GB/T 19071.1-2018 (GBT 19071.1-2018)

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GB/T 19071.1-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 11
Replacing GB/T 19071.1-2003
Wind turbines - Asynchronous generator -
Part 1. Technical conditions
ISSUED ON. MAY 14, 2018
IMPLEMENTED ON. DECEMBER 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Types, basic parameters and dimensions ... 7
4 Technical requirements ... 10
5 Test method ... 12
6 Inspection rules ... 12
7 Marking, packaging, transportation and storage ... 14
8 Environmental protection and safety requirements ... 16
9 Warranty period ... 17
Foreword
GB/T 19071, Wind turbines – Asynchronous generator, comprises two parts.
-- Part 1. Technical conditions;
-- Part 2. Test method.
This Part is Part 1 of GB/T 19071.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 19071.1-2003, Wind turbines – Asynchronous generator –
Part 1. Technical conditions. Compared with GB/T 19071.1-2003, the major changes
of this Part are as follows.
-- it changes the applicable scope of the standard (see Clause 1);
-- it adds the normative references GB/T 1971, GB/T 1032, GB/T 10069.3 and GB/T
20626.1 (see Clause 2) ;
-- it adds the rated power specifications of single-speed generators. 50 kW, 100 kW,
800 kW, 1,100 kW, 2,000 kW, 2,500 kW and 3,000 kW (in case of any special
requirement, it can be as agreed on by user and manufacturer) (see 3.5);
-- it deletes the rated voltages of single-speed generators “400 V, 1,000 V and 1,500
V” (see 3.6);
-- it deletes the specifications of two-speed generators’ rated power “660 kW/180
kW and 750 kW/220 kW”; it adds the specifications “660 kW/150 kW, 750 kW/200
kW, 1,300 kW/250 kW” (see 3.7);
-- it adds the synchronous rotational speed of two-speed generators 1,000 r/min/
750 r/min (see 3.8);
-- it deletes the speed differences of single-speed and two-speed generators (see
3.9 of 2003 edition);
-- it adds the diameter specifications and deviations of shaft extension without a
keyway (see Table 1 of 3.9);
-- it changes the tolerances for circle run-out of shaft extension (see 3.10; 3.10.3 of
2003 edition);
-- it adds the installation dimensions of generators of center-height 560 and 630
(see 3.11; 3.10.2 of 2003 edition);
Wind turbines - Asynchronous generator -
Part 1. Technical conditions
1 Scope
This Part of GB/T 19071 specifies the main types, basic parameters and dimensions,
technical requirements, test method, inspection rules, test items, and marking,
packaging, transportation and other requirements for asynchronous generators for
grid-connected, constant-speed wind turbines.
This Part applies to grid-connected, constant-speed single-speed or two-speed
asynchronous generators (hereinafter referred to as “generators”); it can be referred
to for 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 dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to this document.
GB/T 191, Packaging – Pictorial marking for handling of goods
GB/T 755, Rotating electrical machines – Rating and performance
GB/T 997-2008, Rotating electrical machines - Classification of types of
construction, mounting arrangements and terminal box position (IM code)
GB/T 1032, Test procedures for three-phase induction motors
GB/T 1971, Rotating electrical machines – Terminal markings and direction of
rotation
GB/T 4942.1-2006, Degrees of protection provided by the integral design of
rotating electrical machined (IP code) – Classification
GB/T 10068-2008, 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 19071.2, Asynchronous generator for wind turbine generator systems – Part
2. Test method
GB/T 22714, Test specifications for interturn insulation of form-wound winding for
AC low-voltage electrical 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
3 Types, basic parameters and dimensions
3.1 The enclosure protection degree of generators shall not be lower than the
specification of IP 44 of GB/T 4942.1-2006.
3.2 Generators shall have a reliable cooling method. In case of a forced-air cooling
method, it shall be ensured that the air introduced will cause no damage to generators;
in case of a water cooling method, there shall be no water seepage or water leakage.
3.3 The structure and installation type of generators shall meet the specification of
IM B3 of GB/T 997-2008.
3.4 The rating of generators is a continuous rating based on the continuous duty
system (S1).
