JB/T 7143.1-1993 Technical requirements for inverters for wind turbine generator sets
Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T7143.1-93
Inverter for wind turbine generator set
Technical conditions
Published on November 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on March 1, 1994
Machinery Industry Standard of the People's Republic of China
Inverter for wind turbine generator set
Technical conditions
Subject content and scope of application
JB/T7143.193
This standard specifies the terminology, classification, basic parameters, model compilation, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of inverters for wind turbine generator sets. This standard applies to inverters for charging type wind turbine generator sets (hereinafter referred to as inverters). 2 Reference standards
GB2681
GB2900.33
GB3859
GB4025
JB1505
JB4277
JB/T6949.1
JB/T 7143.2
3 Terminology
Wire color in electrical complete sets
Electrical terminology Converter
Semiconductor power converter
Indicator light and button color
Technical conditions for single-sided and double-sided printed circuit boards without metallized holes Technical conditions for single-sided and double-sided printed circuit boards with metallized holes Method for compiling semiconductor power converter models Technical conditions for packaging of power semiconductor devices
Technical conditions for controllers for small wind turbines Test methods for converters for wind turbines The terms used in this standard shall comply with the provisions of GB2900.33 and GB3859. Classification and basic parameters of inverters
4.1 Classification of inverters
4.1.1 Inverters are classified according to output power:
100, 200, 500, 1000, 2000, 5000W
4.1.2 Inverters are classified according to input mode:
DC input type: products whose inverter input end is directly connected to the battery: a.
AC input type: products whose inverter input end is connected to the AC output end of the generator of the wind turbine generator set, that is, products with control and inverter transformation.
4.2 Basic parameters of inverters
Rated output parameters AC voltage, AC current, frequency, waveform, power, etc., shall comply with the provisions of Table 1: Rated input parameters: DC voltage, battery capacity, generator power, etc. Among them, the rated DC voltage shall be selected according to the provisions of Table 2. Approved by the Ministry of Machinery Industry on November 21, 1993
Implementation on March 1, 1994
Note, the values in brackets are non-preferred values,
JB/T 7143.1-93
Rated DC voltage
4.3 The model reduction method of the inverter shall comply with the provisions of JB1505. 4.3. 1
Inverter model representation method
4.3.2 Marking example
AC voltage
Wind turbine
AC current
Output frequency/output voltage×output current
一A: natural air cooling
F, wind cooling
Inverter
The semiconductor material used is single crystal silicon
Using thyristor rectifier components
Wind turbine inverter, output power is 100W, output voltage is 220V, output frequency is 50Hz, output current is 0.5A: using natural air cooling, thyristor rectifier single silicon components, its mark is: KGNA-50/220X0.5-FD
5 Technical requirements
5.1 The inverter shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. The inverter should be able to work continuously and reliably under the following conditions. 5.2
Environmental temperature: -10~+40℃:
Relative humidity of air should be less than 85% (when the air temperature is 20±5℃); Altitude should not exceed 1000m+
Operation site should be free of conductive and explosive dust, and no gas that corrodes metal and damages insulation: Operation site should be free of vibration and impact,
5:3 The inverter should have a voltage regulator. When the auxiliary input DC voltage is in the range of 85% to 120% of the rated value, the output voltage should not exceed 5% of the rated voltage.
JB/T7143.193
5.4 The output power of the inverter shall not exceed ±10% of the specified value. 5.5 The output waveform of the inverter is a square wave, and (a-b)/6 in the waveform is not greater than 20%, as shown in the figure below. When the user makes requirements for the output waveform, the waveform and harmonic content are determined by agreement between the user and the manufacturer. Output waveform diagram
a-Overshoot voltage value: 6-Waveform voltage value 5.6 Inverter efficiencywwW.bzxz.Net
Under rated conditions, the efficiency of inverters with an output power of no more than 500W is not less than 75%; the efficiency of inverters with an output power of more than 500W is not less than 80%. For inverters with sinusoidal output, the efficiency is determined by agreement between the user and the manufacturer. 5.7 Inverter temperature rise
Under rated load and normal use conditions, the temperature rise of the main components of the inverter is: a.
When the power semiconductor devices and other components (quality control, rectifier tubes, etc.) are measured by the thermometer method, the temperature rise should comply with the relevant standard regulations. When the transformer and reactor are measured by the resistance method, the temperature rise of E-class insulation shall not exceed 75C. The temperature rise of A-class insulation shall not exceed 60C. The temperature rise of plastic insulated wires and rubber wires connected to semiconductor devices should not exceed 45℃. 5.8 The inverter should be equipped with the following protection devices: a.
Output short-circuit protection: The short-circuit protection action time should not exceed 0.5$; Input reverse connection protection: When the positive and negative poles of the input terminal are reversed, the inverter should have protective measures and display devices: b.
Input undervoltage protection: When the battery voltage is lower than 85% of the rated voltage, the inverter should have protective devices and display devices. C
5.9 Load level
The inverter should be able to work continuously for not less than 8 hours at rated current. It is allowed to work continuously for 20 minutes at 1.2 times the rated current. 5.10 Vibration and free fall
After the inverter has been subjected to the grip and free fall test specified in Article 4.7 of JB/T7143.2, its main performance can still meet the requirements of normal operation.
