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GB/T 25389.1-2018: Wind turbines - Permanent magnet synchronous generator - Part 1: Technical conditions Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 25389.1: Historical versions
Similar standardsGB/T 25389.1-2018: Wind turbines - Permanent magnet synchronous generator - Part 1: Technical conditions---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25389.1-2018 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.180 F 11 Replacing GB/T 25389.1-2010 Wind turbines - Permanent magnet synchronous generator - Part 1. Technical conditions Issued on: MAY 14, 2018 Implemented on: DECEMBER 01, 2018 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 7 2 Normative references ... 7 3 Terms and definitions ... 8 4 Model, type, basic requirements ... 9 5 Technical requirements ... 9 6 Test methods ... 13 7 Inspection rules ... 13 8 Marks, packaging, environmental protection, safety and use ... 15ForewordGB/T 25389 “Wind turbine low-speed permanent magnet synchronous generator” consists of two parts. - Part 1. Technical conditions; - Part 2. Testing methods. This Part is Part 1 of GB/T 25389. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 25389.1-2010 “Wind turbine low-speed permanent magnet synchronous generator - Part 1. Technical conditions”. Compared with GB/T 25389.1-2010, the main technical deviations are as follows. - “low-speed permanent magnet synchronous generator” in the standard name was modified to “permanent magnet synchronous generator”; - deleted 3 terms. "low speed", "dual three-phase" and "six-phase" (see 3.1, 3.2, 3.3 of Edition 2010); - re-defined the terms "efficiency curve", "power characteristic" (see 3.2, 3.3 of this Edition, 3.5, 3.6 of Edition 2010); - modified the generator model from “TFYD” to “TFY” (see 4.1 of this Edition); - deleted the provisions on nominal power (see 4.2 of Edition 2010); - added the voltage specifications of 400V, 720V, 960V, 1140V, 1250V, 3300V, 4160V (see 4.2 of this Edition, 4.3 of Edition 2010); - added the requirements for stator winding wiring mode, number of joints, time phase sequence, wiring terminal mark; modified “three-phase or dual three-phase or six-phase AC output” to “it may use three-phase or multi- phase winding output terminal” (see 4.3 of this Edition, 4.4 of Edition 2010); - deleted the provisions that “the maximum running speed of generator is not more than 500 r/min” (see 4.6 of Edition 2010); - added the provisions on the rotation direction of generator (see 5.8 of this Edition); - added the requirements for generator bearing (see 4.9 of this Edition); - modified the altitude and the ambient temperature in cold regions (see 5.2 of this Edition); - modified the selection range of Megaohm rating for measurement of moisture-proof heater insulation resistance [see 5.3c) of this Edition, 5.11c) of Edition 2010]; - deleted the temperature rise limit when generator’s operation deviated from the rated (see 5.4 of Edition 2010); - the impact voltage peak and the test method of voltage resistance test of stator winding inter-turns shall comply with the current standard (see 5.4 of this Edition, 5.13 of Edition 2010); - added the matching requirements for generator insulation structure and converter; modified the test value of voltage resistance between phases of generator stator windings and multi-system windings (see 5.5 of this Edition, 5.12 of Edition 2010); - added the requirements for vibration speed limit and vibration measurement after over-speed test (see 5.6 of this Edition); - modified the matching requirements for generator output converter and insulation structure, voltage regulation rate (see 5.5 of this Edition, 5.6 of Edition 2010); - deleted the requirements that the generator was subjected to 1.5 times rated current (5.7 of Edition 2010); - added the noise limit for generator with a rotating speed less than 300 r/min (see 5.7 of this Edition, 5.16 of Edition 2010); - added the error limit for difference between DC resistance of each phase or each branch caused by other than different lead lengths when stator winding is in cold state as well as the tolerance between measured voltage value and rated voltage of generator (see 5.9 of this Edition, 5.17 of Edition 2010); - added the temperature rise limit of bearing (see 5.12 of this Edition); - added the waveform distortion rate limit of no-load line voltage when generator rotates at the rated speed (see 5.15 of this Edition); - added the requirements for starting resistance torque (see 5.16 of this Edition); - added the requirements that generator permanent magnet temperature resistance is adapted to the corresponding thermal grading (see 5.17 of this Edition, 5.9 of Edition 2010); - modified the winding insulation voltage resistance value after 40°C alternating heat and humidity test (see 5.18 of this Edition, 5.14 of Edition 2010); - deleted the standard XB/T 903 for permanent magnet surface plating (see 5.20 of this Edition, 5.20 of Edition 2010); - added the content related to air gap check in assembly check (see 7.3 of this Edition); - deleted the test item of “determination of inherent voltage regulation