CN204495926U - A kind of shunt transformer sympathetic inrush emulation test system - Google Patents
A kind of shunt transformer sympathetic inrush emulation test system Download PDFInfo
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- CN204495926U CN204495926U CN201520144450.8U CN201520144450U CN204495926U CN 204495926 U CN204495926 U CN 204495926U CN 201520144450 U CN201520144450 U CN 201520144450U CN 204495926 U CN204495926 U CN 204495926U
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Abstract
The utility model discloses a kind of shunt transformer sympathetic inrush emulation test system, solve the problem of emulation testing when the authentic and valid simulation shunt transformer in laboratory produces sympathetic inrush.Comprise emulation high-voltage side bus (1), emulation medium voltage side bus (2) and emulation low-pressure side bus (3), emulation high-voltage side bus (1) is connected to the infinitely great power-supply system (4) of the first emulation, simulation hair power plant (5) and the second emulation three-winding transformer (31), the high pressure side of the first emulation three-winding transformer (6) is connected in emulation high-voltage side bus (1), the current transformer be connected on the first emulation three-winding transformer (6) is linked together with protection equipment for transformer (29) by current power amplifier (27) and current waveform recorder analyser (28).The utility model can real simulation detect shunt transformer generation sympathetic inrush phenomenon, for the stable operation of on-the-spot protection equipment for transformer provides reference data.
Description
Technical field
The utility model relates to a kind of sympathetic inrush emulation test system, particularly a kind of sympathetic inrush emulation test system of shunt transformer.
Background technology
Transformer is very important electrical equipment in electric system, is widely used in each electric pressure of electrical network.The sympathetic inrush of shunt transformer, refers to when two transformers in parallel, and one, in normal operation, during another idle-loaded switching-on, will produce the phenomenon of sympathetic inrush in the normal transformer run.Sympathetic inrush can cause protection equipment for transformer malfunction; middle sympathetic inrush causes the example of protection equipment for transformer malfunction to cause the widely concern of relay protection field worker at the scene, and sympathetic inrush phenomenon has become the hot issue of tranformer protection area research.In the lab; carry out the research of the waveform character to transformer sympathetic inrush, mechanism of production and Correlative Influence Factors; first the sympathetic inrush emulation test system of transformer will be set up; qualitatively analyze goes out the analog case of the shunt transformer generation sympathetic inrush run; be used to guide the effective operation of on-the-spot relay protection, thus ensure the safe and stable operation of electric system.
Summary of the invention
The utility model provides a kind of shunt transformer sympathetic inrush emulation test system, solves the technical matters of emulation testing when the authentic and valid simulation shunt transformer in laboratory produces sympathetic inrush.
The utility model solves above technical matters by the following technical programs:
A kind of shunt transformer sympathetic inrush emulation test system, comprise emulation high-voltage side bus, emulation medium voltage side bus and emulation low-pressure side bus, emulation high-voltage side bus emulates infinitely great power-supply system by the first isolating switch and first and links together, the high pressure side that emulation high-voltage side bus emulates three-winding transformer by the 3rd isolating switch and first links together, the 5th isolating switch is connected with between the low pressure side and emulation low-pressure side bus of the first emulation three-winding transformer, emulation capacitor is connected to after connecting with the 8th isolating switch and emulates on low-pressure side bus, second artificial load is connected to after connecting with the 9th isolating switch and emulates on low-pressure side bus, the 4th isolating switch is connected with between the medium voltage side and emulation medium voltage side bus of the first emulation three-winding transformer, the infinitely great power-supply system of second emulation links together with emulation medium voltage side bus after connecting with the 6th isolating switch, first artificial load links together with emulation medium voltage side bus after connecting with the 7th isolating switch, the high pressure side of the second emulation three-winding transformer is linked together by the tenth isolating switch and emulation high-voltage side bus, simulation hair power plant is linked together by the second isolating switch and emulation high-voltage side bus, the medium voltage side end of the second emulation three-winding transformer is connected with the first emulation bus, the low pressure side of the second emulation three-winding transformer is connected with the second emulation bus, the output terminal of emulation high voltage side current mutual inductor is linked together by current power amplifier and current waveform recorder analyser and protection equipment for transformer successively, the output terminal of emulation medium voltage side current transformer is linked together by current power amplifier and current waveform recorder analyser and protection equipment for transformer successively, the output terminal of emulation low-pressure side current transformer is linked together by current power amplifier and current waveform recorder analyser and protection equipment for transformer successively.
