CN215728740U - Converter station converter transformer short circuit test device - Google Patents
Converter station converter transformer short circuit test device Download PDFInfo
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- CN215728740U CN215728740U CN202121099516.8U CN202121099516U CN215728740U CN 215728740 U CN215728740 U CN 215728740U CN 202121099516 U CN202121099516 U CN 202121099516U CN 215728740 U CN215728740 U CN 215728740U
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Abstract
The utility model provides a short-circuit test device for a converter transformer of a converter station, which comprises a first circuit breaker, wherein one end of the first circuit breaker is connected with a 400V experimental voltage, the other end of the first circuit breaker is connected with a voltage regulator, and two sides of the voltage regulator are both connected with first grounding disconnecting links; one end of the voltage regulator, which is separated from the first circuit breaker, is connected with a Y/Y wiring mode converter transformer; one end of the Y/Y wiring mode converter transformer, which is separated from the voltage regulator, is connected with the Y/D wiring mode converter transformer; the device only needs to be tested once, the workload is greatly reduced, the construction period and the labor cost are saved, and the device is superior to other devices in convenience and practicability.
Description
Technical Field
The utility model relates to the field of power systems, in particular to a short-circuit test device for a converter transformer of a converter station.
Background
Now, with the expansion of power systems and transmission scales and the development of high and new technologies, the research of the ultra-high voltage transmission technology is promoted. The +/-800 kV Wuhan converter station is the first 800kV ultrahigh voltage converter station in Hubei province, and ultrahigh voltage direct current transmission is mainly used for large-power transmission projects with long distance, no drop point in the middle and no voltage support. The converter transformer is a key device which is crucial in extra-high voltage direct current transmission engineering. The investment and safe operation of the system are key and important guarantees for obtaining power generation benefits in engineering. Therefore, before a newly installed converter transformer is put into operation, a short-circuit test must be performed to check the transformation ratio, polarity, and correctness of the current secondary circuit of the bushing current transformer.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a short-circuit test device for a converter transformer of a converter station aiming at the defects of the prior art, so that the test process is simplified, and the working efficiency is improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a short-circuit test device for a converter transformer of a converter station, which comprises a first circuit breaker, wherein one end of the first circuit breaker is connected with a 400V experimental voltage, the other end of the first circuit breaker is connected with a voltage regulator, and two sides of the voltage regulator are both connected with first grounding disconnecting links; one end of the voltage regulator, which is separated from the first circuit breaker, is connected with a Y/Y wiring mode converter transformer; and one end of the Y/Y wiring mode converter transformer, which is separated from the voltage regulator, is connected with the Y/D wiring mode converter transformer.
Further, test connecting wires are mounted on two sides of the Y/Y wiring mode converter transformer.
Further, the test connecting lines are installed on two sides of the Y/D wiring mode converter transformer.
Further, the circuit breaker also comprises a first circuit breaker, a second circuit breaker and a third circuit breaker which are connected in series;
two sides of the first circuit breaker are provided with second grounding disconnecting links; third grounding disconnecting links are installed on two sides of the second breaker, and fourth grounding disconnecting links are installed on two sides of the third breaker.
Furthermore, connecting wires are arranged on two sides of the second circuit breaker and two sides of the third circuit breaker; the connecting wire is adjacent to the second circuit breaker or the third circuit breaker.
Furthermore, the two sides of the second grounding disconnecting link at the two sides are connected with a first isolating disconnecting link at the side away from the first circuit breaker; the third grounding disconnecting link and the second circuit breaker on two sides are connected with a second isolation disconnecting link; and the fourth grounding disconnecting link on two sides and one side, away from the third circuit breaker, of the fourth grounding disconnecting link are connected with third isolating disconnecting links.
Further, a fifth grounding disconnecting link is arranged between the adjacent second grounding disconnecting link and the third grounding disconnecting link; and a sixth grounding disconnecting link is arranged between the adjacent third grounding disconnecting link and the fourth grounding disconnecting link.
