Finding the Best Solution for a 5MW Wind Turbine
Rain Byars, EWEA Offshore Wind Conference, November 2011
This paper focuses on two main components of the power system assessment. First, the choice of generator type is examined, with focus on the two most popular and available generator types for wind turbines: Doubly Fed (DFIG) and Permanent Magnet (PMG). Second, the system voltage is assessed, to identify the optimum configuration for a balance between all design requirements.
Rain Byars co-author, AWEA Windpower Conference, June 2006
Multi Variable Turbine Controls (MVTC) presents the potential for significant improvements in cost, performance and reliability for future WTGs benefiting both the onshore and offshore markets. The use of MVTC requires a stable and cost effective measurement input from load sensors during operation of WTG. In addition to the performance requirements, the system must be reliable for the lifetime of the turbine, cost effective for volume deployment, and the system must not interfere or degrade the turbines’ components or operation in any way.
A Comparison of Doubly Fed and Permanent Magnet Generators for Wind Turbines
Rain Byars, AWEA Offshore Wind Conference, October 2011
For a multi-megawatt offshore wind turbine, a permanent magnet generator is a clear choice for optimizing all factors affecting the cost of energy of the installed turbine. The advantages include increased power capture and high system reliability. Medium voltage power system configuration presents many technical advantages such as
lower weight and increased efficiency, however uncertainty regarding lifetime costs and reliability are considered prohibitive in the context of this study.
Utilizing Masurments from Fibre Optical Load Sensors to Adjust Individual Blade Angle
Integrated into an Electromechanical Pitch System
Rain Byars co-author, DEWEK, 2006
Individual blade pitch control utilizing rotor load feedback presents the potential for significant improvements in cost, performance and reliability for future WTGs benefiting both the onshore and offshore markets. This type of control requires a stable and cost effective measurement input from load sensors during operation of WTG.
Rain Byars co-author, European Wind Energy Conference, February 2006
Fibre optical sensors (FOS) are useful for a variety of turbine control and protection functions. Online load measurements of offshore wind turbine foundations throughout the turbine lifetime allow structural load monitoring and residual life time estimation. Based on the data the overall system performance can be optimised, and in the event of failure the data can be used for a meaningful root cause analysis.
Published Papers and Articles
How to Build Tomorrow's 12MW Wind Turbine With Components Available Today
William Miller and Rain Byars, WindTech International, July 2012
The 5 to 7MW range turbine is the upper end of what you can achieve by enlarging megawatt-scale architecture, but it is an awkward size range. The weights are high, the installation equipment is not commonly available and the cost of energy is not on a par with 1 to 3MW onshore installations. The question is how can we upscale beyond this awkward limit, and bring costs back down? The Nextwind Gaia architecture overcomes the barriers to upsizing existing wind turbine technologies, and aims to make possible large-scale offshore wind plants which will beat the initial cost, and cost of energy, of land-based wind farms.
Rain Byars co-author, European Wind Energy Conference, 2007
In this paper we present an FOS load measurement system that meets these requirements and has been successfully demonstrated to fulfill the acceptance criteria for advanced control inputs. Fiber Optical Sensors (FOS) have been tested successfully in composite blades on wind turbine generators (WTG), showing their capability to perform under both laboratory and field conditions.