wilamowski-b-m-irwin-j-d-industrial-communication-systems-2011

29
Protocols in Power
Generation
Tuan Dang
EDF Research
and Development
Gaëlle Marsal
EDF Research
and Development
29.1 Introduction.....................................................................................29-1
29.2 Power Plant Automation Systems and Intra-Plant
Communications.............................................................................29-2
Example of Nuclear Power Plant Automation
Systems. •. Safety Requirements and System Classifications
(IEC 61226, F1A, F1B, F2)
29.3 Power Plant Information Systems and Extra-Plant
Communications.............................................................................29-4
Common Information Model. •. Distributed Energy
Resource Model
29.4 Conclusions......................................................................................29-7
References....................................................................................................29-7
29.1 Introduction
Power generation is a complex process in which automation systems play important roles in assisting
humans to operate the plant. Safety automation systems are designed, however, to run autonomously
in order to protect the process running out of its operating domain or to avoid human errors.
A power plant is designed to operate in complex power grids in which human and automation systems
interact together to deal with unexpected situations. These situations may concern the imbalance
between generation and consumption following hazards or failure of the power plant or the network,
or the need of power ancillary services to stabilize the grid’s frequency or voltage. Today,
most of the power plants control room is connected to the utility economic dispatch systems where
power generation optimization is performed in conjunction with trading operation. To improve
the efficiency of maintenance operation, modern power plant information systems are more and
more connected to a centralized e-monitoring center (Figure 29.1) where plant experts can analyze
process parameters for studying the improvement of plant performances or for planning conditionbased
maintenance.
As shown in the above figure, modern power plant information systems are designed to interface with
the world outside the plant: the grid, the economic dispatch center, the e-monitoring expertise center,
etc. In the following paragraphs, we will present the most common communication protocols used for
intra- and extra-power plant communications.
29-1
© 2011 by Taylor and Francis Group, LLC