CN204945277U - Light-duty three-phase voltage current generator - Google Patents
Light-duty three-phase voltage current generator Download PDFInfo
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- CN204945277U CN204945277U CN201520710713.7U CN201520710713U CN204945277U CN 204945277 U CN204945277 U CN 204945277U CN 201520710713 U CN201520710713 U CN 201520710713U CN 204945277 U CN204945277 U CN 204945277U
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Abstract
Light-duty three-phase voltage current generator belongs to Relay Protection Technology in Power System field, particularly relates to a kind of light-duty three-phase voltage current generator.The utility model provides the light-duty three-phase voltage current generator that a kind of volume weight is little, be applied to relay protection secondary circuit.The utility model comprises three-phase alternating voltage and forms loop and three-phase alternating current formation loop, its structural feature three-phase alternating voltage forms loop and comprises K switch 1, K switch 1 one end is connected with power input terminal, K switch 1 other end is connected with the input end from lotus root pressure regulator T2, be connected with the input end of isolating transformer T3 from the output terminal of lotus root pressure regulator T2, output terminal one end of isolating transformer T3 is connected with resistance R5 one end, and the resistance R5 other end is connected with adjustable resistance R6 one end, resistance R11 one end, output voltage terminals UA respectively; The adjustable resistance R6 other end is connected with resistance R7 one end.
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 current 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 current 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 three-phase alternating voltage and forms loop and three-phase alternating current formation loop, its structural feature three-phase alternating voltage forms loop and comprises K switch 1, K switch 1 one end is connected with power input terminal, K switch 1 other end is connected with the input end from lotus root pressure regulator T2, be connected with the input end of isolating transformer T3 from the output terminal of lotus root pressure regulator T2, output terminal one end of isolating transformer T3 is connected with resistance R5 one end, the resistance R5 other end respectively with adjustable resistance R6 one end, resistance R11 one end, output voltage terminals UA is connected, the adjustable resistance R6 other end is connected with resistance R7 one end, the resistance R7 other end respectively with the output terminal tap of isolating transformer, electric capacity C12 one end, adjustable resistance R13 one end, electric capacity C8 one end, terminal UN is connected, the electric capacity C12 other end is connected with the resistance R11 other end, the electric capacity C8 other end respectively with adjustable resistance R9 one end, output voltage terminals UC is connected, the adjustable resistance R9 other end is connected with resistance R10 one end, the resistance R10 other end respectively with the output terminal other end of isolating transformer T3, electric capacity C15 one end is connected, the electric capacity C15 other end respectively with resistance R14 one end, output voltage terminals UB is connected, the resistance R14 other end is connected with the adjustable resistance R13 other end.
Described three-phase alternating current forms loop and comprises isolating transformer T4, isolating transformer T4 input end is connected with the input end of described isolating transformer T3, 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 adjustable resistance R16, resistance R17 successively; First tap of isolating transformer T4 is C phase output terminal, and C phase output terminal is connected with C phase current lead-out terminal by K switch 18; Second tap of isolating transformer T4 is B phase output terminal, and B phase is exported successively and is connected with B phase current lead-out terminal by adjustable resistance R19, resistance R20, electric capacity C21.
Described output voltage terminals UA is connected with the UA terminal of connection terminal panel J23, and output voltage terminals UB is connected with the UB terminal of connection terminal panel J23, and output voltage terminals UC is connected with the UC terminal of connection terminal panel J23; Described A phase current lead-out terminal is connected with the IA terminal of connection terminal panel J23, and B phase current lead-out terminal is connected with the IB terminal of connection terminal panel J23, and C phase current lead-out terminal is connected with the IC terminal of connection terminal panel J23.
As a kind of preferred version, K switch 1 described in the utility model adopts 2A sky to open.
As another kind of preferred version, described in the utility model from lotus root pressure regulator T2 adopt 200W, 0-250V from lotus root pressure regulator.
As another kind of preferred version, the isolating transformer that isolating transformer T3 described in the utility model adopts 50W, no-load voltage ratio is the isolating transformer of 220/90/120; 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 C 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 B phase output terminal between voltage be 90V.
