Sichuan Liangfengao Wind Farm Lightning Protection And Grounding Project Case
I.Project Background
Sichuan Yanyuan Liangfeng Au wind farm is located in the plateau area above 3000 metres above sea level,the geomorphological structure of the rocky soil,coupled with strong thunderstorms,resulting in high grounding resistance,equipment is difficult to ground effectively,which is likely to lead to over-voltage rebound problems,resulting in frequent lightning strikes in the wind farm tripping faults.Although routine testing showed that everything was normal,it was impossible to find out where the problem was.In order to solve this problem,we decided to use the flexible grounding electrode lightning protection technology to transform the wind farm.
II.The project needs
The main objective of the lightning protection and grounding renovation project is to improve the lightning protection capability of the wind power equipment,reduce the risk of lightning damage,and ensure the stable power supply of the wind farm through the introduction of flexible grounding electrode lightning protection technology.
III.The introduction of flexible grounding lightning protection technology
Flexible grounding lightning protection technology is a new type of lightning protection method,it has a high conductivity and corrosion resistance of flexible grounding materials,through the optimisation of the grounding system design,to achieve rapid discharge of lightning current,effectively protect wind power equipment from lightning damage.The use of flexible grounding technology can improve the structure of the grounding network,significantly improve the impact resistance of the ground network,fundamentally solve the problem of frequent lightning strikes tripping,and strengthen the operational stability of the wind farm.
IV.The implementation of the programme
1.Design stage:according to the actual situation of the wind farm,combined with the characteristics of flexible grounding lightning protection technology,detailed grounding system design.During the design process,full consideration of terrain,geology,climate and other factors to ensure the effectiveness of the grounding system.
2.Material selection:Selection of new grounding body materials composed of non-metallic conductive materials,electrolyte materials,anti-corrosion factors and structural materials to ensure the long-term stable operation of the grounding system.
3.Construction stage:bury the flexible grounding electrode in the key positions of the wind farm,such as wind turbines and substations.During the construction process,strictly control the construction quality to ensure good contact between the grounding body and the soil.
4.Testing and acceptance:After completing the construction,the grounding system is strictly tested and accepted to ensure that the performance of the grounding system meets the design requirements.
V.Effect evaluation
1.After the transformation of the wind farm,its lightning protection ability has been significantly improved.In the season of frequent lightning activities,the lightning damage rate of wind power equipment is significantly reduced,and the stable power supply capacity of the wind farm is effectively guaranteed.At the same time,the introduction of flexible grounding electrode lightning protection technology also improves the corrosion resistance of the grounding system and extends the service life of the equipment.
2.The application of flexible grounding technology in the project has a significant effect,greatly reducing the lightning strike tripping rate.In the three years before the transformation of No.1 and No.2 collector lines of Liangfeng Au wind farm,the lightning strike tripping led to the loss of power generation.However,after the completion of the technical modification project so far,there has not been any lightning strike tripping accident,which is expected to bring more than 1 million RMB of direct economic benefits per year.
VI.Conclusion and Prospect
1.The project won the first(2021)National Wind Turbine Technology Reform Annual Meeting of Excellent Achievements in Technology Reform Science and Technology.It can be seen that the flexible grounding technology has strong economic applicability,is of great significance to the new energy industry,especially the construction and operation and maintenance of wind farms,and is in the international leading position in terms of technical level and successful cases.
2.Flexible grounding technology overcomes the problems of unstable grounding system,unstable grounding resistance,and poor use of grounding network and short service life of grounding network under the state of lightning impact under the difficult environment of traditional grounding methods.It significantly reduces the industrial frequency and impact grounding resistance by improving the charge storage and lightning current discharge capacity of the material molecular structure,which has economic applicability and construction convenience and is worth promoting.And,flexible grounding electrode stability,conductive effect is superior,insoluble in water,no heavy metal pollution,in line with environmental requirements,future application prospects are wide,it is recommended that units with similar problems.
Want to know more about lightning protection engineering cases related information,welcome to call the hotline!
