For some steam turbine generator applications, the over-riding concern is reliability. Examples include spinning-reserve backup power at a petrochemical plant or prime power at a facility without adequate utility power, or any larger system where the cost of an unexpected shutdown is high. Ewing Controls custom designs all our control systems to meet specific customer requirements, but high-reliability systems need an extra level of customization to meet rigorous customer specifications. Redundant components and sophisticated communications are the distinguishing characteristics of high-reliability systems. The control system communicates with the plant DCS but is fully self-contained and self-protecting.

 

  • Turbine and generator controls are fully integrated into a single control system
  • Redundant Siemens or Allen-Bradley or triple-redundant Triconex PLCs for maximum reliability
  • Data communications with redundant Ethernet switches in self-healing ring topologies utilizing Modbus TCP/IP, Profinet, Allen-Bradley Ethernet IP, OPC and IEC 61850 protocols
  • For single-valve or extraction/induction turbines
  • Temperature controlled startup sequencing
  • Features for multiple turbine applications including load sharing, VAR sharing and master pressure control functions and integration with plant ECMS systems
  • Multiple operator interface stations with options for full power plant SCADA systems
  • Redundant generator protection relays from SEL, GE and Beckwith
  • Fully automatic synchronizing across multiple circuit breakers
  • Redundant Basler automatic voltage regulators and optional power system stabilizers
  • Independent SIL 3 safety shutdown systems utilizing Woodward ProTech TPS or other industry standard devices
  • In-service testing of critical shutdown circuits
  • Bently-Nevada bearing monitoring
  • Redundant control power inputs
  • Weather-proof startup panel
  • Full range of options to meet specific requirements
  • World-wide field service for training, commissioning and service