rate” [see 7.5c] of Edition 2010]; - modified the test item from “determination of efficiency” to “determination of efficiency curve” [see 7.5f] of this Edition, 7.5e] of Edition 2010]; - added “only if there is such a requirement in the contract” after the test item of “determination of power characteristic curve” [see 7.5m] of this Edition, 7.5g] of Edition 2010]; - deleted “rated frequency” from nameplate items; added “number of pole pairs” (see 8.2 of this Edition); - modified Table 1 header and outlet marks (see 8.3 of this Edition); - modified the provisions that the storage location of the product is limited to the warehouse only (see 8.6 of this Edition); - added the requirements for environmental protection and safety (see 8.9, 8.10 of this Edition); - deleted that “the manufacturer shall repair or replace parts or generator for the user without charge” (see 8.11 of this Edition, 8.9 of Edition 2010). This Part was proposed by China Machinery Industry Federation. This Part shall be under the jurisdiction of National Technical Committee on Wind Machinery of Standardization Administration of China (SAC/TC 50). The drafting organizations of this Part. Xiangtan Electric Manufacturing Corporation Ltd., Xiangdian Wind Energy Co., Ltd., Xi'an Dunan Electric Co., Ltd., Xiangtan Traction Electrical Equipment Research Institute Co., Ltd., National Industrial and Mining Electric Drive Vehicle Quality Supervision and Inspection Center (Hunan), Zhongche Yongji Motor Co., Ltd., Xinjiang Goldwind Technology Co., Ltd., Guodian United Power Technology Co., Ltd., Tsinghua University, National Engineering Research Center for Rare Earth Permanent Magnet Motors, Shenyang University of Technology, International Copper Association (China). Main drafters of this Part. Yang Guowei, Wang Buyao, Liang Xiaobo, Li Suping, Wang Xiaopeng, Li Chunlin, Guo Dengta, Long Xin, Kong Xiangli, Zhu Guanghui, Su Bangwei, Mi Xingshe, Xie Shengqing, Yu Bing, Chai Jianyun, Tang Renyuan, An Zhongliang, Wang Dagang. Version of standard substituted by this Part is. - GB/T 25389.1-2010. Wind turbines - Permanent magnet synchronous generator - Part 1. Technical conditions1 ScopeThis Part of GB/T 25389 specifies the requirements for main types, technical requirements, test methods, inspection rules, marks and packaging, use period of permanent magnet synchronous generator that is used for wind turbines, and that is connected to the grid via converter. This Part is applicable to the permanent magnet synchronous generator (hereinafter referred to as “the generator”). Other types of generators can refer to this Part for use.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 191, Packaging and storage marks GB/T 755, Rotating electrical machines - Rating and performance GB/T 997, Classification of types of construction and mounting arrangements for rotating electrical machines (IM Code) GB/T 1993, Cooling methods for rotating electrical machines GB/T 2900.25, Electrotechnical terminology - Rotating electrical machines GB/T 4831, Specification for model of rotating electrical motor GB/T 4942.1, Degrees of Protection Provided by the Integral Design of Rotating Electrical Machined (IP Code) - Classification GB/T 10068, Mechanical vibration of certain machines with shaft heights 56 mm and higher-measurement evaluation and limits of vibration severity GB/T 10069.1, Measurement of airborne noise emitted by rotating electrical machines and the noise limits Part 1. Method for the measurement of airborne noise emitted by rotating electrical machines GB/T 10069.3, Measurement of airborne noise emitted by rotating electrical machines and the noise limits - Part 3. Noise limits GB/T 12665, Requirements of damp-heat testing of electrical machine for service in general environmental condition GB/T 22714, Test specifications of interturn insulation of form-wound winding for AC low-voltage electrical machines GB/T 22715, Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines GB/T 22719.1, Interturn insulation of random-wound winding for AC low- voltage electrical machines - Part 1. Test methods GB/T 22719.2, Interturn insulation of random-wound winding for AC low- voltage electrical machines - Part 2. Test limits GB/T 25389.2, Wind turbines - Permanent magnet synchronous generator - Part 2. Testing methods3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 2900.25 as well as the followings apply. 3.1 irreversible magnetizing loss the difference part that the magnetic properties of permanent magnet cannot be restored to its original values after external conditions are restored; it generally refers to residual magnetism or flux loss 3.2 efficiency curve the relationship between the output power and the efficiency of the generator at different operating points on the speed-power curve of the generator set 3.3 power characteristic the expression of generator power generation capacity; the power characteristic curve is the relationship between the generator at different speeds and the maximum output power at that speed4 Model, type, basic requirements4.1 The generator model, according to GB/T 4831, is composed of product code, specification code, supplementary code, successively. Model preparation method. 