The Emergency Trip System (ETS) for turbines is designed to monitor certain parameters that significantly affect the safe operation of the unit. When these parameters exceed the safety operation limits, the system actuates the trip solenoid valve to control the turbine protection system, closing all steam inlet valves to the turbine, initiating an emergency shutdown. Additionally, it provides shutdown diagnostic information to systems such as SOE (Sequence of Events).
PLC-based ETS (ETS-LM)
About PLC-Based ETS (ETS-LM)
The PLC-based ETS-LM is developed based on the HollySys LM-G3 PLC platform, which completes core functions such as data acquisition, calculation, and output. It is suitable for small turbine units. Using PLC system as the main controller has the advantages of fast response, high reliability, long life, centralized management, decentralized control, easy logic modification, convenient increase or decrease of protection conditions, etc.
Product Features
· Rapidity: Support for redundancy configuration of the module and power supply, ETS system not affected when any set of PLC fails or any power supply disappears
· Safety: Input and output of the two sets of redundant PLC systems adopting relay for isolation and physical loop hard isolation to ensure system safety and stability
· Rapidity: System control cycle < 20 ms
· Anti-inteference: Anti-interference measures used for resisting various electromagnetic waves and communication equipment on site, and compliant with IEC61131-2 and IEC61000-4 standards
Integrated ETS (ETS-K)
About Intagrated ETS (ETS-K)
The integrated ETS-K adopts HollySys HOLLiAS ® MACS-K system as the platform, and redundant fast main controllers to form the ETS system, which continuously receives alarms and shutdown signals from the TSI system, DEH system and other equipment of the turbine generator set online, and performs comprehensive logic judgment. The system is suitable for medium and large turbine units. When the normal operation of the unit is affected, various protection signals such as shutdown, alarm and interruption of the unit are sent in time to make the turbine shut down safely, and provide shutdown diagnosis information for DCS and SOE systems.
Product Features
· Reliability: Independent system, redundant configuration, independent redundant fast controller and redundant power supply
· Rapidity: IEC operation cycle of 10 ms, 20 ms, 40 ms, 50 ms
· Anti-interference: Anti-interference measures used for resisting various electromagnetic waves and communication equipment on site, and compliant with IEC61131-2 and IEC61000-4 standards
· Safety: Various trip commands, alarms, and partial relay control circuits, and automatically activating the shutdown solenoid to quickly close the steam inlet valve when a turbine generator fault or other fault occurs
Triple-Redundant ETS (ETS-SGM)
About Triple-Redundant ETS (ETS-SGM)
The ETS-SGM adopts the HiaGuard safety instrumentation system (SIS) as its platform, which is independently developed by HollySys for the safety field of industrial automation and realizes emergency shutdown. HiaGuard is certified by TÜV (Rheinland Industrie Service GmbH) and meets SIL3 safety-related applications as defined by IEC 61508 (2010), and the safety-grade protection unit is a triple modular redundant system.
Product Features
· Reliability: SIL3 security level, and two-of-three architecture with diagnosis (2oo3D) used to ensure system security
· Security: Support for degraded operation with a 3-2-0 mode, redundant configuration of I/O modules, seamless switching, and system availability of 99.999%
· Wide coverage: Fault diagnosis located to the channel level
· High performance: SOE accuracy of 1 ms
· Integration: Seamless integration with HOLLiAS ® MACS system, and support for integration with third-party DCS through the Modbus interface
· Scale: Up to 1 main cage and 6 expansion cages supported by a single station, and up to 1856 I/O points
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