As another kind of preferred version, K switch 18 described in the utility model adopts two-position switch, the struck side A of two-position switch is connected with described C phase output terminal, the stiff end B of two-position switch is connected with described C phase current lead-out terminal, the stiff end C of two-position switch is connected with input end one end of power pack T22, the input end other end of power pack T22 is connected with the output terminal other end of described isolating transformer T4, output terminal one end of power pack T22 is connected with the ID terminal of connection terminal panel J23, the output terminal other end of power pack T22 is connected with the IN terminal of connection terminal panel J23.
As another kind of preferred version, power pack T22 described in the utility model adopts elementary 30 circles, secondary 6 circles, power to be the power pack of 100W.
As another kind of preferred version, resistance R5 described in the utility model is 0.5K, 50W fixed resistance, adjustable resistance R6, R9 is 0.2K, 5W adjustable resistance, resistance R7 is 0.4K, 50W fixed resistance, electric capacity C8 is 5 μ F, 400VAC electric capacity, resistance R10 is 1.0K, 50W fixed resistance, resistance R11 is 0.1K, 5W fixed resistance, electric capacity C12 is 1 μ F, 400VAC electric capacity, adjustable resistance R13 is 0.2K, 5W adjustable resistance, resistance R14 is 0.5K, 50W fixed resistance, electric capacity C15 is 1 μ F, 400VAC electric capacity, adjustable resistance R16 is 15 Europe, 50W adjustable resistance, resistance R17 is 20 Europe, 50W fixed resistance, adjustable resistance R19 is 10 ohm, 50 watts of adjustable resistances, resistance R20 is 15 ohm, 50 watts of fixed resistances, electric capacity C21 is 122 μ F, 400VAC electric capacity.
Secondly, the output terminal other end of adjustable resistance R16 one end described in the utility model, C phase output terminal, B phase output terminal, T4 is connected with check test terminal.
In addition, output voltage terminals UA described in the utility model, output voltage terminals UB, output voltage terminals UC, A phase current lead-out terminal, B phase current lead-out terminal, C phase current lead-out terminal are connected with the input port of LCDs respectively.
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 that the utility model exports, current waveform are the sine wave of standard.The utility model has the function that voltage secondary circuit short circuit can not damage secondary circuit and components and parts.The utility model can meet the carrying load ability under all relay protection alternating voltages, electric current secondary loop loading condition, and meets error requirements.The utility model can be applicable in relay protection secondary circuit, is linked in protection terminal block.
The utility model three-phase current generating loop adopts light-duty, low-power electromagnetic sensor transformer, capacitance-resistance tune stream, phase modulation loop composition.
The utility model utilizes noninductive resistance element and high-accuracy capacitor element, meets the requirement of precision and stability.
Small-sized, light-duty low-power transformer and resistive-capacitive voltage divider loop are combined into relay protection of power system secondary circuit and test the three-phase alternating current symmetrical voltage and three-phase alternating current symmetrical current that provide required by the utility model; Make that the volume of test apparatus and weight reduce all greatly, loop simplifies greatly, for ease of maintenaince.
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 and electric current instead of single-phase AC voltage and electric current.
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, Current adjustment and phase modulation, and loop forms simple, and has enough carrying load abilities and precision.
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 voltage vector diagram after the utility model three-phase voltage generating loop access protection voltage circuit.
Fig. 3 is the voltage vector diagram behind the utility model three-phase current generating loop access protective current loop.
Embodiment
As shown in the figure, the utility model comprises three-phase alternating voltage and forms loop and three-phase alternating current formation loop, three-phase alternating voltage forms loop and comprises K switch 1, K switch 1 one end is connected with power input terminal, K switch 1 other end is connected with the input end from lotus root pressure regulator T2, be connected with the input end of isolating transformer T3 from the output terminal of lotus root pressure regulator T2, output terminal one end of isolating transformer T3 is connected with resistance R5 one end, and the resistance R5 other end is connected with adjustable resistance R6 one end, resistance R11 one end, output voltage terminals UA respectively, the adjustable resistance R6 other end is connected with resistance R7 one end, the resistance R7 other end respectively with the output terminal tap of isolating transformer, electric capacity C12 one end, adjustable resistance R13 one end, electric capacity C8 one end, terminal UN is connected, the electric capacity C12 other end is connected with the resistance R11 other end, the electric capacity C8 other end respectively with adjustable resistance R9 one end, output voltage terminals UC is connected, the adjustable resistance R9 other end is connected with resistance R10 one end, the resistance R10 other end respectively with the output terminal other end of isolating transformer T3, electric capacity C15 one end is connected, the electric capacity C15 other end respectively with resistance R14 one end, output voltage terminals UB is connected, the resistance R14 other end is connected with the adjustable resistance R13 other end.
