Certification Assistance for Marine Engineers

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Propulsion Plant Simulator, Level One
British Columbia Institute of Technology
Pacific Marine Training Campus
By: Martin Leduc Jan 22, 1999

Persons wanting to obtain the Canadian marine engineering license, or chief endorsement, need to complete the PPS L1 and L2 courses, in which they will have to carry out five labs. These are my results for one lab for your comparison. Findings are based on observation carried out and graphs not presented here.


Influence of the Voltage Regulator
on Load Sharing
Lab 11



This lab was performed to study the relationship of two generator while one of them is undergoing change of the excitation field current.


Method of investigation

Procedure . The procedures set forth in the PPS Level 1 Course booklet were followed. The main procedure is to increase excitation regulator of one generator from 50% to 80%.



Equipment Used. The equipment used for this experiment was the Nor Control PPT2000-M22MAK workstation. The simulated ship is Ro/Ro Passenger Vessel. Two medium speed MAK engines drive Controllable Pitch Propeller. A shaft generator is driven by the port main engine. The ship has two service generators they serve a common bus. The bus can be divided into two different bus, separating the shaft generator and the service generator.

Data. The parameters were recorded by the program’s ‘pen recorder’. The accompanying graphs, Appendix 01, illustrate the DG1 Reactive load increases as the excitation is increased. Meanwhile DG2's Reactive load decreases as it is being taken by DG1. The voltage remains constant as illustrate by Appendix 02.


Analysis of Results

The test results were expected. As the excitation increase on DG1 it’s Reactive load increase as well. This lowered DG2 reactive load.

Appendix 02 shows the Voltage of both generator remaining constant at 451Vac. There is also little change to the active load of the machines. Small ‘spike’ can be attributed to various electrical load being applied to the main bus.


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