"Protecting wind turbine blades against lightning is not about avoiding strikes, but attracting them," states LM Glasfiber, a global blade manufacturer, on a section of its Web site devoted to lightning. You can get this information from the authorities like national weather bureaus and other people who work with turbines. Thermoplastic wind turbine blades are still not a commercial reality, but Murray continues to work on structural validation for the innovative new manufacturing process and materials. The technology was developed by Billy Martin, director and senior research scientist in the Environmental Test Lab at WSU's National Institute for Aviation Research. The Grounding Problem manifests as Alarms 410, 426, 2106, 2118, 700. Figure 6 . US20090139739A1 - Lightning Protection System for a Wind Turbine Blade - Google Patents The invention relates to a lightning protection system for a wind turbine blade, where the blade is a shell. Lightning protection systems exist for conventional wind turbine blades. Introduction The capacity of wind turbine generators has been increasing and the most popular one is 1000-2000 kW. @article{osti_1661222, title = {Low cost carbon fiber as potential lightning strike protection for wind turbine blades}, author = {NLN, Vipin and Kore, Surbhi S. and Theodore, Merlin and Wang, Yeqing and Yousefpour, Kamran and Lin, Wenhua and Park, Chanyeop and Vaidya, Uday and Kunc, Vlastimil}, abstractNote = {Until recently, glass fiber composites (GFRP) were the preferred choice to prepare . of wind turbine [13], and to analyze the protection area of receptors [14]. How does wind turbine lightning protection work? To keep wind turbines safe from lightning, they are equipped with a lightning protection system (LPS), whose main purpose is to ground the electrical energy from lightning without causing damage to the blade structure. Lightning usually hits the sharpest and tallest object in an area because ground charges emitted from objects with high elevations reach to opposite charged streamers of the cloud . It may also melt or crack the blade's leading edges. nVent ERICO's GEN II lightning protection system offers engineers an . DTU Elektro. When lightning strikes at the blade with a de-icing heating system, the blade and its heating system are more easily damaged due to the overvoltage between the lightning protection system (LPS) of the blade and the heating . Capturing the stroke and safely transferring it to the ground without damage is critical to the entire turbine. 13 Because the sensors are installed on the down conductors in the blades instead of at the foundation of the turbine tower, it is possible to identify which . Finding a way to ensure thermoplastic wind turbine blades can benefit from the same level of lightning protection as traditional blades was an essential step in . Wind Turbine Lightning Protection. Lightning protection of modern wind turbines presents a number of new challenges due to the geometrical, electrical and mechanical particularities of turbines. A wind turbine blade with a lightning conductor, where said lightning conductor is formed by one or more oblong strips ( 1, 2, 3 ) of carbon fiber-reinforced plastics preferably forming part of the. Lightning protection systems exist for conventional wind turbine blades, but protection was needed for blades made from thermoplastic resin composites and manufactured using an innovative thermal (heat-based) welding process developed by scientists at the National Renewable Energy Laboratory (NREL). 2. The standard methods of protection include covering the blade with a mesh, foil, or a metallic . This service results in a component certificate for blades, laboratory approval or shop approval or is considered in the type certificate for the wind turbine. The rotor blade industry is entering its first truly large scale maintenance and decommissioning era, with vast numbers of assets entering the last half of their projected life span. Lightning protection for these large wind turbine generators is more important than that for small size. But protection was needed for blades made from a new type of material—thermoplastic resin composites — and manufactured. See Figure 2. "This makes it possible to direct the flow of the lightning and ensure that the components exposed to its effects can withstand the . The work presented in4,5 considered a generic 40 m wind turbine blade fitted with a receptor based lightning protec-tion system. It is noted that during the first year of operation of a newly installed wind turbine, 85% of down-time is lightning-related on a southwestern wind farm. NACELLE There are three essential elements in a lightning protection system (LPS) for a wind turbine, which are; lightning receptors (also called air termination points), lightning down conductors (runs through the blade) and grounding in the