CN207650380U - A kind of high voltage direct current divider second divided voltage board parameter calibration equipment - Google Patents
A kind of high voltage direct current divider second divided voltage board parameter calibration equipment Download PDFInfo
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- CN207650380U CN207650380U CN201721489772.1U CN201721489772U CN207650380U CN 207650380 U CN207650380 U CN 207650380U CN 201721489772 U CN201721489772 U CN 201721489772U CN 207650380 U CN207650380 U CN 207650380U
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Abstract
A kind of high voltage direct current divider second divided voltage board parameter calibration equipment, it include the DC constant voltage source for generating DC voltage needed for verification, the first current transformer for measuring the DC constant voltage source output current, the second current transformer for measuring second divided voltage plate input current, first voltage mutual inductor for measuring DC voltage between second divided voltage plate input terminal, first variable resistance of the low-voltage arm resistance for Equivalent DC divider, second voltage mutual inductor for measuring DC voltage between second divided voltage plate leading-out terminal, third current transformer for measuring second divided voltage plate output current, the second adjustable resistance of optical-electric module internal resistance for Equivalent DC divider.Advantage is, can second divided voltage plate input and output resistance, no-load voltage ratio under correct analog DC divider physical cabling mode, be conducive to verify second divided voltage plate characterisitic parameter, find second divided voltage board defect in time, there is great economic benefit.
Description
Technical field
The utility model is related to straight-flow system voltage measurement field more particularly to a kind of divider second divided voltage plates
Parameter calibrator.
Background technology
Divider is important in ultra-high voltage converter station and core voltage monitoring equipment, and function is to realize current conversion station
The real-time monitoring of DC voltage, and monitoring result is fed back into DC control system, it influences and determines the control of DC engineering
Preservation tactics processed and the method for operation.Divider once breaks down, and straight-flow system monopole is gently then caused to be latched, heavy then cause
Entire DC transmission system is stopped transport, and will be dramatically increased the operation risk of power grid and may be brought huge economic loss.
Divider generally comprises ontology, second divided voltage plate and photoelectric conversion module.Ontology is by height pressure arm resistance, electricity
Hold composition, is packaged in SF6 dielectrics, the probability of failure is relatively low, and second divided voltage plate and photoelectric conversion module are general
It in terminal box, is influenced by live weather, mechanical shock, it is easy to desoldering, broken string of electronic component etc. occur and ask
Topic will make the no-load voltage ratio of divider change once problem above occurs, and cause DC voltage measurement inaccurate, may
Cause protection misoperation.
The parameter verification of divider generally detaches ontology with partial pressure plate at present, independent measurement height pressure arm resistance,
Second divided voltage plate input and output resistance, has differences with delivery test method, causes test result without comparison, be unable to judge accurately
Whether the parameter of second divided voltage plate meets the requirements.Therefore it is a kind of for examining divider second divided voltage board parameter it is necessary to research and develop
Device.
Utility model content
The utility model, which overcomes divider second divided voltage plate, can not carry out whole school in the case where disassembling
The defect tested provides the test device that a kind of analog DC divider physical cabling mode verifies second divided voltage board parameter.
The utility model is achieved through the following technical solutions：
A kind of high voltage direct current divider second divided voltage board parameter calibration equipment, the second divided voltage plate are used for direct current point
The low-voltage arm both end voltage of depressor carries out secondary no-load voltage ratio, and the calibration equipment includes for generating DC voltage needed for verification
DC constant voltage source, the first current transformer for measuring the DC constant voltage source output current, for measuring second divided voltage
Second current transformer of plate input current, the first voltage mutual inductance for measuring DC voltage between second divided voltage plate input terminal
Device, the first variable resistance of the low-voltage arm resistance for Equivalent DC divider, for measuring between second divided voltage plate leading-out terminal
The second voltage mutual inductor of DC voltage, the third current transformer for measuring second divided voltage plate output current, for equivalent
The second adjustable resistance of the optical-electric module internal resistance of divider.
Further include controlling the first control switch K1, the second control switch K2, third to control and open as the improvement of said program
Close K3；The DC constant voltage source, the first control switch K1, the first current transformer, the second current transformer connect after with two
A input terminal is in parallel, first variable resistance with second control after switch K2 connects with DC constant voltage source, the
One control switch K1, the first current transformer are in parallel；The first voltage mutual inductor is in parallel with the input terminal described in two；
The second adjustable resistance, third control switch K3, third current transformer connect after with the leading-out terminal described in two simultaneously
Connection, the second voltage mutual inductor are in parallel with the leading-out terminal described in two.
As the improvement of said program, the resistance value ranging from 10K Ω to 10M Ω of the first variable resistance, second can power transformation
The resistance value of resistance ranging from 100k Ω to 1M Ω.
