CN201141903Y - Load test instrument of three-phase through-flow simulation belt of transforming station - Google Patents
Load test instrument of three-phase through-flow simulation belt of transforming station Download PDFInfo
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- CN201141903Y CN201141903Y CNU2007201943978U CN200720194397U CN201141903Y CN 201141903 Y CN201141903 Y CN 201141903Y CN U2007201943978 U CNU2007201943978 U CN U2007201943978U CN 200720194397 U CN200720194397 U CN 200720194397U CN 201141903 Y CN201141903 Y CN 201141903Y
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- 238000004088 simulation Methods 0.000 title claims abstract description 14
- 238000012360 testing method Methods 0.000 title claims description 19
- 230000001131 transforming effect Effects 0.000 title 1
- 230000010363 phase shift Effects 0.000 claims abstract description 17
- 238000005070 sampling Methods 0.000 claims description 27
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 7
- 238000000819 phase cycle Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036581 peripheral resistance Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
Disclosed is a load simulation tester with three-phase current, which includes a current output circuit, a current sample circuit, a measurement and control device, and a controller. The current output circuit is connected with the measurement and control device and the current sample circuit. The tester also includes a three-phase power supply circuit, a single-phase/ three-phase alterable current source and a three-phase voltage supply; the single-phase/ three-phase alterable current source includes a current coarse adjusting circuit and a current amplifying circuit; the three-phase power supply circuit is connected with the current coarse adjusting circuit which is connected with the current amplifying circuit; the current amplifying circuit is then connected with the current output circuit; the three-phase power supply circuit is connected with a sample tracking circuit which is connected with a phase shift amplitude circuit; and the phase shift amplitude circuit is connected with a voltage power amplifying circuit which is connected with a voltage sample circuit. The current output circuit, the current sample circuit, the sample tracking circuit, the current coarse adjusting circuit, the phase shift amplitude circuit and the voltage sample circuit are all connected with the controller. The utility model has better safety and convenient usage, and can increase the working efficiency.
Description
Technical field
The utility model belongs to a kind of electric substation through-flow simulation load test instrument.
Background technology
The at present domestic single-phase through-flow method that generally adopts; output current; can verify the no-load voltage ratio of CT; but can't check the full CT of institute polarity; particularly used change protection CT is simultaneously because when on-load, if load current is less; just can not can only guarantee by through-flow test by load test correct verification CT no-load voltage ratio, polarity.Guarantee the correctness of the CT of electric substation no-load voltage ratio, polarity reliably, easily by the test of this device.
Summary of the invention
For the no-load voltage ratio that overcomes the CT that can only verify electric substation that has through-flow simulation load test equipment, the deficiency that can't check CT polarity, experimental reliability difference, the utility model provides a kind of good reliability, can measure the through-flow simulation load test of the electric substation's three-phase instrument of no-load voltage ratio and the polarity of the CT of electric substation simultaneously.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of electric substation three-phase is through-flow simulation load test instrument, comprise current output circuit, current sampling circuit, measure and control device and controller, described current output circuit connects measure and control device and current sampling circuit, described current output circuit is connected controller with current sampling circuit, described electric substation three-phase is through-flow, and simulation load test instrument also comprises three-phase power circuit, the single-phase/three-phase variable current source, three-phase voltage source, described single-phase/three-phase variable current source comprises electric current coarse adjustment circuit and current amplification circuit, described three-phase power circuit connects electric current coarse adjustment circuit, described electric current coarse adjustment circuit connects current amplification circuit, described current amplification circuit connects current output circuit, and described electric current coarse adjustment circuit connects controller; Described three-phase power circuit connects the sampling tracking circuit, described sampling tracking circuit connects phase shift amplitude circuit, described phase shift amplitude circuit connects the voltage power amplifier, described voltage power amplifier connects voltage sampling circuit, and described sampling tracking circuit, phase shift amplitude circuit are connected controller with voltage sampling circuit.
Further, described current output circuit comprises Ia, Ib and Ic, and the Ia output terminal is assembled in main box, and Ib and Ic output terminal are assembled in secondary envelope.
The beneficial effects of the utility model mainly show: 1, good reliability, can measure no-load voltage ratio and the polarity of the CT of electric substation simultaneously; 2, simple in structure, easy to carry.
Description of drawings
Fig. 1 is the circuit theory diagrams of the through-flow simulation load test of electric substation of the present utility model three-phase instrument.
Fig. 2 is the voltage segment circuit diagram.
Fig. 3 is the current segment circuit diagram.
Fig. 4 is power supply voltage stabilizing partial circuit figure.
Fig. 5 is a voltage-phase control section schematic diagram.
Fig. 6 is CPU observing and controlling partial circuit figure.
Fig. 7 is power transformer partial circuit figure.
