CN217063300U - Integrated low-voltage complete reactive compensation testing device - Google Patents
Integrated low-voltage complete reactive compensation testing device Download PDFInfo
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- CN217063300U CN217063300U CN202220325933.8U CN202220325933U CN217063300U CN 217063300 U CN217063300 U CN 217063300U CN 202220325933 U CN202220325933 U CN 202220325933U CN 217063300 U CN217063300 U CN 217063300U
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Abstract
The utility model discloses an integrated low-voltage complete reactive compensation testing device, which comprises a test bed, wherein an electric voltage regulator, a transformer, a rectifier, a multi-contact line change-over switch, a resistance load, a timer, a voltage detection loop and a current coil are arranged on the test bed; the electric voltage regulator, the rectifier, the transformer, the timer and the resistance load are all connected to the line transfer switch, and the electric voltage regulator is also connected with the rectifier through the transformer; the resistance load is also connected with a multi-path switching terminal; the circuit change-over switch is used for adjusting a working circuit of the rectifier, the resistive load and the timer and is also used for adjusting the power factor of the transformer; the testing device with the structure can complete four test items of the reactive compensation device through one set of device, and when the test items are changed, a test line does not need to be built again, so that the workload of building the testing device of the reactive compensation device is effectively reduced, and the testing efficiency is improved.
Description
Technical Field
The utility model relates to a reactive compensation equipment test technical field especially relates to an integrated form low pressure complete set reactive compensation testing arrangement.
Background
According to technical parameters of low-voltage complete reactive compensation devices of different specifications and test requirements specified by standards, a dynamic response time test, a power frequency overvoltage protection test, an inrush current protection test and a discharge test need to be carried out on the low-voltage complete reactive compensation devices.
The detection of the dynamic response time specifically includes: firstly, the compensating device is placed in an automatic working state, rated voltage is applied to the compensating device, inductive load larger than a set value is put into a main circuit, the change of the voltage of the inductive load is detected, the time is recorded as T1, the change of the current put into the capacitor is detected at the same time, the time T2 when the output current of the compensating capacitor changes is recorded, then T2-T1 is the dynamic response time T of the device, and the maximum time T value is obtained after 3 times of tests.
The detection of the power frequency overvoltage protection specifically comprises the following steps: and connecting a power supply to the compensation device, closing the capacitor switching switch, adjusting the power supply voltage to a set value, and disconnecting the capacitor branch circuit by the overvoltage protection device. The device for automatic control switching is provided with power frequency overvoltage protection, and the protection action voltage is adjustable at least between 1.1 times and 1.2 times of the rated voltage of the device. When the overvoltage of the compensation device reaches a set value, the capacitor bank is completely cut off within 1min, and the test is passed.
The detection of the inrush current protection includes: and (3) firstly, all the other capacitors are connected with rated voltage, and then the last group of capacitors are put into the system after the capacitors work stably, and the inrush current value of the last group of capacitors is detected.
The detection of the discharge performance is specifically: the discharge test is carried out on capacitors with different capacities, the capacitors are charged to a rated voltage peak value by a direct current method, then a discharge device is switched on, a discharge facility of the device ensures that the time from the rated voltage peak value to 50V is not more than 3min after the capacitors are powered off, and the test is met after 5 times of continuous measurement.
In summary, according to the current laboratory conditions, most of manufacturers can only complete one test at a time, and to complete the four detection tests, the test equipment needs to be set up four times in sequence, the test equipment and the test circuit need to be replaced, so that the workload is high, and the test efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a complete set of reactive compensation testing arrangement of integrated form low pressure that can accomplish a plurality of experimental projects through one set of device for solving above-mentioned technical problem to improve reactive compensation device's efficiency of software testing.
In order to achieve the purpose, the utility model discloses an integrated low-voltage complete reactive compensation testing device, which comprises a test bed, wherein an electric voltage regulator, a transformer, a rectifier, a multi-contact line change-over switch, a resistance load, a timer, a voltage detection loop and a current coil are arranged on the test bed;
the electric voltage regulator, the rectifier, the transformer, the timer and the resistance load are all connected to the line transfer switch, and the electric voltage regulator is also connected with the rectifier through the transformer;
the resistance load is also connected with a multi-path switching terminal, the multi-path switching terminal is also connected with the current coil and the voltage detection loop, and the multi-path switching terminal is provided with a switching port connected with a reactive power compensation device to be detected; the voltage detection loop is used for detecting the voltage of the reactive power compensation device, and the timer is also connected with the voltage detection loop so as to start or end timing according to the feedback of the voltage detection loop;
the line transfer switch is used for adjusting the rectifier, the resistive load and a working loop of the timer, and is also used for adjusting the power factor of the transformer.
