CN109270319A - A kind of multi-tap voltage transformer and its production, adjustment method - Google Patents
A kind of multi-tap voltage transformer and its production, adjustment method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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Abstract
The present invention relates to a kind of multi-tap voltage transformer, solve the problems, such as that existing voltage transformer has debugging complexity, higher cost, is unfavorable for mass production and stability is difficult to improve.In the voltage transformer, resitstance voltage divider includes high-voltage arm resistance R1, the first low-voltage arm resistance R2, the second low-voltage arm resistance R3；High-voltage arm resistance R1First end connect with high voltage transmission line, high-voltage arm resistance R1Second end and the first low-voltage arm resistance R2First end connection, the first low-voltage arm resistance R2Second end and the second low-voltage arm resistance R3First end connection, the second low-voltage arm resistance R3Second end ground connection；Adjusting unit includes that amplitude adjusts circuit and phase compensating circuit；Second low-voltage arm resistance R3Both ends connection amplitude adjust circuit；First low-voltage arm resistance R2First end and the second low-voltage arm resistance R3Second end connection phase compensating circuit or phase compensating circuit be connected to the second low-voltage arm resistance R3Both ends.
Description
Technical field
The present invention relates to voltage transformer fields, and in particular to a kind of multi-tap voltage transformer and its production, debugging side
Method.
Background technique
Voltage transformer is the critical elements that voltage measurement is used in electric system, and accuracy of measurement and reliability are to electricity
Force system is safe and stable and economical operation has important influence.Electromagnetic potential transformer, electricity are mainly used in electric system
Electromagnetic type voltage transformer has the advantages such as measurement accuracy height, manufacturing process maturation, method of inspection specification in the linear range.But by
The limitation of electromagnetic transformer mechanism, electromagnetic potential transformer is big with volume, dynamic range is small, is easy to happen ferromagnetic resonance
The disadvantages of so as to cause overvoltage and output terminal shortcircuit.On the other hand, with Microcomputer Protection technology and modern microelectronic technology
Fast development, relay protection and secondary device no longer need high-power driving, traditional voltage transformer secondary output 100V or
The voltage signal of person 100V/ √ 3 cannot directly be connected with microcomputer, it is difficult to adapt to Automation of Electric Systems, digitlization and intelligence
Development trend.Based on disadvantages described above, electronic type voltage transformer is applied and is given birth to.
As shown in Figure 1 and Figure 2, existing electronic type voltage transformer is mainly made of highvoltage resistance potential divider and debugging unit,
Wherein R1For high-voltage arm resistance, R2Voltage division formulas for low-voltage arm resistance, series resistance isSuch electricity
The main problem of minor voltage transformer is:
1. electronic type voltage transformer is debugged, amplitude is adjusted and phase compensation is both for R2Operation, amplitude adjust and
Phase compensation influences each other, and larger, debugging is complicated.Such as amplitude is transferred in precision, then by phase compensation to precision, at this moment
The amplitude regulated can have greatly changed, and need to readjust, and it is suitable that amplitude is adjusted, and phase may change, such as
This again and again increases debugging difficulty, reduces production efficiency；
2. electronic type voltage transformer amplitude is adjusted, resistance R is adjusted2Performance be affected to the precision of product, this
The quality requirement for just exchanging economize on electricity resistance is very high, and leading to product, the production cost increases；
3. the high-voltage arm and low-voltage arm of highvoltage resistance potential divider are not integral structures, nor one-pass molding.To single
The required precision of resistance value is higher, is unfavorable for resistance mass production；If the precision of single resistance is too low, band can be debugged to the later period
Carry out very big inconvenience, is unfavorable for the batch production of mutual inductor；
4. high-voltage arm used in electronic type voltage transformer and low-voltage arm are not same material, extraneous factor (temperature, electricity
Pressure etc.) variation when, the change rate of high-voltage arm and low-voltage arm resistance is inconsistent, be easy by extraneous factor interference, lead to mutual inductor
Stability be difficult to improve.
Summary of the invention
Present invention aim to address existing voltage transformers there is debugging complexity, higher cost, is unfavorable for batch metaplasia
It produces and stability the problem of being difficult to improve, a kind of multi-tap voltage transformer and its production, adjustment method, the sensor is provided
Stability and reliability with higher, and make the simpler convenience of the debugging of electronic type voltage transformer, improve production effect
Rate reduces production cost.