The utility model has the beneficial effects that: the device only needs to be tested once, the workload is greatly reduced, the construction period and the labor cost are saved, and the device is superior to other devices in convenience and practicability.
Drawings
Fig. 1 is a schematic diagram of a converter transformer short circuit test device of a converter station according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the short-circuit test device for the converter transformer of the converter station comprises a first circuit breaker 1, wherein one end of the first circuit breaker 1 is connected with an experimental voltage of 400V, the other end of the first circuit breaker 1 is connected with a voltage regulator 3, and two sides of the voltage regulator 3 are both connected with a first grounding disconnecting link 4; one end of the voltage regulator 3, which is separated from the first circuit breaker 1, is connected with a Y/Y wiring mode converter transformer 5; and one end of the Y/Y wiring mode converter transformer 5, which is separated from the voltage regulator 3, is connected with a Y/D wiring mode converter transformer 6.
And test connecting wires 7 are arranged on two sides of the Y/Y wiring mode converter transformer 5.
One side of the test connecting wire 7 at the output end is connected with a three-phase short circuit grounding test wire 14.
The test connecting lines 7 are arranged on two sides of the Y/D wiring mode converter transformer 6.
Further comprising a first breaker 1, a second breaker 802 and a third breaker 803 connected in series;
a second grounding disconnecting link 902 is arranged on each of two sides of the first circuit breaker 1; third earthing knife-switch 903 is installed on both sides of second circuit breaker 802, and fourth earthing knife-switch 904 is installed on both sides of third circuit breaker 803.
Connecting wires 11 are arranged on two sides of the second breaker 802 and the third breaker 803; the connecting conductor 11 is adjacent to the second breaker 802 or the third breaker 803.
The two sides of the second grounding disconnecting link 902, which are away from the first circuit breaker 1, are both connected with a first isolation disconnecting link 1201; a second isolation switch 1202 is connected to both sides of the third grounding switch 903 away from the second breaker 802; third isolation switches 1203 are connected to the sides of the fourth grounding switches 904 away from the third breaker 803.
A fifth grounding disconnecting link 905 is arranged between the adjacent second grounding disconnecting link 902 and the third grounding disconnecting link 903; a sixth grounding disconnecting link 906 is arranged between the third grounding disconnecting link 903 and the fourth grounding disconnecting link 904 which are adjacent.
The starting end of one side of the first isolation switch 1201 is connected with a 500kV bus, and the ending end of one side of the third isolation switch 1203 is connected with the 500kV bus.
Converter transformer short circuit test analysis
Converter transformer short-circuit test wiring
As shown in figure 1, a 400V test voltage is applied to the Y-Y type converter transformer valve side, an induced voltage is generated on the network side through the converter transformer, and the induced voltage is applied to the network side of the Y-D type converter transformer, and the Y-D type converter transformer valve side is short-circuited and grounded in advance.
Feasibility analysis
TABLE 1 converter Transformer principal parameters
And (3) converting short circuit impedance:
converting the short-circuit impedance to a network side named value:
the parameters are introduced as follows: 0.19X (510 kV/1.732)2÷382MVA＝43.13Ω
Current and capacity calculation:
grid side current:
grid-side secondary current:
Y-Y variable valve side current:
Y-Y variable valve side secondary current:
Y-D variable valve side current:
Y-D variable valve side secondary current:
required test power supply capacity:
the results are summarized in table 2:
TABLE 2
From the above table, the following conclusions can be drawn:
(1) and the field can provide power supply meeting the power supply capacity required by the test.
(2) Because the high-precision volt-ampere phase meter is arranged on site, and the measuring range is 1.5-100 mA, the measurement requirements of the method can be met. Therefore, the test method has theoretical feasibility by analyzing the calculation result.
