CN107037388A - A kind of Secondary Load of Voltage Transformer improves device - Google Patents
A kind of Secondary Load of Voltage Transformer improves device Download PDFInfo
- Publication number
- CN107037388A CN107037388A CN201611254149.8A CN201611254149A CN107037388A CN 107037388 A CN107037388 A CN 107037388A CN 201611254149 A CN201611254149 A CN 201611254149A CN 107037388 A CN107037388 A CN 107037388A
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- 238000005259 measurement Methods 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention relates to electricity consumption pressure transformer technical field, more particularly to a kind of Secondary Load of Voltage Transformer improvement device is measured in power system, specifically a kind of three-phase three-wire electric energy meter improves device with Secondary Load of Voltage Transformer.The present invention includes tested voltage transformer, standard potential transformer and mutual-inductor tester, is that shunt load improves device in tested Secondary Circuit of Potential Transformer, and the regulation switched by improving load device carries out the measurement of rated value and lower limit；Then the secondary terminals of standard potential transformer and tested voltage transformer are connected with mutual-inductor tester.Three-phase three-wire electric energy meter voltage transformer error measurement problem can be effectively solved, the voltage transformer Burden box of tradition calibrating can be replaced, be directly parallel in tested Secondary Circuit of Potential Transformer, different from voltage transformer Burden box without dismounting.With low cost with simple in construction, it is easy to implement, the advantages of without carrying voltage transformer Burden box.
Description
Technical field
The present invention relates to electricity consumption pressure transformer technical field, more particularly to a kind of voltage transformer two are measured in power system
Secondary load improves device, and specifically a kind of three-phase three-wire electric energy meter improves device with Secondary Load of Voltage Transformer.
Background technology
According to JJG 314-2010《Measurement voltage ct calibrating code》It is required that, error inspection is carried out to voltage transformer
Timing, it is necessary to examine respectively to secondary load rated value and lower limit.Traditional calibrating mode is in tested voltage transformer
Voltage transformer Burden box in parallel in secondary circuit, is allocated to corresponding numerical value by Burden box and carries out rated value and lower limit survey
Amount.However, for power system standard potential transformer, secondary rated load is generally 0.07VA, voltage transformer is born
Lotus case minimum range is 1.25VA, it is impossible to meet the measurement to rated value, generally surveys rated value by the equivalent 0VA of lower limit
Amount, did not both make a distinction rated value and lower limit, the error of voltage transformer when increasing rated value again.
The content of the invention
For above-mentioned the shortcomings of the prior art, the present invention proposes that a kind of Secondary Load of Voltage Transformer is improved
Device, specifically a kind of three-phase three-wire electric energy meter improves device with Secondary Load of Voltage Transformer, and its purpose is to reach
The voltage transformer Burden box of tradition calibrating is replaced using the present apparatus, is directly parallel in tested Secondary Circuit of Potential Transformer,
Goal of the invention different from voltage transformer Burden box without dismounting.By the regulation to switch, rated value can be carried out respectively
With the error testing of lower limit
In order to reach foregoing invention purpose, the technical solution adopted for the present invention to solve the technical problems is：
A kind of Secondary Load of Voltage Transformer improves device, including tested voltage transformer, standard potential transformer and mutually
Sensor tester, is that shunt load improves device in tested Secondary Circuit of Potential Transformer, is opened by improving device to load
The regulation of pass carries out the measurement of rated value and lower limit；Then by the secondary terminals of standard potential transformer and tested voltage transformer
Son is connected with mutual-inductor tester.
The load improves device parallel connection and is inserted into the tested transformer jack of mutual-inductor tester, load is improved dress
Put and be integrated with mutual-inductor tester；It is insulated conductor that load, which improves device inner lead, and load resistance and switch are connected on absolutely
On edge wire；
The insulated conductor is general 6 squares of insulated conductors.
The tested voltage transformer select three-phase three-wire electric energy meter voltage transformer, secondary load improve device with
The secondary circuit of three-phase three-wire electric energy meter voltage transformer is in parallel.