Fig. 8 is a three-phase power supply phase sequence test section circuit diagram.
Fig. 9 is the on-the-spot elementary diagram that uses of the present utility model.
Figure 10 is a main program block diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1-Figure 10, a kind of electric substation three-phase is through-flow simulation load test instrument, comprise current output circuit 1, current sampling circuit 2, measure and control device 3 and controller 4, described current output circuit 1 connects measure and control device and current sampling circuit 2, described current output circuit 1 is connected controller 4 with current sampling circuit 2, described electric substation three-phase is through-flow, and simulation load test instrument also comprises three-phase power circuit 5, the single-phase/three-phase variable current source, three-phase voltage source, described single-phase/three-phase variable current source comprises electric current coarse adjustment circuit 6 and current amplification circuit 7, described three-phase power circuit 5 connects electric current coarse adjustment circuit 6, described electric current coarse adjustment circuit 7 connects current amplification circuit 7, described current amplification circuit 7 connects current output circuit 1, and described electric current coarse adjustment circuit 7 connects controller 4; Described three-phase power circuit 5 connects sampling tracking circuit 8, described sampling tracking circuit 8 connects phase shift amplitude circuit 9, described phase shift amplitude circuit 9 connects voltage power amplifier 10, described voltage power amplifier 10 connects voltage sampling circuit 11, and described sampling tracking circuit 9, phase shift amplitude circuit 10 are connected controller 4 with voltage sampling circuit 11.
Described current output circuit comprises Ia, Ib and Ic, and the Ia output terminal is assembled in main box, and Ib and Ic output terminal are assembled in secondary envelope.
Among Fig. 1, power unit adopts the three-phase supply power supply, and wherein the electronic circuit working power adopts the step-down of UA transformer, and the mode of rectifying and voltage-stabilizing obtains, and the accessory power supply of the various electric pressures that generation work is required provides the energy of each portions work of complete machine.
Current return is by electric current coarse adjustment relay, and electric current amplifying transformer, electric current are exported fine tuning power amplifier composition, and output terminal is introduced current sample, and this signal feedback is given CPU element, and each several part control is directly controlled by CPU.
Voltage circuit is followed the tracks of synchronously by sampling, the control of phase shift amplitude, and the voltage power amplifier is formed, and output terminal is introduced voltage sample, and this signal feedback is given CPU element, and each several part control is directly controlled by CPU.
Annexation between the each several part: the current/voltage loop is independent mutually, this two parts circuit all with CPU separately separate connection to stand-alone interface, and it is also separate with primary power separately, current return adopts the three-phase step-down power supply, voltage circuit employing ± 80V power supply, power amplifier and small-signal amplify and control section is taked the isolation coupling measure.
In embodiment illustrated in fig. 2, this partial circuit employing ± 80V is a primary power.Q101, Q102, Q103, Q104 and R103, R104, R105, R106, R107, R108, L101, R109 forms the power amplifier output stage.D101, R110, C103 forms voltage sampling circuit and links to each other with CPU voltage sample end.The voltage power amplifier promotes level employings+12V as power supply, and with T101 with two parts isolation coupling, U101 and peripheral cell are formed and are promoted grade, U-j+ comes from voltage amplitude and phase sequence control circuit.
Comprise three groups of identical voltage control circuits altogether in this instrument, be respectively Ua, Ub, Uc form three-phase voltage output jointly.
The course of work, the U-j+ signal through driving stage amplify after isolating coupler deliver to power amplification circuit and amplify again after the relatively large voltage signal of output amplitude.The three-phase output voltage Ua of this instrument just, Ub, Uc.
In the embodiment shown in fig. 3, this partial circuit directly adopts AC220V as primary power, electric current amplifying transformer T201, be multiwinding transformer, the elementary K1 that is connected to, K2, K3, K4, K5 can produce the stepping no-load voltage ratio, and secondary is two identical windings, can connect or parallel running, output voltage is 2U during series connection, and electric current is 1I; Output voltage is 1U when in parallel, and electric current is 2I.J201, J202, J203, J204 form electric current coarse adjustment switch, are directly controlled by CPU.Q201, Q202, Q203, Q204, R201, R202, R203, R204, R205, R206, D201, D202 form electric current fine tuning power output stage, the voltage signal that comes from T201 output is by D201, D202, and synchronous rectification is after power amplifier output, this partial circuit work and 0-100A, making instrument export 0-100A can be adjustable continuously, when exporting greater than 100A, CPU control J205 powers on, at this moment, instrument enters stepping and regulates, and the electric current power amplifier is deactivated after by short circuit, by J201, J202, J203, output current is regulated in the J204 stepping.D203, R212, R211, C204 forms current sampling circuit and links to each other with CPU current sample end.The electric current power amplifier promotes level employings+12V as power supply, and with T202 with two parts isolation coupling, U201 and peripheral cell are formed and are promoted level, the D/A that I-j+ comes from CPU changes output circuit.