Technical proposal that the invention solves the above-mentioned problems is as follows:
A kind of multi-tap voltage transformer, including resitstance voltage divider and adjusting unit, the resitstance voltage divider includes high pressure
Arm resistance R1And low-voltage arm resistance；The low-voltage arm resistance includes concatenated first low-voltage arm resistance R2With the second low-voltage arm resistance
R3；The high-voltage arm resistance R1First end connect with high voltage transmission line, high-voltage arm resistance R1Second end and the first low-voltage arm electricity
Hinder R2First end connection, the first low-voltage arm resistance R2Second end and the second low-voltage arm resistance R3First end connection, institute
State the second low-voltage arm resistance R3Second end ground connection；The adjusting unit includes that amplitude adjusts circuit and phase compensating circuit；Institute
It states amplitude adjusting and is electrically connected to the second low-voltage arm resistance R3Both ends；The phase compensating circuit is connected to the first low-voltage arm electricity
Hinder R2First end and the second low-voltage arm resistance R3Second end；Or phase compensating circuit is connected to the second low-voltage arm resistance R3
Both ends.
Further, the low-voltage arm resistance further includes concatenated m third low-voltage arm resistance R4, m third low-voltage arm
Resistance R4It is connected on the second low-voltage arm resistance R3Second end, m >=1；The amplitude adjusting is electrically connected to the second low-voltage arm resistance
R3Or any third low-voltage arm resistance R4Both ends；The phase compensating circuit is connected to the first low-voltage arm resistance R2First end
With end third low-voltage arm resistance R4Second end；Or phase compensating circuit is connected to the second low-voltage arm resistance R3Or any
Three low-voltage arm resistance R4Both ends.
It further, further include having ground resistance, the first end of the ground resistance and the second low-voltage arm resistance R3Or the
Three low-voltage arm resistance R4Second end connection, the ground connection of the second end of ground resistance.
Further, the high-voltage arm resistance R1With low-voltage arm resistance using same resistance wire on a ceramic rod around
It makes；The low-voltage arm resistance is provided with one or more taps.
Further, the high-voltage arm resistance R1Resistance value between 30 megaohms~80 megaohms, the resistance value of low-voltage arm resistance
Between 15k Ω~25k Ω；The high-voltage arm resistance R1Resistance value ratio with low-voltage arm resistance is 3076:1 or 2659:1.
Further, it includes multiple concatenated resistance that the amplitude, which adjusts circuit,；The phase compensating circuit includes multiple
Capacitor in parallel.
Meanwhile the present invention also provides the production and adjustment method of a kind of above-mentioned multi-tap voltage transformer, including following step
It is rapid:
1) formula that is made into one highvoltage resistance potential divider:
Using same resistance wire on a ceramic rod coiling high-voltage arm resistance R1And low-voltage arm resistance；The low-voltage arm
Resistance is provided with one or more taps；
2) multi-tap voltage transformer is made；
3) voltage transformer is debugged:
Any resistance in concatenated low-voltage arm resistance is subjected to amplitude adjusting, is adjusted into precision, then will entirely connect
Low-voltage arm resistance carry out phase compensation to precision in；
Alternatively,
Any resistance in concatenated low-voltage arm resistance is subjected to amplitude adjusting, is adjusted in precision, then by the resistance into
In row phase compensation to precision.
In addition, the present invention also provides a kind of voltage transformer integrated high pressure resitstance voltage divider, including high-voltage arm resistance
R1And low-voltage arm resistance, the high-voltage arm resistance R1The coiling on a ceramic rod of same resistance wire is used with low-voltage arm resistance
It forms.
Further, the low-voltage arm resistance is provided with multiple taps.
The invention has the benefit that
1. electronic type voltage transformer mesohigh resitstance voltage divider segment signal output of the present invention uses multi-tap mode (i.e.
It increases and adjusts resistance R3), amplitude is adjusted and phase compensation separately carries out, and is reduced influencing each other between the two, is facilitated tune
Section, improves production efficiency, while by the high-voltage arm resistance R of highvoltage resistance potential divider1Integration is set as with low-voltage arm resistance
Structure only requires the no-load voltage ratio precision of height piezoresistance, does not require the precision of single resistance, improves the yield rate of resistance, favorably
In mass production.
2. the amplitude metering needle of electronic type voltage transformer of the present invention is to resistance R3It is operated, reduces and adjust resistance
It is required that with production cost, convenient for large-scale production.
