Click to Enlarge

The Yokogawa WT1800 precision power analyzer is the latest addition to the company’s highly successful range of digital power measuring instruments.

Replacing the WT1600, an industry standard for many years, the WT1800 offers innovative measurement functions that provide the engineer with electrical power and efficiency measurements across applications ranging from inverter and drive design to alternative energy systems.

The WT1800 is capable of performing up to six power input measurements, which makes it possible to carry out efficiency tests between the input and output of products such as inverters. With its high-resolution 8.4-inch XGA display, the instrument is simple to set up and displays up to 12 different pages of measurement items in formats such as numeric, waveforms and trends. A vector display is available for voltage and current phase analysis.

Many of today’s power conversion circuits use energy-saving switching techniques which can cause highly distorted voltage or current waveforms with high harmonic content. To measure these waveforms accurately, the WT1800 uses high-resolution 16-bit analogue-digital converters with a digitizing rate of 2 MS/s (megasamples per second).

The WT1800 has a power measurement bandwidth from DC and 0.1 Hz to 1 MHz. Basic power measurement accuracy is 0.1 per cent of reading plus 0.05 per cent of range.

For electric motor testing applications, the WT1800 offers a unique and powerful motor evaluation function that offers, in a single unit, measurements of all the relevant electrical power parameters along with rotational speed, torque, mechanical power, synchronous speed, slip, motor efficiency and total system efficiency.

In addition, A-phase, B-phase and Z-phase input terminals have been added for advanced motor analysis. These signals make it possible to detect the rotational direction of the motor as well as the electrical angle measured using the Z-phase signal.

A new programmable digital filter function enhances the capability to remove unnecessary harmonic components and noise superimposed on signals such as from an inverter or variable-speed motor drive. This filter can be set independently for each input element, from 100 Hz to 100 kHz in 100 Hz increments. An analogue filter is also provided for 300 kHz and 1 MHz filtering on each input element.

Harmonic analysis can be carried out up to the 500th order from a 50 or 60 Hz fundamental frequency. This facility is especially important for measurements on new power conversion and power electronics devices.

An industry-first dual harmonic measurement function makes it possible to simultaneously measure the harmonic content and perform harmonic analysis on two different sources, such as the input and output of an inverter, variable-speed motor drive, lighting ballast, uninterruptible power supply or similar devices. The normal power parameters and harmonic data are measured simultaneously, providing for faster and more accurate power analysis.

For photovoltaic power generation applications, a maximum peak power tracking measurement is available to maximize the harvested power generated by photovoltaic cells. To accomplish this, the WT1800 is capable of measuring voltage, current and power peak values and calculating the derived parameters.

A power integration function is also available which can be used to measure the amount of power sold or purchased in grid interconnection applications.

The WT1800 features Yokogawa’s average active power function, making it possible to measure power consumption under conditions where the power fluctuates greatly. 


LM Wind Power and Alstom enter partnership to develop the world’s longest wind turbine blades for offshore wind turbines

LM Wind Power and Alstom have entered a strategic partnership to develop the longest wind turbine blade ever produced, designed to fit Alstom’s new 6 MW wind turbine for the growing European offshore wind market.

This groundbreaking blade will require more than 20 000 hours of work from LM Wind Power’s specialist teams focused on its aerodynamics, structural design and production processes.

The best in class design is to be specifically tailored for Alstom’s new 6 MW wind turbine and based on LM Wind Power’s proprietary profile, developed in its Danish wind tunnel.

Advanced materials will enable LM Wind Power to design and manufacture glassfibre and polyester blades that will be exceptionally light for their length. The prototype blades will be produced in the company’s Danish factory in Lunderskov, where the LM 61.5P2 is currently made, and will be ready for installation at Alstom prototype sites in Europe over the winter 2011–2012.

Future production depends on the end markets that Alstom wishes to address, most likely France, UK and other North Sea markets.

“We are proud to partner with Alstom on this important project,” said Roland Sundén, chief executive officer, LM Wind Power Group.

“I am sure that Alstom’s turbines flying the world’s longest wind turbine blades from LM Wind Power will set a new standard for cost of energy with an advantage over current offshore turbines.” 


Babcock wins four radiometric services contracts at Sellafield

Click to Enlarge

Babcock has landed four multi-million pound contracts to supply radiometric services support at Sellafield, with the firm winning all four bids that it submitted.

The total value of the contracts over their lifetime is estimated at £86m ($138m). Under the four contracts, Babcock will be providing nuclear material assay (NMA) maintenance delivery and support; maintenance delivery and workshop repairs for installed and portable radiological protection instrumentation (IRPI and PRPI); calibration and repair of maintenance and test equipment (MTE); and specialist technical and consultancy support to Sellafield for ad-hoc specialist measurements.

In delivering these services, Babcock will be supplying critical skills and expertise required, both to ensure safety compliance to maintain ongoing operations across the site, and to provide a maintenance and obsolescence management programme for a number of critical assets.

Babcock managing director for nuclear, Roger Hardy, said: “We are delighted to have secured these contracts, which allow Babcock to contribute to Sellafield Ltd’s overall strategy objectives to attract the most capable suppliers at the best value to deliver efficient solutions, as well as driving innovation and improved performance.”

The NMA, RPI and MTE contracts are awarded for a duration of up to 12 years, a significant increase on the three-year contracts which were held by Babcock and expired in March. The specialist measurements contract is awarded as a four-year framework agreement. 


Global Marine Systems picks Seatronics as distributor for its Predator ROV in the UAE, Gulf of Mexico, Norway and Brazil 

Global Marine Systems (GMS) has announced that Seatronics, a supplier of electronic subsea equipment to the hydrographic, environmental, geophysical, metocean, remote operated vehicles (ROV) and diving industries will distribute its 300 metre-rated, inspection class ROV system ‘Predator’.