5.11 Insulation resistance and dielectric strength
The insulation resistance between the live circuit and the ground (housing) should be no less than 20M0 when the ambient temperature is 20℃ and the relative intercept is 85%. The circuit and the housing should be able to withstand a practical sinusoidal voltage of 1500V at 50Hz for 1min without breakdown.
5.12 Requirements for components and auxiliary parts
a. All components and auxiliary parts shall comply with the provisions of relevant standards and installation procedures: Printed circuit boards shall comply with the provisions of GB4588.1 and GB4588.2: b.
The colors of indicator lights and buttons shall comply with the provisions of GB4025, and the colors of wires and busbars shall comply with the provisions of GB2681: After welding, printed boards, plug-ins, etc. shall be able to withstand vibration and high and low temperature cycle tests under specified conditions, and their electrical performance shall comply with the requirements of relevant 3
JB/T7143.1-93
standards. The main components shall not have defects such as cold soldering, desoldering or falling off, and the surrounding parts shall not have defects such as looseness: e. The cross-section of the wire to be welded shall be selected according to the specified cross-section, and the insulation voltage of the wire shall correspond to the rated working voltage of the circuit. 5.13 Marking of input and output terminals
The positive and negative poles and the output terminals shall be clearly marked at the wiring. 5.14 Noise
The inverter noise should be no more than 65dB(A),
5.15 Appearance
The front and rear panels and other exposed parts of the inverter should be painted or plated, and the surface of the plated layer should be flat and smooth, with uniform color and firmness. 5.16 The average running time before the first failure should be no less than 1500h. 5.17 For AC input inverters, the provisions of JB/T6949.1 and this standard shall be followed. 6 Test methods
The various performance tests of the inverter shall be carried out in accordance with the provisions of JB/T7143.2. 7 Inspection rules
The inspection of the inverter is divided into factory inspection and type inspection. 7.1 Factory inspection
7.1.1 The inverters shall be inspected one by one and can only be shipped after passing the inspection of the quality inspection department. 7.1.2 The items of factory inspection shall be carried out in accordance with the requirements of Articles 5.3 to 5.5 and Articles 5.8, 5.11, 5.13, 5.15, 8.1 and 8.2 of this standard.
7.13 In the factory inspection, if all performance indicators meet the requirements, they will be judged as qualified. If there are unqualified items, they will be re-inspected after repair. Those that are repaired will be judged as qualified, otherwise they will be unqualified. 7.1.4 If the product is judged as qualified after the factory inspection, a certificate of conformity should be issued. 7.2 Type inspection
When the product has one of the following conditions, a type inspection should be carried out: a.
Trial production and identification of new products or old products transferred to the factory for production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, mass-produced inverters should be type-tested once a year: when the product has been discontinued for more than 3 years and production is resumed: when the national quality supervision agency proposes a requirement for type inspection; when the results of the factory inspection are significantly different from the last type inspection, the type inspection items shall be carried out in accordance with all the items specified in Chapter 5 of this standard. The samples for type inspection shall be randomly selected from the product batch. When the batch number N=26～50, the normal inspection single sampling method shall be adopted. The classification and sampling plan of unqualified quality are shown in Table 3. 7.2.3 Judgment rules When the cumulative number of unqualified products in the inspected category is less than or equal to the category judgment number Ac, the whole batch of products in this category shall be judged as qualified; when the cumulative number of unqualified products in the inspected category is greater than or equal to the unqualified judgment number Re, the whole batch of products in this category shall be judged as unqualified; when the product is judged as qualified in both categories A and B, the whole batch of products shall be judged as qualified, otherwise it shall be judged as unqualified. Sampling
Classification of non-conformities
Non-conformity items
Item effectiveness
Inspection level
Huabenxue code
Sample size
Marking, packaging, transportation and storage
JB/T7143.1-93
Output voltage test
Efficiency test
Temperature rise test
Protection device test
Load level test
Output rated rate test
Output waveform test
Vibration and drop test Test
Insulation resistance/dielectric strength test
Quality of components and accessories
Marking of input and output terminals
Sound test
Quality of residual coating
Average running time before first failure
Each inverter should be equipped with a label, the characters on the label should be clear and neat, and the product label should include the following contents8.1
Manufacturer name:
Product name:
Product model or mark:
Main parameters of the product;
Factory date or factory number.
The inverter should be packed with outer packaging and anti-vibration measures should be taken. The packaging should meet the requirements of Chapter 3 of JB4277. The following documents should be brought with the packaging box:
Product certificate:;
Product manual;
Packing list;
List of accessories.
8.3 The inverter should be covered during transportation, and there should be no severe vibration, impact or inversion during transportation. 8.4 The inverter should be stored in a ventilated warehouse without corrosive gas and conductive dust. 9
Quality assurance period
If the user complies with the installation and use regulations of the product, within 12 months from the date of purchase, if the product cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge. 5
JB/T7143.1-93
Additional instructions:
This standard was proposed and managed by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Hohhot Animal Husbandry Machinery Research Institute. The main drafter of this standard is Li Huan.
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