Comprise three groups of identical current control circuits altogether in this instrument, be respectively Ia, Ib, Ic form three-phase current output jointly.
The course of work, the I-j+ signal through driving stage amplify after isolating coupler deliver to power amplification circuit and amplify again after the relatively large current signal of output amplitude.The three-phase output current Ia of this instrument just, Ib, Ic.
In the embodiment shown in fig. 4, U301, U302, U303, U304 are the three-terminal voltage-stabilizing device, and the course of work is rectification, filtering, voltage stabilizing, filtering, output.± 80V power supply is directly by AC65V * 2 rectifying and wave-filterings.
In the embodiment shown in fig. 5, R603, C601, R604, C602, R605, C603, R606, C604 forms the RC phase-shift circuit, realizes phase shift 60 degree for every grade, 120 degree of Ub phase lag Ua, 120 degree of Uc phase lag Ub.R601, R602, J601 forms voltage commutation circuit, during the J601 adhesive, the voltage that three-phase output is equated, when J601 discharges, can be by R601, R602 is provided with Ub respectively, and the magnitude of voltage of Uc forms three kinds of different voltages, can conveniently judge separate.
The course of work exports Ua-j+ to after the phase-shifted control signal capacitive coupling of being sent here by CPU, and Ua exports Ub-j+ to after 120 degree phase shifts, and the Ub signal exports Uc-j+ to after 120 degree phase shifts.
In the embodiment shown in fig. 6, U501 is CPU, and U502 is the D/A change-over circuit, all employing+12V working power.LCD501 is a display circuit, and AN1-6 is a button.Three-phase current sampled signal I-i+, three-phase voltage sampled signal U-u+, and power phase synchronizing signal 6V-1-2 all delivers to the A/D conversion input end of U501.The outer D/A change-over circuit of sheet is adopted in electric current output, is connected to each port of U502 by the I/O mouth of U501, by the output terminal of U502 through R531C505, R532C504, output three-phase current signal I-j+ behind the filtering circuit that R533C506 forms.J201, J202, J203, J204, J205, J601 is controlled by U501 respectively.
In the embodiment shown in fig. 7, T401 is the power transformer of winding more than, can export various working powers and synchro source.
In the embodiment shown in fig. 8, U701 is a power phase testing circuit, and peripheral resistance is signal attenuation resistance, prevent the chip superpotential, U701 working power employing+12V is when input UaUbUc phase sequence is correct, D701 does not light, and when input signal phase sequence mistake, D701 lights alarm.
In the embodiment shown in fig. 9, the once through-flow device of three-phase is to on-the-spot CT, PT carries out through-flow logical pressure checking, when the once through-flow device output signal of measure and control device video data and three-phase is consistent, it is correct to illustrate that external loop connects, otherwise, need to check whether each tie point is correct, can carry out on-line testing to various piece very easily.Wherein access point is selected, and the voltage access point is the corresponding access point of PT secondary after disconnecting, and the loop starting point of electric current access point for verifying all closed a floodgate the related switch in centre, with terminal point with lead with its short circuit, so that form current return.
In the embodiment shown in fig. 10, listed the workflow of CPU program.
The whole workflow introduction of instrument: the instrument working power is the three-phase four-wire system working power, and output voltage is a three-phase four-wire system, and voltage has two kinds of working methods, mode one: Ua=Ub=Uc=60V; Mode two: Ua=60, Ub=40, Uc=20.Output current is a three-phase six-wire system, by connected mode two kinds of connected modes (the outside brace of instrument switches) is arranged, mode one: series system, and this moment, output current was 1I, output voltage is 2U; Mode two: parallel way, this moment, output current was 2I, output voltage is 1U; Electric current output has dual mode by regulative mode, mode one: regulate 0-100A continuously; Mode two: stepping is regulated, and 100A-300A divides 5 grades.
After instrument powered on, system was through initialization, and each output quantity is zero,
A. change output current: when pressing electric current+(or electric current-) key operation, instrument output current will rise simultaneously (or descend), when the 0-100A scope, rise continuously, electric current changes the stepping adjusting over to up to greater than 100A the time, whenever press primary current+(or electric current-), electric current changes 40A, the three-phase current of current phase mutual deviation 120 degree.
B. change output voltage: when pressing the voltage key operation, instrument output is Ua=Ub=Uc=60V Ua=60 successively; Ub=40; Switch the three-phase voltage of phase place mutual deviation 120 degree between the Uc=20 Ua=Ub=Uc=0V.