4.2 The generator is usually manufactured according to the rated voltage required by the generator set. The voltage levels are recommended as follows. 400V, 690V, 720V, 960V, 1050V, 1140V, 1250V, 3150V, 3300V, 4160V, 6300V, 10500V. 4.3 Stator winding wiring is generally star-shape. The number of outlet joints is usually 3N (N is 1, 2, 3...). On the outlet terminal, the time phase sequence of the stator winding is determined sequentially according to the direction of rotation of the generator, marked as U, V, W...It may use three-phase or multi- phase winding output terminal. 4.4 The generator generally uses insulation level of 155 (F) and above. 4.5 The quota of the generator is a continuous quota based on the continuous working system (S1). 4.6 The structure and installation type of the generator shall comply with the provisions of GB/T 997. 4.7 The protection level of the generator casing shall meet the requirements of the wind turbine and meet the requirements of GB/T 4942.1. 4.8 The generator shall have a reliable cooling method and meet the requirements of GB/T 1993. The cooling medium used shall not cause damage to the generator. 4.9 The generator can use sliding bearing or rolling bearing. Measures such as bearing insulation can be used as needed.5 Technical requirements5.1 The generator shall comply with the requirements of this Part. It shall be Supplementary code refers to model code, represented by number or letter. Specification code refers to nominal power (kW), the rated power of wind turbines. Product code refers to permanent magnet synchronous generator. manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.2 The generator shall be able to operate normally under the following environmental conditions. a) the altitude does not exceed 2000m; b) the ambient air temperature is not higher than 40°C, not lower than -20°C; is not lower than -40°C for cold regions (when the user explicitly requests low temperature environment); c) the relative humidity of the monthly average maximum air of the wettest month is not greater than 95%; at the same time, the average monthly minimum temperature of this month is not higher than 25°C. 5.3 The insulation resistance limits are as follows. a) The insulation resistance of the stator winding of the generator shall not be lower than UN/(1000+PN/100) MΩ after thermal state or thermal test. NOTE. UN - rated voltage in volts (V); PN - rated power in kilowatts (kW). b) at +5°C~+35°C, when the insulation resistance of the embedded temperature detecting component is measured by a 250V megohmmeter, the insulation resistance shall be not less than 1MΩ. c) the insulation resistance of the moisture-proof heater shall be not less than 1MΩ when measured with the corresponding level of megohmmeter. 5.4 The stator winding of the generator shall be able to withstand the inter-turn voltage resistance test without breakdown. When the generator adopts the formed winding, the peak value of the test impact voltage and the test method are according to GB/T 22714 or GB/T 22715. When the generator adopts the loose winding, the test method and the peak value of the test impulse voltage are in accordance with GB/T 22719.1 and GB/T 22719.2. 5.5 The output of the generator is usually connected to the converter. The insulation structure of the generator shall match the converter. Between each phase of stator winding of the generator as well as between the multi-system windings, it shall be able to withstand 1min voltage resistance test without breakdown. The test voltage is the power frequency voltage and is as sinusoidal as possible. The effective value of the voltage is specified as (2U+1000) V. NOTE. U - the peak value of the AC line voltage on the motor side of the converter, in volts (V). The same generator shall not be repeated for this test. If the user requests, it is allowed to conduct another test on site before starting the operation after installation. The test voltage shall be in accordance with the provisions of GB/T 755. 5.6 When the generator is used for no-load operation of the generator, the vibration amplitude measured according to GB/T 10068 shall be no more than 0.05mm or the vibration speed shall be no more than 2.3 mm/s. The measurement method of vibration strength and the vibration strength limits shall be in accordance with GB/T 10068. And the vibration is measured after the over-speed test. 5.7 When the generator is used for no-load operation of the generator, the noise value measured according to GB/T 10069.1 shall comply with the provisions of GB/T 10069.3. The noise limit of the generator whose speed is lower than 300 r/min does not exceed 85 dB (sound pressure level) (only the generator is evaluated). 5.8 The generator is not allowed to reverse the power supply brake or reverse during operation. When the alphabetical order of the outlet marks is the same as the phase sequence of the three-phase voltage, viewed from the driving end, the generator shall be rotated clockwise (when the user requests the generator to rotate differently, it shall be indicated in the contract); the direction of rotation shall be marked on the generator. 