CN218037166U - Generator withstand voltage test system - Google Patents
Generator withstand voltage test system Download PDFInfo
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- CN218037166U CN218037166U CN202222390594.4U CN202222390594U CN218037166U CN 218037166 U CN218037166 U CN 218037166U CN 202222390594 U CN202222390594 U CN 202222390594U CN 218037166 U CN218037166 U CN 218037166U
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Abstract
The utility model discloses a generator withstand voltage test system, include: a control box; the high-voltage cylinder is connected with the power supply output end of the control box and used for carrying out voltage doubling treatment on the power supply output by the control box to obtain high voltage; the microammeter is connected between the output end of the high-voltage cylinder and a stator winding of the generator to be tested and is used for detecting the test current and sending the test current data to the control box, and the control box displays the output voltage and the test current data; and the control unit is in communication connection with the control box and is used for acquiring output voltage and test current data of the control box, drawing and displaying a corresponding volt-ampere characteristic curve. The utility model discloses acquire the current data that microampere meter detected by the control box to make the output voltage and the current data that the control unit acquireed the control box, present with volt-ampere characteristic curve's mode, not only make withstand voltage test's monitoring become simple and convenient, moreover also more directly perceived.
Description
Technical Field
The utility model relates to a power electronic technology field, in particular to generator withstand voltage test system.
Background
The voltage withstand test of a generator, in particular a dc high voltage generator, is a very important test item. In the withstand voltage test, the breakdown voltage of the generator needs to be determined, in order to determine the breakdown voltage, the generator needs to be continuously pressurized, and the voltage and the current are monitored constantly, so that the condition that the insulation failure of the stator winding occurs is found at the first time, and major accidents such as equipment breakdown are avoided.
However, at present, the voltage in the withstand voltage test is displayed on a control box, the current is displayed on a microammeter close to a stator winding of the generator, and the voltage and the current are displayed at different positions, so that inconvenience is brought to the test. In addition, the traditional test method needs to monitor the voltage and current conditions manually, and the test condition of the stator winding of the generator cannot be displayed in an intuitive mode.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a generator withstand voltage test system for it is different with the current display position to solve voltage among the prior art, and the test condition demonstrates not audio-visual problem moreover.
In one aspect, an embodiment of the utility model provides a generator high-voltage insulation test system, include
A control box;
the high-voltage cylinder is connected with the power output end of the control box and used for carrying out voltage doubling treatment on the power output by the control box to obtain high voltage;
the microammeter is connected between the output end of the high-voltage cylinder and a stator winding of the generator to be tested and is used for detecting the test current and sending the test current data to the control box, and the control box displays the output voltage and the test current data;
and the control unit is in communication connection with the control box and is used for acquiring output voltage and test current data of the control box, drawing and displaying a corresponding volt-ampere characteristic curve.
In a possible implementation mode, a digital potentiometer is arranged inside the control box and used for adjusting the output voltage of the control box.
In one possible implementation, the control box is in wireless communication connection with the microammeter.
In one possible implementation, the control box and the control unit are in communication connection through an RS232 interface.
In a possible implementation mode, the power output end of the control box is connected with the high-voltage cylinder through an aviation plug.
The utility model provides a withstand voltage test system of generator has following advantage:
the current data detected by the microammeter is acquired by the control box, and the control unit acquires the output voltage and current data of the control box, and the data are presented in a volt-ampere characteristic curve mode, so that the monitoring of the withstand voltage test is simple and convenient, and the monitoring is more visual.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a generator withstand voltage test system according to an embodiment of the present invention.
Description of the reference numerals: 100-control box, 200-high pressure cylinder, 300-microammeter and 400-control unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic diagram illustrating a structure of a withstand voltage testing system for a generator according to an embodiment of the present invention.
The embodiment of the utility model provides a generator withstand voltage test system, include:
a control box 100;
the high-voltage cylinder 200 is connected with the power output end of the control box 100 and is used for performing voltage doubling processing on the power output by the control box 100 to obtain high voltage;
the microammeter 300 is connected between the output end of the high-voltage cylinder 200 and the stator winding of the generator to be tested, and is used for detecting the test current and sending the test current data to the control box 100, and the control box 100 displays the output voltage and the test current data;
and the control unit 400 is in communication connection with the control box 100 and is used for acquiring the output voltage and the test current data of the control box 100, drawing a corresponding volt-ampere characteristic curve and displaying the curve.
Illustratively, the rated output voltage of the control box 100 is 60 KV/negative polarity, the rated output current is 2mA, the input power supply is 220V and 50Hz, and the control box 100 can continuously work for 1 hour under the rated working condition to meet the requirement of the withstand voltage test of the generator.
The microammeter 300 has the range of 5mA, the precision of +/-0.5 percent and the resolution of 0.1 muA, the microammeter 300 and the control box 100 have wireless communication functions, the microammeter 300 and the control box are in communication connection in a wireless communication mode, and the microammeter 300 acquires high-voltage current input to a stator winding of a generator to be tested and then sends the high-voltage current to the control box 100. The control box 100 also collects the data of the output voltage and displays the data together with the acquired high-voltage current data, so that the data can be conveniently checked by a tester.