soil [1, 2], as depicted in Fig. Local damage to the area around receptors is still common. External lightning protection using conductors on the blade surface has been tried by a number of manufacturers, but problems with erosion of the lightning protection system material or corrosion has occurred in a number of instances. Lightning protection Are you ready for the new standard for lightning protection Lightning Protection Systems (LPS) for wind turbines are a spearhead skill for us at Polytech. The starting point of the inspection is defined by the procedure ofestablishing the facts regarding wind turbine's blades' surface and structural condition as well as the functionality of Lightning Protection System (LPS).Particular attention will be directed . Most manufacturers have decided the strategy of designing blade's LPS according to the research and operation experience. CT (small‐scale Rogowski coil), down conductor type: Small‐scale Rogowski coils are attached to the down conductors in the blades to detect when lightning strikes the wind turbine. Turbine blades and towers are prone to lightning strikes and lightning arresters are not the proper tools to protect the wind turbines against lightning damages. This means that a blade taking a direct lightning strike cannot easily absorb and transfer the electrical energy, resulting in often-catastrophic mechanical damage. Components cover a range of nVent ERICO products, including receptors, Cadweld exothermically welded connections, conducto rs, lightning event counters/ lightning registration systems. Lightning protection of flap system for wind turbine blades Candela Garolera, Anna Publication date: 2014 Document Version Publisher's PDF, also known as Version of record Link back to DTU Orbit Citation (APA): Candela Garolera, A. The Air Gap in OEM LPS leaves these turbines exposed to lightning and static attacks. 1. This was done at TVP workshops, site-specific visits, and wind industry conferences. Figure 5: Blade tip . Leading edge protection is the newest technology to protect and extend the life of rotor blades, whilst reducing future damage and ultimately energy, lost in down time. Sulzer Schmid and ENERTRAG Betrieb improve wind turbine blade inspections with a new drone-based lightning protection system testing solution. Figure 4: Catastrophic failure of a wind turbine due to a lightning strike. This begins with lightning receptors attached to the outside of the blades with an internal conductor leading the path to the base of the platform and eventually into the ground. Videos. However, the wind turbine blades are still hit by lightning strikes. IEC 61400-24 describes in detail how to protect these special parts of a wind turbine and how to prove the effectiveness of the lightning protection measures. One element is crucial to all wind-turbine lightning protection systems: a low resistance path to Earth. Lightning and Wind Turbines - 2 • Not all lightning strikes end up being intercepted by the receptor or the lightning protection points. Example of a wind turbine blade destroyed via a lightning strike Figure 2. The path goes from the blade's tip (figure 5) to the base of the turbine (figure 6). Lightning protection systems exist for conventional wind turbine blades, but protection was needed for blades made from thermoplastic resin composites and manufactured using an innovative thermal (heat-based) welding process developed by scientists at the National Renewable Energy . of the receptor based lightning protection system is reduced if the blade is fully treated with RAM4. Wind-turbine damage caused by lightning strikes seems unavoidable. First, a few facts to convey the danger that lightning poses to these power-producing windmills: According to a German study, lightning strikes accounted for 80% of wind turbine . nVent ERICO offers a family of lightning blade receptors as part of a complete range of superior lightning protection products for the wind energy industry. But with today's maintenance methods and lightning protection techniques, the actual downtime caused by lightning damage can be significantly reduced. Wind turbine lightning protection systems. abstract = "Exposure to adverse weather conditions is regarded as one of the most sensitive topics when it comes to wind turbines. Components cover a range of nVent ERICO products, including receptors, Cadweld exothermically welded connections, conductors, lightning event counters/ lightning registration systems. understanding of wind turbine lightning protection. Therefore, a solution with partial RAM treatment is needed. The LPS is Step 2: Peel and Stick. The method widely used throughout the industry at the present with wind turbine blades. Lightning Protection of Wind Turbines. The receptors are available as a stand-alone component or part of a complete preconfigured blade protection