Described three-phase alternating current forms loop and comprises isolating transformer T4, isolating transformer T4 input end is connected with the input end of described isolating transformer T3, 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 adjustable resistance R16, resistance R17 successively; First tap of isolating transformer T4 is C phase output terminal, and C phase output terminal is connected with C phase current lead-out terminal by K switch 18; Second tap of isolating transformer T4 is B phase output terminal, and B phase is exported successively and is connected with B phase current lead-out terminal by adjustable resistance R19, resistance R20, electric capacity C21.
Described output voltage terminals UA is connected with the UA terminal of connection terminal panel J23, and output voltage terminals UB is connected with the UB terminal of connection terminal panel J23, and output voltage terminals UC is connected with the UC terminal of connection terminal panel J23; Described A phase current lead-out terminal is connected with the IA terminal of connection terminal panel J23, and B phase current lead-out terminal is connected with the IB terminal of connection terminal panel J23, and C phase current lead-out terminal is connected with the IC terminal of connection terminal panel J23.
Described K switch 1 adopts 2A sky to open.
Described from lotus root pressure regulator T2 adopt 200W, 0-250V from lotus root pressure regulator.
The isolating transformer that described isolating transformer T3 adopts 50W, no-load voltage ratio is the isolating transformer of 220/90/120; 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 C 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 B phase output terminal between voltage be 90V.Adopt 200W to cooperatively interact from lotus root pressure regulator T2 and 200W isolating transformer T4, be convenient to limit the waveform of output current; The current waveform of output is made to be unsaturated, undistorted sine wave.
Described K switch 18 adopts two-position switch, the struck side A of two-position switch is connected with described C phase output terminal, the stiff end B of two-position switch is connected with described C phase current lead-out terminal, the stiff end C of two-position switch is connected with input end one end of power pack T22, the input end other end of power pack T22 is connected with the output terminal other end of described isolating transformer T4, output terminal one end of power pack T22 is connected with the ID terminal of connection terminal panel J23, and the output terminal other end of power pack T22 is connected with the IN terminal of connection terminal panel J23.In figure, K1, T2, T4, K18, T22 element constitutes single-phase big current generating loop and exports ID electric current, and can export the AC sine wave electric current of maximum 20 amperes according to aforementioned parameters, this electric current may be used for the test of quick-break, overcurrent protection.
Described power pack T22 adopts elementary 30 circles, secondary 6 circles, power to be the power pack of 100W.
Described resistance R5 is 0.5K, 50W fixed resistance, adjustable resistance R6, R9 is 0.2K, 5W adjustable resistance, resistance R7 is 0.4K, 50W fixed resistance, electric capacity C8 is 5 μ F, 400VAC electric capacity, resistance R10 is 1.0K, 50W fixed resistance, resistance R11 is 0.1K, 5W fixed resistance, electric capacity C12 is 1 μ F, 400VAC electric capacity, adjustable resistance R13 is 0.2K, 5W adjustable resistance, resistance R14 is 0.5K, 50W fixed resistance, electric capacity C15 is 1 μ F, 400VAC electric capacity, adjustable resistance R16 is 15 Europe, 50W adjustable resistance, resistance R17 is 20 Europe, 50W fixed resistance, adjustable resistance R19 is 10 ohm of 50 watts of adjustable resistances, resistance R20 is 15 ohm, 50 watts of fixed resistances, electric capacity C21 is 122 μ F, 400VAC electric capacity.R5, R6, R7, R11, C12 can adjust the UA phase voltage of 0-65 volt left and right according to aforementioned parameters configuration; The UC phase voltage that C8, R9, R10 can adjust 0-65 volt left and right according to aforementioned parameters configuration, advanced UA is 120 degree; The UB phase voltage that R13, R14, C15 can adjust 0-65 volt left and right according to aforementioned parameters configuration, advanced UA is 240 degree.Three-phase voltage symmetry can be made to reach 99% by parameter adjustment.Utilize the utility model three-phase voltage can carry out the low-voltage test of prepared auto restart, transformer, capacitor, bus differential protection.
