Q5. Figure below shows the schematic and block diagram of a CLOSE LOOP CONTROL SYSTEM of Steam turbine. The purpose of t

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Q5 Figure Below Shows The Schematic And Block Diagram Of A Close Loop Control System Of Steam Turbine The Purpose Of T 1 (46 KiB) Viewed 33 times

Q5 Figure Below Shows The Schematic And Block Diagram Of A Close Loop Control System Of Steam Turbine The Purpose Of T 2 (34.05 KiB) Viewed 33 times

Q5. Figure below shows the schematic and block diagram of a CLOSE LOOP CONTROL SYSTEM of Steam turbine. The purpose of this control system is to control the angular speed of the steam turbine. Steam Turbine Frequency or speed measurements Valve Desired speed or frequency Figure 1: Schematic diagram of steam turbine. STEAM TURBINE BLOCK DIAGRAM Gives del signal incalt acturvalve Steam Fo Egal ch Desired spoed Controller Actu U Controle 1 Speed Measurement Trand Fin Figure 2: Block diagram of angular speed control. Find: a) Write and explain all necessary Transfer fucntion relating to the proposed process control system and obtain the transfer functions to be used to fill in the block diagram. Note that the controller utilises PID control. b) Reduce the controlled system's block diagram (final control element/actuator + plant/process) to a single block. Then, employ engineering software (e.g. MATLAB/Simulink) to evaluate the time and frequency response of the controlled system (final control element/actuator + plant/process) when subjected to various types of test input signals. Also, comment on the stability of the system using appropriate method. c) Describe in detail any additional transfer function.
Steam Turbine Valve actuator Figure 1: Schematic diagram of steam turbine. Gives control signal (electrical) to actuator valve Desired speed Error signal E(s) Į Controller Figure 2: Block diagram of angular speed control. Controller Desired speed or frequency Steam Valve actuator Frequency or speed measurements Sensor 1 Speed Measurement Steam flow 1 Feedback Turbine Sensor Actual Output Angular Speed, (s)