798953U CN207798953U CN201820065036.1U CN201820065036U CN207798953U CN 207798953 U CN207798953 U CN 207798953U CN 201820065036 U CN201820065036 U CN 201820065036U CN 207798953 U CN207798953 U CN 207798953U
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Abstract
The utility model embodiment discloses the test device of a kind of CVT capacitances dielectric loss and capacitance, and differential current sensor cramp joint drains end in the high pressure of CVT, and band shielding p-wire is separately connected differential current sensor and the full-automatic anti-jamming dielectric loss tester；High-potting p-wire is separately connected the HV Terminal at the Hi-pot test end and CVT of full-automatic anti-jamming dielectric loss tester, the low-voltage terminal ground connection of CVT；First CVT self-excitation method secondary pressurized lines connect the low voltage experiment end of full-automatic anti-jamming dielectric loss tester and the ends da of CVT, and the 2nd CVT self-excitation method secondary pressurized lines connect the ground terminal of full-automatic anti-jamming dielectric loss tester and the ends dn of CVT.The electric current that CVT main capacitances are acquired using differential current sensor with the main capacitance of quick and precisely CVT and can divide the capacitance and dielectric loss value of capacitance in conjunction with full-automatic anti-jamming dielectric loss tester.
Description
Technical field
The utility model is related to the tests of technical field of electrical measurement more particularly to a kind of CVT capacitances dielectric loss and capacitance
Device.
Background technology
Capacitance type potential transformer (CVT, Capacitance type voltage transformer) is in electric system
In play as meter, protector measuring voltage, carrier frequency can also be coupled to power transmission line and surveyed for long distance communication, a distant place
The HF protection for transmission line etc. of amount, selectivity.
It is required in preventive trial regulation：When the capacitance using electromagnetic unit as power measurement capacitance type potential transformer
Divider main capacitance and when dividing the capacitance and capacitance dielectric loss of capacitance, should be provided to carry out by manufactory.Manufactory is dispatching from the factory
CVT self-excitation methods are all made of when experiment, scene handing-over to be tested.
Also tested using CVT self-excitation methods when preventive trial.But for the electricity of 110kV, 35kV voltage class
When appearance formula voltage transformer (CVT) carries out self-excitation method test dielectric loss and capacitance, mutual inductor high pressure drainage thread need to be disengaged.Because of mutual inductor
It is generally set up on the framework of 2m high, disengaging mutual inductor high pressure drainage thread needs personnel to climb to eminence progress, and there are high-rise workings
Risk, and disengaged before testing, test and restore that a large amount of test period of testing crew will be wasted.Therefore lead to traditional CVT capacitances
The test job difficulty of dielectric loss and capacitance is high, and working efficiency is low.
Utility model content
The utility model provides the test device of a kind of CVT capacitances dielectric loss and capacitance, to solve traditional CVT capacitances
The low problem of the test job efficiency of dielectric loss and capacitance.
In order to solve the above-mentioned technical problem, the utility model embodiment discloses following technical solution：
A kind of test device of CVT capacitances dielectric loss and capacitance, including：It is differential current sensor, band shielding p-wire, complete
Automatic Anti-interference dielectric loss tester, high-potting p-wire and CVT self-excitation method secondary pressurized lines, wherein：The differential electricity
Flow sensor cramp joint drains end in the high pressure of CVT, and the band shielding p-wire is separately connected the differential current sensor and institute
State full-automatic anti-jamming dielectric loss tester；The high-potting p-wire is separately connected the full-automatic anti-interference medium damage
Consume the HV Terminal at the Hi-pot test end and CVT of tester, the low-voltage terminal ground connection of the CVT；The CVT self-excitation methods are secondary to be added
Crimping includes the first CVT self-excitation method secondary pressurized lines and the 2nd CVT self-excitation method secondary pressurized lines, the first CVT self-excitation methods two
Secondary pressurized line connects the ends da at the low voltage experiment end and CVT of the full-automatic anti-jamming dielectric loss tester, the 2nd CVT
Self-excitation method secondary pressurized line connects the ends dn of the ground terminal and CVT of the full-automatic anti-jamming dielectric loss tester.
Optionally, the differential current sensor is loop coil of the uniform winding on nonferromugnetic material, defeated
Go out the integral that signal is Current versus time.
Optionally, the high pressure drainage end of CVT connects a high pressure and drains conducting wire, the differential current sensor and the high pressure
Drainage conducting wire is connected.