3. the production and adjustment method of voltage transformer provided by the invention, by high-voltage arm resistance R1It is set with low-voltage arm resistance
Setting as one structure only requires the no-load voltage ratio precision of height piezoresistance, does not require the precision of single resistance, improve resistance at
Product rate, is conducive to mass production；Amplitude is adjusted simultaneously and phase compensation is adjusted and separately carried out, and reduces between the two mutual
It influences, facilitates adjusting, improve production efficiency.
4. the high-voltage arm resistance R of the highvoltage resistance potential divider of electronic type voltage transformer of the present invention1With low-voltage arm same
Time is made of same material and same technique, in extraneous factor (voltage, temperature etc.) variation, high-voltage arm resistance
R1It is consistent with low-voltage arm resistance change rate, product is reduced to the susceptibility of external environment, improves the stability of product.
5. the low potential of the output signal of electronic type voltage transformer of the present invention has ground connection and earth-free two kinds of implementations,
Both DTU/FTU low potential earthed system can have been matched, the hanging system of low potential can also be matched；After increasing ground resistance, both may be used
With the system being grounded for low potential, the earth-free system of low potential can be used for.
Detailed description of the invention
Fig. 1 is existing electronic voltage transducer schematic illustration；
Fig. 2 is existing voltage sensor schematic diagram；
Fig. 3 is electric one schematic diagram of multi-tap voltage transformer embodiment of the present invention；
Fig. 4 is electric two schematic diagram of multi-tap voltage transformer embodiment of the present invention；
Fig. 5 is that amplitude adjusts circuit diagram；
Fig. 6 is phase compensating circuit schematic diagram.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
As shown in figure 3, multi-tap voltage transformer of the invention is mainly made of resitstance voltage divider and adjusting unit.Resistance
Divider includes high-voltage arm resistance R1And low-voltage arm resistance；Low-voltage arm resistance includes the first low-voltage arm resistance R of series connection2, the second low pressure
Arm resistance R3；High-voltage arm resistance R1First end connect with high voltage transmission line, high-voltage arm resistance R1Second end and the first low-voltage arm
Resistance R2First end connection, the first low-voltage arm resistance R2Second end and the second low-voltage arm resistance R3First end connection, second
Low-voltage arm resistance R3Second end ground connection.Adjusting unit includes that amplitude adjusts circuit and phase compensating circuit, the second low-voltage arm electricity
Hinder R3Both ends connection amplitude adjust circuit；First low-voltage arm resistance R2First end and the second low-voltage arm resistance R3Second end
Connection phase compensating circuit or phase compensating circuit are connected to the second low-voltage arm resistance R3Both ends.
In other embodiments, resitstance voltage divider further includes having ground resistance, the first end of ground resistance and the second low pressure
Arm resistance R3Second end connection, the ground connection of the second end of ground resistance.
As shown in Figure 4, Figure 5, amplitude metering needle is to the second low-voltage arm resistance R3Operation, phase compensation are directed to R2+R3Operation or
For resistance R3Operation.Amplitude adjusts circuit and phase compensating circuit is available circuit, and it includes multiple strings that amplitude, which adjusts circuit,
The resistance of connection, phase compensating circuit include the capacitor of multiple parallel connections, and amplitude, which adjusts circuit, to be existed with the resistor coupled in parallel of suitable resistance value
Second low-voltage arm resistance R3Resistance both ends, are adjusted amplitude；Phase compensating circuit is in parallel using the capacitor of suitable capacitance
In R2+R3Both ends compensate phase.
The high-voltage arm resistance R of highvoltage resistance potential divider1It is integrated with low-voltage arm resistance, specially high and low pressure arm
For resistance using same resistance wire using being wound on above a ceramic rod by the way of noninductive, the resistance of low-voltage arm resistance is from total
Resistance wire in separate the resistance values of needs, the voltage division formulas of series resistance are as follows:
Alternatively,
The high-voltage arm resistance R of voltage transformer of the present invention1It is integrated with low-voltage arm resistance, only requires height piezoelectricity
The no-load voltage ratio precision of resistance, it is lower for the required precision of single resistance, the yield rate of resistance is improved, mass production is conducive to.
High-voltage arm resistance R1With low-voltage arm in the same time, made of same material and same technique, extraneous factor (voltage,
Temperature etc.) variation when, high-voltage arm resistance R1It is consistent with low-voltage arm resistance change rate, product is reduced to the sensitivity of external environment
Degree, improves the stability of product.