5.9 When stator winding is in cold state, the difference between DC resistance of each phase or each branch caused by other than different lead lengths shall not exceed 1.5% of its minimum value. When the generator is in the no-load cold state, the deviation of any one of the three-phase voltages from the average value of the three-phase shall not exceed 10% of the average value of the three phases. The tolerance between measured voltage value and rated voltage of the generator is ±10%. 5.10 Under the rated speed and rated power factor, the generator shall be able to output the rated power when the voltage changes between 95%~105% of the rated value, and the generator temperature rise limit remains unchanged. 5.11 The generator shall be able to withstand 1.2 times the maximum operating speed, and no harmful deformation shall occur for 2min. 5.12 When the altitude and ambient air temperature meet the requirements of 5.2, the temperature rise limit of the generator winding shall be in accordance with GB/T 755. If the altitude of the test site or the ambient air temperature is different from the provisions of 5.2, the temperature rise limit of the winding shall be corrected in accordance with GB/T 755. The allowable temperature of the bearing (buried thermometer method) shall not be higher than the following values. a) 95°C for rolling bearing; b) 80°C for sliding bearing. 5.13 The efficiency curve of the generator shall meet the user requirements. The calculation of generator efficiency shall include the following losses. a) copper loss; b) iron loss; c) mechanical loss; d) spurious loss. 5.14 After the rated thermal test, the generator shall maintain at the rated voltage and shall be able to withstand 1.15 times the rated load for 1h. At this time, the temperature rise is not evaluated, but the generator shall not be damaged or harmfully deformed. 5.15 When the generator is rotating at the rated speed, the waveform distortion rate limit of no-load line voltage shall not exceed 5%. 5.16 The starting resistance torque is generally not more than 2% of the rated torque (user can negotiate with the manufacturer if necessary). 5.17 The temperature resistance of the generator permanent magnet shall be adapted to the corresponding thermal grading. Irreversible magnetizing loss greater than 1% shall not occur under sudden short-circuit conditions and temperature limits of the generator. 5.18 After the stator winding of the generator is tested for 6 cycles according to the test method of 40°C alternating damp heat specified in GB/T 12665, the insulation resistance shall not be lower than the specified value of 5.3. And the winding insulation voltage resistance shall be able to withstand 85% of the test voltage specified in 5.5, lasting 1min without breakdown. 5.19 There shall be a grounding terminal in the junction box of the generator. At the same time, a grounding terminal shall be provided on the base. Grounding mark shall be set near the grounding terminal. This mark shall be guaranteed as hard to wear out during the entire life of the generator. 5.20 The permanent magnet materials for the generator shall have reliable corrosion protection. 5.21 The generator design life is not less than 20 years.6 Test methodsThe generator shall be tested according to the provisions of GB/T 25389.2.7 Inspection rules7.1 Each generator shall pass the inspection before it can be delivered, and shall be accompanied by a product inspection certificate. 7.2 Exit-factory test items include. a) mechanical check (see 7.3 for requirements); b) determination of insulation resistance of stator winding to casing as well as determination of insulation resistance between windings (the cold insulation resistance can be measured during the test, but the insulation resistance in the hot state shall not be lower than the value specified in 5.3); c) inter-turn voltage resistance test (see 5.4 for requirements); d) voltage resistance test (see 5.5 for requirements); e) vibration measurement (see 5.6 for requirements); f) phase sequence check (see 5.8 for requirements); g) no-load test (see 5.8, 5.9, 5.15 for requirements); h) determination of DC resistance of stator windings in actual cold state (see 5.9 for requirements). 7.3 Mechanical check items include. a) Assembly check. check whether the generator assembly is complete and correct, including checks of poles, rotors, stators, air gaps, bearings, general assembly, and other important components; b) Rotation check. when the generator rotates, it shall be smooth and light, without stagnation; c) Appearance check. the paint on the surface of the generator shall be dry, complete and uniform, free of fouling, collision, cracks, etc.; d) Installation size, outline dimension check. outline and installation size shall comply with relevant regulations. 