Power & Energy Solutions

The premier renewable energy publication

As we move towards net zero carbon emissions targets, significant efforts to connect more clean energy resources to the grid are being made. Globally, the energy industry is welcoming innovations in renewable energy and Distributed Energy Resource (DER) assets. As a result, correctly managing and distributing the energy from these DER assets to enable the most efficient, clean and smart energy system is a big focus for system operators, utilities and asset owners alike. Big strides have been made already in the capabilities of energy storage and distribution networks, with major projects testing long-term battery models. A recent study by Wood Mackenzie revealed that it is expected that cumulative capacity of distributed storage and solar in North America, Europe and Oceania will double by 2025. Similar predictions were made by The International Renewable Energy Agency (IRENA) who project that the onshore wind capacity growth rate will quadruple to more than 200 GW added annually by 2040. Renewables by nature are intermittent. The sun does not always shine and the wind does not always blow. Add to that, the current uncertainty over the long-term implications of the Covid-19 pandemic and subsequent lockdowns and economic changes on electricity demand, there are many

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Wind industry business models are shifting their focus. They used to be mainly driven by financial aspects of the business plan and the debt used to finance it, while technical operations, often subcontracted, came in second place. The priority of the wind industry was to ensure robust turbines with a high degree of availability, with performance being considered secondary. This happened mainly for three reasons: 1. High electricity resale prices were guaranteeing comfortable margins. 2. Technical skills were not always available or easy to acquire by the owners and asset managers 3. Digital data was of poor quality, often difficult to use because it was controlled by the turbine manufacturers. The gradual disappearance of feed-in tariffs and the implementation of reverse auction systems are giving the market a different dynamic, with the main consequence being a significant drop in the resale price of electricity. Average prices have decreased by 50% in the last 8 years, directly impacting the wind farms Return On Investment (ROI). Nevertheless, this drop in the price of electricity is an excellent opportunity for the industry, as it makes wind energy more competitive within the energy mix. The influx of capital has been unstoppable, and has even led to a

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PES Wind caught up with Ed Hall, President of Oxifree, to discover the latest corrosion solutions. Our readers have always been interested in this sector, as it has a real impact on maintenance and life span of the wind turbines. Research and development are at the forefront. The core product encapsulates the part, rather than sticking to it, which lends itself to many different possibilities. Read on to find out more… PES: A warm welcome to PES Wind Ed, it’s good to talk with you. Would you like to begin by giving us an overview of Oxifree? Ed Hall: Thank you for having me! Well, in short Oxifree offers anti corrosion solutions for complex metal assets. Our core product is TM198, which is a thermoplastic coating melted down from a solid resin, in the supply unit and applied using a heated hose and gun. The coating requires minimal surface preparation and can often be applied to live equipment since it does not depend on adhesion but instead encapsulates the asset. The built-in corrosion inhibitor actively protects the metal structure preventing the ingress of air and moisture. It is a versatile product and has potential to bring major savings to infrastructure

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Before considering the impact that condition monitoring systems (CMS) have on our industry, it is important to first establish what CMS entails and how it came to be such an established piece of hardware in the renewable energy sector. A condition monitoring system would normally comprise of a series of sensors strategically placed on fundamental components to sense the state of this component relative to a known benchmark or healthy state. These sensors send signals to a piece of hardware or circuitry for processing and distribution. A condition monitoring system can be described as analogous to the human nervous system. Our nerves detect when something is not normal, normally through the perception of pain and the nervous system relays this message to the brain. The brain then decides on the best approach to protecting the body from this source of pain. In this same way, our condition monitoring sensors, based on some pre-programmed parameters on acceptable, detects when something moves away from this, sends a signal to a motherboard which will make a decision on how to protect a component, normally via raising an alarm, or in an extreme case, shut down of an electrical component. In the wind industry

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Miros is a technology company that specialises in measuring the ocean surface. With over 35 years of experience engineering dry-mounted, radar-based sensors robust enough to weather the harsh and unpredictable conditions of the North Sea, the company develops innovative solutions for real-time, local environmental monitoring for the global offshore and maritime industry. By making essential data available to all relevant stakeholders, Miros continues to develop its long track record of enhancing the safety, performance, and efficiency of offshore operations worldwide, including those related to both floating and fixed offshore wind installations. In the run up to their latest series of webinars for the offshore wind market, Miros’ renewables lead and former offshore wind underwriter, Robert Bates, was joined by veteran offshore operations specialist, Andy Readyhough, for a conversation about risk allocation, contract disputes and the shifting sands of offshore wind insurance. Robert Bates: When it comes to claims in offshore wind, we know that significant wave height (Hs), waiting on weather, and standby charges play a major role, but exactly how big of an issue are the related contractual disputes between contractors and their employers? Andy Readyhough: It depends where the risk lies within the contractual structure. At the moment, developers likely have