Optionally, the high pressure drainage conducting wire is provided with a ground wire, and described ground wire one end is led with high pressure drainage
Line connects, other end ground connection.
As seen from the above technical solution, the survey for a kind of CVT capacitances dielectric loss and capacitance that the utility model embodiment provides
Trial assembly is set, including：Differential current sensor, band shielding p-wire, full-automatic anti-jamming dielectric loss tester, high-potting are surveyed
Line and CVT self-excitation method secondary pressurized lines are tried, wherein：High pressure of the differential current sensor cramp joint in CVT drains end, the band
Shielding p-wire is separately connected the differential current sensor and the full-automatic anti-jamming dielectric loss tester；The high pressure
Experimental test line is separately connected the HV Terminal at the Hi-pot test end and CVT of the full-automatic anti-jamming dielectric loss tester,
The low-voltage terminal of the CVT is grounded；The CVT self-excitation methods secondary pressurized line includes the first CVT self-excitation method secondary pressurized lines and the
Two CVT self-excitation method secondary pressurized lines, the first CVT self-excitation method secondary pressurized lines connect the full-automatic anti-jamming dielectric loss
The low voltage experiment end of tester and the ends da of CVT, the 2nd CVT self-excitation method secondary pressurized lines connection are described full-automatic anti-interference
The ground terminal of dielectric loss tester and the ends dn of CVT.The electric current that CVT main capacitances are acquired using differential current sensor, in conjunction with
Full-automatic anti-jamming dielectric loss tester with the main capacitance of quick and precisely CVT and can divide the capacitance and dielectric loss value of capacitance.
Description of the drawings
It, below will be to attached drawing needed in the embodiment in order to illustrate more clearly of the technical solution of the utility model
It is briefly described, it should be apparent that, for those of ordinary skills, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural schematic diagram of the test device of CVT capacitances dielectric loss and capacitance provided by the utility model；
Fig. 2 is a kind of test schematic of the test device of CVT capacitances dielectric loss and capacitance provided by the utility model；
Symbolic indication is in Fig. 1-2：
1- differential current sensors, 2- band shielding p-wires, the full-automatic anti-jamming dielectric loss testers of 3-, the examination of 4- high pressures
Test p-wire, 5-CVT self-excitation method secondary pressurized lines, the first CVT self-excitation method secondary pressurized lines of 51-, the 2nd CVT self-excitation methods two of 52-
Secondary pressurized line, 6- high pressures drain conducting wire, 7- ground wires, 8-CVT.
Specific implementation mode
The utility model is described in detail below in conjunction with the accompanying drawings.
Referring to a kind of structural representation for the test device that Fig. 1 is CVT capacitances dielectric loss and capacitance provided by the utility model
Figure, as shown in Figure 1, described device includes：Differential current sensor 1, band shielding p-wire 2, full-automatic anti-jamming dielectric loss
Tester 3, high-potting p-wire 4 and CVT self-excitation method secondary pressurizeds line 5.
1 cramp joint of the differential current sensor drains end in the high pressure of CVT8, and the differential current sensor is one equal
The even loop coil being wrapped on nonferromugnetic material, output signal is the integral of Current versus time, by one to output
The circuit that voltage signal is integrated can really restore input current.The high pressure drainage end connection high pressure of CVT8 drains conducting wire 6,
The differential current sensor 1 is connected with high pressure drainage conducting wire 6.High pressure drainage conducting wire 6 is provided with a ground wire 7, institute
It states 7 one end of ground wire to connect with high pressure drainage conducting wire 6, other end ground connection.
The band shielding p-wire 2 is separately connected the differential current sensor 1 and the full-automatic anti-interference medium damage
Tester 3 is consumed, the band shielding p-wire 2 connects one end of the differential current sensor 1 and high pressure drainage conducting wire 6 is led
It is logical.The high-potting p-wire 4 be separately connected the full-automatic anti-jamming dielectric loss tester 3 Hi-pot test end and
The HV Terminal of CVT8, the low-voltage terminal ground connection of the CVT8.
