Power & Energy Solutions

The premier renewable energy publication

Driven by the accuracy requirements of the solar renewable energy industry, solar radiation measurement reaches the next level. Sensor technology is improving, user access to calibration is getting easier, practices for instrument maintenance and measurement uncertainty evaluation are now being standardised. Hukseflux Thermal Sensors, a technology leader in this field, is actively involved. The weakest link Until now, measurement of solar radiation has often been often the weakest link in PV system performance assessment. The equipment used for this, pyranometers, is an optical instrument. Their measurement uncertainty under perfect conditions is in the 2 to 3 % range. However, conditions at a solar power plant are frequently imperfect. A major error source is instrument fouling, for example by dew, frost, rain or dirt. The frequency of pyranometer maintenance is often low. To reduce the impact of fouling, cleaning is essential, but it may not be part of the standard maintenance program. Recalibration, the most common way of verifying the true performance of the instrument, may only happen from time to time. The overall result of this lack of cleaning and calibration is a much larger measurement uncertainty than that under perfect conditions; typically no better than 5 %.

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New multi-megawatt solar installations are growing rapidly, which is great news for the environment and the economy. With that growth comes falling prices, both for power purchase agreements (PPAs) and solar gear including PV modules, inverters and other equipment. But what about the people reading this article who got into large scale solar earlier in the game, with PV plants now between five and ten years old, or perhaps even older? How are your PV assets performing now? It’s quite likely there is significant untapped potential in those assets that could provide you increased returns on your existing portfolio by boosting yield and decreasing operating costs. There is sound science behind how you can do so, the application of which will have some very significant economic benefits. Turning your central inverter into a string inverter One of the great debates in the solar industry at the moment is the one over central versus string inverters. Settling this debate is beyond the scope of this article. What is in the scope of this article is explaining that one of the arguments string inverter advocates make in favor of their application is their more granular maximum power point tracking or MPPT. For those unfamiliar with

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Six years ago, ZF Wind Power took the challenge to set the benchmark in the industry pioneering wind gearboxes to power the new giants of the sea. The project started with an early cooperation between the customer and ZF with one main focus: reliability. Dr. Dirk Strasser, Manager Wind Gearbox Design at ZF Wind Power, Witten, shares his reflections with PES, on the project from an engineering perspective and points out the resultant benefit for the customer.. Development projects for the wind industry usually are characterised by short development times and gearboxes developed to specification. The 8 MW development started with a different focus. A reliable drivetrain at competitive costs was the objective, with reliability being recognised as one of the most important contributors to the turbine’s competitiveness. Before starting detail design, ZF cooperated closely with the customer in order to cover all gearbox requirements in the interface specifications. This means, on the one hand, a sound mechanical design on the rotor side, delivering a mechanical torque of minimum 8,000 kNm whilst keeping parasitic loads small, and on the other hand, meeting mechanical and electrical requirements on the generator side prescribed by the integrated drivetrain layout.

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Words: Al Maiorino It seems the US is finally being blown away with the idea of wind power. At last traditional forms of energy are being reviewed and clean, sustainable wind energy is being taken seriously. There is to be a 200 turbine windfarm off the coast of Long Island. “Today is a big day for clean energy in New York and our nation. Governor Cuomo has set a bold vision for a clean energy future, and this project is a significant step toward making that a reality. The South Fork Wind Farm will be the second offshore wind farm in America, and it’s largest. There is a huge clean energy resource blowing off our coastline just over the horizon, and it is time to tap into this unlimited resource to power our communities.” said Deepwater Wind CEO, Jeffrey Grybowski, in an empowering speech following the approval of a revolutionary project. In light of much discussion over climate change, it has become imperative to reassess conventional forms of energy sources such as fossil fuels and make changes. There is a need to provide energy that is replenished naturally, offers climate change mitigation, and adds economic benefits on various levels. In response

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PES invited award-winning Scottish technology company PhotoSynergy Ltd (PSL) to give us an insight in to their suite of new products, produced in response to industry led requests to find practicable, cost-effective solutions in a variety of sectors where safety of life is paramount. The company, in collaboration with a number of key technology partners, continues its focus on increased safety and productivity through innovative forms of illumination based broadly on its ground-breaking LIGHTPATH™ technology, a fibre lighting system offering an innovative technical solution. In January this year, PSL and Livingston-based WFS Technologies launched the Seatooth LIGHTPATH™, an on-demand wireless ribbon lighting system designed to revolutionise diver safety and efficiency in remote subsea locations. The system is a combination of two advanced technologies – WFS’s Seatooth, a subsea wireless communication system that can download and log information gathered on subsea installations remotely and PSL’s LIGHTPATH™, a side-emitting flexible fibre that projects a continuous line of light that carries no electrical power – and works for both diver and ROV operators, working either near surface, or at depths of up to 3,000m. The light is engaged automatically when the diver or the ROV comes within 5m of a structure, and provides

