Janos Rajda
SatCon Power Systems

Wednesday, May 2, 2007, 6:00 p.m. – 8:00 p.m.
  6:00 Refreshments
  6:30 Presentation

Please contact Ehsan Behboudi, E-mail:
Indicate your full name and IEEE (if applicable) membership number. Space is limited and is first come first served to room capacity.
Everyone is welcome

Industry Applications Chapter
Signals & Computational Intelligence Joint Chapter (AESS)

With increasing demand for clean electricity generated from the low-impact and renewable energy resources wind turbines are quietly becoming the fastest growing power generating resource worldwide. Number of wind farms, ranging in size of few megawatts to hundreds of megawatts, is being proposed and developed. In parallel with this increasing generating power of wind farms the power of single wind turbine tends to increase too and lately it is approaching 5 megawatts in unit size.

Presently prevailing designs of multi-megawatt wind turbine power trains, including associated IGBT converter designs as enabling drive train components for turbine variable speed operation, will be presented. In particular, presentation will be focused on IGBT Converters for semi-direct drive trains based on following generator types:

• Doubly Fed Induction Generator (DFIG),
• Permanent Magnet Synchronous Generator (PMSG) and
• Squirrel Cage Induction Generator (SCIG).

Since the wind farms are often located in remote rural areas or lately even hundreds of miles offshore their connection to a transmission grid is often subject to meeting a set of interconnection standards or grid codes at the point of common coupling (PCC) with transmission grid in order to ensure efficient and secure operation of the wind farm power system. These interconnection requirements imply also a dynamic VAR compensation and a grid fault ride-through capability, either at the wind turbine level or at the wind farm substation level. Several innovative Silicon Controlled Rectifier (SCR) based medium voltage, static switchgear solutions or SCR SwitchGear designs of sub-cycle response capability for:

• Dynamic Wind VAR Management and for enabling
• Low-Voltage Ride Through (LVRT) of the wind generating plants, during balanced and unbalanced grid faults, will be also presented.

Janos Rajda is currently with SatCon Stationary Power Systems (former Inverpower Controls), an electrical power equipment design, build and service company that sells commercial and industrial power systems for distributed power generation and for critical facilities power quality protection. His responsibility includes application engineering, proposals development, competitive analysis and new product definition for industrial AC and DC power supply, for low-impact energy resource to utility grid interconnection and for whole-facility power quality/service reliability applications.

Janos’ experience spans from medium voltage variable frequency drive (MV VFD), static transfer switch (MV STS), static voltage regulator (MV SVR) and sub-megawatt fuel cell power conditioning system (PCS) product design and development to multi-megawatt, industrial power and whole-facility power quality systems application engineering and project management.

He received the B.S. (Dipl. Ing.) and M. Eng. degrees in Electrical Engineering from University of Zagreb and University of Toronto, in 1975 and 1992 respectively, and is granted several U.S. and PCT patents for innovative power equipment designs. He is a registered member of the Association of Professional Engineers of Ontario, Canada since 1994.