The load improves device and is broadly divided into resistance and switch two parts, because standard potential transformer rated load is
0.07VA, three-phase three-wire electric energy meter is 100V, standard potential transformer bearing power factor with voltage transformer secondary voltage
COS Ф=1.0, load capacity formulaTherefore Z is about 143k Ω, and is purely resistive load.
The purely resistive load, is that resistance is fixed value 143k Ω, and error does not surpass when environment temperature is (20 ± 5) DEG C
± 3% is crossed, environment temperature often changes 10 DEG C, and the error change of load is no more than ± 2%.
When the load improves the switch closure of device, rated value measurement is carried out, the load that load is improved into device is served as
The secondary load of tested voltage transformer；When carrying out lower limit measurement, load is improved into switching off for device, test device
Open circuit, it is zero load to be detected the secondary load of voltage transformer.
The beneficial effects of the invention are as follows：
The present invention can effectively solve three-phase three-wire electric energy meter voltage transformer error measurement problem, it is possible to use this
Device replaces the voltage transformer Burden box of tradition calibrating, is directly parallel in tested Secondary Circuit of Potential Transformer, is different from
Voltage transformer Burden box is without dismounting.The present invention can also carry out rated value and lower limit respectively by the regulation to switch
Error testing, rated value and lower limit are measured respectively.It is with low cost simultaneously also with simple in construction, implement easy,
The advantages of voltage transformer Burden box need not be carried.
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further detailed explanation, but not by the present embodiment institute
Limit.
Brief description of the drawings
Fig. 1 is the system position figure of the present invention；
Fig. 2 is the simplified structure diagram of the present invention.
In figure：Standard potential transformer 1, is detected voltage transformer 2, mutual-inductor tester 3, switch 4.
Embodiment
The present invention is that a kind of Secondary Load of Voltage Transformer improves device, is the secondary circuit in tested voltage transformer 2
A middle relatively-stationary load in parallel improves device, and the regulation switched by improving load device carries out rated value and lower limit
Measurement.The tested voltage transformer 2 selects three-phase three-wire electric energy meter voltage transformer, secondary load improve device with
The secondary circuit of three-phase three-wire electric energy meter voltage transformer is in parallel, without extra shunt voltage transformer load in experiment
Case, while off-test by load without improving device dismounting.
Embodiment is as follows：
According to shown in Fig. 1, Fig. 1 is the system position figure of the present invention, with low potential measurement error.
Load improvement device parallel connection is inserted into the tested transformer jack of mutual-inductor tester first, load improves dress
Put can regard as with mutual-inductor tester be " one ".Load improves device inner lead and uses general 6 squares of insulated conductors,
Load resistance and switch are connected on insulated conductor.
Then by the secondary terminals of standard potential transformer 1 and tested voltage transformer 2 as shown in Figure 1 with transducer check
Instrument 3 is connected.
Load improves the simplification structure of device as shown in Fig. 2 being broadly divided into resistance and switch two parts.Due to normal voltage
Transformer rated load is generally 0.07VA, and three-phase three-wire electric energy meter is 100V, normal voltage with voltage transformer secondary voltage
Bearing power factor COS Ф=1.0 of transformer 1, load capacity formulaTherefore Z is about 143k Ω, and negative for purely resistive
Carry.
The purely resistive load, is that resistance is fixed value 143k Ω, and error does not surpass when environment temperature is (20 ± 5) DEG C
Cross ± 3%.Environment temperature often changes 10 DEG C, and the error change of load is no more than ± 2%.
Ax represents standard potential transformer first winding below Fig. 2 Plays voltage transformer, is detected under voltage transformer
Square Ax represents tested voltage transformer first winding.
When carrying out rated value measurement, the switch 4 that load is improved into device is closed, and it is mutual that tested voltage is served as in the load of device
The secondary load of sensor 2；When carrying out lower limit measurement, the switch 4 that load is improved into device disconnects, test device open circuit, quilt
It is zero load to examine the secondary load of voltage transformer 2.
Claims (7)
1. a kind of Secondary Load of Voltage Transformer improves device, including tested voltage transformer, standard potential transformer and mutual inductance
Device tester, it is characterized in that：Shunt load improves device in tested Secondary Circuit of Potential Transformer, is filled by improving load
The regulation for putting switch carries out the measurement of rated value and lower limit；Then by the two of standard potential transformer and tested voltage transformer
Secondary terminal is connected with mutual-inductor tester.