A kind of high voltage direct current divider second divided voltage board parameter method of calibration, the second divided voltage plate are used for direct current point
The low-voltage arm both end voltage of depressor carries out secondary no-load voltage ratio, includes the DC constant voltage source for generating DC voltage needed for verification, uses
In the first current transformer for measuring the DC constant voltage source output current, for measuring second divided voltage plate input current
Two current transformers, the first voltage mutual inductor for measuring DC voltage between second divided voltage plate input terminal, for equivalent straight
First variable resistance of the low-voltage arm resistance of flow point depressor, second for measuring DC voltage between second divided voltage plate leading-out terminal
Voltage transformer, the third current transformer for measuring second divided voltage plate output current are used for the light of Equivalent DC divider
The second adjustable resistance of electric module internal resistance, is as follows：
Step 1, the low-voltage arm actual resistance R according to high voltage direct current dividerLow-voltage arm, adjust the first variable resistance R1=
RLow-voltage arm；
Step 2, according to second divided voltage plate access photoelectric conversion module quantity and internal resistance RInternal resistance, adjust the second adjustable resistance
Access quantity, and adjust the second adjustable resistance R2=RInternal resistance；
Step 3 slowly increases DC constant voltage source voltage, makes first voltage mutual inductor registration UinIt is specified defeated with second divided voltage plate
It is equal to enter voltage；Read the first current transformer electric current registration Iin, the second current transformer electric current registration I2；Read second voltage
The voltage readings U of mutual inductorout, third current transformer electric current registration Iout；
Step 4, the input resistance R for extracting second divided voltage plateinWith output resistance Rout：
Step 5, the no-load voltage ratio k for extracting second divided voltage plate：
Step 6, the reliability for judging high voltage direct current divider second divided voltage plate, determination method are：When meeting following condition
For the moment, the second divided voltage plate of divider should be replaced：Input resistance RinWith output resistance RoutCompared with factory-said value, variation
More than 0.2%；No-load voltage ratio k changes compared with factory-said value more than 0.2%.
The utility model has the advantages that：It can be secondary point under correct analog DC divider physical cabling mode
Pressing plate input and output resistance, no-load voltage ratio are conducive to verify second divided voltage plate characterisitic parameter, find second divided voltage board defect, tool in time
There is great economic benefit.
Description of the drawings
Fig. 1 is the structure principle chart of the calibration equipment of the utility model.
Specific implementation mode
Embodiment 1
As shown in Figure 1, a kind of high voltage direct current divider second divided voltage board parameter calibration equipment, the second divided voltage plate 1
For the low-voltage arm both end voltage of divider to be carried out secondary no-load voltage ratio, the calibration equipment includes for generating verification institute
The DC constant voltage source 2 for needing DC voltage, the first current transformer 3 for measuring 2 output current of DC constant voltage source are used
In the second current transformer 4 for measuring 1 input current of second divided voltage plate, for measuring direct current between 1 input terminal of second divided voltage plate
The first voltage mutual inductor 5 of voltage, the first variable resistance 6 of the low-voltage arm resistance for Equivalent DC divider, for measuring
The second voltage mutual inductor 7 of DC voltage between 1 leading-out terminal of second divided voltage plate, for measuring 1 output current of second divided voltage plate
Third current transformer 8, the second adjustable resistance 9 of the optical-electric module internal resistance for Equivalent DC divider, the first control switch
K1, the second control switch K2, third control switch K3；It is mutual that the DC constant voltage source 2, first controls switch K1, the first electric current
First variable resistance 6 and second in parallel with the input terminal described in two, described after sensor 3, the series connection of the second current transformer 4
It controls in parallel with the control switch K1 of DC constant voltage source 2, first, the first current transformer 3 after switch K2 connects；First electricity
Press mutual inductor 5 in parallel with the input terminal described in two；The second adjustable resistance 9, third control switch K3, third electric current
Mutual inductor 8 is in parallel with the leading-out terminal described in two after connecting, the output end described in the second voltage mutual inductor 7 and two
It is sub in parallel.The resistance value of first variable resistance 6 ranging from 10K Ω to 10M Ω, the resistance value of the second adjustable resistance 9 is ranging from
100k Ω to 1M Ω.