The output terminal of emulation high side voltage mutual inductor is linked together by voltage power amplifier and voltage waveform recorder analyser; The output terminal of emulation medium voltage side voltage transformer (VT) is linked together by voltage power amplifier and voltage waveform recorder analyser; The output terminal of emulation low-pressure side voltage transformer (VT) is linked together by voltage power amplifier and voltage waveform recorder analyser.
The utility model can real simulation and on-line checkingi shunt transformer generation sympathetic inrush phenomenon time protection equipment for transformer response situation, the stable operation for on-the-spot protection equipment for transformer provides emulation experiment reference data.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail:
A kind of shunt transformer sympathetic inrush emulation test system, comprise emulation high-voltage side bus 1, emulation medium voltage side bus 2 and emulation low-pressure side bus 3, emulation high-voltage side bus 1 emulates infinitely great power-supply system 4 by the first isolating switch 15 and first and links together, emulation high-voltage side bus 1 is linked together by the 3rd isolating switch 17 and the first high pressure side emulating three-winding transformer 6, the 5th isolating switch 19 is connected with between the low pressure side and emulation low-pressure side bus 3 of the first emulation three-winding transformer 6, emulation capacitor 24 is connected to after connecting with the 8th isolating switch 22 and emulates on low-pressure side bus 3, second artificial load 25 is connected to after connecting with the 9th isolating switch 23 and emulates on low-pressure side bus 3, the 4th isolating switch 18 is connected with between the medium voltage side and emulation medium voltage side bus 2 of the first emulation three-winding transformer 6, the infinitely great power-supply system 7 of second emulation links together with emulation medium voltage side bus 2 after connecting with the 6th isolating switch 20, first artificial load 8 links together with emulation medium voltage side bus 2 after connecting with the 7th isolating switch 21, the high pressure side of the second emulation three-winding transformer 31 is linked together by the tenth isolating switch 30 and emulation high-voltage side bus 1, simulation hair power plant 5 is linked together by the second isolating switch 16 and emulation high-voltage side bus 1, the medium voltage side end of the second emulation three-winding transformer 31 is connected with the first emulation bus 32, the low pressure side of the second emulation three-winding transformer 31 is connected with the second emulation bus 33, the output terminal of emulation high voltage side current mutual inductor 12 is linked together with protection equipment for transformer 29 by current power amplifier 27 and current waveform recorder analyser 28 successively, the output terminal of emulation medium voltage side current transformer 13 is linked together with protection equipment for transformer 29 by current power amplifier 27 and current waveform recorder analyser 28 successively, the output terminal of emulation low-pressure side current transformer 14 is linked together with protection equipment for transformer 29 by current power amplifier 27 and current waveform recorder analyser 28 successively.
The output terminal of emulation high side voltage mutual inductor 9 is linked together by voltage power amplifier 26 and voltage waveform recorder analyser 34; The output terminal of emulation medium voltage side voltage transformer (VT) 10 is linked together by voltage power amplifier 26 and voltage waveform recorder analyser 34; The output terminal of emulation low-pressure side voltage transformer (VT) 11 is linked together by voltage power amplifier 26 and voltage waveform recorder analyser 34.
The utility model is when emulation testing, first emulation three-winding transformer 6 is in running status, when on high-tension side tenth isolating switch 30 of the second emulation three-winding transformer 31 closes a floodgate, the change of the amplitude size of the sympathetic inrush produced in the first emulation three-winding transformer 6, can emulate the initial remanent magnetism of three-winding transformer 31 and the power phase angle of the infinitely great power-supply system 4 of the first emulation and system resistance respectively by adjustment second and realize.Test case is as follows:
When power phase angle and system resistance one timing of the infinitely great power-supply system 4 of the first emulation, tenth isolating switch 30 closes a floodgate, the initial remanent magnetism of the second emulation three-winding transformer 31 is larger, its excitation surge current is larger, first emulation three-winding transformer 6 sympathetic inrush also will larger, and sympathetic inrush appearance and to reach the speed of maximal value faster;
The system resistance emulating infinitely great power-supply system 4 when the second initial remanent magnetism and first emulating three-winding transformer 31 is certain, if when power phase angle is 0 °, tenth isolating switch 30 closes a floodgate, there is larger excitation surge current in the A phase of the second emulation three-winding transformer 31, the first three-winding transformer 6 also can produce the sympathetic inrush of larger peak value simultaneously; If when power phase angle is 90 °, tenth isolating switch 30 closes a floodgate, then there is the excitation surge current that peak value is less in the A phase of the second emulation three-winding transformer 31, thus the sympathetic inrush that the A phase emulating three-winding transformer 6 first occurs is also less, but has occurred the excitation surge current that peak value is larger and sympathetic inrush in other two-phases;
When the initial remanent magnetism of the second emulation three-winding transformer 31 is certain, when the power phase angle of the infinitely great power-supply system 4 of the first emulation is 0 °, tenth isolating switch 30 closes a floodgate, the system resistance of the infinitely great power-supply system 4 of the first emulation is larger, first emulation three-winding transformer 6 sympathetic inrush amplitude is larger, and increases faster.
