Page 263 - Offshore Electrical Engineering Manual

250 CHAPTER 6 Calculation of Load Flow, Fault Currents

PROVING THE SOFTWARE

A set of example manual fault calculations with full workings should be available,
for comparison with a set of input data (generated by the proposed software) and out-
put results printout, (using identical input data) and carried out with the software,
which is intended will be used for the proposed study.
This ‘proving’ example should be run on the hardware and software (e.g.,
Windows 10) intended to be used in the study, even if it has been run successfully
before on other hardware.
Such calculations are essential to ensure that:

• The software is operating properly in the environment it is running on (e.g.,
Windows 10).
• The client can be confident of the software and consequently more confident of
the results.

MANUAL CALCULATIONS

The engineer running the study needs to have a reasonable indication as to results
expected and can check the input network and data before running the program, or
rerunning the program if not happy with the initial result.
It is recommended that programs such as MatLab or Mathcad are used for the
‘manual’ calculation rather than a spreadsheet template, as spreadsheets may intro-
duce rounding errors.
With such programs the workings can be demonstrated more easily by adding
explanatory notes etc.
Please refer to PART 4 Chapter 5 for an example fault calculation.
Please refer to PART 4 Chapter 7 for example relay studies.