This standard specifies the test conditions, test contents and test methods for the working performance of inverters for wind turbine generator sets. This standard applies to inverter products for charging type power generator sets (hereinafter referred to as inverters). JB/T 7143.2-1993 Test methods for inverters for wind turbine generator sets JB/T7143.2-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7143.2-93
Inverter for wind turbine generator set
Test method
Published on November 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on March 1, 1994
Mechanical Industry Standard of the People's Republic of China
Inverter for wind turbine generator set
Test method
Subject content and scope of application
JB/T 7143.293
This standard specifies the test conditions, test content and test methods for the working performance of inverter for wind turbine generator set. This standard applies to inverter products for charging type wind turbine generator set (hereinafter referred to as inverter). 2 Reference standards
GB2423
GB3768
GB3859
Basic environmental test procedures for electrical and electronic products Simple method for determining the sound power level of noise sources
Semiconductor power converter
JB/T6949.2 Test method for controllers for small wind turbines JB/T7143.1 Technical conditions for inverters for wind turbines ZBK84-001.1 Product varieties and specifications of lead-acid batteries for energy storage 3 Test conditions
3.1 If there are no special requirements, all tests of the inverter should be carried out under the conditions specified in Article 5.2 of JB/T7143.1. 3.2 The test should be carried out under electrical conditions equivalent to the actual work. If this requirement cannot be met, it should be carried out under conditions that meet the technical requirements of the inverter.
3.3 The test instruments and meters shall be calibrated and qualified, and their accuracy level shall comply with the provisions of Appendix A (reference). 3.4 There shall be no less than 2 test prototypes.
4 Test content and test methods
The test content and methods specified in this standard are applicable to DC input type inverters. For AC input type inverters, they can be carried out in accordance with JB/T6949.2 and in reference to the relevant provisions of this standard. The test methods for the output voltage, frequency, waveform, efficiency, protection performance and load level of the inverter are all connected according to the schematic diagram shown in Figure 1.
4.1 Determination of output voltage and frequency
4.1.1 The voltage of the DC regulated power supply used in the test shall be continuously adjustable within the allowable range of the inverter input voltage, and the load shall be an adjustable resistive load.
Approved by the Ministry of Machinery Industry on November 21, 1993
Implemented on March 1, 1994
DC adjustable voltage regulator
JB/T 7143.293
KGNA-50/220x1-FL
Inverter
A-DC ammeter, V-DC voltmeter: A-AC effective value ammeter, V-AC effective value voltmeter 4.1.2 The test is carried out in the following steps
Adjust the output voltage of the DC regulated power supply to the rated voltage value of the inverter input voltage: adjust the negative resistor to make the output power of the inverter the rated power; adjustable frequency
Slowly adjust the DC regulated power supply. Make its voltage value change within the range of 85% to 120% of the rated voltage: measure its output voltage and duty cycle, measure 3 times in total, and fill in the measured values ​​and arithmetic mean values ​​in Table 2.4.2 Determination of output waveform
The test is carried out in the following steps:
Adjust the output voltage of the DC regulated power supply to the rated value of the inverter input voltage; b.
Table 6.
Adjust the load resistance so that the inverter output power is rated power: Connect the oscilloscope probe to the inverter output terminal of Figure 1 and observe its output waveform (see Figure 2). Calculate the value of (a-b)/b and fill it in the output waveform diagram of Figure 2.
a-uprush voltage value, h-waveform voltage value
4.3 Determination of efficiency
The test is carried out in the following steps:
Adjust the output voltage of the DC regulated power supply to the rated value of the inverter input voltage: a.
b. Adjust the load resistance so that the inverter output power is rated power; measure its input DC voltage, DC current, output AC voltage and AC current for 3 consecutive times. Fill the measured values ​​in Table 3 and calculate the efficiency according to formula (1).
Wherein: —efficiency, %;
-output AC voltage, V; www.bzxz.net
output AC current, A:
Vc——input DC voltage, V:
In: —input DC current, A.
