CN207571186U - A kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type - Google Patents
A kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type Download PDFInfo
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- CN207571186U CN207571186U CN201721394434.XU CN201721394434U CN207571186U CN 207571186 U CN207571186 U CN 207571186U CN 201721394434 U CN201721394434 U CN 201721394434U CN 207571186 U CN207571186 U CN 207571186U
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Abstract
The utility model provides a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type, including three-phase voltage feeder line, voltage feeders access a phase divider capacitance-resistance high-voltage arm described in per phase, the cold end parallel connection access secondary RC divider of one phase voltage of the phase divider capacitance-resistance high-voltage arm and a secondary RC divider of residual voltage, the low spot position end of the secondary RC divider of the phase voltage and the secondary RC divider of residual voltage is connected with earth mat, it is two capacitance-resistance high-voltage arms to be used to be needed to be reduced to one existing product, the manufacture cost close to 30% can be saved compared with existing product；The beneficial effects of the utility model second is that the volume of existing product is made to reduce close to 30%, it is easier to be packed into the inner space of original power equipment, be easy to implement the fusion of primary and secondary equipment.
Description
Technical field
The utility model is related to field of electrical equipment more particularly to a kind of three facies tract zero sequence alternating voltage of resistance-capacitance differential pressure type to pass
Sensor.
Background technology
Three-phase alternating current pressure sensor is largely used to 10kV and 20kV power distribution networks, they are opened on distribution feeder, column
On the power equipments such as pass, switchgear, metering cabinet, reactive power compensator, load control unit.Up to the present, 10kV and 20kV
Most of AC voltage sensor that power distribution network uses is 10kV electromagnetic potential transformers, and operation principle is in closed core
The first winding and secondary winding of insulated conductor coiling mutual insulating are used on magnetic circuit, by electromagnetic induction an alternating current buckling
Change the secondary alternating voltage directly proportional to the secondary winding number of turn and the first winding number of turn into, the voltage transformer of this structure is by electricity
Electromagnetic type voltage transformer standard GB/T 20840.3-2013 manufacture, secondary voltage output rated value for 100V, 100V/ √ 3 with
And 100V/3.Wherein the voltage output of 100V/3 exports residual voltage by open-delta connection.
China's power distribution network is carrying out intellectualized reconstruction, it is proposed that the requirement of one or two fusions of power distribution network power equipment.Match
The traditional power equipment of power grid such as distribution transformer, high-voltage switch gear and breaker, high-voltage electric-energy meter, reactive-load compensation dress
Put, line feed terminals (FTU) are required that Current Voltage sensor, digital processing unit and digital communication module is configured, product is by i.e.
Plug-and-play mode manufactures and designs, these power equipments is made also to access internet while power network is accessed.Electromagnetic potential is mutual
Sensor is big due to the scale of construction, it is difficult to be packed into existing power equipment, while the secondary output load of electromagnetic potential transformer is electronics
Circuit is not needed to provide power, the wave of electric power resource can be caused using electromagnetic potential transformer as AC voltage sensor
Take.With electronic type voltage transformer standard GB/T 20840.7- 2007 and non-traditional mutual inductor standard DL/T1155-
2012 promulgate and enforce, and electronic type voltage transformer and non-traditional voltage transformer are also used on 10kV and 20kV power distribution networks.Electricity
When the output of minor voltage transformer is analog quantity, secondary voltage output rated value 1.625V, 2V, 3.25V, 4V, 6.5V, with
And 1.625V/ √ 3,2V/ √ 3,3.25V/ √ 3,4V/ √ 3,6.5V/ √ 3.The secondary voltage output of non-traditional voltage transformer
Rated value is 2V and 4V and 2V/ √ 3 and 4V/ √ 3.One or two fusion engineering uses of 10kV and 20kV power distribution networks at present are most general
Time AC voltage sensor using RC divider structure, set respectively by three-phase voltage sensor and residual voltage sensor
Meter, combines them into three facies tract zero sequence AC voltage sensors when necessary.
