CN202870208U - Anti-induction voltage power transmission line power frequency parameter testing auxiliary apparatus - Google Patents
Anti-induction voltage power transmission line power frequency parameter testing auxiliary apparatus Download PDFInfo
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- CN202870208U CN202870208U CN 201220534602 CN201220534602U CN202870208U CN 202870208 U CN202870208 U CN 202870208U CN 201220534602 CN201220534602 CN 201220534602 CN 201220534602 U CN201220534602 U CN 201220534602U CN 202870208 U CN202870208 U CN 202870208U
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 title claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000010363 phase shift Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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Abstract
An anti-induction voltage power transmission line power frequency parameter testing auxiliary apparatus comprises a first adjustable capacitor, a first resistance divider voltage transformer and a digital voltage electronic phase shifter, wherein the first adjustable capacitor and the first resistance divider voltage transformer are connected in series and then are connected to a line input terminal of an overhauling or a newly constructed line, and a secondary side of the first resistance divider voltage transformer is connected with a line voltmeter displaying induction voltage amplitude and a line phase meter displaying phase difference value between the induction voltage and power voltage; the digital voltage electronic phase shifter connected with an unput 220V power source is connected with a step up transformer, and a secondary boost side of the step up transformer is connected in series with the line input terminal of the overhauling or the newly constructed line through a switch KT and a second adjustable capacitor; and the first adjustable capacitor and the second adjustable capacitor are parallelly connected and then are connected with the line input terminal of the overhauling or the newly constructed line through connecting a 50Hz band-pass filter. The auxiliary apparatus not only realizes induction voltage testing of a power transmission line end portion, but also suppresses the induction voltage of the power transmission line end portion, so the induction voltage is reduced to a scope allowed by the testing apparatus.
Description
Technical field
The utility model relates to a kind of anti-induced voltage transmission line power frequency parameter test servicing unit.
Background technology
The line parameter circuit value test is in order to obtain the correlation parameter of transmission line of electricity, for adjusting of relay protection of power system provides basic data, ensures the safe operation of electric system.Along with the enlarging of transformer station and the increase of newly-built transmission line of electricity, in order to take full advantage of the circuit corridor, the two-circuit of joint using even three loop overhead transmission lines are more and more, because adjacent lines can not have a power failure simultaneously during test, disturb at the scene in the more serious situation, induced voltage can reach several kilovolts, and induction current may surpass 10 A.In this case, when carrying out the line parameter circuit value test, the existence of induced voltage not only can affect the accuracy of test data, and may be to testing equipment injury or damage, even the life safety that hurts testing crew is arranged, and usually can't carry out this surveying work.At present, existingly in the on-the-spot line parameter circuit value test job of electric system cause the precedent that testing crew is injured, proving installation is burnt because induced voltage is too high.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and provide a kind of energy to offset or suppress the induced voltage of transmission line of electricity end, be implemented in than the transmission line power frequency parameter test under the high induction voltage, guarantee the anti-induced voltage transmission line power frequency parameter test servicing unit of line parameter circuit value Security of test and data correctness.
The purpose of this utility model is finished by following technical solution, it comprises: the line input of access in maintenance or newly-built circuit behind the first tunable capacitor and the first electric resistance partial pressure type voltage mutual inductor serial is connected to the circuit phase meter that can show induced voltage amplitude line voltage distribution table and can show induced voltage and supply voltage phase difference value at the secondary side of described the first electric resistance partial pressure type voltage mutual inductor; The one digital voltage electronic phase shifter that joins with input 220V power supply is connected with a step-up transformer, in the secondary step-up side of step-up transformer by the line input in a switch and one second tunable capacitor series connection access maintenance or the newly-built circuit.
The first tunable capacitor described in the utility model and the second tunable capacitor connect together, and by connecting the line input that accesses after the 50Hz bandpass filter in described maintenance or the newly-built circuit.
The secondary step-up side of described step-up transformer also and be connected to the second electric resistance partial pressure voltage transformer (VT), and be connected to phase-shifting voltages table and phase shift phase meter at the secondary side of the second electric resistance partial pressure voltage transformer (VT), and the dephased current table on the secondary step-up side that is serially connected in step-up transformer has consisted of measuring system.