Based in Scotland, Seatronics is the latest in a line of international distributors for Global Marine’s state-of-the-art, portable ROV and it will rent the Predator out to customers in the UAE, Gulf of Mexico, Norway and Brazil.

“Expanding the Predator ROV in these strategic locations is the next step in expanding our global reach and advancing our position as the leading player in the subsea robotics industry,” said Ray Ward, business development manager, Subsea Services, GMS.

Global Marine’s Predator is designed and manufactured at the company’s Portland facility in Dorset in the United Kingdom. A state-of-the-art portable system, built using cutting-edge technology, the Predator was developed to serve demanding markets for rugged and reliable underwater viewing and survey systems.

“The Predator is designed to support multiple-choice add-ons which will enable our customers to have a near-customized experience,” said David Currie, managing director, Seatronics.

The Predator uses the latest high-reliability technology designs for maximum operating efficiency in shallow-water inspection and surveying jobs for the full spectrum of subsea and underwater industries, and was built by subsea engineers with practical, hands-on experience. 


Converteam’s Hydrogenie superconducting hydropower generator completes landmark testing at hydro plant 

Power conversion specialist Converteam has announced that it has successfully completed static testing of essential elements of its Hydrogenie generator.

Hydrogenie, thought to be the world’s first high temperature superconducting (HTS) hydro generator for a commercial installation, is being manufactured by Converteam as part of a European Union (EU) part-funded project and will be installed at the Hirschaid run-of-river hydroelectric power plant in Bavaria, Germany, which is owned and operated by E.ON Wasserkraft.

This new breed of generator makes use of high temperature superconducting (HTS) materials instead of traditional materials such as copper. Hydrogenie promises a step change in generator efficiency together with size and weight reductions of up to 70 per cent from a conventional solution.

Hydrogenie could make run-of-river and other hydro power plants an increasingly viable source of clean, green power and the technology is also transferable to the wind power industry.

The electrical resistance of superconducting materials drops suddenly to zero when the conductor is cooled to or below its critical temperature, whereas conventional materials such as copper exhibit a gradual decrease in resistance but always retain some of their resistive qualities.

The critical temperature at which superconducting qualities are exhibited is a key factor in the evolution of Hydrogenie as a commercially viable generator. The earliest observations of superconductors (i.e. mercury) required cooling to 4 K (-269 ºC) whereas today’s commercially available superconductors can, depending on the application, operate in relatively balmy temperatures in excess of 50K, hence giving rise to the term ‘high temperature superconductor’.

“The recent critical milestone in the testing of Hydrogenie was the successful passing of current (in this case 70 A) through the rotor coils when they were cooled to below the superconducting transition temperature,” said Derek Grieve, director technology at Converteam.

“This was achieved with only half the defined cooling power applied to the coils, and confirms the thermal and electrical design of the coils, cooling and insulation systems. Hydrogenie looks set to change the fundamental economics of the renewable energy industry with generator efficiency reaching up to 99 per cent.”

Converteam’s partners in the Hydrogenie project are: E.ON Wasserkraft, which is providing the Hirschaid test site; Zenergy Power GmbH, which manufactures the HTS coils; Stirling Cryogenics BV, which supplies the coolers and rotating interface.

Vector Fields, Cobham Technical Services, KEMA and the Silesian University of Technology have provided analysis tools and testing support. Final commissioning of the 1.7 MW Hydrogenie generator is scheduled for summer 2011. 


Terex launches CTT 321 flat top tower crane with a 300 tonne load moment and maximum lifting capacity of 16 tonnes 

Click to Enlarge

Terex Cranes has launched the Terex CTT 321 flat top tower crane, the latest 300 tonne addition to the company’s extensive flat top tower crane offering.

The new Terex CTT 321 is produced at the company’s facilities in Fontanafredda, Italy, and represents “a step forward in flat top tower crane innovation,” said Angelo Cosmo, manager product marketing, tower cranes.

“It offers advantages of simplified installation, transportation and maintenance in conjunction with excellent performance. The new operator cab and innovative options are tailored to match customers’ productivity expectations in the construction sector.”

Combining compact design of the upper part with a 300 tonne load moment, the Terex CTT 321 provides a maximum lifting capacity of 16 tonnes and a maximum jib length of 75 metres. The main jib is adjustable at 5 metre intervals from 30 to 75 metres. Designed for easy installation and equipped with an optional anti-collision and zoning system, the new CTT 321 features a two-part counter jib to facilitate easy transportation. Transportable at a maximum length of 8.7 metres, the counter jib can be mounted from the ground comfortably using the pins provided for jib assembly.

The new EVO15 operator cab on the CTT 321 provides operators with the excellent visibility they require to perform their job safely. The EVO15 cab also provides crane operators with a comfortable working environment comprised of a full colour, anti-reflection, multi-language ICS display monitor, a new ergonomic joystick, and heating system that allows the operator to remain focused on the job. Another feature of the cab is a CD/radio. The cabin platform is pre-assembled for quick setup at the jobsite.

This new model comes equipped with an anti-sway module, a slip-ring protection bar and rods, and jib safety rope to protect technicians from falls when working at height. A trolley device has also been introduced to prevent the pulley rope from jumping the reeving track.

The inside cabin panel is equipped with new features and can be easily opened for maintenance. All electrical boxes are made from stainless steel for durability. Maintenance and spare parts management are monitored by an intelligent diagnostic system. 

More Power Engineering International Issue Articles
Power Engineering International Archives
View Power Generation Articles on PennEnergy.com