CN204945196U - Light-duty three-phase voltage generator - Google Patents
Light-duty three-phase voltage generator Download PDFInfo
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- CN204945196U CN204945196U CN201520710561.0U CN201520710561U CN204945196U CN 204945196 U CN204945196 U CN 204945196U CN 201520710561 U CN201520710561 U CN 201520710561U CN 204945196 U CN204945196 U CN 204945196U
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Abstract
Light-duty three-phase voltage generator belongs to Relay Protection Technology in Power System field, particularly relates to a kind of light-duty three-phase voltage generator.The utility model provides the light-duty three-phase voltage generator that a kind of volume weight is little, be applied to relay protection secondary circuit.The utility model comprises K switch 3, its structural feature K switch 3 one end is connected with power input terminal, K switch 3 other end is connected with the input end of automatic coupling voltage regulator T2, the output terminal of automatic coupling voltage regulator T2 is connected with the input end of isolating transformer T3, output terminal one end of isolating transformer T3 is connected with adjustable resistance R14 one end, the adjustable resistance R14 other end is connected with resistance R5 one end, and the resistance R5 other end is connected with resistance R6 one end, adjustable resistance R10 one end, output voltage terminals UA respectively.
Description
Technical field
The utility model belongs to Relay Protection Technology in Power System field, particularly relates to a kind of light-duty three-phase voltage generator.
Background technology
At present along with the construction of a large amount of intelligent substation; protection sampling is carried out in merge cells; place dispersion when utilizing relay protection microcomputer test instrument to add fault amount to protective device; sometimes need the microcomputer test instrument of four or five ten jin of weights work place downstairs to shift from one place to another upstairs, requiring great effort time-consumingly has a strong impact on work efficiency.
Some occasion; especially 66KV intelligent substation is when protective debugging; only need to add the test that one group of three-phase main-frequency test current carries out protecting definite value or measured value; 66KV side power up place at 66KV switch cubicle terminal block place; 10KV side is then at the 10KV bus place at main transformer secondary switch place, and work place is discrete, needs the Microcomputer Protection test instrument of tens kilogram weights; shift from one place to another in different location, effort time consuming work efficiency is low.
Summary of the invention
The utility model is exactly for the problems referred to above, provides the light-duty three-phase voltage generator that a kind of volume weight is little, be applied to relay protection secondary circuit.
For achieving the above object, the utility model adopts following technical scheme, the utility model comprises K switch 3, its structural feature K switch 3 one end is connected with power input terminal, K switch 3 other end is connected with the input end of automatic coupling voltage regulator T2, the output terminal of automatic coupling voltage regulator T2 is connected with the input end of isolating transformer T3, output terminal one end of isolating transformer T3 is connected with adjustable resistance R14 one end, the adjustable resistance R14 other end is connected with resistance R5 one end, and the resistance R5 other end is connected with resistance R6 one end, adjustable resistance R10 one end, output voltage terminals UA respectively, the resistance R6 other end respectively with the output terminal center tap of isolating transformer T3, electric capacity C7 one end, adjustable resistance R12 one end, ground wire, electric capacity C11 one end, terminal UN is connected, the electric capacity C11 other end is connected with the adjustable resistance R10 other end, the electric capacity C7 other end respectively with adjustable resistance R8 one end, output voltage terminals UC is connected, the adjustable resistance R8 other end is connected with resistance R9 one end, the resistance R9 other end respectively with the output terminal other end of isolating transformer T3, electric capacity C14 one end is connected, the electric capacity C14 other end respectively with resistance R13 one end, output voltage terminals UB is connected, the resistance R13 other end is connected with the adjustable resistance R12 other end.
As a kind of preferred version, K switch 3 described in the utility model adopts 2A sky to open.
As another kind of preferred version, automatic coupling voltage regulator T2 described in the utility model adopts 50W automatic coupling voltage regulator.
As another kind of preferred version, isolating transformer T3 described in the utility model adopts 50W, no-load voltage ratio is the isolating transformer of 220/120/120.