Specifically, high-voltage arm resistance R1Resistance value between 30 megaohms~80 megaohms, the resistance value of low-voltage arm resistance is in 15k Ω
Between~25k Ω.High-voltage arm resistance R1Be decided according to the actual requirements with the resistance value ratio of low-voltage arm resistance, for example, 3070:1 or
2659:1。
Electronic type voltage transformer mesohigh resitstance voltage divider segment signal output of the present invention (is increased using three tap modes
Adjusting resistance R is added3), amplitude is adjusted and phase compensation separately carries out, and reduce influencing each other between the two, facilitates adjusting,
Production efficiency is improved, amplitude metering needle is to resistance R3It is operated, reduces the resistance requirement and production cost of adjusting,
Convenient for large-scale production.
As shown in figure 4, the high-voltage arm resistance R of the highvoltage resistance potential divider of mutual (biography) sensor of electronic type voltage1, the first low pressure
Arm resistance R2、R3, ground resistance RGround connectionIt can be replaced with the concatenated mode of multiple resistance.Amplitude adjusting can also pass through multi-tap
It adjusts, debugging when only needs to be adjusted for one of resistor tap, also can achieve this purpose.?
That is low-voltage arm resistance can also include m third low-voltage arm resistance R4, m >=1；M third low-voltage arm resistance R4Resistance value
It may be the same or different, amplitude adjusting is electrically connected to the second low-voltage arm resistance R3Or any third low-voltage arm resistance R4's
Both ends；Phase compensating circuit is connected to the first low-voltage arm resistance R2First end and end third low-voltage arm resistance R4Second end；
Or phase compensating circuit is connected to the second low-voltage arm resistance R3Or any third low-voltage arm resistance R4Both ends.
The present invention is directed to any resistance adjustment in low-voltage arm resistance, rather than adjusts for entire low-voltage arm resistance,
So phase compensation and amplitude compensation influence each other and can be ignored, and adjustment process becomes simply, fast when debugging.Amplitude
Compensation is carried out just in any resistance, and debugging resistance influences very little for the precision of product, selects conventional, electric-resistance that can expire
Foot requires.
Meanwhile the present invention also provides the production and adjustment method of a kind of above-mentioned multi-tap voltage transformer, including following step
It is rapid:
1) formula that is made into one highvoltage resistance potential divider:
Using same resistance wire on a ceramic rod coiling high-voltage arm resistance R1And low-voltage arm resistance；The low-voltage arm
Resistance is provided with one or more taps；
2) multi-tap voltage transformer is made；
3) voltage transformer is debugged:
Amplitude adjusting is carried out to any resistance in concatenated low-voltage arm resistance, is adjusted into precision, then to entire series connection
Low-voltage arm resistance carry out phase compensation to precision in；
Alternatively, carrying out amplitude adjusting to any resistance in concatenated low-voltage arm resistance, adjust into precision, then to the electricity
Resistance carries out in phase compensation to precision.
In addition, the present invention also provides a kind of voltage transformer integrated high pressure resitstance voltage divider, including high-voltage arm resistance
R1And low-voltage arm resistance, high-voltage arm resistance R1It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire.
Low-voltage arm resistance is provided with multiple taps.
Claims (10)
1. a kind of multi-tap voltage transformer, including resitstance voltage divider and adjusting unit, it is characterised in that:
The resitstance voltage divider includes high-voltage arm resistance R1And low-voltage arm resistance；The low-voltage arm resistance includes concatenated first low
Pressure arm resistance R2With the second low-voltage arm resistance R3；
The high-voltage arm resistance R1First end connect with high voltage transmission line, high-voltage arm resistance R1Second end and the first low-voltage arm
Resistance R2First end connection, the first low-voltage arm resistance R2Second end and the second low-voltage arm resistance R3First end connection,
The second low-voltage arm resistance R3Second end ground connection；
The adjusting unit includes that amplitude adjusts circuit and phase compensating circuit；
The amplitude adjusting is electrically connected to the second low-voltage arm resistance R3Both ends；
The phase compensating circuit is connected to the first low-voltage arm resistance R2First end and the second low-voltage arm resistance R3Second end；
Or phase compensating circuit is connected to the second low-voltage arm resistance R3Both ends.