In the embodiment of the present invention, the control box 100 has a digital potentiometer therein, and the digital potentiometer is used to adjust the output voltage of the control box 100. Can adopt manual control's mode to control digital potentiometer, for example can set up knob or numeric keyboard on the lateral surface of control box 100 and set up digital potentiometer's output voltage size and the speed of stepping up etc, in the embodiment of the utility model provides an arbitrary numerical value that the speed of stepping up can set up to 0-2.5KV within range, when the speed of stepping up is not zero, can export the voltage that changes gradually, carry out the withstand voltage test in slope promptly to the stator winding of generator.
The utility model provides a control box 100 has overcurrent and overvoltage protection function, and when electric current or voltage were too big, control box 100 will cut off the output to too high voltage or electric current cause serious destruction to being surveyed the generator.
Further, the control unit 400 may employ a portable computer that is communicatively connected with the control box 100 through an RS232 interface. The control box 100 sends the voltage and current data to the control unit 400 through the RS232 interface, and the control unit 400 can generate a corresponding volt-ampere characteristic curve and display the curve, so that the tester can intuitively know the test condition. It is prior art that the computer draws and displays the volt-ampere characteristic curve according to the acquired current and voltage data, and at least refer to the utility model patent of CN102520330B, so the present embodiment does not specifically describe the content thereof.
Meanwhile, the control unit 400 is also provided with breakdown voltage prediction software which predicts the magnitude of the breakdown voltage according to the condition of the drawn volt-ampere characteristic curve and stops the test before the predicted breakdown voltage is reached so as to prevent the generator to be tested from being damaged by breakdown.
In the embodiment of the present invention, the power output end of the control box 100 is connected to the high-voltage barrel 200 through an aviation plug. Specifically, aviation sockets are arranged on the control box 100 and the high-voltage barrel 200, aviation plugs are arranged at two ends of a cable connecting the control box 100 and the high-voltage barrel 200, and the aviation plugs at the two ends of the cable are respectively inserted into the aviation sockets on the control box 100 and the high-voltage barrel 200, so that the control box and the high-voltage barrel can be connected.
In the test process, the tested generator is in a stop state, one phase of stator winding of the tested generator is selected, the stator winding is connected end to end and then connected with the output end of the microammeter 300, so that the selected stator winding is subjected to voltage withstanding test, and the rotor of the generator and other phase of stator windings are grounded after being in short circuit.
The utility model discloses well test system's use flow as follows:
the power is connected to the control box 100, and the control box 100 is connected to the high-voltage cylinder 200 through the aerial plug. The direct current high voltage is connected with the selected stator winding through the top terminal of the microammeter 300, the control box 100, the high voltage barrel 200 and the stator winding are respectively grounded, and the control box 100 is connected with the control unit 400 through an RS232 interface.
After the correct and reliable wiring, the power switch of the control box 100 is turned on, and after the control box 100 is normally connected with the control unit 400, the control unit 400 controls: 1, setting protection voltage and protection current; 2, starting high voltage and adjusting the boosting magnitude and speed at any time, wherein the boosting magnitude and speed depend on the formation of a volt-ampere characteristic curve; predicting the position of the breakover of the volt-ampere characteristic curve, namely the position of the breakover, and stopping boosting before the position of the breakover; 4, providing a test report comprising a current-voltage characteristic curve and a predicted breakdown threshold value; 5) And after the test is finished, the power supply is shut down, and the wire is removed after complete discharge.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A generator withstand voltage test system is characterized by comprising:
a control box (100);
the high-voltage cylinder (200) is connected with the power output end of the control box (100) and is used for carrying out voltage doubling treatment on the power output by the control box (100) to obtain high voltage;
the microammeter (300) is connected between the output end of the high-voltage cylinder (200) and a stator winding of the generator to be tested and is used for detecting test current and sending test current data to the control box (100), and the control box (100) displays output voltage and the test current data;
and the control unit (400) is in communication connection with the control box (100) and is used for acquiring the output voltage of the control box (100) and the test current data, drawing a corresponding volt-ampere characteristic curve and displaying the corresponding volt-ampere characteristic curve.
2. The generator withstand voltage testing system according to claim 1, wherein the control box (100) has a digital potentiometer therein, and the digital potentiometer is used for adjusting the output voltage of the control box (100).
3. The generator withstand voltage testing system according to claim 1, wherein the control box (100) is connected with the microammeter (300) in a wireless communication manner.
4. The generator withstand voltage testing system of claim 1, wherein the control box (100) and the control unit (400) are communicatively connected via an RS232 interface.
5. The generator withstand voltage testing system of claim 1, wherein the power output end of the control box (100) is connected with the high-voltage barrel (200) through an aviation plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222390594.4U CN218037166U (en) | 2022-09-08 | 2022-09-08 | Generator withstand voltage test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222390594.4U CN218037166U (en) | 2022-09-08 | 2022-09-08 | Generator withstand voltage test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218037166U true CN218037166U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222390594.4U Active CN218037166U (en) | 2022-09-08 | 2022-09-08 | Generator withstand voltage test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218037166U (en) |
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2022
- 2022-09-08 CN CN202222390594.4U patent/CN218037166U/en active Active
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