GCS-407 Generator Control System

      The GCS-407 Generator Control System installed on the Frontier Driller represents the latest in state-of-the-art Generator Control technology.  This system is designed to control the speed of each of the four owner furnished EMD Model 16 645E9B diesel engines. This is accomplished via an owner-furnished Woodward Model PG 12R actuator on each unit and using an industry standard Woodward Model 2301D Digital Load Sharing and Speed Control (LSSC).

      The GCS-407 Generator Control System also incorporates a Woodward GCP31 Genset Control Package for engine and generator protection, a Basler DECS200 Digital Excitation Control System to control the voltage of each of the AC Generator Model AB21-6, and a CDS220 Current Differential System with generator ground fault detection via a core balance transformer installed at the generator output terminals. 

      These components work in conjunction with each other to make this system simple to operate and diagnose.  The various switchboard meters for Volts, Amps, KW, KVAR, and Frequency are the robust and reliable Yokogawa Digital POWER SERIESPlus. The design of the POWER SERIESPlus combines a high accuracy digital switchboard meter with transducer output which can be configured in the field by the end-user, and provides flexibility when new panel designs or system upgrades require changes in instrument transformer ratings. The rugged metal case fits standard panel cutouts for switchboard meters and makes it a perfect replacement for less versatile instruments.

      The system has two means of bringing a generator on-line.  The preferred mode would be automatically via the GCP31.  A secondary method of syncing the generator with the bus is by means of the Basler Model PRS250 VeriSync Relay provided.

      All the controls and meters interface with the model CEA-707 SCADA (Supervisory Control and Data Acquisition) package which provides, among other functions, an automatic load control system which prevents blackouts by limiting the SCR drives to a demand which is slightly less than the generator system maximum.

     The GCS-407 Generator Control System local control panels provided by EMDSI also has an interface to the CEA-707 SCADA System for monitoring of each of the engine parameters via a Fiberoptic Profibus loop (PHUB #1).  The Interface is via a owner furnished Siemens OLM in the local control panels.