Preferably, the transformer includes a first transformer and a second transformer selectively connected to the electric voltage regulator under the control of the line switcher, and the second transformer is connected to the line switcher through the rectifier, and the line switcher adjusts the power factor output by the first transformer.
Preferably, the winding of the first transformer includes two connection structures with different power factors, and the line switcher changes the power factor of the output of the first transformer by adjusting the winding connection structure of the first transformer.
Preferably, the windings of the first transformer include a star connection structure and a delta connection structure.
Preferably, the line transfer switch changes the power factor of the output of the first transformer by changing the access resistance value of the resistive load.
Preferably, the test bed is further provided with an ammeter and a voltmeter, the ammeter is connected with the current coil, the voltmeter is respectively connected with the electric voltage regulator, the timer and the line change-over switch, and the line change-over switch is used for changing an access loop of the voltmeter.
Compared with the prior art, the integrated low-voltage complete reactive compensation testing device of the utility model connects the electric voltage regulator, the transformer, the rectifier, the resistance load, the timer, the voltage detection loop and the current coil together through the multi-contact line change-over switch, and adjusts the resistance load, the rectifier, the working loop of the timer and the power factor of the transformer through the line change-over switch, thereby enabling the testing device to correspond to different testing project requirements, when the testing project is required to be changed, the conversion of the testing line can be completed only by operating the line change-over switch, thereby, four testing projects of dynamic effect time detection, power frequency overvoltage protection detection, inrush current protection detection, discharge detection and the like of the reactive compensation device can be completed through one set of device, when the testing project is changed, the testing line does not need to be built again, thereby effectively reducing the workload built by the testing device of the reactive compensation device, the testing efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of a schematic structure of a testing device according to one embodiment of the present invention.
Fig. 2 is a schematic view of the testing device according to another embodiment of the present invention.
Detailed Description
In order to explain the technical contents, structural features, objects and effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
The embodiment discloses an integrated low-voltage complete reactive compensation testing device for detecting the working performance of the low-voltage complete reactive compensation device, as shown in fig. 1, the testing device comprises a test bench (not shown), wherein an electric voltage regulator 10, a transformer 11, a rectifier 12, a multi-contact line change-over switch 20, a resistive load 13, a timer 14, a voltage detection loop 15 and a current coil 16 are arranged on the test bench.
The electric voltage regulator 10, the rectifier 12, the transformer 11, the timer 14 and the resistive load 13 are all connected to the line transfer switch 20, and the electric voltage regulator 10 is further connected to the rectifier 12 through the transformer 11.
The resistive load 13 is further connected with a multiplexing terminal 17, the multiplexing terminal 17 is further connected with the current coil 16 and the voltage detection circuit 15, and the multiplexing terminal 17 is provided with a switching port connected with the reactive power compensation device 30 to be tested. The voltage detection circuit 15 is used for detecting the voltage of the reactive power compensation device 30, and the timer 14 is further connected to the voltage detection circuit 15 to start or end the timing according to the feedback of the voltage detection circuit 15.
And a line transfer switch 20 for adjusting the working circuit of the rectifier 12, the resistive load 13 and the timer 14, and also for adjusting the power factor of the transformer 11.
When the dynamic response time detection is performed by using the testing device, firstly, the line change-over switch 20 is operated, the access state of the rectifier 12 is adjusted, namely, the rectifier 12 exits from a working loop between the resistive load 13 and the transformer 11, and further, the power factor output by the transformer 11 is adjusted through the line change-over switch 20, so that the power factor at the moment is 1, and because the power factor is 1, the capacitor of the reactive power compensation device 30 is in a non-input state, and meanwhile, the output voltage of the transformer 11 is adjusted through the electric voltage regulator 10, so that the voltage output by the transformer 11 is the rated value of the reactive power compensation device 30; then, the line switcher 20 is operated to adjust the power factor output by the transformer 11, for example, the power factor is changed from 1 to 0.8, the timer 14 is switched into the loop, so that the timer 14 starts to time, the voltage of the reactive power compensation device 30 is detected through the voltage detection loop 15, when the voltage value detected by the voltage detection loop 15 reflects the input of the capacitor of the reactive power compensation device 30, the timer 14 stops working, and the time recorded by the timer 14 at this time is the dynamic response time of the reactive power compensation device 30.
