GB/T 25387.1-2021 English PDF (GBT25387.1-2021)

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GB/T 25387.1-2021: Wind turbines generator system -- Full-power converter -- Part 1: Technical condition
GB/T 25387.1-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 11
Replacing GB/T 25387.1-2010
Wind Turbines Generator System - Full-power Converter -
Part 1: Technical Condition
ISSUED ON: MARCH 9, 2021
IMPLEMENTED ON: OCTOBER 1, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 7
2 Normative References ... 7
3 Terms and Definitions ... 8
4 General Requirements ... 12
4.1 Requirements for Conditions of Use ... 12
4.2 Cabinets and Components ... 14
4.3 Performance Indicators ... 15
4.4 Fault Protection ... 17
4.5 Safety Requirements ... 21
4.6 Electromagnetic Compatibility ... 23
4.7 Operation and Maintenance ... 24
4.8 Communication and Monitoring ... 25
4.9 Requirements for Grounding Safety ... 25
4.10 Requirements for Thermal Protection ... 26
4.11 Lightning Protection ... 27
4.12 Protective Performance ... 27
4.13 Requirements for Vibration Test ... 27
4.14 Requirements for High-temperature Test ... 27
4.15 Requirements for Low-temperature Test ... 27
4.16 Constant Damp Heat Test Requirements ... 28
4.17 Alternating Damp Heat Test Requirements ... 28
5 Test Methods ... 28
6 Inspection Rules ... 28
6.1 Type Test ... 28
6.2 Exit-factory Test ... 29
6.3 Test Items ... 29
7 Marking, Packaging, Storage and Transportation ... 30
7.1 Marking ... 30
7.2 Packaging ... 31
7.3 Storage ... 31
7.4 Transportation ... 32
Appendix A (informative) Topological Structures of Commonly Used Full-power AC-
DC-AC Voltage-type Converter ... 33
Wind Turbines Generator System - Full-power Converter -
Part 1: Technical Condition
1 Scope
This Part of GB/T 25387 specifies the terms and definitions, general requirements, inspection
rules and product-related information of full-power AC-DC-AC voltage-type converters for
wind turbines generator system.
This Part is applicable to the full-power AC-DC-AC voltage-type converters for wind turbines
generator system (hereinafter referred to as “the converters”).
2 Normative References
The following documents are indispensable to the application of this document. In terms of
references with a specified date, only versions with a specified date are applicable to this
document. In terms of references without a specified date, the latest version (including all the
modifications) is applicable to this document.
GB/T 191 Packaging - Pictorial Markings for Handling of Goods
GB/T 2423.56 Environmental Testing - Part 2: Test Methods - Test Fh: Vibration, Broadband
Random and Guidance
GB/T 2900.53 Electrotechnical Terminology - Wind Turbine Generator Systems
GB/T 3797 Electrical Control Assemblies
GB/T 3859.1 Semiconductor Converters - General Requirements and Line Commutated
Converters - Part 1-1: Specification of Basic Requirements
GB/T 3859.2-2013 Semiconductor Converters- General Requirements and Line Commutated
Converters - Part 1-2: Application Guide
GB/T 4208-2017 Degrees of Protection Provided by Enclosure (IP code)
GB/T 4798.1 Classification of Environmental Conditions - Classification of Groups of
Environmental Parameters and Their Severities - Part 1: Storage
GB/T 4798.2 Environmental Conditions Existing in the Application of Electric and Electronic
Products - Part 2: Transportation
GB/T 4798.3 Environmental Conditions Existing in the Application of Electric and Electronic
Products - Part 3: Stationary Use at Weather-protected Locations
A conversion unit that converts the AC electricity of the voltage, current amplitude and
frequency change output by the wind turbines into DC electricity.
3.2 grid-side converter
A conversion unit that converts the DC electricity output by the generator-side converter into
AC electricity that satisfies the requirements of the power grid, and feeds back to the power
grid.
3.3 DC link
A DC unit connected to each other between the generator-side converter and the grid-side
converter.
3.4 full-power converter
A conversion system composed of generator-side converter, grid-side converter and DC link,
and undertakes all energy conversion of the adapted wind turbines.
NOTE: see Appendix A.
3.5 rated power of grid-side converter
The net on-grid rated active power of the adapted wind turbine of the grid-side converter.
3.6 rated power of generator-side converter
The rated active power of the adapted wind turbine of the generator-side converter.
3.7 grid-side power factor
The ratio of the active power output by the grid-side converter to the apparent power.
3.8 grid-side rated frequency
The nominal fundamental wave frequency of the grid voltage adapted to the grid-side converter.
3.9 grid-side frequency range
The gird voltage fundamental wave frequency variation interval that can be adapted to grid-
side converter.
3.10 grid-side rated voltage
The root mean square value of the fundamental wave of the conductor line voltage between the
low-voltage side of the boosting transformer adapted to the wind turbine and the grid-side
converter.
3.11 grid-side operating voltage range
NOTE: when the voltage change in a short period of time exceeds the above-mentioned specified
value, it may cause operation interruption or trip. If continuous operation is required, the
user shall negotiate with the manufacturer.
4.1.2.4 Grid voltage unbalance
When the grid voltage unbalance is not greater than 4%, the converter shall be able to normally
connect to the grid and operate; when the grid voltage unbalance is greater than 4% and less
than 8%, the converter can maintain grid-connected operation.
4.1.2.5 Grid voltage fluctuations
When the difference in the extreme value of the grid voltage fluctuation range does not exceed
1.25% of the rated voltage within one hour, the converter shall be able to normally operate.
4.1.2.6 Total harmonic distortion (THDu) of voltage
The waveform of the grid voltage shall be a sine wave. Under steady-state conditions, when the
total harmonic distortion of voltage is less than 5%, the converter shall be able to operate
normally. Each order of harmonic of the grid voltage shall satisfy the requirements of GB/T
14549.
4.2 Cabinets and Components
4.2.1 Cabinet design requirements
The cabinet design shall satisfy the following requirements:
a) The construction standards for the converter cabinets shall comply with the relevant
stipulations of GB/T 20641;
b) The design of the converter cabinets shall satisfy the installation and maintenance
requirements of the tower and the cabin. When needed, there shall be corresponding
vibration reduction measures;
c) The design of the converter cabinets shall satisfy the requirements of safe grounding;
d) There shall be no scratching or deformation of the converter enclosure, appearance
and surface, and shall comply with the stipulations of GB/T 3797.
4.2.2 Component requirements
The components shall satisfy the following requirements:
a) The components used in the converter shall comply with their own relevant standards
and the relevant stipulations of GB/T 5226.1;
b) Anti-corrosion measures shall be taken into consideration for the metal parts of the
product. All parts shall be intact, and the appearance of the product shall be free of
scratches, damages and deformations;
c) Product parts and components shall be correctly and firmly installed,...