CN215180535U - Direct current power electronic transformer test system - Google Patents
Direct current power electronic transformer test system Download PDFInfo
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- CN215180535U CN215180535U CN202120147692.8U CN202120147692U CN215180535U CN 215180535 U CN215180535 U CN 215180535U CN 202120147692 U CN202120147692 U CN 202120147692U CN 215180535 U CN215180535 U CN 215180535U
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Abstract
A direct current power electronic transformer test system is provided with a direct current power supply device assembly, a power analyzer, a wave recorder and a circuit breaker assembly, wherein the direct current power supply device assembly is connected with a tested device through the circuit breaker assembly, the power analyzer is connected with the direct current power supply device assembly and the tested device, and the wave recorder is connected with the direct current power supply device assembly and the tested device. The direct current power supply device is used for providing power for the device to be tested. The power analyzer is used for acquiring power data of the device to be tested. The wave recorder is used for collecting ripple data of the device to be tested. The test system of the direct current power electronic transformer can test and evaluate the electrical performance and the protection function of the direct current power electronic transformer.
Description
Technical Field
The utility model relates to a power electronic technology detection area, in particular to direct current power electronic transformer test system.
Background
Since the invention of the 19 th century, power transformers have become the basic component of power transmission and distribution systems. Although the traditional power transformer has the advantages of simple manufacturing process, high reliability and the like, the traditional power transformer can only realize voltage level conversion and insulation isolation, has single function, cannot realize the isolation of fault current and voltage at two sides of the transformer due to the electromagnetic coupling of the primary side and the secondary side of the transformer, and limits the fault range; the isolation of distortion current and interference voltage at two sides of the transformer cannot be realized, so that sensitive loads are influenced on one hand, and power grid pollution is caused on the other hand; in addition, the transformer also has the problems of excitation surge current, uneven distribution and circulation of parallel operation load, environment pollution caused by insulating oil and the like.
In the last 70 th century, the concept of power electronic transformers (devices under test) was proposed, which utilize power electronic converter technology to implement voltage conversion and energy transfer. The method is characterized in that the amplitude and the phase of the primary and secondary alternating-current side voltage and current are continuously and controllably adjusted through a voltage type converter. Therefore, the power electronic transformer can overcome the defects of the traditional transformer and solve the problems of electromagnetic looped network, electric energy quality, reactive dynamic compensation, improvement of system stability limit and the like of a power system.
In the prior art, no relevant national standard and detection and authentication standard exist. At present, the power electronic transformer has no relevant detection and authentication standard and cannot accurately detect and evaluate a system for performance and functions of the power electronic transformer.
Therefore, it is necessary to provide a dc power electronic transformer testing system to solve the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to avoid prior art's weak point and provide a direct current power electronic transformer test system. The test system of the direct current power electronic transformer can test and evaluate the electrical performance and the protection function of the direct current power electronic transformer.
The above object of the present invention is achieved by the following technical measures:
the direct-current power electronic transformer testing system is provided with a direct-current power supply device assembly, a power analyzer, a wave recorder and a circuit breaker assembly, wherein the direct-current power supply device assembly is connected with a tested device through the circuit breaker assembly, the power analyzer is connected with the direct-current power supply device assembly and the tested device, and the wave recorder is connected with the direct-current power supply device assembly and the tested device.
The direct current power supply device is used for providing power for the device to be tested.
The power analyzer is used for acquiring power data of the device to be tested.
The wave recorder is used for collecting ripple data of the device to be tested.
Preferably, the dc power supply device module is provided with a +10kV dc power supply device, a-10 kV dc power supply device, and a 750V dc power supply device.
The utility model discloses direct current power electronic transformer test system is two-way power flow direction.
Preferably, the bidirectional power flow direction is ± 10kV to 750V and 750V to ± 10 kV.
Preferably, the circuit breaker assembly is provided with a CB1 circuit breaker, a CB2 circuit breaker and a CB3 circuit breaker, wherein the output end of the +10kV direct-current power supply device is connected with the CB1 circuit breaker in series and connected with the first connecting end of the tested device, the output end of the-10 kV direct-current power supply device is connected with the CB2 circuit breaker in series and connected with the second connecting end of the tested device, and the output end of the 750V direct-current power supply device is connected with the CB3 circuit breaker in series and connected with the third connecting end of the tested device.
Preferably, the first connection end of the power analyzer is connected to the first connection end of the device to be tested, the second connection end of the power analyzer is connected to the second connection end of the device to be tested, and the third connection end of the power analyzer is connected to the third connection end of the device to be tested.