The CVT self-excitation methods secondary pressurized line 5 includes the first CVT self-excitation method secondary pressurizeds line 51 and the 2nd CVT self-excitation methods
Secondary pressurized line 52, the first CVT self-excitation method secondary pressurizeds line 51 connect the full-automatic anti-jamming dielectric loss tester 3
Low voltage experiment end and CVT8 the ends da, the 2nd CVT self-excitation method secondary pressurizeds line 52 connects full-automatic anti-interference Jie
The ground terminal of matter loss test instrument 3 and the ends dn of CVT8.
As seen from the above-described embodiment, the test for a kind of CVT capacitances dielectric loss and capacitance that the utility model embodiment provides
Device includes：Differential current sensor 1, band shielding p-wire 2, full-automatic anti-jamming dielectric loss tester 3, high-potting are surveyed
Line 4 and CVT self-excitation method secondary pressurizeds line 5 are tried, wherein：High pressure of 1 cramp joint of the differential current sensor in CVT8 drains end, institute
It states band shielding p-wire 2 and is separately connected the differential current sensor 1 and the full-automatic anti-jamming dielectric loss tester 3；
The high-potting p-wire 4 is separately connected Hi-pot test end and the CVT8 of the full-automatic anti-jamming dielectric loss tester 3
HV Terminal, the CV8T low-voltage terminal ground connection；The CVT self-excitation methods secondary pressurized line 5 includes the first CVT self-excitation methods two
Secondary pressurized line 51 and the 2nd CVT self-excitation method secondary pressurizeds line 52, the first CVT self-excitation method secondary pressurizeds line 51 connect described complete
The low voltage experiment end of Automatic Anti-interference dielectric loss tester 3 and the ends da of CVT8, the 2nd CVT self-excitation method secondary pressurized lines
52 connect the ends dn of the ground terminal and CVT8 of the full-automatic anti-jamming dielectric loss tester 3.Using differential current sensor 1
The electric current for acquiring CVT8 main capacitances, in conjunction with full-automatic anti-jamming dielectric loss tester can with the main capacitance of quick and precisely CVT and
Divide the capacitance and dielectric loss value of capacitance.
It is illustrated in figure 2 the test of the test device for a kind of CVT capacitances dielectric loss provided by the utility model and capacitance
Schematic diagram, C11 is the main capacitance of CVT8 in Fig. 2, and C2 is the derided capacitors of CVT8, and C11 and C2 are connected in series with.With the centre of CVT8
Transformer applies voltage as testing transformer, from secondary side and is carried out to it excitatory, and high pressure is induced as power supply in primary side
To measure the capacitance and dielectric loss value of CVT main capacitances C11 and derided capacitors C2.
When in-site measurement, carry out as follows：The high pressure for being connected to capacitance type potential transformer high pressure drainage end is drawn
Differential current sensing 1 is wrapped on capacitance type potential transformer high pressure drainage thread and hangs by being grounded 7 reliable grounds by streamline 6
It within hanging earthing conductor and fixes, differential current sensor 1 is shielded p-wire 2 by band is connected to full-automatic anti-interference medium damage
Tester 3 is consumed, capacitance type potential transformer tail end N is disengaged, high-potting p-wire 4, which is connected to full-automatic anti-interference medium, to be damaged
Consume tester 3；First CVT self-excitation method secondary pressurizeds line 51 and the 2nd CVT self-excitation method secondary pressurizeds line 52 are done from automatically anti-
Disturb secondary terminals da, dn that dielectric loss tester 3 is connected to capacitance type potential transformer.
Measurement method principle is as follows：When measuring CVT8 main capacitance C11, the electric current flowed through in main capacitance C11 is passed through into differential
The acquisition of current sensor 1 shields p-wire 2 by band and is transmitted to full-automatic anti-jamming dielectric loss tester 3, and derided capacitors
C2 connects with the standard capacitance of full-automatic anti-jamming dielectric loss tester 3 is used as test loop standard capacitance.Acquisition is tested back
Road electric current calculates automatically according to the standard capacitor-value of test loop electric current and full-automatic anti-jamming dielectric loss tester 3
Voltage in the standard capacitance of anti-jamming dielectric loss tester 3.According to 1 collected electric current of differential current sensor and calculating
Voltage in the standard capacitance of obtained full-automatic anti-jamming dielectric loss tester 3 obtains capacitance and Jie of main capacitance C11
Damage value.