7.4 Type inspection shall be performed in one of the following situations. a) the first trial or small batch of trials of manufacturer; b) changes in design or technique which may cause changes on some characteristic and parameters; c) unallowable deviation between test results and previous type test results; d) regular sampling of batch-produced generators; the sampling test time is at least one in three years, at least two at a time; if the generator fails in the test, it shall make sampling double the number of unqualified items from the same batch of products to re-test; if there is still unqualified product, it shall test this item piece by piece. 7.5 Type test items of the generator. a) all items of exit-factory test; b) noise measurement (see 5.7 for requirements); c) overload test (see 5.10 for requirements); d) over-speed test (see 5.11 for requirements); e) thermal test (see 5.12 for requirements); f) efficiency determination (see 5.13 for requirements); g) determination of starting resistance torque (see 5.16 for requirements); h) three-phase sudden short-circuit test (only if there is such a requirement in the contract); i) damp heat test (see 5.18 for requirements, only if there is such a requirement in the contract); j) salt spray test (only if there is such a requirement in the contract); k) mold test (only if there is such a requirement in the contract); l) casing protection level test (see 4.7 for requirements, only if there is such a requirement in the contract); m) determination of generator power characteristic (only if there is such a requirement in the contract); n) mass determination (only if trial or necessary).8 Marks, packaging, environmental protection, safetyand use 8.1 The nameplate material and the data marking method on the nameplate shall be guaranteed as hard to eradicate throughout the period of use. 8.2 The nameplate shall be fixed on the generator (actual line of sight) and shall be marked as follows. a) name of manufacturer; b) generator name; c) generator model; d) number of phases of generator; e) rated power (actual output power of the generator, kW); f) rated voltage (V); g) rated current (A); h) number of pole pairs; i) power factor; j) rated rotation speed (r/min); k) insulation level; l) wiring method; m) casing protective level; n) cooling method; o) year and month of production, number; p) mass (kg). 8.3 There shall be corresponding marks on the outlet end of the generator stator winding and the wiring position of the terminal block. And to ensure that its writing is not easy to wear out during the entire life of the generator. Its marks refer to the example in Table 1. Table 1 -- Outlet marks Three outlet marks (three-phase winding) 3N of outlet marks (multiphase winding) U 1U ... NU V 1V ... NV W 1W ... NW 8.4 The generator's maintenance instructions and product certification certificate shall be supplied with each generator to user. The maintenance instructions shall state that the product has strong magnetic properties and may have an impact on the human body and the environment. 8.5 The packaging of the generator shall be able to ensure that under normal storage and transport conditions, it shall not cause moisture and damage due to poor packaging within one year from the date of shipment. 8.6 The packaging of the generator shall not be affected by rain during transport and storage, and shall not be subject to harmful collision. The product shall be stored in an environment where there is no rain, no snow, no harmful gas, no dust, with air circulation, where the relative humidity of the air is not more than 80%, and the ambient temperature is -20°C~+40°C. 8.7 The text and mark on the outer wall of the packaging shall be clear and tidy, as follows. a) freight station and manufacturer name; b) receiving station and receiver name; c) generator model and product number; d) generator mass and overall mass; e) package size; f) the words such as "no tumbling", "fear of rain", "upward", "strong magnetic in the motor", "no collision" shall be marked at an appropriate position outside the package; the graphics shall comply with the provisions of GB/T 191; g) package lifting method and position. 8.8 Each generator shall be accompanied by the following random documents. The documents shall be placed in a moisture-proof bag and secured inside the package. a) random file directory; b) use maintenance instructions; c) product certificate; d) generator winding and temperature measuring device wiring diagram; e) other documents requested by the user (shall be indicated in the contract). 8.9 The generator shall not pollute the environment during transport, storage and operation. After the end of the service life, equipment such as copper wire is recycled or harmlessly treated. 8.10 The generator and its accessories shall not support combustion, shall not explode and release harmful gases during use. When used, it shall not be harmful to the environment, other equipment, especially to the human body. 8.11 In the case where the user correctly uses and stores the generator in accordance with the instructions in the instruction manual, the manufacturer shall ensure that the generator is in good operation within one year of use, but not more than two years from the date of manufacture by the manufacturer (specific age may be additionally indicated in the contract). ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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