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GB/T 25389 consists of two parts under the general title Wind turbines - Permanent magnet synchronous generator:
——Part 1: Technical conditions;
——Part 2: Testing methods.
This is Part 1 of GB/T 25389.
This part is developed 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.
The following main technical changes have been made with respect to GB/T 25389.1-2010:
——In the standard name, "low-speed permanent magnet synchronous generator" is changed to "permanent magnet synchronous generator";
——Three terms, i.e. “low-speed”, “double three-phase” and “six-phase”, are deleted (see 3.1, 3.2 and 3.3 of Edition 2010);
——The definitions of “efficiency curve” and “power characteristic” are updated (see 3.2 and 3.3; 3.5 and 3.6 of Edition 2010);
——The generator model is changed from “TFYD” to “TFY” (see 4.1);
——The requirements for nominal power are deleted (see 4.2 of Edition 2010);
——Voltages of 400V, 720V, 960V, 1,140V, 1,250V, 3,300V and 4,160V are added (see 4.2; 4.3 of Edition 2010);
——The wiring mode of stator winding, the number of joints, the time phase sequence, the terminal marking, etc. are stipulated; "three-phase or double three-phase or six-phase AC output" is changed to "output terminals of three-phase or multi-phase windings may be adopted" (see 4.3; 4.4 of Edition 2010);
——The provision that “the maximum operating speed of generators shall not exceed 500r/min” is deleted (see 4.6 of Edition 2010);
——The requirements for the rotation direction of generators are added (see 5.8);
——The requirements for generator bearings are added (see 4.9);
——The altitude and ambient temperature in cold areas are modified (see 5.2);
——The selection range of the grade of trameggers for measuring the insulation resistance of moisture-proof heaters is modified [see 5.3c); 5.11c) of Edition 2010];
——The temperature rise limit for generators deviating from rated operation is deleted (see 5.4 of Edition 2010);
——The impulse voltage peak and testing method for the interturn withstand voltage test of stator windings shall be carried out according to the current standard (see 5.4; 5.13 of Edition 2010);
——The generator insulation structure is required to be matched with the converter; the voltage withstand test value between phases of the stator winding and between multi-system windings are modified (see 5.5; 5.12 of Edition 2010);
——The vibration speed limit and the requirement for vibration measurement after overspeed test are added (see 5.6);
——The matching requirements for the converter at the output terminal of generators with the insulation structure and the voltage regulation are modified (see 5.5; 5.6 of Edition 2010);
——The requirement for generators to withstand 1.5 times of rated current is deleted (see 5.7 of Edition 2010);
——The noise limit of generators with speed less than 300r/min are added (see 5.7; 5.16 of Edition 2010);
——The limit of difference in the DC resistance of cold-state stator winding at different phases or branches after excluding the error caused by the different length of lead wire and the tolerance between the measured generator voltage and the rated voltage are added (see 5.9; 5.17 of Edition 2010);
——The temperature rise limit of bearings is added (see 5.12);
——The limit of waveform distortion factor of no-load line voltage when the generator is at rated speed is added (see 5.15);
——The requirement for starting resistance moment is added (see 5.16);
——The requirement that the temperature resistance of the generator's permanent magnet shall be adapted to the corresponding thermal classification is added (see 5.17; 5.9 of Edition 2010);
——The insulation withstand voltage value of windings after 40℃ cyclic damp heat test is modified (see 5.18; 5.14 of Edition 2010);
——XB/T 903 implemented by the electroplated layer on the permanent magnet is deleted (see 5.20; 5.20 of Edition 2010);
——The contents of air gap inspection are added in assembly inspection (see 7.3);
——The “determination of inherent voltage regulation” is deleted [(see 7.5c) of Edition 2010];
——The test item “determination of efficiency” is changed to “determination of efficiency curve” [see 7.5f); 7.5e) of Edition 2010];
——“only when this is required in the contract” is added after the “determination of power characteristic curve” [see 7.5m); 7.5g) of Edition 2010];
——The “rated frequency” is deleted from the nameplate on which “number of pole pairs” is added (see 8.2);
——The header of Table 1 and marks on outlet terminal are modified (see 8.3);
——The provision that the storage place of products is limited to warehouses is modified (see 8.6);
——The environment protection and security requirements are added (see 8.9 and 8.10);
——The commercial content that "the manufacturer shall repair or replace parts or generators for users free of charge" is deleted (see 8.11; 8.9 of Edition 2010).