The utility model is based on the principle of arc suppression coil inductive current building-out capacitor electric current, designed the circuit that a kind of voltage paraphase compensated and be convenient to on-the-spot practical application mutually, by the reasonable disposition of component parameters, developed corresponding device, it has following beneficial effect:
First it realized that the transmission line of electricity induced voltage accurately measures and suppress, and make the miniaturization of equipment; The utility model uses electric capacity and electric resistance partial pressure type voltage mutual inductor serial to make the miniaturization of device that feasibility arranged, induced voltage realizing also having realized when transmission line of electricity end induced voltage is measured inhibition transmission line of electricity end makes in its scope that is reduced to the test apparatus permission;
Second the utility model uses 50Hz bandpass filter and shift frequency line parameter tester to be used, and has eliminated anti-induced voltage servicing unit introducing to the impact of line parameter circuit value test data.
Description of drawings
Fig. 1 is the circuit theory diagrams of anti-induced voltage line parameter circuit value testing auxiliary device described in the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done detailed introduction: shown in Figure 1, the utility model comprises: the line input S of access in maintenance or newly-built circuit after the first tunable capacitor C1 and the first electric resistance partial pressure type voltage mutual inductor PT1 series connection is connected to the line voltage distribution table 1 that can show the induced voltage amplitude and can shows the circuit phase meter 2 of induced voltage and supply voltage phase difference value at the secondary side of described the first electric resistance partial pressure type voltage mutual inductor PT1; The one digital voltage electronic phase shifter 3 that joins with input 220V power supply is connected with a step-up transformer 4, in the secondary step-up side of step-up transformer 4 by the line input S in a K switch T and one second tunable capacitor C2 series connection access maintenance or the newly-built circuit.
The first tunable capacitor C1 described in the utility model and the second tunable capacitor C2 connect together, and the line input S that accesses afterwards in described maintenance or the newly-built circuit by connecting a 50Hz bandpass filter 5.
The secondary step-up side of described step-up transformer 4 also and be connected to the second electric resistance partial pressure voltage transformer pt 2, and be connected to phase-shifting voltages table 6 and phase shift phase meter 7 at the secondary side of the second electric resistance partial pressure voltage transformer pt 2, and the dephased current table CT on the secondary step-up side that is serially connected in step-up transformer has consisted of measuring system.
The utility model will overhaul by tunable capacitor C1, electric resistance partial pressure type voltage mutual inductor PT1 or the induction high voltage of newly-built circuit becomes PT1 secondary side low-voltage, carry out the phase place correction by respective measurement system, the line voltage distribution table shows the induced voltage amplitude, and the circuit phase meter shows induced voltage and supply voltage phase difference value; If the induced voltage amplitude less than 1kV(in the insulation tolerance range of test apparatus wiring) then do not compensate input inversion voltage; If the induced voltage amplitude is greater than 1kV, then compensate input inversion voltage: utilize digital voltage electronic phase shifter, step-up transformer that the 220kV voltage source voltage of input is carried out amplitude and phase transition, the voltage signal after the conversion is measured by electric resistance partial pressure type voltage mutual inductor PT2, dephased current table CT, corresponding measuring system.When changing voltage is consistent with the induced voltage amplitude, during phase phasic difference 180, the KT that closes a switch feeds back this changing voltage in transmission line of electricity by tunable capacitor C2, and changing voltage and induced voltage are superimposed, thereby reduces the induced voltage of circuit end.
Embodiment:
50Hz bandpass filter described in the utility model, its effect is: only allow the voltage signal of 50Hz to pass through, stop the voltage signal of shift frequency line parameter tester 45Hz and 55Hz to enter induction elimination servicing unit, eliminate this device introducing to the impact of line parameter circuit value test data.
First tunable capacitor value C1:100 ~ 200nF;
Second tunable capacitor value C2:1 ~ 2uF;
The digital voltage electronic phase shifter: capacity is 250VA, and output voltage is 0 ~ 200V, and phase shift range is 0 ~ 360 °;
Electric resistance partial pressure type mutual inductor PT1: resistance R 1 is 10M Ω, mutual inductor ratio 10kV/1V;
Electric resistance partial pressure type mutual inductor PT2: resistance R 1 is 1M Ω, mutual inductor ratio 1kV/1V;
The specific works process is:
1, measure the required induced voltage that carries out the line parameter circuit value measurement circuit, anti-induced voltage line parameter circuit value testing auxiliary device transfers to induced voltage measurement pattern i.e. " KT disconnection, bucking voltage loop disconnect ", and the line influence voltage tester is carried out in the instrument access;
If 2 instrument panels show that the induced voltage amplitude is less than 1kV, then can withdraw from anti-induced voltage servicing unit, think this induced voltage in the insulation tolerance range of instrument, can directly use the shift frequency line parameter tester to test, testing crew needs the tape insulation gloves to operate in the test process;
If 3 instrument panels show that the induced voltage amplitude is greater than 1kV, then compensate voltage-regulation, utilize digital phase shifter and step-up transformer that 220V voltage is carried out phase shift, boosts, monitor bucking voltage measuring system display panel, make the phase place of bucking voltage and amplitude and induced voltage substantially differ 180; The KT that closes a switch feeds back this voltage in transmission line of electricity by capacitor C 2 and bandpass filter.Be reduced to 1kV when following when monitored transmission line of electricity end induced voltage by the induced voltage measuring system, can think that induced voltage suppresses complete, keeps this unit state constant.Access shift frequency line parameter tester carries out the line parameter circuit value test.
