We have completed many control system upgrade projects in steam turbine plants. These plants include the following turbines:
The scope of each project varies depending upon the size of the turbine and the requirements of the client, however, they may typically include:
The focus of all the systems installed is on improving operational reliability and reducing maintenance costs. This is achieved by removing, where possible, mechanical control equipment and replacing it with modern state of the art microprocessor-based controls.
The systems are controlled and monitored by screen-based HMI/SCADA systems that provide historical and real-time trending, greatly increasing the visibility for operators and engineers.
Steam turbine governor control has in the past been achieved using mechanical devices connected directly to the output shaft. These systems suffer from a number of deficiencies:
TCL have developed digital control systems to replace mechanical and analogue electronic equipment. Typical hardware supplied will include:
PLC controller, simplex, duty/standby or TMR hardware configuration. Programmed with:
Systems are designed to interface seamlessly with the retained plant. The micro-processor based control provides the ability to provide a number of key improvements in plant operation including:
Systems are designed using a number of key criteria:
TCL have the following quality control accreditations:
The system software is produced using rigorous quality control procedures developed during TCL’s experience with developing software for nuclear power plants.
TCL have experience of replacing ageing C & I equipment on many of the auxiliary systems that support a typical steam turbine power plant, including: