CN216285596U - Converter station converter valve low pressure device - Google Patents
Converter station converter valve low pressure device Download PDFInfo
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- CN216285596U CN216285596U CN202120623722.8U CN202120623722U CN216285596U CN 216285596 U CN216285596 U CN 216285596U CN 202120623722 U CN202120623722 U CN 202120623722U CN 216285596 U CN216285596 U CN 216285596U
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- 230000006698 induction Effects 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
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Abstract
The utility model discloses a converter station converter valve low-voltage pressurizing device which comprises an induction voltage regulator, an autotransformer, a step-up transformer, a disconnecting link, a converter transformer, a converter valve, a load resistor, an isolation transformer, an oscilloscope and a differential probe. The utility model has the beneficial effects that: the converter valves are connected in series, and each converter valve can realize short circuit through a temporary short-circuit wire so as to meet the operation requirements of pressurization tests on different converter valves; the voltage of each point of the converter valve is detected through a differential probe of the oscilloscope, so that the correctness of the trigger synchronous voltage of the converter valve and the correctness of the trigger control voltage of the converter valve 6 are determined, the voltage waveform diagram of the valve side can be displayed through the oscilloscope, and the oscilloscope is provided with the isolation transformers connected in series during working so as to reduce the number of the oscilloscope and further ensure the accuracy of a detection result.
Description
Technical Field
The utility model relates to low-pressure pressurization test equipment for a converter valve, in particular to a low-pressure pressurization device for the converter valve of a converter station, and belongs to the technical field of application of the converter valve.
Background
The converter valve is a core device of a direct current transmission project, expected direct current voltage is obtained and power control is achieved by sequentially connecting three-phase alternating current voltage to a direct current end, and a low-voltage pressurization test of a converter transformer with a valve group must be completed before the converter valve is charged at high voltage.
And to current device for carrying out converter valve low pressure pressurization test, it often can only be tested to a single converter valve, consequently can lead to in the test process, detection efficiency is comparatively low, extravagant more manpower and materials, in addition, to experimental testing process, can not detect the voltage variation of transverter in real time, and then can't accomplish the exactness to converter valve trigger synchronous voltage, and the accurate detection of the exactness of converter valve trigger control voltage, based on this, this application provides a converter station converter valve low pressure pressurization device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provide a converter station converter valve low-pressure pressurizing device.
The utility model realizes the purpose through the following technical scheme: a converter station converter valve low-pressure pressurizing device comprises a converter transformer line side and a converter transformer valve side; the converter transformer comprises a converter transformer circuit, a plurality of groups of converter valves 6, an alternating current power supply, an induction voltage regulator 1 and a step-up transformer 3, wherein the converter transformer circuit side is connected with the alternating current power supply, the induction voltage regulator 1 and the step-up transformer 3, the converter transformer 5 and the converter valves 6 are connected with the valve sides, the circuit on the valve sides is provided with a knife switch 4, and the converter valves 6 are connected with load resistors 7 in parallel;
the output end of the alternating current power supply is connected with the input end of the induction voltage regulator 1, the output end of the induction voltage regulator 1 is connected with the input end of the boosting transformer 3, the output end of the boosting transformer 3 is connected with the input end of the converter transformer 5, and the output end of the converter transformer 5 is connected with the input end of the converter valve 6.
As a still further scheme of the utility model: the output end of the induction voltage regulator is also connected with an autotransformer.
As a still further scheme of the utility model: and a differential probe of an oscilloscope is clamped on a connecting line of the load resistor and is used for detecting the voltage of each point of the converter valve.
As a still further scheme of the utility model: and an isolation transformer is connected in series on a connecting line of the load resistor.
As a still further scheme of the utility model: the capacity of the load resistor is calculated by adopting the following formula:
Rd＝Ud/Id(test)
Presistor＝Rd·Id 2
wherein, IdIs 3-6A; u shapethyristor200-400V; u shapetestIs a line voltage applied to the primary side of the converter transformer; u shapeVNThe rated voltage of the converter transformer valve side is obtained; u shapeaCNIs the rated voltage of the line side of the converter transformer.
As a still further scheme of the utility model: the converter valves are connected in series, and each converter valve can be short-circuited through a temporary short-circuit wire.