4.4 Temperature rise test
4.4.1 The test can be carried out simultaneously with the efficiency test. 4.4.2 The test is carried out in the following steps:
JB/T7143.2-93
Vaelac
VpcIpc
When the inverter works continuously for more than 2 hours under rated load, the measurement can be carried out: Use a semiconductor point thermometer to measure the temperature of the hottest point of components such as thyristors and silicon rectifiers: (1)
For transformers and reactors, use the resistance method to measure the hot resistance of the winding and the cold resistance of the same winding, as well as the cold temperature of the winding. For copper windings, use a bridge or digital milliohmmeter to measure the hot resistance of the winding and the cold resistance of the same winding. The temperature rise is calculated according to formula (2): T-
Where: T—winding hot temperature rise, C:
R——winding hot resistance, O;
winding cold resistance, Q;
t——-winding cold temperature, C
1)(235+)
d. Each measurement is carried out 3 times, and the measured results and arithmetic mean are filled in Table 4. 4.5 Protection performance test
4.5.1 Short-circuit protection test
Adjust the DC regulated power supply and load to reach the rated state of the inverter. Short-circuit the load and measure the action time of the short-circuit automatic protection system. Perform this test 5 times in a row and fill in the test results in Table 5. 4.5.2 Undervoltage protection test
When the input DC voltage drops below 85% of the rated voltage, observe whether the inverter's protection device is reliable and whether the display is correct, and fill in the results in Table 5.
4.5.3 Input power reverse connection protection
Reverse the positive and negative poles of the input DC voltage to observe whether the inverter protection measures are reliable and whether the display is correct. Fill in the results in Table 5.4.6 Load level test
Perform the test in accordance with Article 5.9 of JB/T7143.1 to observe whether it can work normally under different load conditions. Fill in the test results in Table 6.
4.7 Vibration and free fall test
4.7.1 The vibration test and free fall test are carried out in accordance with the procedures and test conditions specified in GB2423.10 and GB2423.8. 4.7.2 The inverter is placed on the vibration test bench and subjected to vibrations with a frequency of 20Hz, an amplitude peak of 0.38mm, and an acceleration peak of 6.0m/s*, and a duration of not less than 10min. Fill in the test results in Table 6. 4.7.3 The free fall test conditions are: free fall impact height is 25mm, free fall times are 2 times, and the angle between the bottom of the prototype and the cement floor is not greater than 3°. Fill in the test results in Table 6. 4.7.4 After the vibration and free fall tests, the inverter should be able to start and work normally. 4.8 Insulation resistance and dielectric strength test
4.8.1 Determination of insulation resistance
a. Use a megohmmeter to measure the insulation resistance. The voltage level of the megohmmeter should comply with the requirements of Table 1; 3
Rated insulation voltage level
>60~250
>250~1000
JB/T7143.2--93
Megohmmeter voltage level
Measure the insulation resistance between the grounded parts of the electrical circuit and the shell and between the conductive parts that are not electrically connected to each other, and fill in the measurement results in Table 6.
4.8.2 Dielectric strength test
a. The dielectric strength test shall be conducted between the circuit and the ground and between conductive parts that are not electrically connected to each other: b. During the test, the switch is in the off position:
During the test, the power applied is not less than 0.5kVA, 50Hz practical sinusoidal AC voltage is 1500V, the test lasts for 1min, and the test results are filled in Table 6.
4.9 Noise measurement
The noise measurement can be carried out at the same time as the load level test: The test is carried out in accordance with the provisions of Article 6.4 of GB3768; b.
c. The sound power level is calculated in accordance with the provisions of Chapter 7 of GB3768, and the results are filled in Table 6. 4.10 Temperature test
4.10.1 Low temperature test
The low humidity test is carried out in accordance with the sequence and test conditions specified in Test Ab in GB2423.1. Place the test sample into the test box (room), then start the cold source to keep the temperature of the test box (room) at -10±3°C, and the inverter load will work continuously for 8 hours. During this period, measure the output value of the inverter every 4 hours and fill in the results in Table 6. 4.10.2 High temperature test
The high temperature test is carried out according to the procedures and test conditions specified in Test Bb of GB2423.2. The tested prototype is placed in the test box (room), and then the heat source is turned on to keep the temperature of the test box (room) at 40±3℃. The inverter load works continuously for 8 hours. During this period, the output value of the inverter is measured every 4 hours, and the results are filled in Table 6. 4.11 The determination of the average operating time before the first failure should be carried out at the actual use site, and the cumulative working time of the inverter from the beginning of installation to the first occurrence of the failure should be recorded, and the results should be filled in Table 6. 5 Test report
5.1 During the test, relevant data and information should be sorted out in time. After the test, the observation, measurement and calculation results should be verified, sorted and summarized, and a test report should be written.
5.2 The test report should include the following contents;
Test overview:
Prototype introduction;
Test conditions and analysis;
Test results and analysis;
Conclusion:
Appendix.
