CN204495925U - A kind of cascade transformer sympathetic inrush emulation test system - Google Patents
A kind of cascade transformer sympathetic inrush emulation test system Download PDFInfo
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- CN204495925U CN204495925U CN201520144449.5U CN201520144449U CN204495925U CN 204495925 U CN204495925 U CN 204495925U CN 201520144449 U CN201520144449 U CN 201520144449U CN 204495925 U CN204495925 U CN 204495925U
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Abstract
The utility model discloses a kind of cascade transformer sympathetic inrush emulation test system, solve the problem of emulation testing when the authentic and valid simulation cascade 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 of emulation (4) and simulation hair power plant (5), 3rd artificial load (30) is connected with emulation medium voltage side bus (2) by two-winding transformer (7), the high pressure side of emulation three-winding transformer (6) is connected in emulation high-voltage side bus (1), the current transformer be connected in 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 provides referential reference data for the stable operation of on-the-spot cascade protection equipment for transformer.
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 cascade 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 cascade transformer, refers to the transformer when two cascades, 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 of 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 cascade 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 cascade transformer sympathetic inrush emulation test system, solves the technical matters of emulation testing when the authentic and valid simulation cascade transformer in laboratory produces sympathetic inrush.
The utility model solves above technical matters by the following technical programs:
A kind of cascade 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 is linked together by the first isolating switch and the infinitely great power-supply system of emulation, emulation high-voltage side bus is linked together by the high pressure side of the 3rd isolating switch with emulation three-winding transformer, the 5th isolating switch is connected with between the low pressure side and emulation low-pressure side bus of 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 emulation three-winding transformer, 3rd artificial load is linked together with emulation medium voltage side bus by two-winding transformer and the 6th isolating switch successively, first artificial load links together with emulation medium voltage side bus after connecting with the 7th isolating switch, simulation hair power plant is linked together by the second isolating switch and emulation high-voltage side 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 cascade 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 cascade 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 is linked together by the first isolating switch 15 and the infinitely great power-supply system 4 of emulation, emulation high-voltage side bus 1 is linked together by the high pressure side of the 3rd isolating switch 17 with emulation 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 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 emulation three-winding transformer 6, 3rd artificial load 30 is linked together with emulation medium voltage side bus 2 by two-winding transformer 7 and the 6th isolating switch 20 successively, first artificial load 8 links together with emulation medium voltage side bus 2 after connecting with the 7th isolating switch 21, simulation hair power plant 5 is linked together by the second isolating switch 16 and emulation high-voltage side bus 1, 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 31; 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 31; 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 31.
The utility model is when emulation testing, emulation three-winding transformer 6 is in running status, when on high-tension side 6th isolating switch 20 of emulation two-winding transformer 7 closes a floodgate, the generation of emulation three-winding transformer 6 sympathetic inrush and the change of amplitude size can realize respectively by regulating the initial remanent magnetism of emulation two-winding transformer 7, the power phase angle emulating infinitely great power-supply system 4 and system resistance.Test case is as follows:
When power phase angle and system resistance one timing of the infinitely great power-supply system 4 of emulation, 6th isolating switch 20 closes a floodgate, the initial remanent magnetism of emulation two-winding transformer 7 is larger, its excitation surge current is larger, the sympathetic inrush of emulation three-winding transformer 6 also will larger, and sympathetic inrush appearance and to reach the speed of maximal value faster.
When the initial remanent magnetism of emulation two-winding transformer 7 is certain with the system resistance of the infinitely great power-supply system 4 of emulation, if when power phase angle is 0 °, 6th isolating switch 20 closes a floodgate, there is larger excitation surge current in the A phase of emulation two-winding transformer 7, three-winding transformer 6 also can produce the sympathetic inrush of larger peak value simultaneously; If when power phase angle is 90 °, 6th breaker closing, there is the excitation surge current that peak value is less in the A phase then emulating two-winding transformer 7, thus also less at the sympathetic inrush that occurs of A phase of emulation three-winding transformer 6, but there is the excitation surge current that peak value is larger and sympathetic inrush in other two-phases.
When the initial remanent magnetism of emulation two-winding transformer 7 is certain, when the power phase angle emulating infinitely great power-supply system 4 is 0 °, the 6th isolating switch 20 closes a floodgate, and the system resistance emulating infinitely great power-supply system 4 is larger, the sympathetic inrush amplitude of emulation three-winding transformer 6 is larger, and increases faster.
Claims (2)
1. a cascade 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) is linked together by the first isolating switch (15) and the infinitely great power-supply system of emulation (4), emulation high-voltage side bus (1) is linked together by the high pressure side of the 3rd isolating switch (17) with emulation 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 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 emulation three-winding transformer (6), 3rd artificial load (30) is linked together with emulation medium voltage side bus (2) by two-winding transformer (7) and the 6th isolating switch (20) successively, first artificial load (8) links together with emulation medium voltage side bus (2) after connecting with the 7th isolating switch (21), simulation hair power plant (5) is linked together by the second isolating switch (16) and emulation high-voltage side bus (1), 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 cascade 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 (31); 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 (31); 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 (31).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144449.5U CN204495925U (en) | 2015-03-14 | 2015-03-14 | A kind of cascade transformer sympathetic inrush emulation test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520144449.5U CN204495925U (en) | 2015-03-14 | 2015-03-14 | A kind of cascade transformer sympathetic inrush emulation test system |
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| CN204495925U true CN204495925U (en) | 2015-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092261A (en) * | 2017-11-30 | 2018-05-29 | 国网北京市电力公司 | Combined floodgate mode selection method, device and the storage medium of cascade transformer |
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2015
- 2015-03-14 CN CN201520144449.5U patent/CN204495925U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092261A (en) * | 2017-11-30 | 2018-05-29 | 国网北京市电力公司 | Combined floodgate mode selection method, device and the storage medium of cascade transformer |
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