The utility model has the beneficial effects that: the converter station converter valve low-pressure pressurizing device is reasonable in design, the converter valves are connected in series, and each converter valve can realize short circuit through a temporary short-circuit wire, so that the pressurizing test operation requirements of different converter valves are met; the voltage of each point of the converter valve is detected through a differential probe of the oscilloscope, so that the correctness of the trigger synchronous voltage of the converter valve and the correctness of the trigger control voltage of the converter valve 6 are determined, the voltage waveform diagram of the valve side can be displayed through the oscilloscope, and the oscilloscope is provided with the isolation transformers connected in series during working so as to reduce the number of the oscilloscope and further ensure the accuracy of a detection result.
Drawings
FIG. 1 is a schematic circuit diagram of the structure of the present invention.
In the figure: 1. the device comprises an induction voltage regulator, 2, an autotransformer, 3, a step-up transformer, 4, a disconnecting link, 5, a converter transformer, 6, a converter valve, 7, a load resistor, 8, an isolation transformer, 9, an oscilloscope, 10 and a differential probe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a converter station converter valve low-pressure pressurization device includes a converter transformer line side and a valve side; the converter transformer comprises a converter transformer circuit, a plurality of groups of converter valves 6, an alternating current power supply, an induction voltage regulator 1 and a step-up transformer 3, wherein the converter transformer circuit side is connected with the alternating current power supply, the induction voltage regulator 1 and the step-up transformer 3, the converter transformer 5 and the converter valves 6 are connected with the valve sides, the circuit on the valve sides is provided with a knife switch 4, and the converter valves 6 are connected with load resistors 7 in parallel;
the output end of the alternating current power supply is connected with the input end of the induction voltage regulator 1, the output end of the induction voltage regulator 1 is connected with the input end of the boosting transformer 3, the output end of the boosting transformer 3 is connected with the input end of the converter transformer 5, and the output end of the converter transformer 5 is connected with the input end of the converter valve 6.
Further, in the embodiment of the present invention, the output end of the induction voltage regulator 1 is further connected to an autotransformer 2, which is used for meeting the requirement of regulating the CFC supply voltage.
Further, in the embodiment of the present invention, a differential probe 10 of an oscilloscope 9 is clamped on the connection line of the load resistor 7, and is used for detecting voltages of various points of the converter valve 6, so as to determine the correctness of the trigger synchronization voltage of the converter valve 6 and the correctness of the trigger control voltage of the converter valve 6, and can display a voltage waveform diagram of the valve side through the oscilloscope 9.
Further, in the embodiment of the present invention, an isolation transformer 8 is connected in series to a connection line of the load resistor 7, so as to reduce the number of the oscillograph 9, and further ensure the accuracy of the detection result.
Further, in the embodiment of the present invention, the capacity of the load resistor 7 is calculated by using the following formula:
Rd＝Ud/Id(test)
Presistor＝Rd·Id 2
wherein, IdIs 3-6A; u shapethyristor200-400V; u shapetestIs a line voltage applied to the primary side of the converter transformer; u shapeVNThe rated voltage of the converter transformer valve side is obtained; u shapeaCNIs the rated voltage of the line side of the converter transformer.
Further, in the embodiment of the present invention, a plurality of the converter valves 6 are connected in series, and each converter valve 6 may be short-circuited by a temporary short-circuit line, so as to meet the operation requirement of the pressurization test on different converter valves 6.
Example two
Referring to fig. 1, a converter station converter valve low-pressure pressurization device includes a converter transformer line side and a valve side; the converter transformer comprises a converter transformer circuit, a plurality of groups of converter valves 6, an alternating current power supply, an induction voltage regulator 1 and a step-up transformer 3, wherein the converter transformer circuit side is connected with the alternating current power supply, the induction voltage regulator 1 and the step-up transformer 3, the converter transformer 5 and the converter valves 6 are connected with the valve sides, the circuit on the valve sides is provided with a knife switch 4, and the converter valves 6 are connected with load resistors 7 in parallel;
the output end of the alternating current power supply is connected with the input end of the induction voltage regulator 1, the output end of the induction voltage regulator 1 is connected with the input end of the boosting transformer 3, the output end of the boosting transformer 3 is connected with the input end of the converter transformer 5, and the output end of the converter transformer 5 is connected with the input end of the converter valve 6.
