scope:

Objective and scope

The series of guidelines VDI/VDE 3501 through VDI/VDE 3506 gives guidance on the proper design of control circuits for steam generators in fossil fired power stations. VDI/VDE 3500, VDI/VDE 3507, and VDI/VDE 3508 refer to the complete power station. Each of the guidelines in both groups is an independent document, but their contents are largely coordinated. Whereas guidelines VDI/VDE 3501 through VDI/VDE 3506 share the same general structure, the structures of guidelines VDI/VDE 3500, VDI/VDE 3507, and VDI/VDE 3508 had to be adapted to the different types of contents.

The findings and experiences contained in the guidelines are widely known and acknowledged, but the information has not previously been compiled in this form.

The terms and notations used are in accordance with the definitions and symbols as given in the standards DIN 19 226-2 "Control technology; Terms and definitions; Dynamic systems behaviour", DIN 19 227-2 "Control technology; Graphical symbols and identifying letters for process control engineering", DIN 2481 "Thermal power stations", and ISO 3511-3 "Process measurement control functions and instrumentation - Symbolic representation - Part 3: Detailed symbols for instrument interconnection diagrams".

This VDI/VDE guideline deals with the controlled power station unit the main components of which are the steam generator and the turbogenerator set, including interfaces to connected networks, and the interactions with these networks.

Considering the growing economic importance of gas turbines, and of their combinations with steam generators and steam turbines, it is useful to describe these systems, with their dynamic characteristics and the resulting additional potential for control structures, and their suitability and application in more detail than will be possible in this guideline. This will be the subject of a further part of this guideline.