Case Study - How to design an Islanded Power Station to Supply Construction Power, Which Can Be Integrated into the Permanent Power System at a Later Date.
During the construction phase of a remote project, there is a need for construction power. Often this is supplied by distributed, single unit generators connected directly to the load. The generators are usually on hire for the duration of the construction
phase. The number of generators will vary from time to time as the construction progresses. The cost of the generators includes the hiring the generators plus the operating costs for fuel, connection and transport,
After construction and hand-over to operations, there is a need for permanent power. This may be an islanded power station. The island power station may have been part of the construction activity.
Sometimes it is more cost effective to build a power station which may firstly be used to provide construction power and later to provide permanent power.
The implementation of such a scheme requires the design of the power station to be fully integrated with the needs of both construction and permanent plant. It may require scheduling changes, which could impact the whole project.
There can be significant challenges in the design of the electrical power system. The power system for construction and permanent plant may need to be separated on completion of the project. Similarly, generation units may have to be either added or deleted for permanent power. The operating philosophy for permanent power may be different to that for construction power. The station control system for construction may be local and that for permanent power may be remote SCADA. The hand-over to permanent power may be required before construction is completed. The operator for construction may not be the same for permanent power. The fuel system for
construction power may be different to that for permanent power.
There are many factors which need to be carefully considered for a successful outcome with a single power station, used for both construction and permanent power. BESST have the experience and expertise to provide electrical engineering and design services for construction power stations and permanent plant, off-grid power stations.