T4, R16, R17 can adjust the IA phase current of about 0-1.5A according to aforementioned parameters configuration; The IB phase voltage that T4, K18, R19, R20, C21 can adjust about 0-1.5A according to aforementioned parameters configuration, advanced IA is 240 degree; Two-position switch to be beaten I time A-B and is led to, and obtains IC phase current, IC electric current be IA, IB electric current phasor and negative value.Adopt above-mentioned parameter, the symmetry of the utility model three-phase symmetrical electric current is 99%.The power measurement values can carrying out protective device is debugged, prepared auto restart or some protective device have tests such as flowing locking to utilize the utility model three-phase current to be combined with three-phase voltage.
The output terminal other end of described adjustable resistance R16 one end, C phase output terminal, B phase output terminal, T4 is connected with check test terminal.In figure, A, B, C, N terminal can export the voltage of one group 120 volts, 60 volts, 90 volts different voltage values, for carrying out no-load voltage ratio, polarity check test and current transformer, voltage transformer (VT) one or two full loop systematicness whole group of check test to voltage transformer (VT) and current transformer.
Described output voltage terminals UA, output voltage terminals UB, output voltage terminals UC, A phase current lead-out terminal, B phase current lead-out terminal, C phase current lead-out terminal are connected with the input port of LCDs respectively.By the utility model three-phase voltage, current output terminal access LCDs, the size of each phase current, voltage directly can be observed.
The utility model can carry out that protective device is gained merit, the debugging of reactive power measurement value, the low-voltage variation such as debugging, the capacitor debugging of prepared auto restart, overcurrent protection debugging, current transformer, the no-load voltage ratio of voltage transformer (VT), polarity test, voltage and current transformer one or two full loops whole group of property check test etc.
Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.
Claims (9)
1. light-duty three-phase voltage current generator, comprise three-phase alternating voltage and form loop and three-phase alternating current formation loop, it is characterized in that three-phase alternating voltage forms loop and comprises K switch 1, K switch 1 one end is connected with power input terminal, K switch 1 other end is connected with the input end from lotus root pressure regulator T2, be connected with the input end of isolating transformer T3 from the output terminal of lotus root pressure regulator T2, output terminal one end of isolating transformer T3 is connected with resistance R5 one end, and the resistance R5 other end is connected with adjustable resistance R6 one end, resistance R11 one end, output voltage terminals UA respectively, the adjustable resistance R6 other end is connected with resistance R7 one end, the resistance R7 other end respectively with the output terminal tap of isolating transformer, electric capacity C12 one end, adjustable resistance R13 one end, electric capacity C8 one end, terminal UN is connected, the electric capacity C12 other end is connected with the resistance R11 other end, the electric capacity C8 other end respectively with adjustable resistance R9 one end, output voltage terminals UC is connected, the adjustable resistance R9 other end is connected with resistance R10 one end, the resistance R10 other end respectively with the output terminal other end of isolating transformer T3, electric capacity C15 one end is connected, the electric capacity C15 other end respectively with resistance R14 one end, output voltage terminals UB is connected, the resistance R14 other end is connected with the adjustable resistance R13 other end,
Described three-phase alternating current forms loop and comprises isolating transformer T4, isolating transformer T4 input end is connected with the input end of described isolating transformer T3, 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 adjustable resistance R16, resistance R17 successively; First tap of isolating transformer T4 is C phase output terminal, and C phase output terminal is connected with C phase current lead-out terminal by K switch 18; Second tap of isolating transformer T4 is B phase output terminal, and B phase is exported successively and is connected with B phase current lead-out terminal by adjustable resistance R19, resistance R20, electric capacity C21;
Described output voltage terminals UA is connected with the UA terminal of connection terminal panel J23, and output voltage terminals UB is connected with the UB terminal of connection terminal panel J23, and output voltage terminals UC is connected with the UC terminal of connection terminal panel J23; Described A phase current lead-out terminal is connected with the IA terminal of connection terminal panel J23, and B phase current lead-out terminal is connected with the IB terminal of connection terminal panel J23, and C phase current lead-out terminal is connected with the IC terminal of connection terminal panel J23.