Claims (2)
1. a shunt transformer sympathetic inrush emulation test system, comprise emulation high-voltage side bus (1), emulation medium voltage side bus (2) and emulation low-pressure side bus (3), it is characterized in that, emulation high-voltage side bus (1) emulates infinitely great power-supply system (4) by the first isolating switch (15) and first and links together, emulation high-voltage side bus (1) is linked together by the 3rd isolating switch (17) and the first high pressure side emulating three-winding transformer (6), the 5th isolating switch (19) is connected with between the low pressure side and emulation low-pressure side bus (3) of the first emulation three-winding transformer (6), emulation capacitor (24) is connected to after connecting with the 8th isolating switch (22) and emulates on low-pressure side bus (3), second artificial load (25) is connected to after connecting with the 9th isolating switch (23) and emulates on low-pressure side bus (3), the 4th isolating switch (18) is connected with between the medium voltage side and emulation medium voltage side bus (2) of the first emulation three-winding transformer (6), the second infinitely great power-supply system of emulation (7) links together with emulation medium voltage side bus (2) after connecting with the 6th isolating switch (20), first artificial load (8) links together with emulation medium voltage side bus (2) after connecting with the 7th isolating switch (21), the high pressure side of the second emulation three-winding transformer (31) is linked together by the tenth isolating switch (30) and emulation high-voltage side bus (1), simulation hair power plant (5) is linked together by the second isolating switch (16) and emulation high-voltage side bus (1), the medium voltage side end of the second emulation three-winding transformer (31) is connected with the first emulation bus (32), the low pressure side of the second emulation three-winding transformer (31) is connected with the second emulation bus (33), the output terminal of emulation high voltage side current mutual inductor (12) is linked together with protection equipment for transformer (29) by current power amplifier (27) and current waveform recorder analyser (28) successively, the output terminal of emulation medium voltage side current transformer (13) is linked together with protection equipment for transformer (29) by current power amplifier (27) and current waveform recorder analyser (28) successively, the output terminal of emulation low-pressure side current transformer (14) is linked together with protection equipment for transformer (29) by current power amplifier (27) and current waveform recorder analyser (28) successively.
2. a kind of shunt transformer sympathetic inrush emulation test system according to claim 1, it is characterized in that, the output terminal of emulation high side voltage mutual inductor (9) is linked together by voltage power amplifier (26) and voltage waveform recorder analyser (34); The output terminal of emulation medium voltage side voltage transformer (VT) (10) is linked together by voltage power amplifier (26) and voltage waveform recorder analyser (34); The output terminal of emulation low-pressure side voltage transformer (VT) (11) is linked together by voltage power amplifier (26) and voltage waveform recorder analyser (34).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520144450.8U CN204495926U (en) | 2015-03-14 | 2015-03-14 | A kind of shunt transformer sympathetic inrush emulation test system |
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| CN201520144450.8U CN204495926U (en) | 2015-03-14 | 2015-03-14 | A kind of shunt transformer sympathetic inrush emulation test system |
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| CN204495926U true CN204495926U (en) | 2015-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353258A (en) * | 2015-12-03 | 2016-02-24 | 新疆特变电工自控设备有限公司 | Test method for testing transformer differential protection anti-transformer inrush current |
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2015
- 2015-03-14 CN CN201520144450.8U patent/CN204495926U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353258A (en) * | 2015-12-03 | 2016-02-24 | 新疆特变电工自控设备有限公司 | Test method for testing transformer differential protection anti-transformer inrush current |
| CN105353258B (en) * | 2015-12-03 | 2018-08-31 | 新疆特变电工自控设备有限公司 | A kind of test method of test transformer differential protection reactance transformer excitation surge current |
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