We have developed comprehensive operations and maintenance cost models based on extensive experience and benchmarking to actual wind project component failure rates. Our capabilities also include overhaul analysis and remaining useful life assessments. Our O&M cost model combines component-level wear/failure statistics with current replacement costs, labour costs, and crane costs to generate estimates of expected future cost ranges.
DNV GL will perform a detailed site- and turbine-specific cost-benefit analysis of maintenance costs, and the potential losses due to underperformance and low availability levels. An in-depth analysis of the wind farm’s SCADA data enables parameters such as statistical failure rates and repair times to be assessed. These parameters and other meteorology-dependent parameters are then used to design the required probabilistic models.
The flexible and customisable service package DNV GL offers includes:
- O&M budgeting and sensitivity analysis: Comparison of real to budgeted expenses and of actual failure rates to industry average; evaluation of different O&M scenarios to define an optimised scenario
- Spare parts strategy advice: Identification of supply chain bottlenecks; evaluation of various spare part sourcing options; development of a main component repair strategy; advice on main component storage; cost-benefit analysis of stockholding costs
- Review and advice on retrofit solutions: Evaluation of the potential impact of proposed retrofit solutions on future O&M costs and wind farm availability
- Operational risk mitigation: Identification of possible risks; an FMECA to establish the probability of failure and severity of consequences; recommendations for additional software and hardware; advice on subcontractor management; proposal of maintenance planning schedules
- End-of-warranty handover strategy planning: Comprehensive advice and assistance to ensure trouble-free, cost-optimised transition from the warranty period to a client’s own responsibility for O&M