Secondly, adjustable resistance R14 described in the utility model adopts 200 Europe, 5W adjustable resistance, resistance R5 adopts 0.5K Europe, 50W fixed resistance, resistance R6 adopts 0.6K ohm, 50W fixed resistance, electric capacity C7 adopts 5 μ F, 400VAC electric capacity, resistance R8 adopts 200 Europe, 5W adjustable resistance, resistance R9 adopts 1K Europe, 50W fixed resistance, resistance R10 adopts 200 Europe, 5W adjustable resistance, electric capacity C11 adopts 1 μ F, 400VAC electric capacity, resistance R12 adopts 200 Europe, 5W adjustable resistance, resistance R13 adopts 0.5K Europe, 50W fixed resistance, electric capacity C14 adopts 1 μ F, 400VAC electric capacity.
In addition, output voltage terminals UA described in the utility model is connected with the UA terminal of protection terminal block, and output voltage terminals UB is connected with the UB terminal of protection terminal block, and output voltage terminals UC is connected with the UC terminal of protection terminal block.
The utility model beneficial effect.
The utility model can in the engineering debug of digital transformer substation and Generic Substation, to the debugging of backup auto-activating device, the fixed value checking of route protection, and the effect that remote measurement amount waits performance to get twice the result with half the effort to examination.Draw through lot of experiments, parameter index of the present utility model meets the needs of protective debugging, and the utility model output power meets load-carrying requirement, and the voltage waveform that the utility model exports is the sine wave of standard.The utility model can meet the carrying load ability under all relay protection alternating voltage secondary circuit loading conditions, and meets error requirements.The utility model can be applicable in relay protection secondary circuit, is linked in protection terminal block.
The utility model R14, R5, R6 tri-resistance can produce UA phase voltage by voltage divider principle; It is equal that C7, R8, R9 can produce amplitude by capacitance-resistance parameter adjustment, and phase place is ahead of the UB phase voltage that UA is 240 degree; It is equal that R12, R13, C14 can produce amplitude by capacitance-resistance parameter adjustment, and phase place is ahead of the UC phase voltage that UA is 120 degree.The utility model R10, C11 loop can be finely tuned UA phase phase place, so that the requirement in the symmetrical precision of the decision reaching the phase place of UA, UB, UC.
Small-sized, light-duty low-power transformer is combined with resistive-capacitive voltage divider loop and produces three-phase voltage by the utility model patent, for the test of relay protection of power system secondary circuit provides required three-phase alternating current symmetrical voltage; The volume of test apparatus and weight are reduced all greatly.
The utility model without the need to adopting the links such as traditional inversion, rectification, power amplification, and just adopts the link such as step-down and resistive-capacitive voltage divider, and loop forms simple.
The utility model three-phase voltage output loop be short-circuited phenomenon time, at all can not damage whole voltage generating loop, short circuit phenomenon eliminate after, generator can recover normal immediately.
The utility model can be applicable to high impedance components and parts and loop.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further.The utility model protection domain is not only confined to the statement of following content.
Fig. 1 is the utility model circuit theory diagrams.
Fig. 2 is the application connection layout of the utility model in relay protection work.
Fig. 3 is the utility model light-duty three-phase current generator circuit theory diagrams.
Fig. 4 is the voltage vector diagram after the utility model three-phase voltage generating loop access protection voltage circuit.
Embodiment
As shown in the figure, the utility model comprises K switch 3, K switch 3 one end is connected with power input terminal, K switch 3 other end is connected with the input end of automatic coupling voltage regulator T2, the output terminal of automatic coupling voltage regulator T2 is connected with the input end of isolating transformer T3, output terminal one end of isolating transformer T3 is connected with adjustable resistance R14 one end, and the adjustable resistance R14 other end is connected with resistance R5 one end, and the resistance R5 other end is connected with resistance R6 one end, adjustable resistance R10 one end, output voltage terminals UA respectively, the resistance R6 other end respectively with the output terminal center tap of isolating transformer T3, electric capacity C7 one end, adjustable resistance R12 one end, ground wire, electric capacity C11 one end, terminal UN is connected, the electric capacity C11 other end is connected with the adjustable resistance R10 other end, the electric capacity C7 other end respectively with adjustable resistance R8 one end, output voltage terminals UC is connected, the adjustable resistance R8 other end is connected with resistance R9 one end, the resistance R9 other end respectively with the output terminal other end of isolating transformer T3, electric capacity C14 one end is connected, the electric capacity C14 other end respectively with resistance R13 one end, output voltage terminals UB is connected, the resistance R13 other end is connected with the adjustable resistance R12 other end.