assembly. Blade Lightning Protection Systems . The next critical part of the lightning protection, as it relates to wind turbines, is the protection of the nacelle and the components within. Lightning protection of wind turbine blades. . Facts about lightning danger to wind turbines. In this paper, two lightning protection systems (metallic cap and receptor methods), commonly in use, are applied on a full scale polluted offshore wind turbine to compare their performance. Our proprietary StrikeTape is ultra-durable. Lightning protection systems exist for conventional wind turbine blades. Latest support by technical advancements in safety, ecology & engineering. The utility said that a blade broke last week on a Vestas V110-2.0 MW unit at the 170MW, 85-unit project and that it has "isolated the issue to Vestas blades . The features blend high performance and reliability, over the years positioning lm wind power as the largest and preferred supplier of wind turbine blades. But protection was needed for blades made from a new type of material—thermoplastic resin composites—and manufactured using an innovative thermal (heat-based) welding process developed by scientists at the National Renewable Energy Laboratory (NREL). Wind-turbine blades, the nacelle, structural components, the drive train, low-voltage control systems, and high-voltage power systems all must be protected. Step 1: Clean The Blade Surface. The ever-expanding popularity of wind generated power in order to satisfy both needs and desires for cleaner production methods is hindered and slowed by issues that have no absolute solutions. Lightning protection of flap system for wind turbine blades. View Aerones robotic systems in action. Our highly experienced consultants, managers and client representatives are proficient in all LEP . Order intelligent wind turbine blade maintenance, inspection, and repair services to save costs, reduce downtime and idle stay days. Lightning strikes happens in a fraction of time, where they can transfer huge amounts of charge and high currents in a single strike. (2014). . The first step in protecting a wind turbine against lightning strikes is to assess the area's local lightning occurrence. Generally, wind turbine blades are fabricated from composite, non-conducting materials. The chances for a structure to be struck by lightning increases as the height increases; thus, tall structures are more prone to lightning. Lightning protection Wind power turbine Winter lightning Blade 1. When an unprotected wind-turbine blade is struck by lightning, its temperature will rise (as high as 54,000 F) and severely damage the surface of the blade. But protection was needed for blades made from a new type of material—thermoplastic… Lightning Protection Systems are a necessity for protecting a wind turbine and wind turbine blades. The nacelle is a housing that encloses the generator, gear box and associated electronic systems as shown in Figure 4. Lightning protection assemblies have been installed on thousands of wind turbine blades worldwide. lightning damage to a wind turbine blade. Lightning protection systems costs less than 1% of the total capital expenses while improving the cost-effectiveness and reliability of a wind turbine substantially. Better protection for wind turbine blades from lightning strikes With lightning strikes costing wind turbine operators up to EUR 1.5 million in repairs and lost revenue, a replacement, ready-to-install, Lightning Protection System which can pay for itself in 2-3 years is already sparking much interest. Owing to that, the present work introduces a new approach for a lightning protection system for wind turbine blades where preliminary investigations were done using Analysis Systems (ANSYS). Leading Edge Protection when installed, can greatly improve the lifespan of a blade, which in turn increases the AEP (Annual Energy Production) of the turbine. The protection takes the form of a low resistance path to ground. Wind Turbine Lightning Protection. Experimental studies revealed following issues. Blades . Lightning protection for wind turbines is becoming an increasingly complex and important topic with the increased use of carbon fiber in rotor blades. After all, wind-turbine farms by their nature are located in a very active weather zones. Despite the existing lightning protection systems available for wind turbine blades, there are still many cases reported . Through technology innovation, we are developing new wind energy solutions to get more from every turn. Over the past decade, we've all watched the world's energy markets shift towards cleaner, alternative sources. Sulzer Schmid and ENERTRAG Betrieb join hands to provide a new wind turbine blade inspection solution that integrates ENERTRAG Betrieb's innovative lightning protection systems (LPS) testing solution with Sulzer Schmid's UAV