Prototype model:
Manufacturer,
Factory number:
Tester:
Prototype model:
Manufacturer,
Factory number:
Tester:
DC voltage
JB/T 7143. 2—93
Table 2 Output voltage and frequency test record
Test time:
Test location:
Reviewer:
Table 3 Inverter frequency test record
Test time:
Test location:
DC current
Input power
AC voltage
Reviewer:
AC current
Arithmetic mean
Output power
Prototype model:
Manufacturer:
Factory number:
Test items
Crystal tube humidity
Rectifier temperature C||tt ||Group hot resistance 0
Transformer wet rise
Reactor steal rise
Tester:
Prototype model:
Manufacturer:
Factory number:
Test items
Short circuit automatic protection
Action time
Undervoltage protection test
Reverse connection protection test
Tester:
Winding state resistance 0
Winding state temperature C
Winding wet rise C
Winding hot resistance 0
Winding cold resistance 0
Winding cold temperature
Winding avoidance rise C
JB/T 7143.293
Table 4 Inverter temperature rise test record
Test time:
Test location:
Test result
Reviewer,
Table 5 Protection test record
Test time:
Test location:
Test result
Reviewer:
Average value
Arithmetic mean||t t||Prototype model:
Manufacturer:
Factory number:
Tester:
Protection performance
Load level
JB/T7143.2-93
Table 6 Inverter test summary
Test time:
Test location:
Test items
Output voltage V
Output frequency Hz
Output shape
Efficiency%
Temperature rise C
Short circuit protection
Long-term voltage protection
Reverse connection protection
Rated load
1.2 times rated value
Vibration and drop
Insulation resistance/dielectric strength
Extract input mark
Noise dB(A)
Average before first failure Running time h
Visibility test
Temperature test
Low temperature test
Reviewer:
Test results
Technical requirements
JB/T7143.2—93
Appendix A
Main instruments, meters and accuracy grades for test (reference)
The main instruments, meters and accuracy grades for test shall be as specified in Table A1. A1
Additional instructions:
DC voltmeter
DC ammeter
AC effective value voltmeter
AC effective value ammeter
Rated rate meter
Electronic oscilloscope
DC adjustable voltage regulator
Vibration test bench
Adjustable voltage
Digital milliohm meter
Semiconductor point thermometer
Precision sound level meter
Accuracy grade
Type test
Factory test
This standard is proposed and managed by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Hohhot Animal Husbandry Machinery Research Institute. The main drafter of this standard is Li Huan.
DTW type
DTW type2-93
Table 6 Inverter test summary
Test time:
Test location:
Test items
Output voltage V
Output frequency Hz
Output shape
Efficiency %
Temperature rise C
Short circuit protection
Long-term voltage protection
Reverse connection protection
Rated load
1.2 times rated value
Vibration and drop
Insulation resistance/dielectric strength|| tt||Extract input sign
Noise dB(A)
Average running time before first failure h
Visibility test
Temperature test
Low temperature test
Reviewer:
Test results
Technical requirements
JB/T7143.2—93
Appendix A
Main instruments, meters and accuracy grades for test (reference parts)
Main instruments, meters and accuracy grades for test shall be in accordance with the provisions of Table A1. A1
Additional instructions:
DC voltmeter
DC ammeter
AC effective value voltmeter
AC effective value ammeter
Rated rate meter
Electronic oscilloscope
DC adjustable voltage regulator
Vibration test bench
Adjustable voltage
Digital milliohm meter
Semiconductor point thermometer
Precision sound level meter
Accuracy grade
Type test
Factory test
This standard is proposed and managed by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Hohhot Animal Husbandry Machinery Research Institute. The main drafter of this standard is Li Huan.
DTW type
DTW type2-93
Table 6 Inverter test summary
Test time:
Test location:
Test items
Output voltage V
Output frequency Hz
Output shape
Efficiency %
Temperature rise C
Short circuit protection
Long-term voltage protection
Reverse connection protection
Rated load
1.2 times rated value
Vibration and drop
Insulation resistance/dielectric strength|| tt||Extract input sign
Noise dB(A)
Average running time before first failure h
Visibility test
Temperature test
Low temperature test
Reviewer:
Test results
Technical requirements
JB/T7143.2—93
Appendix A
Main instruments, meters and accuracy grades for test (reference parts)
Main instruments, meters and accuracy grades for test shall be in accordance with the provisions of Table A1. A1
Additional instructions:
DC voltmeter
DC ammeter
AC effective value voltmeter
AC effective value ammeter
Rated rate meter
Electronic oscilloscope
DC adjustable voltage regulator
Vibration test bench
Adjustable voltage
Digital milliohm meter
Semiconductor point thermometer
Precision sound level meter
Accuracy grade
Type test
Factory test
This standard is proposed and managed by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Hohhot Animal Husbandry Machinery Research Institute. The main drafter of this standard is Li Huan.
DTW type
DTW type
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