2. light-duty three-phase voltage current generator according to claim 1, is characterized in that described K switch 1 adopts 2A sky to open.
3. light-duty three-phase voltage current generator according to claim 1, is characterized in that describedly adopting 200W, 0-250V from lotus root pressure regulator from lotus root pressure regulator T2.
4. light-duty three-phase voltage current generator according to claim 1, is characterized in that the isolating transformer that described isolating transformer T3 adopts 50W, no-load voltage ratio is the isolating transformer of 220/90/120; 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 C 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 B phase output terminal between voltage be 90V.
5. light-duty three-phase voltage current generator according to claim 1, it is characterized in that described K switch 18 adopts two-position switch, the struck side A of two-position switch is connected with described C phase output terminal, the stiff end B of two-position switch is connected with described C phase current lead-out terminal, the stiff end C of two-position switch is connected with input end one end of power pack T22, the input end other end of power pack T22 is connected with the output terminal other end of described isolating transformer T4, output terminal one end of power pack T22 is connected with the ID terminal of connection terminal panel J23, the output terminal other end of power pack T22 is connected with the IN terminal of connection terminal panel J23.
6. light-duty three-phase voltage current generator according to claim 5, is characterized in that described power pack T22 adopts elementary 30 circles, secondary 6 circles, power to be the power pack of 100W.
7. light-duty three-phase voltage current generator according to claim 1, it is characterized in that described resistance R5 is 0.5K, 50W fixed resistance, adjustable resistance R6, R9 is 0.2K, 5W adjustable resistance, resistance R7 is 0.4K, 50W fixed resistance, electric capacity C8 is 5 μ F, 400VAC electric capacity, resistance R10 is 1.0K, 50W fixed resistance, resistance R11 is 0.1K, 5W fixed resistance, electric capacity C12 is 1 μ F, 400VAC electric capacity, adjustable resistance R13 is 0.2K, 5W adjustable resistance, resistance R14 is 0.5K, 50W fixed resistance, electric capacity C15 is 1 μ F, 400VAC electric capacity, adjustable resistance R16 is 15 Europe, 50W adjustable resistance, resistance R17 is 20 Europe, 50W fixed resistance, adjustable resistance R19 is 10 ohm, 50 watts of adjustable resistances, resistance R20 is 15 ohm, 50 watts of fixed resistances, electric capacity C21 is 122 μ F, 400VAC electric capacity.
8. light-duty three-phase voltage current generator according to claim 1, it is characterized in that described adjustable resistance R16 one end, C phase output terminal, B phase output terminal, T4 the output terminal other end be connected with check test terminal.
9. light-duty three-phase voltage current generator according to claim 1, is characterized in that described output voltage terminals UA, output voltage terminals UB, output voltage terminals UC, A phase current lead-out terminal, B phase current lead-out terminal, C phase current lead-out terminal are connected with the input port of LCDs respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710713.7U CN204945277U (en) | 2015-09-15 | 2015-09-15 | Light-duty three-phase voltage current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710713.7U CN204945277U (en) | 2015-09-15 | 2015-09-15 | Light-duty three-phase voltage current generator |
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| Publication Number | Publication Date |
|---|---|
| CN204945277U true CN204945277U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520710713.7U Withdrawn - After Issue CN204945277U (en) | 2015-09-15 | 2015-09-15 | Light-duty three-phase voltage current generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526349A (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-weight three-phase voltage and current generator |
-
2015
- 2015-09-15 CN CN201520710713.7U patent/CN204945277U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526349A (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-weight three-phase voltage and current generator |
| CN106526349B (en) * | 2015-09-15 | 2018-03-06 | 国网辽宁省电力有限公司沈阳供电公司 | Light-duty three-phase voltage current generator |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20160106 Effective date of abandoning: 20180306 |