2. a kind of Secondary Load of Voltage Transformer according to claim 1 improves device, it is characterized in that：The load is improved
Device parallel connection is inserted into the tested transformer jack of mutual-inductor tester, and it is one load is improved device with mutual-inductor tester
Body；It is insulated conductor that load, which improves device inner lead, and load resistance and switch are connected on insulated conductor.
3. a kind of Secondary Load of Voltage Transformer according to claim 2 improves device, it is characterized in that：The insulated conductor
For general 6 squares of insulated conductors.
4. a kind of Secondary Load of Voltage Transformer according to claim 1 improves device, it is characterized in that：The tested voltage
Transformer selects three-phase three-wire electric energy meter voltage transformer, and secondary load improves device and three-phase three-wire electric energy meter electricity consumption
Press the secondary circuit of transformer in parallel.
5. a kind of Secondary Load of Voltage Transformer according to claim 1 improves device, it is characterized in that：The load is improved
Device is broadly divided into resistance and switch two parts, because standard potential transformer rated load is 0.07VA, three-phase three-wire system electricity
Energy table is 100V, standard potential transformer bearing power factor COS Ф=1.0, load capacity with voltage transformer secondary voltage
FormulaTherefore Z is about 143k Ω, and is purely resistive load.
6. a kind of Secondary Load of Voltage Transformer according to claim 5 improves device, it is characterized in that：The purely resistive is born
Carry, be that resistance is fixed value 143k Ω when environment temperature is (20 ± 5) DEG C, error is no more than ± 3%, and environment temperature often becomes
Change 10 DEG C, the error change of load is no more than ± 2%.
7. a kind of Secondary Load of Voltage Transformer according to claim 1 improves device, it is characterized in that：The load is improved
During the switch closure of device, rated value measurement is carried out, the secondary of tested voltage transformer is served as in the load that load is improved into device
Load；When carrying out lower limit measurement, load is improved into switching off for device, test device open circuit is detected voltage transformer
Secondary load for zero load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611254149.8A CN107037388A (en) | 2016-12-30 | 2016-12-30 | A kind of Secondary Load of Voltage Transformer improves device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611254149.8A CN107037388A (en) | 2016-12-30 | 2016-12-30 | A kind of Secondary Load of Voltage Transformer improves device |
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| Publication Number | Publication Date |
|---|---|
| CN107037388A true CN107037388A (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611254149.8A Pending CN107037388A (en) | 2016-12-30 | 2016-12-30 | A kind of Secondary Load of Voltage Transformer improves device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888099A (en) * | 2019-12-09 | 2020-03-17 | 国网山东省电力公司电力科学研究院 | Test control system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819264A (en) * | 2010-05-10 | 2010-09-01 | 山西省机电设计研究院 | Portable type current transformer calibrating device |
| WO2012142736A1 (en) * | 2011-04-22 | 2012-10-26 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN204287463U (en) * | 2014-11-28 | 2015-04-22 | 国家电网公司 | A kind of three-phase four-wire system standard potential transformer secondary load modifying device |
| CN205157757U (en) * | 2015-11-23 | 2016-04-13 | 国家电网公司 | Standard current transformer secondary load improves device |
-
2016
- 2016-12-30 CN CN201611254149.8A patent/CN107037388A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819264A (en) * | 2010-05-10 | 2010-09-01 | 山西省机电设计研究院 | Portable type current transformer calibrating device |
| WO2012142736A1 (en) * | 2011-04-22 | 2012-10-26 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN204287463U (en) * | 2014-11-28 | 2015-04-22 | 国家电网公司 | A kind of three-phase four-wire system standard potential transformer secondary load modifying device |
| CN205157757U (en) * | 2015-11-23 | 2016-04-13 | 国家电网公司 | Standard current transformer secondary load improves device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888099A (en) * | 2019-12-09 | 2020-03-17 | 国网山东省电力公司电力科学研究院 | Test control system and method |
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Application publication date: 20170811 |
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