Preferably, the first connection end of the wave recorder is connected with the first connection end of the device to be tested, the second connection end of the wave recorder is connected with the second connection end of the device to be tested, and the third connection end of the wave recorder is connected with the third connection end of the device to be tested.
The utility model discloses a direct current power electronic transformer test system still is provided with the computer, the computer with power analyzer's fourth link with the fourth link of oscillograph is connected.
Preferably, the computer is used to obtain the test results.
Preferably, the power analyzer is a WT5000 power analyzer.
Preferably, the wave recorder is a DL850 wave recorder.
The utility model discloses a direct current power electronic transformer test system is provided with direct current power supply unit subassembly, power analysis appearance, oscillograph and circuit breaker subassembly, and direct current power supply unit subassembly passes through the circuit breaker subassembly and is connected with the device under test, and power analysis appearance and direct current power supply unit subassembly are connected with the device under test, and the oscillograph is connected with direct current power supply unit subassembly and the device under test. The direct current power supply device is used for providing power for the device to be tested. The power analyzer is used for acquiring power data of the device to be tested. The wave recorder is used for collecting ripple data of the device to be tested. The test system of the direct current power electronic transformer can test and evaluate the electrical performance and the protection function of the direct current power electronic transformer.
Drawings
The present invention will be further described with reference to the accompanying drawings, but the contents in the drawings do not constitute any limitation to the present invention.
Fig. 1 is a connection diagram of a dc power electronic transformer test system according to embodiment 1.
Fig. 2 is a flowchart of the efficiency test of the dc power electronic transformer of embodiment 2.
Fig. 3 is a flowchart of a ripple test of the dc power electronic transformer according to embodiment 3.
Fig. 4 is a flowchart of the step response test of the dc power electronic transformer in embodiment 4.
Fig. 5 is a flowchart of a low voltage ride through test in the low fault ride through test of the dc power electronic transformer of embodiment 5.
Fig. 6 is a flowchart of a high voltage ride through test in a low fault ride through test of a dc power electronic transformer of embodiment 6.
Detailed Description
The technical solution of the present invention will be further explained by the following examples.
Example 1.
A direct current power electronic transformer test system is provided with a direct current power supply device assembly, a power analyzer, a wave recorder and a circuit breaker assembly as shown in figure 1, wherein the direct current power supply device assembly is connected with a tested device through the circuit breaker assembly, the power analyzer is connected with the direct current power supply device assembly and the tested device, and the wave recorder is connected with the direct current power supply device assembly and the tested device.
The direct current power supply device is used for providing power supply for the device to be tested; the power analyzer is used for acquiring power data of the device to be tested; the wave recorder is used for collecting ripple data of the tested device.
The utility model discloses a DC power supply unit subassembly is provided with +10kV DC power supply unit, -10kV DC power supply unit and 750V DC power supply unit.
The direct current power electronic transformer test system has a bidirectional power flow direction. The specific bidirectional power flow direction is +/-10 kV-750V and 750V- +/-10 kV.
The circuit breaker assembly is provided with a CB1 circuit breaker, a CB2 circuit breaker and a CB3 circuit breaker, wherein the output end of the +10kV direct-current power supply device is connected with the CB1 circuit breaker in series and connected with a first connecting end of the tested device, the output end of the-10 kV direct-current power supply device is connected with the CB2 circuit breaker in series and connected with a second connecting end of the tested device, and the output end of the 750V direct-current power supply device is connected with the CB3 circuit breaker in series and connected with a third connecting end of the tested device.
The first connecting end of the power analyzer is connected with the first connecting end of the tested device, the second connecting end of the power analyzer is connected with the second connecting end of the tested device, and the third connecting end of the power analyzer is connected with the third connecting end of the tested device.
The first connecting end of the wave recorder is connected with the first connecting end of the tested device, the second connecting end of the wave recorder is connected with the second connecting end of the tested device, and the third connecting end of the wave recorder is connected with the third connecting end of the tested device.
The utility model discloses a direct current power electronic transformer test system still is provided with the computer, the computer with power analyzer's fourth link with the fourth link of oscillograph is connected. Wherein the computer is used to obtain the test results. The power analyzer is a WT5000 power analyzer. The wave recorder is a DL850 wave recorder.
The utility model discloses a direct current power electronic transformer test system's operation process as follows: firstly, closing a CB1 circuit breaker and a CB2 circuit breaker to enable a +10kV direct-current power supply device and a-10 kV direct-current power supply device to output 10kV voltage; then the CB3 breaker is closed again, so that the 750V direct-current power supply device is started and outputs 750V voltage; and then starting the direct current power electronic transformer, and setting the running power and the running direction. And the power analyzer and the wave recorder are used for data acquisition through related test items and then transmitted to the computer through the network port for secondary data processing to obtain a test result.
