APRIL 30, 2016

ALLISON 571 TURBINE CONTROL UPGRADE

Northwest Electrical Services LLC provided a turnkey control system upgrade for two Allison 6.0 MW 571 split shaft turbines generators for the City of Vernon, California. The system resulted in a one button automatic start to full load within 5 minutes.

Major components of the upgrade included the Design Engineering, Assembly, Factory Testing, Installation, Commissioning, Training, Warranty, Spare Parts and Maintenance of the following:

• Voltage control utilizing Basler DECS250, including raise lower switches, lights, lockout switches, breaker control switches and Auto/Manual Switch, and pilot lights
• Replace existing synchronizer and utilize SEL-700GT for synchronization
• Replace analog gauges for Generator Volts, Bus Volts, Amps, Sync Scope, Generator Frequency, Bus Frequency, Power and Power Factor, Exciter volts and Exciter Amps
• Replace all protection devices with new SEL-700GT, incorporating the existing SEL-300G as part of the protection scheme, with consultation from SEL Engineering
• Fuel Control System (TCSD) includes the supply of a complete spare TCSD system, and on site health check with TCSD Designer assistance for Units’ 1 and 2 existing TCSD components
• Replace analog gages for MGT, N1 and N2 temperatures. Existing temperature monitoring system to be replaces by PLC inputs and HMI screen depicting individual temperatures and average temperature
• Unit Sequencing Control utilizing Allen-Bradley CompactLogix PLC and Input / Output modules (including 10% spare capacity on supplied modules) to replace existing GE Series 6 PLC for Turbine, Gearbox and Generator and Gas Systems for Leaks and Monitoring
• Wired Remote Station for the Control Room for each unit with Start, Stop and E-Stop buttons and indicating lights for ready to start and running