1. CIGRE 2005 SC B5 Contribution to Question 2-1
Teacher Notes:
Lesson Guide
BROBLEM BASED LEARNING
START
WELCOME
PRESENTATION
YOUR EXPECTATION
COURSE DESCRIPTION AND OBJECTIVES
COMPARE
PRACTICAL MATTERS
COURSE REALIZATION
WORKSHOP
STEP BY STEP "LAZY DOG"
COURSE MATERIAL
LAZY DOG
EXAMPLES 9 8 7 6 5 4 3 2 1 12 11 10
Peter Rietmann Switzerland
CIGRE 2005 SC B5 Contribution to Question 2-1

2. Ranking of Requirements (1)
The ranking of requirements are driven by
Nature of the project
Time schedule, number of systems, frame contract
Extension of a substation, new substation, refurbishment
Distribution, Transmission, Industry, Utility
Operation philosophy, Organization
Manned or unmanned substation
Department organization and responsibilities
User groups
Purchasing, Operation, Maintenance
The Users’ requirements have to be valued differently
Depending on e.g. nature of project and the operation philosophy

3. Ranking of Requirements (2)
Substation Project / Type of substation
Weighting factors are different from case to case. In case of …
Critical substation (e.g. irreplaceable power plant connection)
No risk on time schedule and planned outage time
No room for experiments and R&D, but instead well-proven systems and equipment that have been on the market and in operation for some while are preferred even though newest developments could offer attractive features.
Less critical substation (e.g. distribution with an alternative feeding direction)
You may experiment some new functions and features and take more technology risks.
If qualitative measuring is used, selection criteria and
weighting factors shall be pre-defined in the specification

4. Ranking of Requirements (3)
Example of how different Users weight requirements
(3)
(2)
(1)