The test system of the direct current power electronic transformer can test and evaluate the electrical performance and the protection function of the direct current power electronic transformer.
Example 2.
Based on the dc power electronic transformer test system of embodiment 1, the dc power electronic transformer efficiency test is performed, as shown in fig. 2, specifically including the following steps:
step one, closing a CB1 circuit breaker and a CB2 circuit breaker, and starting a +10kV direct-current power supply device and a-10 kV direct-current power supply device;
step two, closing the CB3 circuit breaker and starting a 750V direct-current power supply device;
step three, starting the direct current power electronic transformer, and then setting the output power as the full power and the direction of setting the power;
step four, delaying for 1min to 5min until the output power of the direct current power electronic transformer is stable;
step five, the power analyzer collects power data of the power electronic transformer 180 s;
step six, judging whether the forward power and reverse power measuring points are finished, if not, returning to the step three, and if so, entering the step seven;
and step seven, the power analyzer transmits the acquired power data to the computer, and the computer generates a chart and a curve graph of the test result.
The test system of the direct current power electronic transformer tests and evaluates the electrical performance and the protection function of the direct current power electronic transformer. The system can be used for testing and knowing the performance of the direct current power electronic transformer and can also realize automatic testing and analysis of efficiency.
Example 3.
Based on the dc power electronic transformer test system of embodiment 1, a ripple test of the dc power electronic transformer is performed, as shown in fig. 3, specifically including the following steps:
step one, closing a CB1 circuit breaker and a CB2 circuit breaker, and starting a +10kV direct-current power supply device and a-10 kV direct-current power supply device;
step two, closing the CB3 circuit breaker and starting a 750V direct-current power supply device;
step three, starting the direct current power electronic transformer, and then setting the output power and the direction of the power;
step four, delaying for 1min to 5min until the output power of the direct current power electronic transformer is stable;
step five, the wave recorder collects ripple wave data of the power electronic transformer;
step six, judging whether the forward ripple test and the reverse ripple test are finished, if not, returning to the step three, and if so, entering the step seven;
and step seven, the wave recorder transmits the collected ripple data to the computer, and the computer generates a chart of the test result.
The test system of the direct current power electronic transformer tests and evaluates the electrical performance and the protection function of the direct current power electronic transformer. The system can be used for testing and knowing the performance of the direct current power electronic transformer and can also realize automatic testing and analysis of efficiency.
Example 4.
Based on the test system of the dc power electronic transformer in embodiment 1, a power step response test of the dc power electronic transformer is performed, as shown in fig. 4, specifically including the following steps:
step one, closing a CB1 circuit breaker and a CB2 circuit breaker, and starting a +10kV direct-current power supply device and a-10 kV direct-current power supply device;
step two, closing the CB3 circuit breaker and starting a 750V direct-current power supply device;
step three, starting the direct current power electronic transformer, and then setting the output power as full power and setting the power direction as a positive direction;
step four, delaying for 1min to 5min until the output power of the direct current power electronic transformer is stable;
step five, setting the output power as full power and setting the power direction as a negative direction;
step six, until the power step of the direct current power electronic transformer is finished, the oscillograph collects the data of the power electronic transformer and analyzes the power step response time;
and step seven, the wave recorder transmits the acquired data to the computer, and the computer generates a chart and a curve graph of the test result.
The test system of the direct current power electronic transformer tests and evaluates the electrical performance and the protection function of the direct current power electronic transformer. The system can be used for testing and knowing the performance of the direct current power electronic transformer and can also realize automatic testing and analysis of efficiency.
Example 5.
Based on the test system of the dc power electronic transformer in embodiment 1, a low voltage ride through test in a low fault ride through test of the dc power electronic transformer is performed, as shown in fig. 5, which includes the following specific steps:
step one, closing a CB1 circuit breaker and a CB2 circuit breaker, and starting a +10kV direct-current power supply device and a-10 kV direct-current power supply device;
step two, closing the CB3 circuit breaker and starting a 750V direct-current power supply device;
step three, starting the direct current power electronic transformer, and then setting the output power as the full power and setting the power direction;
step four, delaying for 1min to 5min until the output power of the direct current power electronic transformer is stable;
fifthly, adjusting the drop voltage percentage of the +10kV direct-current power supply device and the-10 kV direct-current power supply device and the drop maintaining time t;
step six, the oscillograph collects data of the power electronic transformer;
step seven, judging whether the forward test and the reverse test are finished, if not, returning to the step three, and if so, entering the step eight;
and step eight, the wave recorder transmits the acquired data to the computer, and the computer generates a chart of the test result.