It when measuring derided capacitors C2, uses and has determined capacitance, the C11 of dielectric loss value is measured as standard capacitance, together
Reason obtains the capacitance and dielectric loss value of derided capacitors C2.Because of the standard electric of full-automatic anti-jamming dielectric loss tester 3 in test
The capacitance of appearance is much smaller than the capacitance of branch pressure voltage C2, and the standard capacitance that C2 is connected with Cn as test loop ties test
Fruit influences can be ignored.The method allows testing crew in the feelings without removing capacitance type potential transformer high pressure drainage thread
The main capacitance of CVT and the dielectric loss of derided capacitors and capacitance are accurately and rapidly tested under condition.
By the above-mentioned CVT capacitances dielectric loss of the utility model embodiment and the test method of capacitance, without remove with
In the case of the high pressure drainage thread of CVT, you can fast and accurately test the capacitance and dielectric loss of CVT main capacitances and derided capacitors
Value.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Above-described the utility model embodiment does not constitute the restriction to scope of protection of the utility model.
Claims (4)
1. the test device of a kind of CVT capacitances dielectric loss and capacitance, which is characterized in that including：Differential current sensor (1), band
It is secondary to shield p-wire (2), full-automatic anti-jamming dielectric loss tester (3), high-potting p-wire (4) and CVT self-excitation methods
Pressurized line (5), wherein：
Differential current sensor (1) cramp joint drains end in the high pressure of CVT, and the band shielding p-wire (2) is separately connected institute
State differential current sensor (1) and the full-automatic anti-jamming dielectric loss tester (3)；The high-potting p-wire (4)
It is separately connected the HV Terminal at the Hi-pot test end and CVT of the full-automatic anti-jamming dielectric loss tester (3), the CVT
Low-voltage terminal ground connection；The CVT self-excitation methods secondary pressurized line (5) includes the first CVT self-excitation method secondary pressurized lines (51) and the
Two CVT self-excitation method secondary pressurized lines (52), the first CVT self-excitation method secondary pressurized lines (51) connection are described full-automatic anti-interference
The low voltage experiment end of dielectric loss tester (3) and the ends da of CVT, the 2nd CVT self-excitation method secondary pressurized lines (52) connection
The ends dn of the ground terminal and CVT of the full-automatic anti-jamming dielectric loss tester (3).
2. the test device of CVT capacitances dielectric loss according to claim 1 and capacitance, which is characterized in that the differential electricity
Flow sensor (1) is loop coil of the uniform winding on nonferromugnetic material, and output signal is the product of Current versus time
Point.
3. the test device of CVT capacitances dielectric loss according to claim 1 or 2 and capacitance, which is characterized in that the height of CVT
Pressure drainage end connects high pressure drainage conducting wire (6), and the differential current sensor (1) is connected with high pressure drainage conducting wire (6)
It connects.
4. the test device of CVT capacitances dielectric loss according to claim 3 and capacitance, which is characterized in that the high pressure is drawn
Conductance line (6) is provided with a ground wire (7), and described ground wire (7) one end is connect with high pressure drainage conducting wire (6), the other end
Ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820065036.1U CN207798953U (en) | 2018-01-16 | 2018-01-16 | A kind of test device of CVT capacitances dielectric loss and capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820065036.1U CN207798953U (en) | 2018-01-16 | 2018-01-16 | A kind of test device of CVT capacitances dielectric loss and capacitance |
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| CN207798953U true CN207798953U (en) | 2018-08-31 |
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ID=63271152
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| CN201820065036.1U Active CN207798953U (en) | 2018-01-16 | 2018-01-16 | A kind of test device of CVT capacitances dielectric loss and capacitance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169575A (en) * | 2018-01-16 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | The test device and method of a kind of CVT capacitances dielectric loss and capacitance |
| CN110749849A (en) * | 2019-10-15 | 2020-02-04 | 国网山东省电力公司淄博供电公司 | Capacitance voltage transformer dielectric loss and capacitance testing system and method |
-
2018
- 2018-01-16 CN CN201820065036.1U patent/CN207798953U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169575A (en) * | 2018-01-16 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | The test device and method of a kind of CVT capacitances dielectric loss and capacitance |
| CN108169575B (en) * | 2018-01-16 | 2020-07-17 | 云南电网有限责任公司电力科学研究院 | Method for testing dielectric loss and capacitance of CVT capacitor |
| CN110749849A (en) * | 2019-10-15 | 2020-02-04 | 国网山东省电力公司淄博供电公司 | Capacitance voltage transformer dielectric loss and capacitance testing system and method |
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