When the testing device is used for power frequency overvoltage protection detection, firstly, the line change-over switch 20 is operated to adjust the access state of the rectifier 12, i.e. the rectifier 12 exits from a working loop between the resistive load 13 and the transformer 11, and further the power factor output by the transformer 11 is adjusted through the line change-over switch 20, so that the power factor at the moment is not the maximum value 1, for example, 0.8, and further the capacitor of the reactive compensation device 30 is in the access state, then the electric voltage regulator 10 is adjusted, so that the output voltage of the transformer 11 is a plurality of times, for example, 1.15 times, of the working voltage of the reactive compensation device 30, and simultaneously the timer 14 is accessed into the loop through the line change-over switch 20, so that the timer 14 starts to time, when the voltage detection loop 15 detects that the capacitor of the reactive compensation device 30 is completely cut off, the timer 14 stops timing, at this time, the display time of the timer 14 is the power frequency overvoltage protection time of the reactive power compensation device 30.
When the test device is used for surge protection detection, firstly, the line change-over switch 20 is operated, the access state of the rectifier 12 is adjusted, namely the rectifier 12 exits from a working loop between the resistive load 13 and the transformer 11, and further, the power factor output by the transformer 11 is adjusted through the line change-over switch 20, so that the power factor at the moment is 1, because the power factor is 1, the capacitance of the reactive compensation device 30 is in a non-input state, all the rest capacitances except the last group of capacitances of the reactive compensation device 30 are loaded with rated voltage, the current value I1 on the current coil 16 is recorded after the work is stabilized, then, the last group of capacitors is input, and the current value I2 on the current coil 16 at the moment is recorded, and then the current value I0 (I0I 2-I1) is the inrush current value when the last group of capacitors is input.
When the test device is used for discharge detection, firstly, the capacitor in the reactive compensation device 30 is charged, namely, the line change-over switch 20 is adjusted, the access state of the rectifier 12 is adjusted, namely, the rectifier 12 is accessed into a working loop between the resistance load 13 and the transformer 11, and the electric voltage regulator 10 is adjusted, so that the direct-current voltage value loaded on the reactive compensation device 30 is the rated voltage peak value of the capacitor, the capacitor in the reactive compensation device 30 is charged through the rectifier 12 and the resistance load 13, and after the charging is finished, the discharge test work is started: the line change-over switch 20 is adjusted to make the transformer 11 exit the working loop, so as to switch to the amplifying loop of the reactive power compensation device 30, the reactive power compensation device 30 amplifies through the resistive load 13, meanwhile, the line change-over switch 20 switches the timer 14 into the loop, the timer 14 starts to time, when the voltage detection loop 15 detects that the voltage value of the capacitor in the reactive power compensation device 30 is reduced to a preset value (for example, 50V), the timer 14 stops to time, and at this time, the display time of the timer 14 is the discharging time of the capacitor.
Therefore, through the testing device with the structure, dynamic effect time detection of the reactive compensation device 30 can be completed through one set of device, power frequency overvoltage protection detection, four test items such as inrush current protection detection and discharge detection are realized, when the test items are changed, only the line change-over switch 20 needs to be operated, and a test line does not need to be built again, so that the workload of building the testing device of the reactive compensation device 30 is effectively reduced, the testing efficiency is improved, the system integration level is high, the operation is simple and convenient, and 14 visual reading test data of the timer can be obtained, and the testing accuracy is improved.
Further, the transformer 11 includes a first transformer 110 and a second transformer 111 selectively connected to the electric voltage regulator 10 under the control of the line switcher 20, and the second transformer 111 is connected to the line switcher 20 through the rectifier 12, and the line switcher 20 can adjust the power factor output from the first transformer 110. During the dynamic response time detection, the power frequency overvoltage protection detection and the inrush current protection detection, the first transformer 110 is controlled by the line transfer switch 20 to be included in the loop of the resistive load 13, so that the second transformer 111 and the rectifier 12 exit the loop of the resistive load 13. In the charging process of the discharging test, the second transformer 111 and the rectifier 12 are controlled by the line transfer switch 20 to be connected to the charging loop where the resistive load 13 is located, so that the first transformer 110 exits from the charging loop where the resistive load 13 is located.