Claims (3)
1. the power frequency parameter test servicing unit of an anti-induced voltage transmission line of electricity, it comprises: the line input (S) of access in maintenance or newly-built circuit after the first tunable capacitor (C1) and the series connection of the first electric resistance partial pressure type voltage mutual inductor (PT1) is characterized in that being connected to the line voltage distribution table (1) that can show the induced voltage amplitude and showing induced voltage and the circuit phase meter of supply voltage phase difference value (2) at the secondary side of described the first electric resistance partial pressure type voltage mutual inductor (PT1); The one digital voltage electronic phase shifter (3) that joins with input 220V power supply, be connected with a step-up transformer (4), the line input (S) in the secondary step-up side of step-up transformer (4) is connected access maintenance or newly-built circuit by a switch (KT) and one second tunable capacitor (C2).
2. the power frequency parameter test servicing unit of anti-induced voltage transmission line of electricity according to claim 1, it is characterized in that described the first tunable capacitor (C1) and the second tunable capacitor (C2) connect together, and access afterwards line input (S) in described maintenance or the newly-built circuit by connecting a 50Hz bandpass filter (5).
3. the power frequency parameter test servicing unit of anti-induced voltage transmission line of electricity according to claim 1, the secondary step-up side that it is characterized in that described step-up transformer (4) also and be connected to the second electric resistance partial pressure voltage transformer (VT) (PT2), and be connected to phase-shifting voltages table (6) and phase shift phase meter (7) at the secondary side of the second electric resistance partial pressure voltage transformer (VT) (PT2), and the dephased current table (CT) on the secondary step-up side that is serially connected in step-up transformer (4) has consisted of measuring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220534602 CN202870208U (en) | 2012-10-18 | 2012-10-18 | Anti-induction voltage power transmission line power frequency parameter testing auxiliary apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220534602 CN202870208U (en) | 2012-10-18 | 2012-10-18 | Anti-induction voltage power transmission line power frequency parameter testing auxiliary apparatus |
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| Publication Number | Publication Date |
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| CN202870208U true CN202870208U (en) | 2013-04-10 |
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| CN 201220534602 Expired - Fee Related CN202870208U (en) | 2012-10-18 | 2012-10-18 | Anti-induction voltage power transmission line power frequency parameter testing auxiliary apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457224A (en) * | 2013-09-06 | 2013-12-18 | 国家电网公司 | Electric transmission line inducted voltage restraint device based on impedance adjustment |
| CN105572490A (en) * | 2014-08-14 | 2016-05-11 | 财团法人交大思源基金会 | Method for obtaining plug combination and power line topology of detection device and electronic device thereof |
| CN107783000A (en) * | 2017-12-06 | 2018-03-09 | 朱月良 | Auxiliary reclay induced voltage shielding-RC speed selects test box |
| CN109813990A (en) * | 2019-03-21 | 2019-05-28 | 山西晋电电力科技有限公司电网技术分公司 | Transmission line parameter tests security protection platform |
-
2012
- 2012-10-18 CN CN 201220534602 patent/CN202870208U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457224A (en) * | 2013-09-06 | 2013-12-18 | 国家电网公司 | Electric transmission line inducted voltage restraint device based on impedance adjustment |
| CN103457224B (en) * | 2013-09-06 | 2016-01-20 | 国家电网公司 | A kind of transmission line induced voltage suppression device based on impedance adjustment |
| CN105572490A (en) * | 2014-08-14 | 2016-05-11 | 财团法人交大思源基金会 | Method for obtaining plug combination and power line topology of detection device and electronic device thereof |
| CN107783000A (en) * | 2017-12-06 | 2018-03-09 | 朱月良 | Auxiliary reclay induced voltage shielding-RC speed selects test box |
| CN109813990A (en) * | 2019-03-21 | 2019-05-28 | 山西晋电电力科技有限公司电网技术分公司 | Transmission line parameter tests security protection platform |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20201018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |