New Energy Lightning Protection And Grounding Engineering Solutions
I.Background Analysis
As a major energy producer and consumer,China's new energy industry scale has ranked among the world's leading.In recent years,China's wind power,photovoltaic power generation as the representative of the new energy development has been effective,the installed capacity of the world's first,the share of power generation has been steadily increasing.Clean energy sources such as solar and wind power are widely used because of their sustainable and environmentally friendly characteristics.
However,most of the new energy power generation facilities are located in regions with complex geographic environments and variable climates,and are therefore susceptible to the effects of the natural environment.Wind power generation,in particular,is commonly threatened by strong thunderstorms.On high-altitude mountaintops,the towering and protruding fuselage and blade tips of wind turbines are extremely vulnerable to lightning strikes.
In addition,the mountainous,Gobi and desert landscapes where wind farms are located dictate high resistivity of the earthing network,making it difficult to effectively ground the equipment.Even if the grounding resistance(industrial frequency)test is qualified,in the event of a lightning strike,it will still trip the power outage,or even burn the equipment,resulting in economic losses.Therefore,lightning protection engineering is an important guarantee for the safe and stable operation of new energy generation.
II.The demand for lightning protection project analysis
1.new energy equipment such as wind turbines,solar panels are usually installed in high-altitude areas,and the tip of the fan blade protrudes,to facilitate the convergence of charge,more likely to suffer direct lightning strikes.
2.new energy field is located in the stone less soil,poor water content of the landscape makes the grounding resistance remains high,grounding network storage of free charge capacity is insufficient,especially in the high-frequency impact of grounding resistance and ground voltage will instantly rise,causing over-voltage counterattack tripping.
3.lightning accompanied by high-intensity electromagnetic induction,in the line to produce a large amount of impulse energy,causing overvoltage,overcurrent,resulting in equipment failure losses.
4.Induced lightning invades the metal conductor,the potential difference between adjacent metals can form 10kV level,causing spark discharge in the metal gap,extremely dangerous.
5.The new energy field is located in the field,the metal grounding pole is susceptible to environmental corrosion,so that the grounding network has a low service life.Some low-cost resistance reduction measures(such as the use of resistance reduction agent)will make the metal grounding electrode by electrochemical corrosion and further reduce the service life of the grounding network,resulting in major safety hazards,but increased operation and maintenance costs.
6.Alpine hydropower station,water photovoltaic power station,fishing photovoltaic power station,offshore wind farms,offshore photovoltaic and other new water energy power plant grounding network is placed underwater,the metal grounding electrode is susceptible to corrosion by the water body.New energy equipment stands on the flat and wide water surface,easy to induce lightning strikes.The wet environment on the water is easy to make the surface of the electrical equipment to form condensation droplets,under the action of the electric field caused by distortion,resulting in partial discharge,resulting in insulators,cable joints,busbar phase to phase,etc.was pierced,resulting in accidents,that is,"wet discharge".When it is cold,condensation will form ice on the surface of the fan blades,which can even cause the blades to break in severe cases.In addition,the high humidity and salty air in the sea and offshore areas cause metal parts to corrode and break,seriously affecting the service life of new energy power generation equipment.
III.Lightning protection engineering solutions
1.Construct qualified grounding network:a good grounding environment is a prerequisite for lightning protection equipment such as flashover(lightning rod)and lightning arrester to work.Oumaan Technology Group-Heilongjiang Hengdian Lightning Protection Engineering Co.,Ltd.developed flexible grounding technology,to quickly create a low resistivity and stable current-dispersing environment.Expanding the grounding grid's ability to store free charge increases its resistance to high-frequency shocks.The material used in the technology,"Flexible Grounding Electrode HD-R10",microscopically creates a multi-dimensional,all-encompassing charge movement channel to enhance the efficiency of the grounding grid in discharging the lightning current.
Tested,HD-R10 impact resistance rate of change of 0.36%,even in high-frequency impact,grounding resistance can still maintain a low value,greatly reducing the probability of counterattack tripping,to protect the stability of new energy generation.flexible grounding electrode HD-R10 moisture content of 65%,so in arid areas can also make the low resistivity long-term effective maintenance.The material is tightly wrapped around the metal grounding electrode,so that it does not come into contact with soil and oxygen to slow down the corrosion rate.The application of this technology can extend the service life of galvanised flat steel by six times.HD-R10 is insoluble in water after moulding and tested to meet the EU ROHS standard,which will not endanger the human body or pollute the wild environment.Flexible grounding technology construction is convenient,in the field of new energy generation,especially the construction and operation and maintenance of wind farms has a strong economic applicability.In Guangdong,Guangxi,Hainan,Guizhou,Yunnan,Sichuan,Chongqing,Hunan,Hubei,Fujian,Jiangxi,Shandong,Heilongjiang,Qinghai,Xinjiang and other areas of new energy power generation projects to achieve a large number of successful cases.
2.Lightning protection measures in large areas:In wind farms,overhead lines,photovoltaic power stations,water photovoltaic power stations,such new energy projects that cover a large area,are susceptible to lightning strikes,and are difficult to accurately investigate lightning strike problems,HD-LDL lightning online monitoring system should be used.This is a patented technology developed by Oumaan Technology Group-Heilongjiang Hengdian Lightning Protection Engineering Co.,Ltd.which is compatible with the existing system of smart grid,and can dynamically monitor the value of grounding resistance at various places,and react in real time to whether the tower is in the lightning overvoltage,and at the same time,make the judgement of the direct lightning strike and counter lightning strike.Through data intelligent monitoring and collection,it achieves the function of empirical data collection and risk warning.Not only can reduce the time and cost of accident investigation,but also based on the data to accurately locate and set up additional protective measures,but also real-time to give the cause of the problem,targeted transformation.
3.Lightning protection measures for key protection areas:Lightning catchers(lightning rods)can be installed at high places to attract lightning and lead it underground to protect important equipment from direct lightning.On the top of important facilities/buildings,HD-PLR plasma lightning rejector can be installed to achieve active lightning,in the key areas to disperse lightning.HD-PLR using the array of multiple needles of the"tip-like effect",in the thundercloud electric field of the excitation of the power supply that is responsive to the operation,so as to make the target of the protection of the electric field in the relatively low and safe.plr Built-in composite strong ionisation discharger can not be inhibited by the"self-shielding effect"of the traditional lightning eliminator,ionising a high concentration of plasma,efficiently neutralising the charge at the bottom of the thundercloud,forming a leakage"bad capacitance"between the cloud and the ground,eliminating the lightning precursor in time and ensuring that no lightning strikes are induced within the protection area and guarantees energy security.In the process of ionisation,the rise of positive ions is conducive to air purification,and the fall of negative ions is conducive to the health of living organisms.Both the lightning catcher and the lightning repeller can be installed with a lightning warning device with data storage function,which can be used with HD-LDL lightning online monitoring system.
4.Fan blade lightning protection measures:installed at the top of the blade HD-PLR lightning needle plate,"like the tip effect"principle is the same as above,by the thundercloud excitation that is to change the blade electric field environment,to eliminate the lightning pilot,to ensure that the fan blade will not trigger a direct lightning strike.PLR lightning needle plate built-in ionisation unit can be dispersed thundercloud charge,grounding unit can be made to connect the needle plate with the earth,effectively neutralise the lightning and lightning.The needle plate is connected to the earth,effectively neutralising the cloud-earth charge.In addition,the blades of the fan should be sprayed with DSAN double-hydrophobic bionic coating,super-hydrophobic,super-oil-phobic,super-self-cleaning characteristics can effectively prevent the formation of condensation on the surface of the fan,dirt flash and other easy to trigger the electric field aberration factors.Greatly reduce the probability of direct lightning strikes on fan blades.
5.Induced lightning protection measures:power surge Protection Device(power arrester)is installed at the power input of the equipment,when the induced lightning invades the line,the lightning current will be conducted into the earth,to ensure the safe operation of the equipment.HD series of surge Protection Devices response time are at the nanosecond(ns)level.In addition,electrical equipment and metal conductors need to be equipotential connection,to avoid electrical equipment due to the potential difference formed by lightning and discharge each other,to avoid the metal gap spark discharge,causing fire and other hazards.
6.Underwater grounding network:for the water photovoltaic power stations,alpine hydropower stations,offshore wind turbines and other grounding is difficult to complete the problem,Heilongjiang Hengdian Lightning Protection Engineering Co.,Ltd.developed a flexible grounding electrode applied to underwater and obtained a national patent.The metal body core into a special casing inside the casing cavity poured into the"flexible grounding electrode HD-R10"to fill the remaining space.The entire grounding network is placed underwater,protecting the flexible grounding electrode with the casing and the metal grounding pole with the flexible grounding electrode.All materials are environmentally friendly and protect the metal grounding electrode from corrosion in the water column,maximising the life of the grounding grid.
7.Water/sea new energy equipment lightning protection measures:HD-PLR plasma lightning rejector inside the composite strong ionisation discharge device even in the most difficult ionisation conditions at sea level can still achieve safe protection,protection angle 84°,in the focus of the protection area to achieve the dispersal of lightning.PLR in the coastal areas of strong thunderstorms,near the sea,the island,the naval base,and other areas to achieve a large number of successful cases.For the new energy metal parts caused by condensation,salt spray and other phenomena such as discharge breakdown,corrosion,icing and other problems,DSAN"double sparse"bionic coating can effectively prevent the formation of water droplets,water film on the surface of the parts.Even in highly humid environments,it can still maintain"superhydrophobicity",ensuring that the surface of the equipment is dry and free of water droplets,and there are no discharge channels for condensation,so it is not easy to induce lightning strikes,which strengthens the reliability of the new energy operation.
The"superhydrophobic"feature of DSAN's"Double Sparse"bionic coating also prevents salt droplets from sticking to the surface of the substrate during salt spray dispersion,thus eliminating the possibility of galvanic corrosion.The hydrophobic migration structure determines the delayed icing and easy de-icing characteristics of the coating surface,avoiding the impact of ice damage in severe cold weather.In addition,the super oleophobic and self-cleaning qualities of DSAN bionic coatings can also effectively prevent the surface of the substrate from bird droppings and dirt flashes that can lead to creeping and breakdown.It can be sprayed on the surface of new energy fan blades,various types of insulators,insulating bushings,insulating pillars,electric power towers and other equipment,effectively resisting the harsh environment of high humidity in the water climate and high salt in the coastal areas.
IV.Summary
Lightning protection engineering is an important part of ensuring the safety and stability of new energy power generation equipment.According to different needs,the implementation of targeted lightning protection measures,you can greatly reduce the risk of failure of new energy equipment due to lightning strikes,to ensure the stability of equipment operation.At the same time,to strengthen the management and maintenance of lightning protection work is to ensure that the lightning protection system is the key to long-term effective operation.
Want to get more flexible grounding electrode related information,welcome to call the hotline!
Recommended lightning protection products:
HD-Y Series Optimised Lightning Rod:larger protection radius+longer service life
HD-R10 Flexible Grounding Electrode:significant resistance effect+corrosion+safety and environmental protection+construction convenience
HD Series Surge Protection Device:low output residual voltage+long service life+high safety performance
HD-PLR Plasma Lightning Repellent:critical areas to disperse lightning,simple installation,can be used for active targets
HD-LDL Lightning Online Monitoring System:real-time online monitoring+rapid warning function+provide effective data
DSAN Double Sparse Bionic Coating:Anti-condensation,salt spray+anti-corrosion,dirt flash+anti-ice disaster+simple spraying
I.Background Analysis
As a major energy producer and consumer,China's new energy industry scale has ranked among the world's leading.In recent years,China's wind power,photovoltaic power generation as the representative of the new energy development has been effective,the installed capacity of the world's first,the share of power generation has been steadily increasing.Clean energy sources such as solar and wind power are widely used because of their sustainable and environmentally friendly characteristics.
However,most of the new energy power generation facilities are located in regions with complex geographic environments and variable climates,and are therefore susceptible to the effects of the natural environment.Wind power generation,in particular,is commonly threatened by strong thunderstorms.On high-altitude mountaintops,the towering and protruding fuselage and blade tips of wind turbines are extremely vulnerable to lightning strikes.
In addition,the mountainous,Gobi and desert landscapes where wind farms are located dictate high resistivity of the earthing network,making it difficult to effectively ground the equipment.Even if the grounding resistance(industrial frequency)test is qualified,in the event of a lightning strike,it will still trip the power outage,or even burn the equipment,resulting in economic losses.Therefore,lightning protection engineering is an important guarantee for the safe and stable operation of new energy generation.
II.The demand for lightning protection project analysis
1.new energy equipment such as wind turbines,solar panels are usually installed in high-altitude areas,and the tip of the fan blade protrudes,to facilitate the convergence of charge,more likely to suffer direct lightning strikes.
2.new energy field is located in the stone less soil,poor water content of the landscape makes the grounding resistance remains high,grounding network storage of free charge capacity is insufficient,especially in the high-frequency impact of grounding resistance and ground voltage will instantly rise,causing over-voltage counterattack tripping.
3.lightning accompanied by high-intensity electromagnetic induction,in the line to produce a large amount of impulse energy,causing overvoltage,overcurrent,resulting in equipment failure losses.
4.Induced lightning invades the metal conductor,the potential difference between adjacent metals can form 10kV level,causing spark discharge in the metal gap,extremely dangerous.
5.The new energy field is located in the field,the metal grounding pole is susceptible to environmental corrosion,so that the grounding network has a low service life.Some low-cost resistance reduction measures(such as the use of resistance reduction agent)will make the metal grounding electrode by electrochemical corrosion and further reduce the service life of the grounding network,resulting in major safety hazards,but increased operation and maintenance costs.
6.Alpine hydropower station,water photovoltaic power station,fishing photovoltaic power station,offshore wind farms,offshore photovoltaic and other new water energy power plant grounding network is placed underwater,the metal grounding electrode is susceptible to corrosion by the water body.New energy equipment stands on the flat and wide water surface,easy to induce lightning strikes.The wet environment on the water is easy to make the surface of the electrical equipment to form condensation droplets,under the action of the electric field caused by distortion,resulting in partial discharge,resulting in insulators,cable joints,busbar phase to phase,etc.was pierced,resulting in accidents,that is,"wet discharge".When it is cold,condensation will form ice on the surface of the fan blades,which can even cause the blades to break in severe cases.In addition,the high humidity and salty air in the sea and offshore areas cause metal parts to corrode and break,seriously affecting the service life of new energy power generation equipment.
III.Lightning protection engineering solutions
1.Construct qualified grounding network:a good grounding environment is a prerequisite for lightning protection equipment such as flashover(lightning rod)and lightning arrester to work.Oumaan Technology Group-Heilongjiang Hengdian Lightning Protection Engineering Co.,Ltd.developed flexible grounding technology,to quickly create a low resistivity and stable current-dispersing environment.Expanding the grounding grid's ability to store free charge increases its resistance to high-frequency shocks.The material used in the technology,"Flexible Grounding Electrode HD-R10",microscopically creates a multi-dimensional,all-encompassing charge movement channel to enhance the efficiency of the grounding grid in discharging the lightning current.