Fig. 1 is the three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type of manufacture, is needed per phase voltage using two resistances
Hold divider, one is used for the secondary output of phase voltage, and another exports for zero sequence secondary voltage.Manufacture the exchange of this structure
During sensor, the capacitance-resistance high-voltage arm being composed of high-voltage capacitance and high-tension resistive is the main production cost of product.Except this it
Two RC dividers are packed into an external insulating sleeve, the volume of insulating sleeve is than being only packed into a RC divider
Insulating sleeve volume dramatically increase, be just difficult to pack into the inner space of original power equipment in many cases.
Utility model content
The purpose of this utility model is that in view of the above shortcomings of the prior art, provide a kind of three facies tract of resistance-capacitance differential pressure type
Zero sequence AC voltage sensor, volume are reduced close to 30%, it is easier to be packed into the inner space of original power equipment.
To achieve the above object, the utility model employs following technical solution：
The utility model provides a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type, is presented including three-phase voltage
Line, voltage feeders access a phase divider capacitance-resistance high-voltage arm, the low potential of the phase divider capacitance-resistance high-voltage arm described in per phase
The secondary RC divider of end one phase voltage of access in parallel and a secondary RC divider of residual voltage, the phase voltage are secondary
The low spot position end of RC divider and the secondary RC divider of residual voltage is connected with earth mat.
Further, the secondary RC divider of the phase voltage is by the secondary capacitance-resistance high-voltage arm of phase voltage and the secondary capacitance-resistance of phase voltage
Low-voltage arm is connected in series；The secondary RC divider of residual voltage is by the secondary capacitance-resistance high-voltage arm of residual voltage and residual voltage two
Secondary capacitance-resistance low-voltage arm is connected in series.
Further, three it is combined after, export secondary phase from the both ends of three secondary capacitance-resistance low-voltage arms of phase voltage respectively
Voltage.
Further, three it is combined after, the secondary capacitance-resistance low-voltage arms of three residual voltages are in parallel, and the residual voltage is secondary
The both ends of capacitance-resistance low-voltage arm export secondary residual voltage.
Further, three secondary capacitance-resistance low-voltage arms of residual voltage can be combined into one.
Further, the secondary capacitance-resistance high-voltage arm of the phase voltage is by the capacitance of 33nF and the resistor coupled in parallel of 491.4M Ω；It is described
The secondary capacitance-resistance low-voltage arm of phase voltage is by the capacitance of 960nF and the resistor coupled in parallel of 49k Ω；The secondary capacitance-resistance high-voltage arm of residual voltage
By the resistor coupled in parallel of the capacitance and 310k Ω of 15nF；The secondary capacitance-resistance low-voltage arm of residual voltage is by the capacitance of 650nF and the electricity of 72k Ω
Resistance is in parallel.
Further, the phase divider capacitance-resistance high-voltage arm, the secondary capacitance-resistance high-voltage arm of phase voltage and the secondary capacitance-resistance of residual voltage
Capacitance sexual deviation consistent with resistance in high-voltage arm is controlled within 1%.