3.5 It is recommended that single-speed generators are made according to the
following rated powers.
50 kW, 100 kW, 150 kW, 200 kW, 250 kW, 300 kW, 400 kW, 500 kW, 600 kW, 660 kW,
750 kW, 800 kW, 1,000 kW, 1,100 kW , 1,320 kW, 1,500 kW, 2,000 kW, 2,500 kW,
3,000 kW (in case of any special requirement, it can be as agreed on by user and
manufacturer).
3.6 The rated frequency of single-speed generators is 50 Hz; the synchronous
rotational speed is 1,500 r/min; the rated voltage is 690 V (in case of any special
temperature of the test site is different from those specified in 4.2, the temperature rise
limit shall be corrected as specified in GB/T 755. The temperature limit for bearings is
95°C.
4.7 After rated heat test, maintain the rated voltage unchanged and generators shall
be capable of bearing 1.15 times of rated load for 1 h. Then the temperature rise is not
assessed, but generators shall not have damages or harmful deformation.
4.8 Generators shall be capable of bearing 1.2 times of maximum operating
rotational speed (in case of any special requirement, it can be as agreed on by user
and manufacturer), without any harmful deformation within 2 min.
4.9 After heat condition or heat test, the insulation resistance of generators’ stator
windings shall not be lower than UN/1,000 MΩ. When measuring resistance, the
selection of tramegger shall be as specified in GB/T 1032.
NOTE. UN – rated voltage, in V.
4.10 Generators’ stator windings shall be capable of bearing withstand voltage test
for 1 min between all phases and duplex windings, without breakdown. The frequency
of test voltage is 50 Hz, which is of sinusoidal wave if possible. The effective value of
voltage is (2UN + 1,000) V, but not lower than 1,500 V.
This test shall not be repeated on the same generator. If required by user, it is allowed
to conduct one more test on site before commissioning after installation. The test
voltage shall be as specified in GB/T 755.
4.11 Generators’ stator windings shall be capable of bearing inter-turn withstand
voltage test without breakdown. When generators are equipped with random windings,
their test impact voltage peak and test method shall be as specified in GB/T 22719.1
and GB/T 22719.2. When generators are equipped with formed windings, their test
impact voltage peak and test method shall be as specified in GB/T 22714.
4.12 Short-time voltage rising test shall be conducted for generators. Use the no-load
generator method for the test; apply a voltage 130% of the rated voltage; the test
duration is 3 min. The inter-turn insulation shall have no damage. When improving the
voltage value to 130% of the rated voltage, it is allowed to improve the frequency or
rotational speed at the same time, but the rotational speed shall not exceed 115% of
the rated value.
4.13 After test is conducted for 6 cycles for generators’ stator windings using the
40°C alternate damp-heat test method specified in GB/T 12665, the insulation
resistance shall not be lower than the value specified in 4.9 and they shall be capable
of bearing the withstand voltage test specified in 4.10 without breakdown. (Only
applicable to the generators for which user has such a requirement, this requirement
shall be stated in the contract.)
e) rated frequency;
f) rated power;
g) rated rotational speed;
h) rated voltage;
i) power factor;
j) efficiency;
k) grade of insulation;
l) wiring method;
m) manufacturing date and number;
n) mass (kg).
7.1.3 Leading-out terminal signs
The leading-out terminals of generators’ stator windings and the wiring positions of
wiring board shall have corresponding signs, which shall be indelible during the whole
service life. The leading-out terminal signs and rotational direction of generators shall
be as specified in GB/T 1971.
7.2 Accompanying documents
Each generator shall be accompanied by the following documents.
a) list of accompanying documents;
b) user’s manual of product (instructions for use and maintenance);
c) compliance certificate of product;
d) wiring diagram of generators’ windings and temperature measuring elements;
e) other documents required by user (which shall be stated in the contract).
The accompanying documents shall be provided for user along with each generator,
including user’s manual (instructions for use and maintenance) and compliance
certificate of generators. Accompanying documents shall be enclosed in moisture
barrier bags and fixed inside the packaging body.
7.3 Packaging, transportation and storage
7.3.1 The shaft extension flat key of generators shall be tied to the shaft extension;