Described K switch 3 adopts 2A sky to open.
Described automatic coupling voltage regulator T2 adopts 50W automatic coupling voltage regulator.
Described isolating transformer T3 adopts 50W, no-load voltage ratio is the isolating transformer of 220/120/120.The utility model, by single-phase 220 volts of alternating voltages, is transformed to and can meets the symmetrical trial voltage of three-phase alternating current needed for relay protection of power system specialty instead of single-phase AC voltage.
Described adjustable resistance R14 adopts 200 Europe, 5W adjustable resistance, resistance R5 adopts 0.5K Europe, 50W fixed resistance, resistance R6 adopts 0.6K ohm, 50W fixed resistance, electric capacity C7 adopts 5 μ F, 400VAC electric capacity, resistance R8 adopts 200 Europe, 5W adjustable resistance, resistance R9 adopts 1K Europe, 50W fixed resistance, resistance R10 adopts 200 Europe, 5W adjustable resistance, electric capacity C11 adopts 1 μ F, 400VAC electric capacity, resistance R12 adopts 200 Europe, 5W adjustable resistance, resistance R13 adopts 0.5K Europe, 50W fixed resistance, and electric capacity C14 adopts 1 μ F, 400VAC electric capacity.By the configuration of lot of experiments determination above-mentioned parameter, when loaded impedance is 20K ohm, by the loop of above-mentioned parameter configuration, band can produce the error being not more than 3% after carrying, and load capacity is strong, meets the thermally-stabilised requirement of long-time running.
Described output voltage terminals UA is connected with the UA terminal of protection terminal block, and output voltage terminals UB is connected with the UB terminal of protection terminal block, and output voltage terminals UC is connected with the UC terminal of protection terminal block.
The utility model can with light-duty three-phase current generator with the use of.
Described light-duty three-phase current generator comprises K switch 1, the input end of K switch 1 is connected with alternating current input terminal, the output terminal of K switch 1 is connected with the input end of automatic coupling voltage regulator T1, the output terminal of automatic coupling voltage regulator T1 is connected with the input end of isolating transformer T4, output terminal one end of isolating transformer T4 is A phase output terminal, and A phase output terminal is connected with A phase current lead-out terminal by electric capacity C1, adjustable resistance R1, resistance R2 successively; First tap of isolating transformer T4 is B phase output terminal, and B phase output terminal is connected with B phase current lead-out terminal by K switch 2; Second tap of isolating transformer T4 is C phase output terminal, and the C phase of isolating transformer T4 is exported and is connected with C phase current lead-out terminal by resistance R3, adjustable resistance R4.The light-duty three-phase current generator of the utility model can in the engineering debug of digital transformer substation and Generic Substation, to the debugging of backup auto-activating device, the fixed value checking of route protection, and the effect that remote measurement amount waits performance to get twice the result with half the effort to examination.Draw through lot of experiments; the parameter index of the light-duty three-phase current generator of the utility model meets the needs of protective debugging; the utility model light-duty three-phase current generator output power meets load-carrying requirement, and the current waveform that the light-duty three-phase current generator of the utility model exports is the sine wave of standard.The utility model light-duty three-phase current generator can meet the carrying load ability under all relay protection alternating current secondary circuit loading conditions, and meets error requirements.The light-duty three-phase current generator of the utility model can be applicable in relay protection secondary circuit, is linked in protection terminal block.