Recommended lightning protection products:
Flexible Grounding Electrode:excellent resistance effect+anti-corrosion environmental protection and safety+applicable to a variety of terrain
I.Project Background
Sichuan Yanyuan Liangfeng Au wind farm is located in the plateau area above 3000 metres above sea level,the geomorphological structure of the rocky soil,coupled with strong thunderstorms,resulting in high grounding resistance,equipment is difficult to ground effectively,which is likely to lead to over-voltage rebound problems,resulting in frequent lightning strikes in the wind farm tripping faults.Although routine testing showed that everything was normal,it was impossible to find out where the problem was.In order to solve this problem,we decided to use the flexible grounding electrode lightning protection technology to transform the wind farm.
II.The project needs
The main objective of the lightning protection and grounding renovation project is to improve the lightning protection capability of the wind power equipment,reduce the risk of lightning damage,and ensure the stable power supply of the wind farm through the introduction of flexible grounding electrode lightning protection technology.
III.The introduction of flexible grounding lightning protection technology
Flexible grounding lightning protection technology is a new type of lightning protection method,it has a high conductivity and corrosion resistance of flexible grounding materials,through the optimisation of the grounding system design,to achieve rapid discharge of lightning current,effectively protect wind power equipment from lightning damage.The use of flexible grounding technology can improve the structure of the grounding network,significantly improve the impact resistance of the ground network,fundamentally solve the problem of frequent lightning strikes tripping,and strengthen the operational stability of the wind farm.
IV.The implementation of the programme
1.Design stage:according to the actual situation of the wind farm,combined with the characteristics of flexible grounding lightning protection technology,detailed grounding system design.During the design process,full consideration of terrain,geology,climate and other factors to ensure the effectiveness of the grounding system.
2.Material selection:Selection of new grounding body materials composed of non-metallic conductive materials,electrolyte materials,anti-corrosion factors and structural materials to ensure the long-term stable operation of the grounding system.
3.Construction stage:bury the flexible grounding electrode in the key positions of the wind farm,such as wind turbines and substations.During the construction process,strictly control the construction quality to ensure good contact between the grounding body and the soil.
4.Testing and acceptance:After completing the construction,the grounding system is strictly tested and accepted to ensure that the performance of the grounding system meets the design requirements.
V.Effect evaluation
1.After the transformation of the wind farm,its lightning protection ability has been significantly improved.In the season of frequent lightning activities,the lightning damage rate of wind power equipment is significantly reduced,and the stable power supply capacity of the wind farm is effectively guaranteed.At the same time,the introduction of flexible grounding electrode lightning protection technology also improves the corrosion resistance of the grounding system and extends the service life of the equipment.
2.The application of flexible grounding technology in the project has a significant effect,greatly reducing the lightning strike tripping rate.In the three years before the transformation of No.1 and No.2 collector lines of Liangfeng Au wind farm,the lightning strike tripping led to the loss of power generation.However,after the completion of the technical modification project so far,there has not been any lightning strike tripping accident,which is expected to bring more than 1 million RMB of direct economic benefits per year.
VI.Conclusion and Prospect
1.The project won the first(2021)National Wind Turbine Technology Reform Annual Meeting of Excellent Achievements in Technology Reform Science and Technology.It can be seen that the flexible grounding technology has strong economic applicability,is of great significance to the new energy industry,especially the construction and operation and maintenance of wind farms,and is in the international leading position in terms of technical level and successful cases.
2.Flexible grounding technology overcomes the problems of unstable grounding system,unstable grounding resistance,and poor use of grounding network and short service life of grounding network under the state of lightning impact under the difficult environment of traditional grounding methods.It significantly reduces the industrial frequency and impact grounding resistance by improving the charge storage and lightning current discharge capacity of the material molecular structure,which has economic applicability and construction convenience and is worth promoting.And,flexible grounding electrode stability,conductive effect is superior,insoluble in water,no heavy metal pollution,in line with environmental requirements,future application prospects are wide,it is recommended that units with similar problems.
Want to know more about lightning protection engineering cases related information,welcome to call the hotline!
Recommended lightning protection products:
Flexible Grounding Electrode:excellent resistance effect+anti-corrosion environmental protection and safety+applicable to a variety of terrain