This part was proposed by China Machinery Industry Federation.
This part is under the jurisdiction of SAC/TC 50 National Technical Committee on Wind Power Machinery of Standardization Administration of China.
Drafting organizations of this part: Xiangtan Electric Manufacturing Co., Ltd., XEMC Windpower Co. Ltd., Xi'an DunAn Electric Co., Ltd., Xiangtan Traction Electrical Equipment Research Institute Co., Ltd., National Quality Supervision and Inspection Center for Industrial and Mining Electric Drive Vehicles (Hunan), CRRC Yongji Electric Co., Ltd., Xinjiang Goldwind Sci & Tech Co., Ltd., Guodian United Power Technology Company Limited, Tsinghua University, National Rare Earth Permanent Magnet Motor Engineering Technology Research Center, Shenyang University of Technology, and International Copper Association Ltd., China.
Chief 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, and Wang Dagang.
The previous edition of this part is as follows:
——GB/T 25389.1-2010.
Wind turbines - Permanent magnet synchronous generator - Part 1: Technical conditions - Part 1: Technical conditions
1 Scope
This part of GB/T 25389 specifies the main types, technical requirements, testing methods, inspection rules, marking and packaging, service life, etc. of permanent magnet synchronous generators for wind turbines connected to the grid via converters.
This part is applicable to permanent magnet synchronous generators (hereinafter referred to as generators), and may be referred to by other types of generators.
2 Normative references
The 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 - Pictorial marking for handling of goods
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 997 Rotating electrical machines - Classification of types of construction, mounting arrangements and terminal box position (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 machines (IP code) - Classification
GB/T 10068 Mechanical vibration of certain machines with shaft heights 56mm and higher - Measurement, evaluation and limits of vibration severity
GB/T 10069.1 Measurement of the 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 methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.25 and the following apply.
3.1
irreversible magnetizing loss
difference in magnetic properties of the permanent magnet failing to restore to the original value after the external conditions are restored. It is generally manifested as residual magnetism or loss of magnetic flux
3.2
efficiency curve
relationship between the output power and the efficiency of generators at different working points on the unit's speed-power curve
3.3
power characteristic
expression of the generating capacity of generators; the power characteristic curve shows the relationship of the generator speeds and the maximum output power at corresponding speeds
4 Model, type and basic requirements
4.1 The generator model consists of product code, specification code and supplementary code successively according to GB/T 4831.
Model preparation method:
4.2 The generator is generally manufactured according to the rated voltage required by the wind turbines, and recommended voltages are as follows:
400V, 690V, 720V, 960V, 1,050V, 1,140V, 1,250V, 3,150V, 3,300V, 4,160V, 6,300V and 10,500V.
4.3 The stator winding connection is of star-shape. There are usually 3N (N is 1, 2, 3, ...) outlet connectors. The time phase sequence of stator winding at the outlet terminal is determined in turn according to the rotation direction of the generator and is marked as U, V, W... The output terminals of three-phase or multi-phase windings may be adopted.
4.4 The insulation grade of the generator is generally 155(F) or above.
4.5 The generator quota is a continuous one based on the continuous duty (S1).
4.6 The structure and installation type of the generator shall comply with those specified in GB/T 997.
4.7 The degree of protection provided by the generator enclosure shall meet the requirements of the wind turbines, and comply with GB/T 4942.1.
4.8 The generator shall be provided with a reliable cooling method, and comply with GB/T 1993. The coolant used shall not damage the generator.
4.9 The sliding bearing or rolling bearing may be used for the generator, and measures such as bearing insulation may be taken as required.
5 Technical requirements
5.1 The generator shall meet the requirements of this part and be manufactured according to the drawings and technical documents approved through established procedures.
5.2 The generator shall be able to operate normally under the following environmental conditions:
a) the altitude does not exceed 2,000m;
b) the ambient air temperature shall be -20℃~40℃, and not lower than -40℃ in cold areas (when the user clearly proposes the requirements for low-temperature environment);
c) the maximum monthly average air relative humidity of the wettest month shall not be greater than 95%, and the minimum monthly average temperature of this month shall not be greater than 25℃.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Model, type and basic requirements
5 Technical requirements
6 Testing methods
7 Inspection rules
8 Marking, packaging, environment protection, security and service life