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MHO-Co is on a mission towards a greener and more economically viable service to the offshore industry. And the future is already here. Right now, the Danish shipping company is building the world’s first hybrid CTVs which are to be introduced in 2021. And they hope to take the technology even further with support from EU funds. With eyes set on the future and a vision to create an environmentally friendly way of business MHO-Co has designed two new hybrid catamarans with modern electric motors reducing weight, space and emission for the benefit of the environment as well as fuel economy in the offshore wind industry. ‘Designing and building hybrid crew transfer vessels is a huge step in the environmental direction, and I am proud that we have found partners who share our vision for sustainable development in the offshore industry. With these new vessels we offer the largest, most reliable, and sustainable CTVs in the world,’ says CEO and founder of MHO-Co, Mik Henriksen. Creating a ship that is the first in the world of its kind is a very special process. And of course, Mik Henriksen, who designed the twin vessels in cooperation with Incat Crowther, wants to follow

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Mainprize Offshore has operated in the North Sea for over thirty years, and the family behind the company has a fishing heritage that dates back generations. This team has extensive experience in the offshore oil and gas industries, and has been going from strength to strength since entering the offshore renewables sector in 2012. Mainprize Offshore’s radical multi-purpose CTV designs have been met with strong demand. They’ve taken delivery of eight vessels since 2012, with a further three being built and plans to expand the fleet even further. As well as achieving an impressive fifteen industry firsts, Mainprize Offshore’s vessels are also notable for features including fuel and water pump speeds, transit speeds in adverse weather and their deck space of 200m. All this makes the fleet really versatile, saving clients the costs of bringing in other vessels when they need to undertake scopes of work that are beyond the capabilities of a standard crew transfer vessel.

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Liftket‘s CEO Jürgen Dlugi, tells PES about the company’s expansion in the wind industry. In 1953 they started off by supplying electric chain hoists and are now able to offer a complete service crane globally, suitable for on and offshore work. Well aware of safety needs, they provide full training and tailor made packages to meet their clients’ needs on request. PES: A warm welcome to PES Wind, it’s good to talk with you. Would you like to begin by giving us an overview of LIFTKET? Jürgen Dlugi: We are one of the largest and oldest manufacturers of electric chain hoists worldwide, with loads ranging from 125 kg to 25,000 kg. Founded in 1948 by D. Hoffmann, the company initially developed agricultural equipment, before specializing in electric chain hoists from 1953. Hoffmann’s innovations, namely the horizontal assembly of both motor and gearbox and the patented safety-brake/clutch system, set the standard for electric chain hoists. A uniquely high level of vertical integration enables us to be flexible for our customers. In combination with our unique structure, we can offer a very comprehensive range of products, from series production to custom-made products.

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As market demand for wind turbines has grown, so too have the demands for quality and performance, in order to reduce the levelized cost of energy (LCoE) and demonstrate that the technology is not just a clean solution for electric power generation, it is also a profitable addition to the energy mix. This is especially the case for critical components such as power converters because the performance of the whole turbine depends on them. The response is focused on increasing the reliability and durability of these components, making wind turbines more economically viable assets. High quality design and extended validation methods of power converters are key to guaranteeing the reliability and durability of the turbines in wind farms facing the toughest operating conditions. Ingeteam’s new-generation power converters have been validated using the toughest test scenarios and most realistic configurations, to prove in advance that the converter will be properly integrated within the turbine and operate correctly under the most demanding situations. The market demands continuous performance improvement and regulatory innovations take this factor into account. Ingeteam participates in the committees which issue these requirements and integrates the latest regulatory developments at the design phase of the company’s new generation power

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The electric energy industry has long been a conservative business taking very deliberate and measured steps in adopting new technologies. The renewable energy markets have forced companies to adapt to a fast-paced and rapid technology development cycle. The exponential growth and the demand for more power in a smaller envelope continue to drive rapid development. H-J has accepted these challenges and we are leading the renewable energy transformer industry with material and product development for both high and low voltage bushing applications. New, higher power solar inverters and wind turbines are being developed and released on a regular basis. This is driving a series of fundamental changes in transformers for renewable applications: • Solar inverter containers are open and exposed to elements, • Converting from dry-type to liquid-filled transformers, • Using high-temperature insulation systems and operating temperatures, and • Increasing current ratings and the high voltages to 35 kV, 200 kV BIL class and beyond. At H-J, we are dedicated to developing industry-leading bushing solutions by listening to our customers. Solutions for high voltage bushings include plug-in type technology for 38 kV class with 150 and 200 kV BIL options. Bushings are available with 600, 900 and 1200 A continuous current

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