IEC TR 62140-3:2002

FOREWORD
INTRODUCTION
1 Scope
2 Controlled system
  2.1 Description of controlled system
  2.2 Design
  2.3 Steady-state behaviour
  2.4 Transient behaviour
  2.5 Calculation of time response
  2.6 Measurement of time response
3 Formulation of control task
  3.1 Control requirements
  3.2 Control performance
4 Configurations of the control circuits
  4.1 Control concept
  4.2 Control circuits
5 Realization of the control circuit
  5.1 Measuring concept and time response
  5.2 Actuator

application of this report is restricted to temperature control systems in power stations inwhich superheated steam is controlled at a desired target temperature using steam sidecontrol interventions, such as spray coolers or heat exchangers, or flue gas side controlinterventions such as flue gas reflux.