Steam turbine emergency trip system Steam turbine monitoring is an automatic control and protection device with a programmable logic controller (PLC) as the core. The system adopts redundant commercial double CPU configuration, uses microprocessor to collect shutdown signal sent by on-site protection device, and after calculation, sends out an instruction to close the steam inlet door urgently to stop the steam turbine, and provides shutdown diagnosis information for DCS and SOE systems. Practice has proved that the whole system has high reliability and is an important protection system of the power plant.
The system control cycle is less than 50ms.
The average continuous running time is not less than 99.9%.
The operating environment is 0~40°C.
Power supply: two sets of AC 220V power supplies, each with a capacity of 1.5kVA
The main function
Turbine Overspeed Protection
Lubricating oil low pressure protection
Support pumping and return oil temperature protection
Large expansion difference protection
Large axial displacement protection
Vacuum low pressure protection
Thrust bearing return oil temperature protection
Bearing bush vibration protection
Generator main protection
Other protection functions can be selected and designed by users according to on-site control requirements.
Dual power supply, non-disruptive switching, good stability
Input and output isolation, strong anti-interference ability
Important signals can be designed redundantly, or two out of three can be voted on
The switching switch with protection is not only convenient to operate, but also prevents the protection from being arbitrarily withdrawn during operation
Emergency stop function independent of PLC, can realize emergency stop under any circumstances
Self-diagnosis function to eliminate potential hidden dangers
Distinguish the indication at the first time, which is convenient for users to analyze the reason
Possess perfect online test means