For the way that the line switcher 20 changes the power factor output by the first transformer 110, the utility model discloses the following two specific embodiments:
1. the winding of the first transformer 110 includes two connection structures having different power factors, and the line switcher 20 changes the power factor of the output of the first transformer 110 by adjusting the winding connection structure of the first transformer 110. Specifically, the windings of the first transformer 110 include a star connection structure and a delta connection structure, and when the windings of the first transformer 110 are in the star connection structure, the output power factor thereof is 1, and when the windings of the first transformer 110 are in the delta connection structure, the output power factor thereof is 0.8.
2. The line switcher 20 changes the power factor output by the first transformer 110 by changing the access resistance value of the resistive load 13. In this embodiment, the resistive load 13 may be a sliding rheostat with a variable resistance, or may include several groups of resistors, and the resistance of the resistive load 13 is changed by adjusting the number of the connected resistors.
Further, an ammeter connected with the current coil 16 and a voltmeter 18 are further arranged on the test bed, the voltmeter 18 is respectively connected with the electric voltage regulator 10, the timer 14 and the line change-over switch 20, and the line change-over switch 20 is used for changing an access loop of the voltmeter 18. In this embodiment, the current value of the current coil 16 is displayed by the ammeter, and the voltage value output by the transformer 11 is displayed by the voltmeter 18, so that the test operation is more convenient.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, so that the present invention will not be limited by the accompanying claims.
Claims (6)
1. An integrated low-voltage complete reactive compensation testing device is characterized by comprising a test bed, wherein an electric voltage regulator, a transformer, a rectifier, a multi-contact line change-over switch, a resistive load, a timer, a voltage detection loop and a current coil are arranged on the test bed;
the electric voltage regulator, the rectifier, the transformer, the timer and the resistance load are all connected to the line transfer switch, and the electric voltage regulator is also connected with the rectifier through the transformer;
the resistance load is also connected with a multi-path switching terminal, the multi-path switching terminal is also connected with the current coil and the voltage detection loop, and the multi-path switching terminal is provided with a switching port connected with a reactive power compensation device to be detected; the voltage detection loop is used for detecting the voltage of the reactive power compensation device, and the timer is also connected with the voltage detection loop so as to start or end timing according to the feedback of the voltage detection loop;
the line transfer switch is used for adjusting the rectifier, the resistive load and a working loop of the timer, and is also used for adjusting the power factor of the transformer.
2. The integrated complete reactive compensation testing device for low voltage according to claim 1, wherein the transformer comprises a first transformer and a second transformer selectively connected to the electric voltage regulator under the control of the line switcher, and the second transformer is connected to the line switcher through the rectifier, and the line switcher adjusts the power factor output by the first transformer.
3. The integrated low voltage complete reactive compensation test device according to claim 2, wherein the winding of the first transformer comprises two connection structures with different power factors, and the line transfer switch changes the power factor of the output of the first transformer by adjusting the winding connection structure of the first transformer.
4. The integrated low-voltage complete reactive compensation testing device according to claim 3, wherein the windings of the first transformer comprise a star connection structure and a delta connection structure.
5. The integrated low-voltage complete reactive compensation testing device according to claim 2, wherein the line transfer switch changes the power factor of the output of the first transformer by changing the access resistance value of the resistive load.
6. The integrated low-voltage complete reactive compensation testing device according to claim 1, wherein an ammeter connected with the current coil and a voltmeter are further arranged on the test bed, the voltmeter is respectively connected with the electric voltage regulator, the timer and the line change-over switch, and the line change-over switch is used for changing an access loop of the voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220325933.8U CN217063300U (en) | 2022-02-17 | 2022-02-17 | Integrated low-voltage complete reactive compensation testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220325933.8U CN217063300U (en) | 2022-02-17 | 2022-02-17 | Integrated low-voltage complete reactive compensation testing device |
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| Publication Number | Publication Date |
|---|---|
| CN217063300U true CN217063300U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220325933.8U Active CN217063300U (en) | 2022-02-17 | 2022-02-17 | Integrated low-voltage complete reactive compensation testing device |
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| CN (1) | CN217063300U (en) |
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- 2022-02-17 CN CN202220325933.8U patent/CN217063300U/en active Active
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