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Words: Gerry Lalonde, CEO, Orenda Energy Solutions. Planning consent is still grey area for the small/medium wind turbine market and it is about time we had consistency and predictability rather than disparate decision making that often blights and inhibits progress across the UK. It has been known for years that planning authorities decision making varies depending on location and geography which might make anyone but the most determined user look at other renewable schemes that offer an easier pathway to energy self-sufficiency, when wind energy ticks many boxes in terms of its appeal – grid friendly with no grid structure required, unobtrusive, as well as offering revenue and investment opportunities. In my view, that’s why we need to shake off the planning shackles because, as the energy industry in the UK continues to evolve, small/medium wind can be pivotal as the ‘driver’ as the scheme of choice particularly for farmers and private landowners. Turbines at this level, around the sub-50kW mark, are vital to maintain this continuous drive to underpin the UK’s small-scale renewable needs. Even the Chief Executive of the National Grid, Steve Holliday, was on record in a recent interview stating that ‘’by 2020 small-scale, distributed generation will represent a third

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In February 2015, the Indian government announced its plans to almost quadruple its renewable power capacity to 175 GW by 2022 as part of the plan to supply electricity to every household in the country. This includes 60 GW from wind energy. Further, India made a commitment at COP21 to raise the share of non-fossil-fuel power capacity in the country’s power mix to 40% by 2030. Consequently, these plans and targets make the Indian market a unique fast moving and growing market where competitive companies can have great business opportunities. But, they also come with a complex and unstable legal framework where manufacturers find many obstacles on the way. Market developments In 2016, India set a national record with 3,612 MW of new installations, bringing the country’s total to 28,700 MW and consolidating its 4th position in the cumulative global rankings, according to the Ministry of New and Renewable Energy (MNRE) of India. India was among the top 10 countries in terms of renewable energy investment, according to UNEP & Bloomberg New Energy Finance. Also, India’s renewable energy sector held its position at the third spot for the second year in a row in the Renewable Energy Country Attractiveness Index (RECAI) released by

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The world of high-pressure hydraulics is constantly in motion. Within this dynamic the Dutch hydraulics specialist Holmatro is continuously developing high-quality solutions for industrial applications. After more than 50 years’ experience as a supplier to the shipbuilding and oil & gas industries, Holmatro developed the first TP levelling set in 2009, used in the construction of the Belgian offshore wind farm Belwind. The set proved to be so successful that they were also used during the construction of subsequent offshore wind farm projects, such as Walney, London Array, Westermost Rough, Dudgeon and many more. Since the introduction of the TP levelling set in 2009, Holmatro has significantly expanded its product range for offshore wind applications. Besides hydraulic solutions to level wind turbine foundations, the company has proven itself in the field of TP fixation, jacket fixation, cutting applications, seafastening equipment and skidding solutions. Holmatro tools are also used for the lifting, weighing and levelling of offshore platforms, the calibration of tension-leg platform (TLP) load cells and are integrated on pipe-laying vessels to support heavy lifting and moving applications. Wind turbine foundations consist of two large steel structures: a monopile (MP) that is driven into the seabed and a transition piece (TP) that

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The American Wind Energy Association is heading back to the U.S. which has championed the wind energy industry for decades for WINDPOWER®. PES brings you the latest information on this unmissable event. If you are invested in U.S. wind energy or looking to enter the market, AWEA WINDPOWER 2017 Conference & Exhibition is the place you need to be. It is where professionals from across the globe find top-tier speakers, world-class education, cutting edge technology, and premium networking. This complete conference experience cannot be found anywhere else. Attend WINDPOWER is mainstream. WINDPOWER is big league, and AWEA WINDPOWER Conference & Exhibition is where new opportunities are waiting to be discovered. By meeting face-to-face with thousands of industry professionals, developing relationships with leading wind energy companies, exploring potential with new or growing small businesses, and participating in forward-thinking sessions, you will find anyhting you need at the largest annual conference for the U.S. wind energy industry. Join over 7,000 wind industry professionals May 22-25 in Anaheim, California at the largest annual wind energy conference in North America. Given the industry’s growth in 2016, AWEA expects this year’s event to be another significant opportunity for garnering relationships and developing business.

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The renewables market, particularly wind, is a key sector for ALE. Building on experience in the power sector, we have used our knowledge and expertise to develop smarter solutions to the challenges created by the increasing heights of wind turbines and associated components. In relation to the on-shore wind enery market, ALE offers a bespoke Transport, Crane and Installation (TCI) package for the wind energy sector. The transportation phases of projects include route assessments, liaising with local authorities, providing specialist transportation equipment and facilitating the removal and replacement of any street furniture or structures that may obstruct the route. We own a fleet of specialised equipment that is specifically used for projects in this sector, such as ` blade trailers and low profile wind tower adapters. Our qualified electrical and mechanical installation teams have the knowledge and experience to provide the most efficient solution, on a project by project basis. We can also provide our clients with port handling services. This includes equipment inspection, damage assessment, storage facilities and loading or reloading of equipment to specialist transport. “We offer different types of cranes for the erection of wind turbine components. The LG1750 combines the benefits of a crawler crane, it is high

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