Wherein the percent sag voltage is 90%, 80%, or 60% and t is 150 ms.
The test system of the direct current power electronic transformer tests and evaluates the electrical performance and the protection function of the direct current power electronic transformer. The system can be used for testing and knowing the performance of the direct current power electronic transformer and can also realize automatic testing and analysis of efficiency.
Example 6.
Based on the test system of the dc power electronic transformer in embodiment 1, a high voltage ride through test in a low fault ride through test of the dc power electronic transformer is performed, as shown in fig. 6, which includes the following specific steps:
step one, closing a CB1 circuit breaker and a CB2 circuit breaker, and starting a +10kV direct-current power supply device and a-10 kV direct-current power supply device;
step two, closing the CB3 circuit breaker and starting a 750V direct-current power supply device;
step three, starting the direct current power electronic transformer, and then setting the output power as the full power and setting the power direction;
step four, delaying for 1min to 5min until the output power of the direct current power electronic transformer is stable;
fifthly, adjusting the drop rated voltage percentage of the +10kV direct-current power supply device and the-10 kV direct-current power supply device and the drop maintaining time t;
step six, the oscillograph collects data of the power electronic transformer;
step seven, judging whether the forward test and the reverse test are finished, if not, returning to the step three, and if so, entering the step eight;
and step eight, the wave recorder transmits the acquired data to the computer, and the computer generates a chart of the test result.
Where the drop rating voltage percentage is 110% or 120% and t is 150 ms.
The test system of the direct current power electronic transformer tests and evaluates the electrical performance and the protection function of the direct current power electronic transformer. The system can be used for testing and knowing the performance of the direct current power electronic transformer and can also realize automatic testing and analysis of efficiency.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A direct current power electronic transformer test system which characterized in that: the device is provided with a direct-current power supply device assembly, a power analyzer, a wave recorder and a breaker assembly, wherein the direct-current power supply device assembly is connected with a device to be tested through the breaker assembly;
the direct current power supply device is used for providing power supply for the device to be tested;
the power analyzer is used for acquiring power data of a tested device;
the wave recorder is used for collecting ripple data of the device to be tested.
2. The direct current power electronic transformer test system of claim 1, wherein: the direct-current power supply device assembly is provided with a +10kV direct-current power supply device, a-10 kV direct-current power supply device and a 750V direct-current power supply device.
3. The direct current power electronic transformer test system of claim 2, wherein: is a bi-directional power flow direction.
4. The direct current power electronic transformer test system of claim 3, wherein: the bidirectional power flow direction is +/-10 kV-750V and 750V- +/-10 kV.
5. The direct current power electronic transformer test system of claim 4, wherein: the circuit breaker assembly is provided with a CB1 circuit breaker, a CB2 circuit breaker and a CB3 circuit breaker, wherein the output end of a +10kV direct-current power supply device is connected with the CB1 circuit breaker in series and connected with a first connecting end of a tested device, the output end of a-10 kV direct-current power supply device is connected with the CB2 circuit breaker in series and connected with a second connecting end of the tested device, and the output end of a 750V direct-current power supply device is connected with the CB3 circuit breaker in series and connected with a third connecting end of the tested device.
6. The direct current power electronic transformer test system of claim 5, wherein: the first connecting end of the power analyzer is connected with the first connecting end of the device to be tested, the second connecting end of the power analyzer is connected with the second connecting end of the device to be tested, and the third connecting end of the power analyzer is connected with the third connecting end of the device to be tested.
7. The direct current power electronic transformer test system of claim 6, wherein: the first connecting end of the wave recorder is connected with the first connecting end of the tested device, the second connecting end of the wave recorder is connected with the second connecting end of the tested device, and the third connecting end of the wave recorder is connected with the third connecting end of the tested device.
8. The direct current power electronic transformer test system of claim 7, wherein: the computer is connected with the fourth connecting end of the power analyzer and the fourth connecting end of the wave recorder;
the computer is used for obtaining a test result.
9. The direct current power electronic transformer test system of claim 8, wherein: the power analyzer is a WT5000 power analyzer.
10. The direct current power electronic transformer test system of claim 9, wherein: the wave recorder is a DL850 wave recorder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120147692.8U CN215180535U (en) | 2021-01-19 | 2021-01-19 | Direct current power electronic transformer test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120147692.8U CN215180535U (en) | 2021-01-19 | 2021-01-19 | Direct current power electronic transformer test system |
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| CN215180535U true CN215180535U (en) | 2021-12-14 |
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| CN202120147692.8U Active CN215180535U (en) | 2021-01-19 | 2021-01-19 | Direct current power electronic transformer test system |
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