Sabah Electricity Sdn. Bhd. planed to construct a 500 kV EHV AC connection on the island of Borneo between the generating station at Bakun, Malaysia, to the load centres in Sabah. The transfer of 1,200 MW of power from Bakun to Sabah, over a distance in excess of 680km, gave rise to particular challenges to ensure that the transmission interconnection is secure and reliable.
Teshmont was retained to perform planning studies to identify system requirements, and equipment design studies to prepare specifications.
Concerns regarding power system stability were addressed that could result in severe operational constraints and frequent power brownouts and even blackouts due to the relatively weak Sabah network, which has potential frequency and voltage problems.
The project was divided into two phases: “Phase 1” consisting of Power System related studies and “Phase 2” dealing with the preparation of Tender Documents for public floatation, negotiations and final contract award.
The services provided by Teshmont included:
Planning studies to identify system additions, upgrades or equipment replacements in the existing systems that would be necessary when the 500 kV transmission system is added. The studies included load flow, transient stability, transient over-voltage/self-excitation, short circuit, reactive compensation, sub-synchronous resonance screening, and a small signal stability study
Equipment design studies and investigation, including design studies for compensation equipment, station single line diagrams, development of station layouts, protection and control requirements, station equipment insulation coordination, breaker transient recovery voltages (TRV), station civil and mechanical design requirements, building conceptual design, operator control and monitoring, fire protection, and station environmental impact
Specifications and bidding documents, tender evaluation, and negotiations with contractors
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