Mergers and acquisitions may have sharply reduced the number of wind-turbine makers in recent years, but the competition is no less intense for that.
The new wave of 4-5MW onshore turbines launched by most of the leading OEMs is probably the clearest reflection of where the industry is heading, but the key design drivers of 2018 were lowering LCOE using (compact) modular design, digitalisation, bigger rotors, global supply chains and reduced upkeep.
Classes and criteria
Our categories are unchanged from last year. Turbines are judged in three classes: up to 2.9MW and 3MW-plus for onshore machines, with a separate class for offshore hardware.
There are also awards for drivetrains, rotor blades and innovations.
Turbines need to have been made available for commercial order over the past 12 months, with at least one prototype installed and operating, to qualify for a Windpower Monthly award.
Working prototypes are also required for the blade and drivetrain classes.
Eyecatching technology is only part of our criteria.
We also aim to recognise the more routine requirements of wind-energy generators, including the quality of the product’s design and manufacture, its track record, order backlog, specific characteristics, and the ease with which it can be produced, transported, installed and operated.
As always, a key question is: how does the product contribute to speeding up the energy transition, and at the lowest possible carbon footprint and LCOE?
Missing in action
We depend heavily on the cooperation of the industry’s OEMs and main component suppliers in our selection, specifically in terms of information about the number of units sold, the size of the order book, and technical details on new machinery.
The overwhelming majority of companies have been happy to help, and we thank them for their contributions.
Regrettably, GE has declined to disclose much of this information, claiming it to be confidential. For this reason, we have been unable to include a number of GE’s products in this year’s selection.
KEY TO TABLES
C&GFRE - carbon and glass-fibre reinforced epoxy
DD - direct drive
DFIG - doubly fed induction generator
EESG - electrically excited synchronous generator
GFRE- glass-fibre reinforced expoxy
HH - hub height
HSG- high-speed geared
IG - induction generator
MSG - medium-speed geared
OEM - original equipment manufacturer
PCVS - pitch-controlled variable-speed
XXX - choice in generators
IEC - class site ratings I, IIA, IIIB etc (high, medium and low wond in descending order; A-C is turbulence intensity in descending order; S meets special conditions outside class requirements)
ONSHORE TURBINES UP TO 2.9MW
The high-volume sector of the wind-energy market, where competition over cost, specification, and ease of transport and installation is at its most intense
GOLD Envision EN141-2.5
ONSHORE TURBINES 3MW-PLUS
The focus of rapid product development in recent years as OEMs push to 5MW and beyond
GOLD Nordex N149/4.0-4.5MW
Ratings and rotors continue to grow as the offshore sector goes global
GOLD SGRE 8.0-167 DD
Sector adapating to higher-rated turbines and changing grid demands
GOLD EcoSwing superconductor
Balancing transport and installation logistics with the requirement for bigger rotors
GOLD Vestas V120 rotor blade
Best of the year’s brightest ideas for enhancing wind energy
GOLD Spitnzer Engineers Blancair