technology and digital . Without a continuous grounding path, lightning wreaks systemic havoc in the turbine, sometimes even cracking blade roots. best website builder . In order to solve the problem of icing on the surface of wind turbine blade, a heating system that includes a carbon fiber net (CFN) and power cables is proposed recently. Tempest Wind, Wind Turbine Rotor Blade services. blades and the complete wind turbine. Contact Us for Wind Turbine Blade Consultants, Technical Advisors, Rotor Blade Repairs & Upgrades. The utility said that a blade broke last week on a Vestas V110-2.0 MW unit at the 170MW, 85-unit project and that it has "isolated the issue to Vestas blades . Lightning protection measures for wind turbines are becoming important as the use of wind turbines is increasing rapidly along with its capacity and height. Be a part of the wind energy maintenance transition - it's time to place the technicians on the ground and the tools in the sky. Energy © Igor Kovalenko, Shutterstock The salient issues related to lightning protection of long wind-turbine blades are discussed in this paper. Figure 4. Lightning protection systems exist for conventional wind turbine blades. Fig. MidAmerican Energy is inspecting Vestas wind turbine blades equipped "with a certain lightning protection system" following a blade failure at its Beaver Creek wind farm in Iowa. Example of Lightning Damage to a Wind Turbine Blade Blades are commonly damaged by lightning, other parts of the turbine, however, are susceptible to lightning damage as well: LPS receptors and down conductors can melt, power electronics can be damaged, and fires can initiate. We show that the lightning protection of modern wind turbines presents a number of new challenges due to the geometrical, electrical, and mechanical particularities of the turbines. With the tips of blades reaching far above most structures around them, wind turbines are prone to lightning attachments. Blades have been known to explode, whilst the key mechanical components have been destroyed and rendered ineffective. Surface preparation is critical, and we'll show you how to do it properly in our installation videos and PDFs. Yet, applying it is incredibly simple: just peel off the adhesive backing and apply to the wind turbine blade. Also, MLI participated in the development of an International Electrotechnical Commission (IEC) wind turbine lightning-protection technical report, IEC 61400-24 (CDV), which is expected to be released in 2001. If this stepped leader is somewhere nearby a wind turbine (or another similar structure) the second phase of the phenomenon may start: an "upward leader" from the blade connecting with the downward leader and closing the circuit. A wind turbine blade with a lightning conductor, where said lightning conductor is formed by one or more oblong strips (1, 2, 3) of carbon fiber-reinforced plastics preferably forming part of the wind turbine blade.In this manner the oblong strips (1, 2, 3) of carbon fiber-reinforced plastics both reinforce the blade and divert the lightning. The risk assessment for the lightning-protection-system design is solely based today on downward flashes . Validation of a lightning protection system for a fusion-welded thermoplastic composite wind turbine blade tip Robynne E Murray, Andy Plumer, Ryan Beach, and Peter Broome Wind Engineering 0 10.1177/0309524X211024642 Over time, this cable could become damaged, increasing the risk of loss of function of the turbine, leading to knock on effects on energy production and revenue. Protect your turbines from lightning strikes and minimize the risk of severe damage. Wind Blade Lightning Strike Protection How Dexmet Lighting Strike Materials Protect Carbon Fiber Wind Blades As power output requirements increase for wind turbines, wind generator manufacturers are moving towards larger blades to rotate these larger turbines at lower wind speeds. Lightning protection Customised Lightning Protection Systems Lightning Key Data System Lightning Card System The rotor blade includes a lightning protection system. September 12, 2017. We discuss in this chapter the salient issues related to lightning protection of large wind turbine blades. Technological advancements in renewable industries like wind, solar, and tidal, have enabled us to make these potential solutions a reality. The Lightning and surge protection for wind turbine system protects two sub-systems which can only be found in wind turbines, namely the rotor blades and the mechanical power train. In order to understand the manner of lightning attachment to wind turbine blades, experiments with various types of blade samples were conducted. Just by virtue of their height, they will get struck. Example nacelle and internal components According to IEC 61400-24, wind turbine blades are protected at LPL1 level if there is a 99% probability