The utility model also provides a kind of adjustment method of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type, including
Following steps：
1) first step is zero sequence secondary voltage terminal d-n short circuits, phase divider secondary voltage terminal a-n, b-n, c-
N accesses rated sencondaryload, and the primary voltage terminal of a wherein phase and ground terminal N apply test voltage on testboard, separately
The primary voltage terminal ground of two-phase measures the phase voltage error for applying voltage phase, and the phase divider of phase is measured by adjustment
Capacitance-resistance low-voltage arm parameter makes phase voltage error be no more than the 1/3 of error limit；
2) adjustment is carried out to the phase divider capacitance-resistance low-voltage arm parameter of other two-phases according to step 1)；Then residual voltage two
Secondary voltage terminal d-n accesses rated sencondaryload, and phase divider secondary voltage terminal a-n, b-n, c-n access are specified secondary
Load, primary voltage terminal A, B, C of three-phase are in parallel, and the primary voltage terminal and N to three-phase on testboard apply experiment electricity
Pressure measures the secondary voltage error of each phase successively；The zero sequence error that result is known as phase voltage is measured, property is additive error；
3) adjustment is carried out to zero sequence pressure divider circuit, zero sequence secondary voltage terminal d-n access rated sencondaryloads mutually divide
Device secondary voltage terminal a-n, b-n, c-n access rated sencondaryload, and primary voltage terminal A, B, C of three-phase are in parallel, to surveying
The primary voltage terminal of three-phase and N apply test voltage in test stand, and adjustment zero sequence divider capacitance-resistance low-voltage arm parameter makes zero sequence electric
Hold up difference is no more than allowable error 1/3；Then secondary load and the error measure circuit for keeping access are constant, on testboard
The primary voltage terminal and N of a wherein phase apply test voltage, and a terminal ground of another two-phase measures zero sequence secondary voltage and misses
Difference；It measures and is carried out respectively when A, B, C respectively mutually apply test voltage；The three-phase voltage error that result is known as residual voltage is measured,
Property is additive error.
The beneficial effects of the utility model are：It is two capacitance-resistance high-voltage arms to be used to be needed to be reduced to one existing product
Branch, can save the manufacture cost close to 30% compared with existing product.The beneficial effects of the utility model second is that making existing
The volume of product is reduced close to 30%, it is easier to is packed into the inner space of original power equipment, is easy to implement primary and secondary set
Standby fusion.
Description of the drawings
Fig. 1 is the circuit theory schematic diagram of existing three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type；
Fig. 2 is the circuit theory schematic diagram of the three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type of the utility model；
Fig. 3 is the circuit theory schematic diagram of error measure and debugging.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with the accompanying drawings and implement
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
Referring to Fig. 2, a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type, including three-phase voltage feeder line 1, often
Voltage feeders 1 described in phase access a phase divider capacitance-resistance high-voltage arm 2, the cold end of the phase divider capacitance-resistance high-voltage arm 2
The parallel connection access secondary RC divider of one phase voltage and a secondary RC divider of residual voltage, the secondary resistance of phase voltage
The low spot position end for holding divider and the secondary RC divider of residual voltage is connected with earth mat.
The secondary RC divider of phase voltage is by the secondary capacitance-resistance high-voltage arm 11 of phase voltage and the secondary capacitance-resistance low pressure of phase voltage
Arm 3 is connected in series；The secondary RC divider of residual voltage is by the secondary capacitance-resistance high-voltage arm 13 of residual voltage and residual voltage two
Secondary capacitance-resistance low-voltage arm 7 is connected in series.
After three is combined, secondary phase voltage is exported from the both ends of three secondary capacitance-resistance low-voltage arms 3 of phase voltage respectively.
After three is combined, three secondary capacitance-resistance low-voltage arms 7 of residual voltage are in parallel, and the secondary capacitance-resistance of residual voltage is low
The both ends of pressure arm 7 export secondary residual voltage.
Three secondary capacitance-resistance low-voltage arms 7 of residual voltage can be combined into one.
The secondary capacitance-resistance high-voltage arm 11 of phase voltage is by the capacitance of 33nF and the resistor coupled in parallel of 491.4M Ω；The phase voltage
Secondary capacitance-resistance low-voltage arm 3 is by the capacitance of 960nF and the resistor coupled in parallel of 49k Ω；The secondary capacitance-resistance high-voltage arm 13 of residual voltage by
The capacitance of 15nF and the resistor coupled in parallel of 310k Ω；The secondary capacitance-resistance low-voltage arm 7 of residual voltage is by the capacitance of 650nF and the electricity of 72k Ω
Resistance is in parallel.
