Former Projects of note :<\/p>\n\n\n\n
Parameter Derivation of Synchronous Machines.<\/strong><\/p>\n\n\n\n Using Stator and Rotor, Voltage and Current data logging during Load Rejections, along with a Power System Model to determine Machine Parameters (Reactances and Time Constants mostly) for the publication of Models to be used by Power System Operators.<\/p>\n\n\n\n Testing and data gathering and reduction capabilities were developed and System models were created in Matlab\/Simulink\/SimPower + Control SystemsToolboxes.<\/p>\n\n\n\n This produced the first Parameter Estimation by the GE Parts and Repair Services Group, not a part of the GE Power Systems Consultancy Group, the entity who had been usually required to perform this service.<\/p>\n\n\n\n 3D Model of Stator Bars<\/strong><\/p>\n\n\n\n A 3D Solidworks model built from the ground-up, accounting for the 3 or 4 major bends and the involute-on-the-cone section, as well as the on-the-cone or on-the-cylinder lead arrangement.<\/p>\n\n\n\n This coupled with a flexible spreadsheet, allowed for the reverse engineering of any imaginable stator bar.<\/p>\n\n\n\n This later proved its value on the first 3D bending\/shaping jig developed and constructed for the last set of Stator Bars GEESA produced, with considerable savings in time and materials.<\/p>\n\n\n\n No-Load Testing of Large Motors.<\/strong><\/p>\n\n\n\n The testing of large Motors is a rather challenging proposition, as large currents at large voltages are required (albeit at a rather low power factors).<\/p>\n\n\n\n The use of a Large Variac and a Multitap Transformer is usually specified, but due to incoming power supply limitations, this is sometimes difficult.<\/p>\n\n\n\n An alternative that was selected and later implemented was the use of a specially modified 1.25 MVA Diesel Generator, with field control thru the use of a DECS relay.<\/p>\n\n\n\n This allowed for testing of large synchronous motors, as well as the more usual Induction (Squirrel Cage and Wound Rotor) Motors.<\/p>\n\n\n\n Motors upwards of 8.0 MW have been successfully and safely started and test ran with this setup.<\/p>\n\n\n\n Complete 3D Model of a Synchronous Condenser<\/strong><\/p>\n\n\n\n A large synchronous condenser installed in New Zealand, with Skewed Slots, required a full rewind.<\/p>\n\n\n\n Previous developments had enabled the manufacture of such Stator bars with a continuous twist along their slot length, even with hard pressed insulation.<\/p>\n\n\n\n This along with the Short and Long Jumpers required for its end winding connections, complemented the parts that were manufactured from digital models.<\/p>\n\n\n\n This novel design and manufacturing process shaved substantial time and trial-and-error passes to get a first part to match the as-built stator.<\/p>\n\n\n\n This generated considerable savings of resources and helped finish the rewind in record time and exceeding the customers expectations on time and quality.<\/p>\n","protected":false},"excerpt":{"rendered":" Former Projects of note : Parameter Derivation of Synchronous Machines. Using Stator and Rotor, Voltage and Current data logging during Load Rejections, along with a Power System Model to determine Machine Parameters (Reactances and Time Constants mostly) for the publication of Models to be used by Power System Operators. Testing and data gathering and reduction …<\/p>\n