Tested,HD-R10 impact resistance rate of change of 0.36%,even in high-frequency impact,grounding resistance can still maintain a low value,greatly reducing the probability of counterattack tripping,to protect the stability of new energy generation.flexible grounding electrode HD-R10 moisture content of 65%,so in arid areas can also make the low resistivity long-term effective maintenance.The material is tightly wrapped around the metal grounding electrode,so that it does not come into contact with soil and oxygen to slow down the corrosion rate.The application of this technology can extend the service life of galvanised flat steel by six times.HD-R10 is insoluble in water after moulding and tested to meet the EU ROHS standard,which will not endanger the human body or pollute the wild environment.Flexible grounding technology construction is convenient,in the field of new energy generation,especially the construction and operation and maintenance of wind farms has a strong economic applicability.In Guangdong,Guangxi,Hainan,Guizhou,Yunnan,Sichuan,Chongqing,Hunan,Hubei,Fujian,Jiangxi,Shandong,Heilongjiang,Qinghai,Xinjiang and other areas of new energy power generation projects to achieve a large number of successful cases.
2.Lightning protection measures in large areas:In wind farms,overhead lines,photovoltaic power stations,water photovoltaic power stations,such new energy projects that cover a large area,are susceptible to lightning strikes,and are difficult to accurately investigate lightning strike problems,HD-LDL lightning online monitoring system should be used.This is a patented technology developed by Oumaan Technology Group-Heilongjiang Hengdian Lightning Protection Engineering Co.,Ltd.which is compatible with the existing system of smart grid,and can dynamically monitor the value of grounding resistance at various places,and react in real time to whether the tower is in the lightning overvoltage,and at the same time,make the judgement of the direct lightning strike and counter lightning strike.Through data intelligent monitoring and collection,it achieves the function of empirical data collection and risk warning.Not only can reduce the time and cost of accident investigation,but also based on the data to accurately locate and set up additional protective measures,but also real-time to give the cause of the problem,targeted transformation.
3.Lightning protection measures for key protection areas:Lightning catchers(lightning rods)can be installed at high places to attract lightning and lead it underground to protect important equipment from direct lightning.On the top of important facilities/buildings,HD-PLR plasma lightning rejector can be installed to achieve active lightning,in the key areas to disperse lightning.HD-PLR using the array of multiple needles of the"tip-like effect",in the thundercloud electric field of the excitation of the power supply that is responsive to the operation,so as to make the target of the protection of the electric field in the relatively low and safe.plr Built-in composite strong ionisation discharger can not be inhibited by the"self-shielding effect"of the traditional lightning eliminator,ionising a high concentration of plasma,efficiently neutralising the charge at the bottom of the thundercloud,forming a leakage"bad capacitance"between the cloud and the ground,eliminating the lightning precursor in time and ensuring that no lightning strikes are induced within the protection area and guarantees energy security.In the process of ionisation,the rise of positive ions is conducive to air purification,and the fall of negative ions is conducive to the health of living organisms.Both the lightning catcher and the lightning repeller can be installed with a lightning warning device with data storage function,which can be used with HD-LDL lightning online monitoring system.
4.Fan blade lightning protection measures:installed at the top of the blade HD-PLR lightning needle plate,"like the tip effect"principle is the same as above,by the thundercloud excitation that is to change the blade electric field environment,to eliminate the lightning pilot,to ensure that the fan blade will not trigger a direct lightning strike.PLR lightning needle plate built-in ionisation unit can be dispersed thundercloud charge,grounding unit can be made to connect the needle plate with the earth,effectively neutralise the lightning and lightning.The needle plate is connected to the earth,effectively neutralising the cloud-earth charge.In addition,the blades of the fan should be sprayed with DSAN double-hydrophobic bionic coating,super-hydrophobic,super-oil-phobic,super-self-cleaning characteristics can effectively prevent the formation of condensation on the surface of the fan,dirt flash and other easy to trigger the electric field aberration factors.Greatly reduce the probability of direct lightning strikes on fan blades.