The phase divider capacitance-resistance high-voltage arm 2, the secondary capacitance-resistance high-voltage arm 11 of phase voltage and the secondary capacitance-resistance high pressure of residual voltage
Capacitance sexual deviation consistent with resistance in arm 13 is controlled within 1%.
The actual error of voltage sensor needs the adjustment on testboard, and Fig. 3 is product error measure and capacitance-resistance parameter tune
Try the circuit theory schematic diagram used.In figure AC power 14 access testing transformer 15 a low pressure winding, it is secondary around
Group can export 0~10kV alternating voltages, be applied to the first winding A-X of the voltage ratio standard 16 of 0.02 grade of accuracy
On the A-N terminals of terminal and AC voltage sensor product 17.The secondary of voltage ratio standard supplies electric winding a-x ends
Son is connect with the sub- Up-0 of the reference voltage input terminal of AC potentiometer 18, and the reference voltage inputted from Up-0 is in K-D circuits
Generate exchange elementary errors voltage.The secondary ratio winding a0-x0 of voltage ratio standard and 17 secondary voltage terminal of voltage sensor
A-n is connected in series with by subtractive polarity, and the difference voltage that voltage obtains after subtracting each other is serially connected in the K-D circuits of AC potentiometer.It should
In circuit, difference voltage, power frequency galvanometer are composed in series closed circuit with exchanging micro differential source, and adjusting elementary errors power supply output can
Make galvanometer nulling.In the case where loop current is nought state, the indicating value of micro differential source means that difference voltage is corresponding relative to reference
The amplitude percentage of voltage and phase angle.
A kind of adjustment method of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type is as follows：
Debugging is carried out in two steps, and the first step mutually divides the zero sequence secondary voltage terminal d-n short circuits of Fig. 2 infrastructure products
Device secondary voltage terminal a-n, b-n, c-n access rated sencondaryload, by the primary voltage end of Fig. 3 circuits phase wherein
Son and ground terminal N apply test voltage, the primary voltage terminal ground of another two-phase, and the phase voltage for measuring application voltage phase is missed
Difference.The phase divider capacitance-resistance low-voltage arm parameter of phase is measured by adjustment, phase voltage error is made to be no more than the 1/3 of error limit.
Adjustment is carried out to the phase divider capacitance-resistance low-voltage arm parameter of other two-phases according to similary step.Then zero sequence secondary voltage terminal d-n
Access rated sencondaryload, phase divider secondary voltage terminal a-n, b-n, c-n access rated sencondaryloads, the one of three-phase
Secondary voltage terminal A, B, C are in parallel, apply test voltage to the primary voltage terminal and N of three-phase by Fig. 3 circuits, measure each phase successively
Secondary voltage error.The zero sequence error that result is known as phase voltage is measured, property is additive error.It should be this error during design
Control is at 3P grades.The zero sequence error of phase voltage is about -2% in embodiment, meets 3P step voltage transformer requests.
Second step is that adjustment is carried out to zero sequence pressure divider circuit, zero sequence secondary voltage terminal d-n access rated sencondaryloads,
Phase divider secondary voltage terminal a-n, b-n, c-n access rated sencondaryload, and primary voltage terminal A, B, C of three-phase are simultaneously
Connection applies the primary voltage terminal and N of three-phase test voltage by Fig. 3 circuits, adjustment zero sequence divider capacitance-resistance low-voltage arm parameter,
Residual voltage error is made to be no more than the 1/3 of allowable error.Then secondary load and the error measure circuit for keeping access are constant, press
The primary voltage terminal of a phase and N apply test voltage to Fig. 3 circuits wherein, and a terminal ground of another two-phase measures zero sequence
Secondary voltage error.It measures and is carried out respectively when A, B, C respectively mutually apply test voltage.Measure the three-phase that result is known as residual voltage
Voltage error, property are additive error.It should make triphase parameter symmetrical as possible during manufacture, each phase be applied control errors during voltage
At 3P grades.The three-phase voltage error of residual voltage is no more than 1% in embodiment, meets 3P step voltage transformer requests.
