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GBZ25427-2010: Wind turbine generator systems -- Lightning protection
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Wind turbine generator systems -- Lightning protection
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GB/Z 25427-2010
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Basic data | Standard ID | GB/Z 25427-2010 (GB/Z25427-2010) | | Description (Translated English) | Wind turbine generator systems -- Lightning protection | | Sector / Industry | National Standard | | Classification of Chinese Standard | F11 | | Classification of International Standard | 27.180 | | Word Count Estimation | 54,573 | | Date of Issue | 2010-11-10 | | Date of Implementation | 2011-01-01 | | Quoted Standard | GB/T 21714.1-2008; GB/T 21714.2-2008; GB/T 21714.3-2008; GB/T 21714.4-2008 | | Adopted Standard | IEC/TR 61400-24-2002, MOD | | Regulation (derived from) | ?National Standard Approval Announcement 2010 No.8 (Total No.163) | | Issuing agency(ies) | Ministry of Health of the People's Republic of China | | Summary | This standard specifies the wind turbine lightning damage statistics, risk of lightning damage to wind turbine assessments, blade, bearing, gear boxes and lightning protection and grounding requirements and personnel safety of electrical and control systems. | GBZ25427-2010: Wind turbine generator systems -- Lightning protection---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Wind turbine generator systems.Lightning protection
ICS 27.180
F11
People's Republic of China national standardization of technical guidance documents
Wind turbine lightning protection
(IEC TR61400-24.2002, Windturbine generatorsratorsystems-
Part 24. Lightningprotection, MOD)
2010-11-10 released
2011-01-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword Ⅲ
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 lightning and wind turbine 4
5 damage statistics 10
6 Risk Assessment of Damage to Wind Turbines by Lightning 17
Wind turbine blade lightning protection 22
8 Bearing and gearbox protection 28
Protection of electrical and control systems 30
10 Ground 40
11 staff safety 42
12 Conclusions and recommendations for future work 43
Appendix A (Informative) Typical Lightning Damage Questionnaire 45
References 47
Foreword
GB /Z 25427 Guidance Technical Documentation Amendments to IEC TR61400-24.2002 "Wind Turbines Part 24. Lightning
Protection "(English version).
This guidance document has been drafted in accordance with IEC TR61400-24.2002.
The guidance of technical documents is divided into 11 chapters an informative appendix.
Compared with IEC TR61400-24.2002, this Guidance Document has the following amendments.
--- The guidance of technical documents according to the provisions of GB/T 1.1, modify the scope of IEC TR61400-24.2002;
--- Added Chapter 2 normative references, some of the documents in the reference document is normative references, the other chapter serial number
Postponed
--- The guidance of technical documents to delete the IEC 61024 series and IEC 61312 series of standards name and part of the standard
Already by IEC /TC81 (Lightning Protection Standardization Technical Committee) to be replaced by IEC 62305 series of standards, the guidance
Technical documents related to IEC standards when the lightning protection by the current standard IEC 62305 equivalent into the national standard
GB/T 21714 series of alternative;
--- Remove the original file 3.6.
--- Deleted the original document part of the table (as shown in Table 4), added some new tables as Table 8, modified part of the table symbols.
The part modified according to the requirements of GB/T 20000.2 is marked with a vertical single line on the outside of the items covered by these differences.
The following editorial changes have been made to IEC TR61400-24 for ease of use of this guidance document.
a) The foreword of IEC TR61400-24.2002 has been deleted, the introduction of IEC TR61400-24.2002 has been revised.
b) Replace "This Technical Report" with "This Guidance Technical Paper";
c) Use the decimal "." instead of the comma "," as a decimal point;
d) Added the preface to this guidance document.
This guidance document is proposed by China Machinery Industry Federation.
This guidance document is subject to the National Wind Machinery Standardization Technical Committee (SAC/TC50).
The main drafting of the guidance of technical documents. Machine Productivity Promotion Center, Chengdu Industrial Ryan Electronics Co., Ltd., Sichuan Zhongguanggao
Branch Industry Development Group, Beijing Europe and the Security Technology Co., Ltd.
The main drafters of this technical guidance document. Zhang Ping, Qiu Chuanrui, Liu Shouxian, Tong Jianxun.
Introduction
In recent years, damage to wind turbines (wind turbine generators) due to lightning strikes has been recognized as a growing problem. Wind power
The increase in the number of generator sets installed and the increase in installation height make them more damaging to lightning than expected repair costs.
The impact of lightning disasters on operational reliability is due to the increase of generating capacity of a single wind turbine and offshore construction of wind turbines
From the people's attention. In particular, when several large wind turbines are operating at the same time in the wind farm, any lightning strike on these large winds
Potential losses caused by the generator are unacceptable.
People can be targeted along the overhead lines, substations and power plants and other facilities installed above the protective conductor. But the wind turbine
Different, due to the physical size of the wind turbine and the natural environment in which they are facing different lightning protection issues. Typical wind turbine
Group has 2 to 3 leaves, diameter up to 100m, leaf height above the ground when the rotation of more than 100m. In addition, large-scale use of wind turbines absolutely
Edge composite materials, such as fiberglass reinforced plastic as a carrier. Lightning protection system must be combined with the different parts of the wind turbine
As a whole, to ensure that various parts of the wind turbine may become a lightning strike point, they can safely withstand the impact of lightning and lightning current
Conducted safely from the lightning strike point to the earth without unacceptable damage to the wind turbine without interfering with the operation of the systems.
This Guidance Document is intended for the design of wind turbine generator, purchaser, operator, certification body and installation department
For the latest wind turbine lightning protection technology.
Wind turbine lightning protection
1 Scope
This Guidance Document sets out the statistics of the lightning damage to the wind turbine and the risk of the lightning damage to the wind turbine.
Estimation, blades, bearings, gearbox and lightning protection and electrical and control systems and grounding requirements and personnel safety.
This guideline is applicable to the lightning protection of horizontal axis wind turbines whose windward sweep area is greater than or equal to.200m2 and other
The type of wind turbine can also refer to the use.
2 Normative references
The following documents contain provisions which, through reference in this Guidance Document, become the provisions of this Guidance Note document. All dated
Reference documents, all subsequent amendments (not including errata content), or revisions do not apply to this guidance document, however, drums
Recipients of the agreement based on this guidance document are encouraged to study whether the latest versions of these documents are applicable. All undated references
The latest version of this document applies to this guidance document.
GB/T 21714.1-2008 lightning protection Part 1. General (IEC 62305-1.2006, IDT)
GB/T 21714.2-2008 lightning protection Part 2. Risk Management (IEC 62305-2.2006, IDT)
GB/T 21714.3-2008 lightning protection Part 3. Physical damage to buildings and life-threatening (IEC 62305-3.2006,
IDT)
GB/T 21714.4-2008 lightning protection Part 4. Electrical and electronic systems within the building (IEC 62305-4.2006, IDT)
3 Terms and definitions
The following terms and definitions apply to this guidance document.
3.1
Acceptable number of lightning strikes (Nc) acceptedlightningflashfrequency (Nc)
Acceptable annual average number of lightning strikes that can cause damage to the building.
3.2
Pick and place system airterminationsystem
Part of the external LPS intercepting Thunderbolt.
3.3
Bonding conductor bondingconductor
Connect the conductors of each separate part of the equipment so that the potential between them is equal.
3.4
Lap busbar
Bus. Metal parts, power and communications cables and other cables through which LPS can be connected.
3.5
Dangerous discharge dangeroussparking
Undesirable discharge phenomena caused by lightning current on the protected buildings.
3.6
Straight lightning strike on the building (Nd) directlightningflashfrequencytoastructure (Nd)
Average number of lightning strikes per year expected on average in buildings.
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