5.Induced lightning protection measures:power surge Protection Device(power arrester)is installed at the power input of the equipment,when the induced lightning invades the line,the lightning current will be conducted into the earth,to ensure the safe operation of the equipment.HD series of surge Protection Devices response time are at the nanosecond(ns)level.In addition,electrical equipment and metal conductors need to be equipotential connection,to avoid electrical equipment due to the potential difference formed by lightning and discharge each other,to avoid the metal gap spark discharge,causing fire and other hazards.
6.Underwater grounding network:for the water photovoltaic power stations,alpine hydropower stations,offshore wind turbines and other grounding is difficult to complete the problem,Heilongjiang Hengdian Lightning Protection Engineering Co.,Ltd.developed a flexible grounding electrode applied to underwater and obtained a national patent.The metal body core into a special casing inside the casing cavity poured into the"flexible grounding electrode HD-R10"to fill the remaining space.The entire grounding network is placed underwater,protecting the flexible grounding electrode with the casing and the metal grounding pole with the flexible grounding electrode.All materials are environmentally friendly and protect the metal grounding electrode from corrosion in the water column,maximising the life of the grounding grid.
7.Water/sea new energy equipment lightning protection measures:HD-PLR plasma lightning rejector inside the composite strong ionisation discharge device even in the most difficult ionisation conditions at sea level can still achieve safe protection,protection angle 84°,in the focus of the protection area to achieve the dispersal of lightning.PLR in the coastal areas of strong thunderstorms,near the sea,the island,the naval base,and other areas to achieve a large number of successful cases.For the new energy metal parts caused by condensation,salt spray and other phenomena such as discharge breakdown,corrosion,icing and other problems,DSAN"double sparse"bionic coating can effectively prevent the formation of water droplets,water film on the surface of the parts.Even in highly humid environments,it can still maintain"superhydrophobicity",ensuring that the surface of the equipment is dry and free of water droplets,and there are no discharge channels for condensation,so it is not easy to induce lightning strikes,which strengthens the reliability of the new energy operation.
The"superhydrophobic"feature of DSAN's"Double Sparse"bionic coating also prevents salt droplets from sticking to the surface of the substrate during salt spray dispersion,thus eliminating the possibility of galvanic corrosion.The hydrophobic migration structure determines the delayed icing and easy de-icing characteristics of the coating surface,avoiding the impact of ice damage in severe cold weather.In addition,the super oleophobic and self-cleaning qualities of DSAN bionic coatings can also effectively prevent the surface of the substrate from bird droppings and dirt flashes that can lead to creeping and breakdown.It can be sprayed on the surface of new energy fan blades,various types of insulators,insulating bushings,insulating pillars,electric power towers and other equipment,effectively resisting the harsh environment of high humidity in the water climate and high salt in the coastal areas.
IV.Summary
Lightning protection engineering is an important part of ensuring the safety and stability of new energy power generation equipment.According to different needs,the implementation of targeted lightning protection measures,you can greatly reduce the risk of failure of new energy equipment due to lightning strikes,to ensure the stability of equipment operation.At the same time,to strengthen the management and maintenance of lightning protection work is to ensure that the lightning protection system is the key to long-term effective operation.
Want to get more flexible grounding electrode related information,welcome to call the hotline!
Recommended lightning protection products:
HD-Y Series Optimised Lightning Rod:larger protection radius+longer service life
HD-R10 Flexible Grounding Electrode:significant resistance effect+corrosion+safety and environmental protection+construction convenience
HD Series Surge Protection Device:low output residual voltage+long service life+high safety performance
HD-PLR Plasma Lightning Repellent:critical areas to disperse lightning,simple installation,can be used for active targets
HD-LDL Lightning Online Monitoring System:real-time online monitoring+rapid warning function+provide effective data
DSAN Double Sparse Bionic Coating:Anti-condensation,salt spray+anti-corrosion,dirt flash+anti-ice disaster+simple spraying
