Tuesday, October 27, 2020

Wind Turbine Surge Protection Systems Improve Efficiency

 Wind Turbine Surge Protection Systems Improve Efficiency 

 

 

The two most important ways to improve nearly any system is to reduce the cost of operation and increase the capacities of the product being produced.  When it comes to power production, we are talking about reducing the amount of maintenance necessary to keep the exposed elements of the system in working order as well as the costs associated with the components themselves.  Traditional methods of power production involve the purchase of a fuel source like coal or oil, which will also impact the prices which are ultimately paid by consumers for the electrical product.  Green energy technologies do not need to purchase the fuel source as they utilize natural occurring elements like wind and sun in order to turn turbines which produce electricity.  The costs associated with these types of systems are generally in maintenance, as certain characteristics create higher repair costs than fossil fuel systems will have.  As an example, we can look at wind power production as a method of producing electricity that has advantages and disadvantages.  The advantages over fossil fuels are that there is no pollution being generated through the burning of a fuel source, as well as having the potential to be produced at lower costs in the future.  As the technologies involved in systems such as this are improved, the prices associated with production are driven down.  Eventually, improvements to the systems will create situations where the power is generated at a lower cost than the comparable fossil fuel systems, ultimately making fossil fuel power systems obsolete.  When a production method is both more environmentally damaging and also more expensive, there is no reason for that type of system to be chosen over a better, cleaner method.  We are on the verge of this situation with wind power production. 

 

The disadvantages to wind turbine systems are that they are easily damaged by inclement weather and lightning strikes, and have limited capacities as far as production and storage.  With regards to the production capacities, power can only be generated when the wind is blowing.  This means that through the development of better energy storage systems, we can harness and distribute more electricity even when the wind is not blowing.  By developing better methods of avoiding damage as a result of the known primary sources of damage, we can also drive down costs by not only keeping the systems online for longer periods of time but also by reducing costs of maintenance.  Wind towers are notoriously difficult to maintain, and any extension of the lifespan of the equipment involved reduces costs significantly.  Lightning strikes to the blades and nacelle are difficult to avoid, but through the development of cheaper composite materials we can reduce their replacement costs.  Even more impactful is the development of improved surge protection systems that can be integrated into wind towers in order to isolate damage of a lightning strike to the strike point itself.  Lightning strikes produce power surges which move from the strike point through the system and overwhelm computerized equipment attached.  By isolating the surge to the area around the strike point, we can protect the equipment downstream and further drive down costs.  Eventually, this will result in cheaper power being produced by wind towers then by fossil fuel systems. 

Why Surge Protection Systems Are Necessary On Wind Turbines

 Why Surge Protection Systems Are Necessary On Wind Turbines 

 

 

Climate conditions are continually changing, and when combined with an ever-increasing global dependence on fossil fuels, the worldwide interest in sustainable and renewable energy and resources grows every year.  From those who are adamantly pushing for renewable energy to be adopted in a more widespread way due to climate change concerns, to those who are interested in renewal models as a method of creating cheaper power for the masses, all interest revolves around the development of more technologically advanced wind turbines and solar panels.  Wind power is seen across the globe as being one of the most promising technologies, with ample room for improvement to the systems.  Aggressive government programs in nations across the world have pushed wind and solar energy to evolve at a far faster rate than ever expected, and the rollout of new wind turbines in all of these countries is seeing exponential growth.  Along with the installation of every new wind turbine comes the risk of that turbine being struck by lightning and seriously damaged.  Lightning protection for wind turbines has become one of the most challenging and yet important aspects of the future of green energy. 

 

Wind turbines are unique structures, being mostly made of metal and generally situated as the tallest structure in a region.  They are difficult to protect using the conventional surge protection methods, and many times will be sacrificed after a single surge instance.  Wind towers can easily be more than 150 meters in height and located on high ground in remote areas which are exposed to the elements.  The most exposed of the components within a wind turbine are the blades and nacelle, and due to their being constructed from composite materials, are generally unable to sustain a direct lightning strike without significant damage.  The lightning strike often happens to the blades, creating a situation where a significant power surge travels throughout the turbine structure and impacts all of the components within the windturbine itself.  It can also spread to the electrically-connected areas nearby as well, and do to poor earthing conditions that are present, most wind power setups will very often see significant damage as a result of a single strike and surge. 

 

Electronics and bearings are very susceptible to lightning damage, and maintenance costs are high due to the difficulties associated with component replacement.  Improving this statistical average of necessary component replacement is seen by many as the most viable method of technologically improving the wind power systems to remain online and functional for longer periods of time. Additionally, driving down production costs by eliminating maintenance and field maintenance calls as much as possible is also positive.  This plan falls squarely in the lap of surge protection systems which are designed to isolate damage as much as possible to the strike point and eliminate the subsequent damage because of the surge.  As better surge protection devices are integrated into wind farms worldwide, we will see both the driving down of costs as well as improved volumes of energy production over time.