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Turbine Digital Electro-Hydraulic Control SystemTriple Modular Redundant System
Product introduction
Application
The MicroNet Plus and MicroNet Simplex controls are a 32-bit microprocessor-based digital controllers that are programmable for many types of applications in the control of:
■ Gas and Steam Turbines
■ Gas and Diesel Engines
■ Hydro Turbines
The MicroNet Controls family provides a flexible system to control any prime mover and its associated processes such as high speed control functions, system sequencing, auxiliary system control, surge control, monitoring and alarming, and station control. The MicroNet platform is available in simplex, redundant, and triple modular redundant (TMR) configurations.
Summary
The MicroNet TMR (triple modular redundant) controller is a state-of-the-art digital control platform designed to reliably control and protect steam turbines, gas turbines, and compressor trains used in system-critical applications where the chance of a safety issues or large economic losses may be possible. The MicroNet TMR’s 2-out-of-3 voting architecture ensures that correct decisions are made, correct responses are performed, and the prime mover continues to safely operate with or without any single-point failure. This controller’s robustness, accuracy, and availability make it the choice of turbine and compressor OEMs and operators.
Programming
The MicroNet TMR control system provides an IEC1131-3 environment for programming. Application code is generated by use of Woodward’s GAP™ Graphical Application Programming environment or Woodward’s Ladder Logic programming environment.
Communication
The MicroNet TMR® platform’s open-architecture allows users to easily interface with plant DCSs, HMIs, and distributed I/O devices for system operation, as well as control programming and service. Multiple communication ports and protocols are available for system communications, allowi ng users to select their desired communication method and level of communication redundancy. MicroNet-to-DCS communications have been performed and qualified with all major DCS vendors. The following communication ports are available for use:
■ Ethernet ports (10/100 BaseT)
■ RS-232/-422/-485 Serial ports
■ LON network for LinkNet® Distributed I/O Modules
Protocols Supported:
Modbus® * (Serial or Ethernet)
■ Ethernet TCP/IP & UDP
■ OPC (OLE for Process Control)
■ Printer Drivers, Modems, Data Loggers
Expandability
The MicroNet TMR platform is expandable into additional expansion chassis as required by the system size, and will support any mix of I/O, including networked and/or distributed I/O. Redundant “Real-Time Ethernet” networks are utilized between main and expansion chassis to ensure a fast and reliable communications. Expansion chassis are available in 6-, 8-, 12-, or 14-slot models. This TMR architecture allows all remote I/O points to be automatically shared with each kernel CPU, increasing system robustness and availability.