Embodiment described above only expresses the embodiment of the utility model, and description is more specific and detailed, but simultaneously
Cannot the limitation to the utility model patent range therefore be interpreted as.It should be pointed out that the ordinary skill for this field
For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this
The protection domain of utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (7)
1. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type, it is characterised in that：Including three-phase voltage feeder line (1),
Voltage feeders (1) access a phase divider capacitance-resistance high-voltage arm (2) described in per phase, the phase divider capacitance-resistance high-voltage arm (2)
Cold end parallel connection accesses the secondary RC divider of a phase voltage and a secondary RC divider of residual voltage, the phase electricity
The low spot position end of secondary RC divider and the secondary RC divider of residual voltage is pressed to be connected with earth mat.
2. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type according to claim 1, it is characterised in that：Institute
The secondary RC divider of phase voltage is stated to be connected by the secondary capacitance-resistance high-voltage arm (11) of phase voltage and the secondary capacitance-resistance low-voltage arm (3) of phase voltage
It forms；The secondary RC divider of residual voltage is by the secondary capacitance-resistance high-voltage arm (13) of residual voltage and the secondary capacitance-resistance of residual voltage
Low-voltage arm (7) is connected in series.
3. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type according to claim 2, it is characterised in that：Three
After combined, secondary phase voltage is exported from the both ends of three secondary capacitance-resistance low-voltage arms (3) of phase voltage respectively.
4. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type according to claim 2, it is characterised in that：Three
After combined, three secondary capacitance-resistance low-voltage arms (7) of residual voltage are in parallel, the secondary capacitance-resistance low-voltage arm (7) of residual voltage
Both ends export secondary residual voltage.
5. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type according to claim 2, it is characterised in that：Three
The secondary capacitance-resistance low-voltage arm (7) of Zhi Suoshu residual voltages can be combined into one.
6. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type according to claim 2, it is characterised in that：Institute
The secondary capacitance-resistance high-voltage arm (11) of phase voltage is stated by the capacitance of 33nF and the resistor coupled in parallel of 491.4M Ω；The secondary capacitance-resistance of phase voltage
Low-voltage arm (3) is by the capacitance of 960nF and the resistor coupled in parallel of 49k Ω；The secondary capacitance-resistance high-voltage arm (13) of residual voltage is by 15nF
Capacitance and 310k Ω resistor coupled in parallel；The secondary capacitance-resistance low-voltage arm (7) of residual voltage is by the capacitance of 650nF and the resistance of 72k Ω
It is in parallel.
7. a kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type according to claim 2, it is characterised in that：Institute
State the secondary capacitance-resistance high-voltage arm (11) of phase divider capacitance-resistance high-voltage arm (2), phase voltage and the secondary capacitance-resistance high-voltage arm (13) of residual voltage
In consistent with resistance the sexual deviation of capacitance control within 1%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721394434.XU CN207571186U (en) | 2017-10-26 | 2017-10-26 | A kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721394434.XU CN207571186U (en) | 2017-10-26 | 2017-10-26 | A kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type |
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| Publication Number | Publication Date |
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| CN207571186U true CN207571186U (en) | 2018-07-03 |
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| CN201721394434.XU Expired - Fee Related CN207571186U (en) | 2017-10-26 | 2017-10-26 | A kind of three facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254190A (en) * | 2018-11-20 | 2019-01-22 | 江苏思源赫兹互感器有限公司 | A kind of residual voltage sensor based on capacitance partial pressure |
-
2017
- 2017-10-26 CN CN201721394434.XU patent/CN207571186U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254190A (en) * | 2018-11-20 | 2019-01-22 | 江苏思源赫兹互感器有限公司 | A kind of residual voltage sensor based on capacitance partial pressure |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180703 Termination date: 20211026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |