DL/T 5158-2002 英文版 电力工程气象勘测技术规程

ICS 27.100
P 60
Record No. J180—2002
Electric Power Industry Standard of the People’s Republic of China
P DL / T 5158 — 2002
Technical Code of Meteorological
Surveying for Electrical
Power Projects

Issue Date: April 27, 2002 implementation Date: September 1, 2002
Issued by State Economic and Trade Commission of the People’s Republic of China

1 Scope
This code specifies the contents and technical principles of meteorological surveying for electrical power projects and is applicable to the meteorological surveying for large-scale power generation, transmission and transformation projects that are newly built, expanded and modified as well as the electric power projects of microwave and optical fiber-based communication. Also, it can be used as a reference for meteorological surveying for other electric power projects than those described above.

2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this code. When this code is published, the standards of the indicated editions are all effective and in force. However, all the standards may be revised. The parties that use this code are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 50009—2001 Load Code for the Design of Building Structures
JTJ 213—1998 Code of Hydrology for Sea Harbor
Code for Surface Meteorological Observation, prepared by
China Meteorological Administration in 1979

3 General
3.0.1 The analysis and calculation of metrological conditions must place emphasis on the fundamental data which shall be reviewed in terms of typicality, reliability and consistency.
3.0.2 When calculating the design wind velocity and ice coating thickness of a region where sufficient data is not available, multiple calculation methods shall be employed as practical as possible. The calculation results derived from these methods shall be analyzed comprehensively so as to select reasonable results.
3.0.3 Where the project site is far away from the local meteorological station and the terrain conditions there vary greatly, short-term meteorological observation station, wind measuring station, icing observation station shall be established based on the design requirements so as to obtain the necessary actual data.
3.0.4 Where special meteorological data is needed for air cooling system of thermal power plants and wind farms and cannot be made available from the local meteorological station, special metrological station shall be established at the project site to continuously observe wind velocity, wind direction and ambient temperature.
3.0.5 For electric power projects under construction or those have been completed and put into operation, if catastrophic accidents including unusual strong wind and ice coating of conductors occur,the relevant personnel shall, together with the design personnel of the projects, promptly visit the site for metrological survey, further analyzing and demonstrating the metrological conditions of design and proposing the corresponding engineering measures.

3.0.6 The metrological surveying for electrical power projects shall be carried out based on the experiences gained on an ongoing basis,through aggressive and prudent use of the domestic and foreign proven and state-of-art theories, methods and technologies.