Colin E. J. Bowler


Graduated in 1966 with a BS in Electrical Engineering from University of Aston in Birmingham UK. He also received an ME degree from Rensselaer Polytechnic Institute awarded in 1970.


From 1967 to 1994 he was employed by General Electric as a Generator Engineer, and Power Systems Engineer specializing in turbine-generator reliability concerns from power system operations.


From 1994 to 2002 he worked for ABB US T&D as an R&D Consultant in Power Systems and as principle developer of DSP based Power Electronic controls for Medium Voltage Static-Switches and Reactive Compensation Systems.


Technology Contributions:


Discovered the SSR Torsional Interaction Phenomena and developed state-space modeling computer simulation for the turbine-generator and network for evaluating torsional stability margin.


Developed comprehensive SSR mitigation, control, and protection equipment and applied on nine Western-Area turbine-generators.


Developed and applied Monte-Carlo computer simulation methods for evaluating transmission-breaker reclosing practices, to establish the reliability effect on turbine-generator operation.


Developed a high-speed SSR protection and monitoring system, providing secure and dependable protection of turbine-generators from transient resonance phenomena.


Developed a new concept synchronous-phasor measurement system, with very high bandwidth, suitable for control and monitoring of wide-area power-system disturbances.


Mr. Bowler is currently President of Instrumentation Technology Inc. a provider of DSP based SSR Protection Systems, and DFR and PMU monitoring and control systems for wide-area system dynamic performance. Mr. Bowler is a member of IEEE and has authored/coauthored many papers on SSR, Turbine-Generator Torsional Interactions, FACTS and System Dynamic Performance.


John Tarnawski:


Mr. Tarnawski is currently a Vice-President with Instrumentation Technology Inc. responsible for instrumentation design.


From 1970 to 1975 he was employed by Dudley Observatory responsible for instrumentation payload-integration for scientific evaluation of micro-meteorites on Skylab, and with Rocket and high altitude balloon deployment.


From 1975 to 1983 he was a Design Engineer with Instructional Industries responsible for electromechanical, analog and digital circuit design of educational products, including design, test, documentation, field installation and support.


From 1983 to 1991 he was employed as a Product Engineer by Relay Testing Systems responsible for the design of automated test equipment (ATE) on Multibus based microprocessor instrumentation systems. Design responsibility included circuit and package design for electronic, thermal and mechanical integrity.


From 1991 to 1996 he joined General Electric Power Systems as a Technical Specialist responsible for the design, test, field installation, and support of Series Capacitor Transmission Compensation Systems. Projects included PG&E, WAPA, BPA, SSPB, and Hydro Quebec. During this time he also designed the electronics for various digital signal processing (DSP) based systems for evaluating response of Steam and Gas Turbine Generators.


From 1996 to 2002 he was a Consulting R&D Engineer for  ABB Power Systems responsible for the instrumentation and power electronic control design of DSP based Medium Voltage power quality systems including Static-Transfer switches, and Reactive compensation systems.