2. multi-tap voltage transformer according to claim 1, it is characterised in that: the low-voltage arm resistance further includes series connection
M third low-voltage arm resistance R4, m third low-voltage arm resistance R4It is connected on the second low-voltage arm resistance R3Second end, m >=1；
The amplitude adjusting is electrically connected to the second low-voltage arm resistance R3Or any third low-voltage arm resistance R4Both ends；
The phase compensating circuit is connected to the first low-voltage arm resistance R2First end and end third low-voltage arm resistance R4Second
End；
Or phase compensating circuit is connected to the second low-voltage arm resistance R3Or any third low-voltage arm resistance R4Both ends.
3. multi-tap voltage transformer according to claim 2, it is characterised in that: it further include having ground resistance, it is described to connect
The first end and end third low-voltage arm resistance R of ground resistance4Second end connection, the ground connection of the second end of the ground resistance.
4. multi-tap voltage transformer according to claim 1, it is characterised in that: it further include having ground resistance, it is described to connect
The first end of ground resistance and the second low-voltage arm resistance R3Second end connection, the ground resistance second end ground connection.
5. multi-tap voltage transformer according to claim 1 or 2 or 3 or 4, it is characterised in that: the high-voltage arm resistance R1
It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire；The low-voltage arm resistance be provided with one or
Multiple taps.
6. multi-tap voltage transformer according to claim 5, it is characterised in that: the high-voltage arm resistance R1Resistance value exist
Between 30 megaohms~80 megaohms, the resistance value of low-voltage arm resistance is between 15k Ω~25k Ω；The high-voltage arm resistance R1And low pressure
The resistance value ratio of arm resistance is 3076:1 or 2659:1.
7. multi-tap voltage transformer according to claim 5, it is characterised in that: it includes multiple that the amplitude, which adjusts circuit,
Concatenated resistance；The phase compensating circuit includes the capacitor of multiple parallel connections.
8. the production and adjustment method of multi-tap voltage transformer as described in claim 1-7 is any, which is characterized in that including with
Lower step:
1) formula that is made into one highvoltage resistance potential divider:
Using same resistance wire on a ceramic rod coiling high-voltage arm resistance R1And low-voltage arm resistance；The low-voltage arm resistance
It is provided with one or more taps；
2) multi-tap voltage transformer is made；
3) voltage transformer is debugged:
Any resistance in concatenated low-voltage arm resistance is subjected to amplitude adjusting, is adjusted into precision, then will be entire concatenated low
Pressure arm resistance carries out in phase compensation to precision；
Alternatively,
Any resistance in concatenated low-voltage arm resistance is subjected to amplitude adjusting, is adjusted into precision, then the resistance is subjected to phase
In the compensation to precision of position.
9. a kind of voltage transformer integrated high pressure resitstance voltage divider, it is characterised in that: including high-voltage arm resistance R1And low-voltage arm
Resistance, the high-voltage arm resistance R1It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire.
10. voltage transformer integrated high pressure resitstance voltage divider according to claim 9, it is characterised in that: the low pressure
Arm resistance is provided with multiple taps.
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| CN202512151U (en) * | 2012-03-07 | 2012-10-31 | 北京瑞奇恩互感器设备有限公司 | Electronic type capacitive voltage divider |
| CN103825284A (en) * | 2014-01-28 | 2014-05-28 | 杭州电子科技大学 | Multi-tap electric reactor-based capacitive load power factor compensation circuit |
| CN104360141A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Stand-off ratio voltage coefficient detection method based on separable direct current voltage divider |
| CN204228774U (en) * | 2014-11-14 | 2015-03-25 | 国家电网公司 | A kind of 1000kV DC partial voltage for DC voltage addition test compares standard set-up |
| EP3179258A1 (en) * | 2015-12-10 | 2017-06-14 | ABB Schweiz AG | Electrical installation device with current sensing circuit |
| CN106053909A (en) * | 2016-07-25 | 2016-10-26 | 浙江天际互感器有限公司 | Resistor divider type three-phase combined voltage transformer with zero sequence voltage output |
| CN206515384U (en) * | 2017-01-16 | 2017-09-22 | 宿迁市计量测试所 | A kind of electronic type voltage transformer |
| CN107064601A (en) * | 2017-03-20 | 2017-08-18 | 杭州零尔电力科技有限公司 | A kind of electronic type voltage transformer |
| CN206583958U (en) * | 2017-03-20 | 2017-10-24 | 杭州零尔电力科技有限公司 | A kind of electronic type voltage transformer |
| CN209803215U (en) * | 2018-11-29 | 2019-12-17 | 西安高研电器有限责任公司 | Multi-tap voltage transformer |
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