Power Systems Studies Professional Services

Tender description

The contracting entity intends to procure power systems studies services to appoint a single supplier framework member for each of the three lots below: • Lot 1 Power system studies; • Lot 2 Substation earth grid design and testing services; • Lot 3 Protection studies. More details are provided in the PQQ document. Lot 1: Lot 1 Power System Studies Lot 1 Power system studies Development of practical solutions for clients based on power system analysis. • transmission system planning studies: load-flow and short-circuit analysis, contingency analysis, dynamic stability analysis, insulation-coordination and power quality studies; • distribution system planning studies, electricity demand forecast, master-planning and spatial load forecasting, distribution loss adjustment factor calculations; • grid connection studies: fault ride-through studies, reactive power capability studies, power quality studies and rate of change of frequency studies; • active distribution system management studies: network analysis and the effect of active network solutions on the capacity of the distribution system, to include the congestion analysis and a cost-benefit analysis of different active solutions to support 2030 targets of renewable generation and low carbon technologies. Lot 2: Lot 2 Substation Earth Grid Design and Testing Services Lot 2 Substation Earth grid design and testing services • consultancy support service: investigating earthing related incidents, either on site or from information provided; written professional comment on documents, reports or proposals supplied to ESB by a third party; • earthing design: earthing system re-design from findings of substation assessment or as part of substation upgrade; design earthing for new substations based on ESB earthing policies and applicable standards; all computer modelling should be undertaken using SES Tech CDEGS software; • substation assessment — earthing survey: carry out visual inspection of the above ground earth conductors, measure the resistance of a sample of joints, check the integrity of the bonding of the main plant items to the substation earth grid, establish the location and the installed depth of the significant parts of the electrode system installed, provide digital copy of the drawing on the completion of the survey. Lot 3: Lot 3 Protection Studies Lot 3 Protection studies • consultancy support service: investigating protection related incidents, either on site or from information provided; written professional comment on documents, reports or proposals supplied to ESB by a third party; assistance in designing specific or generic protection systems for high voltage and medium voltage plant, assistance in providing professional comment on parts of protection policies; • protection setting calculations for transmission and distribution system, for utility and industrial clients; • provide protection settings calculation in accordance with client policy. Protection coordination studies to be carried out using PSS CAPE or PowerFactory software.