that lightning current parameters will be within the range 3 kA - 200 kA, and the protection system is adequate to withstand that range of current. In order to protect against lightning damage, the structure must have a virtually unimpeded resistance path to ground. Sylawa says manufacturers typically equip wind turbines with some form of basic lightning protection that uses grounding down conductors in the blades and grounding systems in the turbine. Overvoltage and overcurrent are produced in this process, causing equipment damage and even threatening . According to the standard, DNV examines corresponding components of wind turbines to confirm the proper design of lightning protection system of e.g. The lightning protection system for wind turbine blades usually consists of a metallic conductor cable that drives the current from the extreme of the blade to the root. The standard features for all LM Wind Power blade types include pre-bending, integrated gel coat, lightning conducting systems, low noise tips and tried and tested root solutions. Sulzer Schmid and ENERTRAG Betrieb have teamed up to provide a new wind turbine blade inspection solution that integrates ENERTRAG Betrieb's lightning protection systems . During thunderstorms, wind turbines are often struck by lightning, resulting in significant damage. Lightning is one of the main reasons for failure of the wind turbine, the arc generated by lightning strikes lightning arrester on the blade, and the lightning current passes through the inside of the blade and then passes to the hub, the nacelle and the tower, and finally into the earth. As new wind turbines pop up by the thousands, the odds of them getting struck by lightning also increase. This path is shown in figure 7. Leading edge protection Kruger Energy chooses ELLE™ Polytech protects wind turbines against leading edge erosion in Canada - and around the world. MidAmerican Energy is inspecting Vestas wind turbine blades equipped "with a certain lightning protection system" following a blade failure at its Beaver Creek wind farm in Iowa. Proper protection & testing One way to reduce the likelihood of strike damage is to build lightning protection directly into wind turbines. A new technology aimed at protecting wind turbine blades from lightning strikes is being implemented between WSU and Westar Energy. • The main mechanism of damage is when the lightning current penetrates the blade and forms an arc inside. But protection was needed for blades made from a new type of material—thermoplastic resin composites — and manufactured using an innovative thermal (heat-based) welding process developed by scientists at the National Renewable Energy Laboratory (NREL). Often totals for lightning-related damage and repair will exceed $250,000. Patent-pending Thermal Welding Process How dielectric changes affect wind turbine blades. In these circumstances, the best solutions provided are technologically advanced avoidance mechanisms in order to . Provisions for personnel safety must also be maintained. Lightning protection systems installed at the factory offer a good start to managing your risks, but most turbine owners find out diverter strips and other aftermarket protection is required to protect their investment. A rotor blade for a wind turbine is described. Order services . In a wind turbine (104, 500, 704) having a plurality of blades (132, 404, 516, 744) and a blade rotor hub (120, 712), a lightning protection system (100, 504, 700) for conducting lightning strikes to any one of the blades and the region surrounding the blade hub along a path around the blade hub and critical components of the wind turbine, such . Thereby, the rotor blade body includes a non-conductive material, at least one receptor adapted to be a location for lightning impact, an insulated down conductor element within the rotor blade body, wherein the insulated down conductor includes: a down conductor, wherein the down conductor . Lightning protection systems exist for conventional wind turbine blades. GEV Wind Power's technical team contains several industry recognized specialists, across various LEP topics, from installations to the theory of LEP and aerodynamics of a blade. 1 Typical Lightning Protection System for Wind Turbine - adapted . Candela, A.G. et al: Lightning Damage to Wind Turbine Blades from Wind Farms in U.S., IEEE Transactions on Power Delivery The lightning protection standards describe how wind turbine blades should be protected to LPL1 (200kA strike) from the tip and down to radius 20m, whereas only a few evidences of such exposure has been presented. ArcGuide™ Enhanced Lightning Protection Our novel blade coating, ArcGuide™, improves the performance of standard wind turbine lightning protection systems to reduce costly blade damage and downtime. 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