The light-duty three-phase current generator of the utility model makes the resistance sum of adjustable resistance R1 and resistance R2 equal 1/ of electric capacity C1 capacitive reactance by the size of adjustment adjustable resistance R1
doubly, electric capacity C1, adjustable resistance R1, resistance R2 combination adjustment IA phase current size and phase place make the advanced IC240 degree of IA.Resistance R3 is combined with adjustable resistance R4 and adjusts IC phase current size.
Small-sized, light-duty low-power transformer, current transformer and phase place are adjusted loop and are combined and produce three-phase alternating current, for the test of relay protection of power system secondary circuit provides required three-phase alternating current symmetrical current by the utility model light-duty three-phase current generator.So, the volume of test apparatus and weight is made all can to reduce more than ten times.The utility model light-duty three-phase current generator size is equivalent to common multimeter size.
Use the three-phase alternating current test current that the light-duty three-phase current generator of the utility model produces, without the need to adopting the links such as traditional inversion, rectification, power amplification, and just adopt the links such as pressure regulation, phase place adjustment and unsteady flow, loop forms simple.
Described K switch 2 adopts three-position switch, the struck side A of three-position switch is connected with described B phase output terminal, the stiff end B of three-position switch is connected with described B phase current lead-out terminal, the stiff end C of three-position switch is connected with spare terminal, the stiff end D of three-position switch is connected with input end one end of power pack T5, the input end other end of power pack T5 and described isolating transformer T4 the output terminal other end be connected, the output terminal of power pack T5 is connected with fixed value checking terminal.Three-position switch has
,
, 0 three positions, when beating
during position, terminal AB leads to, and connects IB phase current output loop; When beating
during position, AD leads to, and connects the output loop of big current; When beating in 0 position, AC leads to, and now no current exports, and C is spare terminal.Power pack T5 part is single-phase High-current output loop, and this loop can provide the fixed value checking function of overcurrent, fast tripping protection as subsidiary loop.
Described isolating transformer T4 adopts 200W isolating transformer; The no-load voltage ratio of isolating transformer T4 is 220V/60V/60V/90V, when the input terminal voltage of isolating transformer T4 is 220V, between described B phase output terminal and A phase output terminal, voltage is 60V, between described C phase output terminal and B phase output terminal, voltage is 60V, described isolating transformer T4 the output terminal other end and C phase output terminal between voltage be 90V.The utility model light-duty three-phase current generator innovative point is embodied in: by single-phase 220 volts of alternating currents, by the simplest means, is transformed to the symmetrical test current of three-phase alternating current that can meet needed for relay protection of power system specialty.
Described power pack T5 adopts primary turns 25, number of secondary turns 5 circle, 50 watts of power current transducers.Adopt 50 watts of light-duty power packs of low-power, the volume and weight of the light-duty three-phase current generator of the utility model can be reduced further.
Described K switch 1 adopts 2A to exchange sky and opens.
Described A phase current lead-out terminal is connected with the IA terminal of protection terminal block, and B phase current lead-out terminal is connected with the IB terminal of protection terminal block, and C phase current lead-out terminal is connected with the IC terminal of protection terminal block.
Described automatic coupling voltage regulator T1 adopts 200W, 220V/250V automatic coupling voltage regulator.Adopt 200W automatic coupling voltage regulator and 200W isolating transformer T4 to cooperatively interact, be convenient to limit the waveform of output current; The current waveform of output is made to be unsaturated, undistorted sine wave.
Described electric capacity C1 adopts 122 microfarads, 400VAC electric capacity, and adjustable resistance R1 adopts 10 ohm of 50 watts of adjustable resistances, and resistance R3 adopts the fixed resistance of 20 ohm of 50W, and adjustable resistance R4 adopts 15 ohm of 50 watts of adjustable resistances.Coordinated by above-mentioned parameter, IA, IB, IC output current of three-phase symmetrical and the single-phase current of a road 20A that one group of output is 1A can be adjusted.