C. change the output voltage current phase: the electric current and voltage initial phase is 0 degree, with A phase source voltage is fixed phase, when by phase place+(or phase place-) key operation, instrument output voltage phase place will change thereupon, whenever by once changing 1 degree, adjustable continuously in 0-360 degree scope, continue button and quicken to regulate, the circulation of 0-360 degree shows.
Instrument self checking and protection:
A. three-phase power supply phase sequence detects alarm, when the instrument three-phase inserts the power phase mistake, will alarm output.
B. voltage output overloading protection, CPU will judge according to magnitude of pressure differential, will cut off output and alarm during output overloading.
C. electric current output overloading protection, CPU will judge according to the output current size, will cut off output and alarm during output overloading.
D. electric current delay protection, this instrument designs for short-term operation, during big electric current output, arrives setting-up time and will cut off output and alarm.
Claims (2)
1, a kind of electric substation three-phase is through-flow simulation load test instrument, comprise current output circuit, current sampling circuit, measure and control device and controller, described current output circuit connects measure and control device and current sampling circuit, described current output circuit is connected controller with current sampling circuit, it is characterized in that: described three-phase is through-flow, and simulation load test instrument also comprises three-phase power circuit, the single-phase/three-phase variable current source, three-phase voltage source, described single-phase/three-phase variable current source comprises electric current coarse adjustment circuit and current amplification circuit, described three-phase power circuit connects electric current coarse adjustment circuit, described electric current coarse adjustment circuit connects current amplification circuit, described current amplification circuit connects current output circuit, and described electric current coarse adjustment circuit connects controller; Described three-phase power circuit connects the sampling tracking circuit, described sampling tracking circuit connects phase shift amplitude circuit, described phase shift amplitude circuit connects the voltage power amplifier, described voltage power amplifier connects voltage sampling circuit, and described sampling tracking circuit, phase shift amplitude circuit are connected controller with voltage sampling circuit.
2, the through-flow simulation load test of electric substation's three-phase as claimed in claim 1 instrument, it is characterized in that: described current output circuit comprises Ia, Ib and Ic, and the Ia output terminal is assembled in main box, and Ib and Ic output terminal are assembled in secondary envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201943978U CN201141903Y (en) | 2007-12-14 | 2007-12-14 | Load test instrument of three-phase through-flow simulation belt of transforming station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201943978U CN201141903Y (en) | 2007-12-14 | 2007-12-14 | Load test instrument of three-phase through-flow simulation belt of transforming station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201141903Y true CN201141903Y (en) | 2008-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201943978U Expired - Lifetime CN201141903Y (en) | 2007-12-14 | 2007-12-14 | Load test instrument of three-phase through-flow simulation belt of transforming station |
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| Country | Link |
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| CN (1) | CN201141903Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807355B (en) * | 2008-11-26 | 2012-01-11 | 中国石油天然气管道局 | Detection method and system for simulated operation safety precaution operation button signal of pipeline electric power substation |
| CN102323563A (en) * | 2011-09-30 | 2012-01-18 | 安徽省电力公司淮南供电公司 | Secondary current loop checking method of sealing type switching cabinet in power substation |
| CN103913715A (en) * | 2014-04-23 | 2014-07-09 | 国家电网公司 | High voltage metering box error verification system and error verification method |
| CN106405239A (en) * | 2015-07-31 | 2017-02-15 | 国家电网公司 | Phasor measurement method without load |
| CN109406907A (en) * | 2018-12-09 | 2019-03-01 | 国网辽宁省电力有限公司锦州供电公司 | High-impedance transformer simulates on-load through-flow test device and test method |
-
2007
- 2007-12-14 CN CNU2007201943978U patent/CN201141903Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807355B (en) * | 2008-11-26 | 2012-01-11 | 中国石油天然气管道局 | Detection method and system for simulated operation safety precaution operation button signal of pipeline electric power substation |
| CN102323563A (en) * | 2011-09-30 | 2012-01-18 | 安徽省电力公司淮南供电公司 | Secondary current loop checking method of sealing type switching cabinet in power substation |
| CN103913715A (en) * | 2014-04-23 | 2014-07-09 | 国家电网公司 | High voltage metering box error verification system and error verification method |
| CN106405239A (en) * | 2015-07-31 | 2017-02-15 | 国家电网公司 | Phasor measurement method without load |
| CN109406907A (en) * | 2018-12-09 | 2019-03-01 | 国网辽宁省电力有限公司锦州供电公司 | High-impedance transformer simulates on-load through-flow test device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121212 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121212 Address after: Jianggan District Qingchun Road Hangzhou city Zhejiang province 310016 No. 87 Patentee after: Zhejiang Electric Power Transmission and Transforming Engineering Co. Patentee after: State Grid Corporation of China Address before: Jianggan District Qingchun Road Hangzhou city Zhejiang province 310016 No. 87 Patentee before: Zhejiang Electric Power Transmission and Transforming Engineering Co. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081029 |