Further, in the embodiment of the present invention, the capacity of the load resistor 7 is calculated by using the following formula:
Utest＝2000V；Id(test)＝3A
UaCN＝530/kV；UvalveΔ＝170.3kV；UvalveY＝170.3/kV
UdΔ＝643×1.3＝836V
Rd＝(836+836)/2A＝836Ω
Presistor＝836×32＝7524W
and for the resistive load alpha being 60-120 degrees, the current is gradually reduced.
The working principle is as follows: when the converter station converter valve low-voltage pressurizing device is used, firstly, whether line connection is correct or not is checked, and a switch of a converter transformer 5 and a knife switch 4 on a valve side are opened; switching on an alternating current power supply and adjusting the induction voltage regulator 1 to a proper voltage level to pressurize the converter transformer 5; connecting a plurality of converter valves 6 in series, connecting the converter valves into a converter transformer 5, and short-circuiting the converter valves 6 which are not tested by a temporary short-circuit wire; and (3) checking the voltage fluctuation of the tested converter valve 6 by using an oscilloscope, after one converter valve 6 is checked and tested, when the next converter valve 6 is tested, short-circuiting the converter valve 6 which is not tested and detected by using a temporary short-circuit wire, and repeating the steps to finish the low-voltage pressurization test of all the converter valves 6.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A converter station converter valve low-pressure pressurizing device comprises a converter transformer line side and a converter transformer valve side; the method is characterized in that: the converter transformer is characterized in that an alternating current power supply, an induction voltage regulator (1) and a step-up transformer (3) are connected to the side of the converter transformer line, a converter transformer (5) and a converter valve (6) are connected to the side of the valve, a disconnecting link (4) is arranged on the line of the valve side, a plurality of groups of converter valves (6) are arranged, and load resistors (7) are connected in parallel to the converter valves (6);
the output end of the alternating current power supply is connected with the input end of the induction voltage regulator (1), the output end of the induction voltage regulator (1) is connected with the input end of the boosting transformer (3), the output end of the boosting transformer (3) is connected with the input end of the converter transformer (5), and the output end of the converter transformer (5) is connected with the input end of the converter valve (6).
2. The low pressure pressurization device for the converter valves of the converter station according to claim 1, characterized in that: the output end of the induction voltage regulator (1) is also connected with an autotransformer (2).
3. The low pressure pressurization device for the converter valves of the converter station according to claim 1, characterized in that: and a differential probe (10) of an oscilloscope (9) is clamped on a connecting line of the load resistor (7) and is used for detecting the voltage of each point of the converter valve (6).
4. The low pressure pressurization device for the converter valves of the converter station according to claim 1, characterized in that: and an isolation transformer (8) is connected in series on a connecting line of the load resistor (7).
5. The low pressure pressurization device for the converter valves of the converter station according to claim 1, characterized in that: the capacity of the load resistor (7) is calculated by adopting the following formula:
Rd＝Ud/Id(test)
Presistor＝Rd·Id 2
wherein, IdIs 3-6A; u shapethyristor200-400V; u shapetestIs a line voltage applied to the primary side of the converter transformer; u shapeVNThe rated voltage of the converter transformer valve side is obtained; u shapeaCNIs the rated voltage of the line side of the converter transformer.
6. The low pressure pressurization device for the converter valves of the converter station according to claim 1, characterized in that: the converter valves (6) are connected in series, and each converter valve (6) can be short-circuited through a temporary short-circuit wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120623722.8U CN216285596U (en) | 2021-03-29 | 2021-03-29 | Converter station converter valve low pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120623722.8U CN216285596U (en) | 2021-03-29 | 2021-03-29 | Converter station converter valve low pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216285596U true CN216285596U (en) | 2022-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120623722.8U Active CN216285596U (en) | 2021-03-29 | 2021-03-29 | Converter station converter valve low pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216285596U (en) |
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2021
- 2021-03-29 CN CN202120623722.8U patent/CN216285596U/en active Active
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