Applications of the device
The method is used for simultaneously testing the whole six converter transformers. In the method, the network side wiring can utilize a reverse bow line connected on an alternating current bus, the valve side applies voltage on a Y-Y type converter transformer valve side sleeve leading-out line in a valve hall, and the Y-D type converter transformer valve side sleeve leading-out line is in short circuit. The whole test has little influence on the installed primary equipment, the wiring work is simpler than the first method and the second method, a crane is not needed in the process, and only a lifting car is needed when wiring is conducted in a valve hall. Because only one test is needed for one pole, the workload is greatly reduced, and the construction period and the labor cost are saved.
Through the comparative analysis, the method is superior to other methods in convenience and practicability, so that the short-circuit test of the converter flow of the Wuhan converter station can be satisfactorily completed by selecting the method finally.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The utility model provides a converter station converter transformer short circuit test device which characterized in that: the device comprises a first circuit breaker (1), wherein one end of the first circuit breaker (1) is connected with an experimental voltage of 400V, the other end of the first circuit breaker (1) is connected with a voltage regulator (3), and two sides of the voltage regulator (3) are connected with first grounding disconnecting links (4); one end of the voltage regulator (3), which is separated from the first circuit breaker (1), is connected with a Y/Y wiring mode converter transformer (5); and one end of the Y/Y wiring mode converter transformer (5) which is separated from the voltage regulator (3) is connected with a Y/D wiring mode converter transformer (6).
2. The converter station converter transformer short circuit test device according to claim 1, characterized in that: and test connecting wires (7) are arranged on two sides of the Y/Y wiring mode converter transformer (5).
3. The converter station converter transformer short circuit test device according to claim 2, characterized in that: the test connecting lines (7) are arranged on two sides of the Y/D wiring mode converter transformer (6).
4. The converter station converter transformer short circuit test device according to claim 3, characterized in that: the circuit breaker further comprises a first circuit breaker (1), a second circuit breaker (802) and a third circuit breaker (803) which are connected in series;
two sides of the first breaker (1) are respectively provided with a second grounding disconnecting link (902); third earthing knife-switch (903) are all installed to the both sides of second circuit breaker (802), fourth earthing knife-switch (904) are all installed to the both sides of third circuit breaker (803).
5. The converter station converter transformer short circuit test device according to claim 4, characterized in that: connecting wires (11) are arranged on two sides of the second breaker (802) and the third breaker (803); the connecting conductor (11) is adjacent to the second circuit breaker (802) or the third circuit breaker (803).
6. The converter station converter transformer short circuit test device according to claim 5, characterized in that: one side of the second grounding disconnecting link (902) at two sides, which is separated from the first circuit breaker (1), is connected with a first isolation disconnecting link (1201); one side of the third grounding disconnecting link (903) at two sides, which is separated from the second breaker (802), is connected with a second isolation disconnecting link (1202); and third isolation disconnecting links (1203) are connected to the sides, away from the third circuit breaker (803), of the fourth grounding disconnecting links (904) on the two sides.
7. The converter station converter transformer short circuit test device according to claim 6, characterized in that: a fifth grounding disconnecting link (905) is arranged between the second grounding disconnecting link (902) and the third grounding disconnecting link (903) which are adjacent; a sixth grounding disconnecting link (906) is arranged between the third grounding disconnecting link (903) and the fourth grounding disconnecting link (904).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121099516.8U CN215728740U (en) | 2021-05-21 | 2021-05-21 | Converter station converter transformer short circuit test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121099516.8U CN215728740U (en) | 2021-05-21 | 2021-05-21 | Converter station converter transformer short circuit test device |
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| Publication Number | Publication Date |
|---|---|
| CN215728740U true CN215728740U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121099516.8U Active CN215728740U (en) | 2021-05-21 | 2021-05-21 | Converter station converter transformer short circuit test device |
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| CN (1) | CN215728740U (en) |
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2021
- 2021-05-21 CN CN202121099516.8U patent/CN215728740U/en active Active
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