Embodiment 2
A kind of 1 parameter verification method of high voltage direct current divider second divided voltage plate, the second divided voltage plate 1 are used for direct current
The low-voltage arm both end voltage of divider carries out secondary no-load voltage ratio, as shown in Figure 1, including for generating the straight of DC voltage needed for verification
Constant pressure source 2 is flowed, the first current transformer 3 for measuring 2 output current of DC constant voltage source, for measuring second divided voltage
Second current transformer 4 of 1 input current of plate, the first voltage for measuring DC voltage between 1 input terminal of second divided voltage plate
Mutual inductor 5, the first variable resistance 6 of the low-voltage arm resistance for Equivalent DC divider are exported for measuring second divided voltage plate 1
The second voltage mutual inductor 7 of DC voltage between terminal, the third current transformer 8 for measuring 1 output current of second divided voltage plate,
The second adjustable resistance 9 of optical-electric module internal resistance for Equivalent DC divider, is as follows：
Step 1, the low-voltage arm actual resistance R according to high voltage direct current dividerLow-voltage arm, adjust the first variable resistance 6, R1=
RLow-voltage arm；
Step 2, according to second divided voltage plate 1 access photoelectric conversion module quantity and internal resistance RInternal resistance, adjust the second adjustable resistance
9 access quantity, and adjust the second adjustable resistance 9, R2=RInternal resistance；
Step 3 slowly increases 2 voltage of DC constant voltage source, makes 5 registration U of first voltage mutual inductorinWith 1 volume of second divided voltage plate
It is equal to determine input voltage；Read 3 electric current registration I of the first current transformerin, 4 electric current registration I of the second current transformer2；Read the
The voltage readings U of two voltage transformers 7out, third current transformer 8 electric current registration Iout；
The input resistance R of step 4, extraction second divided voltage plate 1inWith output resistance Rout：
The no-load voltage ratio k of step 5, extraction second divided voltage plate 1：
The reliability of step 6, judgement high voltage direct current divider second divided voltage plate 1, determination method are：When meeting following condition
For the moment, the second divided voltage plate 1 of divider should be replaced：Input resistance RinWith output resistance RoutCompared with factory-said value, variation
More than 0.2%；No-load voltage ratio k changes compared with factory-said value more than 0.2%.
Above-listed detailed description is illustrating for the utility model possible embodiments, which is not to limit
The scope of the claims of the utility model, all equivalence enforcements or change without departing from carried out by the utility model are intended to be limited solely by this case
In the scope of the claims.
Claims (3)
1. a kind of high voltage direct current divider second divided voltage board parameter calibration equipment, the second divided voltage plate is used for DC partial voltage
The low-voltage arm both end voltage of device carries out secondary no-load voltage ratio, which is characterized in that includes the direct current for generating DC voltage needed for verification
Constant pressure source, the first current transformer for measuring the DC constant voltage source output current are defeated for measuring second divided voltage plate
The second current transformer for entering electric current, the first voltage mutual inductor for measuring DC voltage between second divided voltage plate input terminal,
First variable resistance of the low-voltage arm resistance for Equivalent DC divider, for measuring direct current between second divided voltage plate leading-out terminal
The second voltage mutual inductor of voltage, the third current transformer for measuring second divided voltage plate output current are used for Equivalent DC
The second adjustable resistance of the optical-electric module internal resistance of divider.
2. a kind of high voltage direct current divider second divided voltage board parameter calibration equipment according to claim 1, which is characterized in that
Further include the first control switch of control K1, the second control switch K2, third control switch K3；
The DC constant voltage source, the first control switch K1, the first current transformer, the second current transformer connect after with two
The input terminal is in parallel, first variable resistance with second control after switch K2 connects with DC constant voltage source, first
It is in parallel to control switch K1, the first current transformer；The first voltage mutual inductor is in parallel with the input terminal described in two；Institute
The second adjustable resistance, third control switch K3, the third current transformer stated are in parallel with the leading-out terminal described in two after connecting,
The second voltage mutual inductor is in parallel with the leading-out terminal described in two.
3. according to a kind of high voltage direct current divider second divided voltage board parameter calibration equipment as claimed in claim 1 or 2, feature exists
In the resistance value ranging from 10K Ω to 10M Ω of the first variable resistance, the resistance value ranging from 100k Ω of the second adjustable resistance are extremely
1MΩ。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721489772.1U CN207650380U (en) | 2017-11-08 | 2017-11-08 | A kind of high voltage direct current divider second divided voltage board parameter calibration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721489772.1U CN207650380U (en) | 2017-11-08 | 2017-11-08 | A kind of high voltage direct current divider second divided voltage board parameter calibration equipment |
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| CN207650380U true CN207650380U (en) | 2018-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748345A (en) * | 2017-11-08 | 2018-03-02 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of HVDC divider second divided voltage board parameter calibration equipment and method |
-
2017
- 2017-11-08 CN CN201721489772.1U patent/CN207650380U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748345A (en) * | 2017-11-08 | 2018-03-02 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of HVDC divider second divided voltage board parameter calibration equipment and method |
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