Be understandable that, above about these specific descriptions of the present utility model, the technical scheme described by this utility model embodiment is only not limited to for illustration of this utility model, those of ordinary skill in the art is to be understood that, still can modify to this utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within this protection domain of the present utility model as long as meet.
Claims (6)
1. light-duty three-phase voltage generator, comprise K switch 3, it is characterized in that K switch 3 one end is connected with power input terminal, K switch 3 other end is connected with the input end of automatic coupling voltage regulator T2, the output terminal of automatic coupling voltage regulator T2 is connected with the input end of isolating transformer T3, output terminal one end of isolating transformer T3 is connected with adjustable resistance R14 one end, the adjustable resistance R14 other end is connected with resistance R5 one end, and the resistance R5 other end is connected with resistance R6 one end, adjustable resistance R10 one end, output voltage terminals UA respectively, the resistance R6 other end respectively with the output terminal center tap of isolating transformer T3, electric capacity C7 one end, adjustable resistance R12 one end, ground wire, electric capacity C11 one end, terminal UN is connected, the electric capacity C11 other end is connected with the adjustable resistance R10 other end, the electric capacity C7 other end respectively with adjustable resistance R8 one end, output voltage terminals UC is connected, the adjustable resistance R8 other end is connected with resistance R9 one end, the resistance R9 other end respectively with the output terminal other end of isolating transformer T3, electric capacity C14 one end is connected, the electric capacity C14 other end respectively with resistance R13 one end, output voltage terminals UB is connected, the resistance R13 other end is connected with the adjustable resistance R12 other end.
2. light-duty three-phase voltage generator according to claim 1, is characterized in that described K switch 3 adopts 2A sky to open.
3. light-duty three-phase voltage generator according to claim 1, is characterized in that described automatic coupling voltage regulator T2 adopts 50W automatic coupling voltage regulator.
4. light-duty three-phase voltage generator according to claim 1, is characterized in that described isolating transformer T3 adopts 50W, no-load voltage ratio is the isolating transformer of 220/120/120.
5. light-duty three-phase voltage generator according to claim 1, it is characterized in that described adjustable resistance R14 adopts 200 Europe, 5W adjustable resistance, resistance R5 adopts 0.5K Europe, 50W fixed resistance, resistance R6 adopts 0.6K ohm, 50W fixed resistance, electric capacity C7 adopts 5 μ F, 400VAC electric capacity, resistance R8 adopts 200 Europe, 5W adjustable resistance, resistance R9 adopts 1K Europe, 50W fixed resistance, resistance R10 adopts 200 Europe, 5W adjustable resistance, electric capacity C11 adopts 1 μ F, 400VAC electric capacity, resistance R12 adopts 200 Europe, 5W adjustable resistance, resistance R13 adopts 0.5K Europe, 50W fixed resistance, electric capacity C14 adopts 1 μ F, 400VAC electric capacity.
6. light-duty three-phase voltage generator according to claim 1; it is characterized in that described output voltage terminals UA is connected with the UA terminal of protection terminal block; output voltage terminals UB is connected with the UB terminal of protection terminal block, and output voltage terminals UC is connected with the UC terminal of protection terminal block.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710561.0U CN204945196U (en) | 2015-09-15 | 2015-09-15 | Light-duty three-phase voltage generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710561.0U CN204945196U (en) | 2015-09-15 | 2015-09-15 | Light-duty three-phase voltage generator |
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| CN204945196U true CN204945196U (en) | 2016-01-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526258A (en) * | 2015-09-15 | 2017-03-22 | 国网辽宁省电力有限公司沈阳供电公司 | Light three-phase voltage generator |
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2015
- 2015-09-15 CN CN201520710561.0U patent/CN204945196U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526258A (en) * | 2015-09-15 | 2017-03-22 | 国网辽宁省电力有限公司沈阳供电公司 | Light three-phase voltage generator |
| CN106526258B (en) * | 2015-09-15 | 2023-06-09 | 国网辽宁省电力有限公司沈阳供电公司 | Light three-phase voltage generator |
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