Showing papers on "Forced outage published in 2000"

Reliability model of wind power plants and its application

Abstract: In this paper, a reliability model of wind power plants is presented. The wind distribution and correlation between wind power plants, power curve and forced outage rate (FOR) of wind turbine generators, wake effects and temperature etc. are included in the model. The utilization of this model in probabilistic production simulation (PPS) and probabilistic load flow (PLF) are also discussed. Using PPS, the capacity credit and avoided cost of wind power plants can be studied. By the use of PLF, the distribution of power flow and node voltage can be calculated, therefore the penetration level of wind power can be determined. These are very important for grid connected wind power planning.

Evaluation of the forced outage length contribution of critical nuclear power systems in an extended operating cycle

Abstract: The work presented here presents an evaluation method for the question of how reliably the system (or component), responsible for the dominant plant availability loss, will run in an extended 48 month operating cycle. As major contributors to the total plant forced outage time in pressurized water reactors (PWRs), reactor coolant pumps (RCPs) and main feed pumps (MFPs) are chosen as specific example systems for a case study. The method proposed estimates the expected forced outage length contribution of each system to the maximum allowed outage length given a certain plant capacity factor. Based upon the current reliability level estimated from the Nuclear Regulatory Commission plant performance database, the assessment of each system impact shows that 14.2 and 2.2 per cent of the maximum allowed outage length are expected to be taken by RCPs and MFPs respectively in the PWR regardless of other systems. In order to meet a 97 per cent goal capacity factor to be envisaged in a 48 month operating cycle, it is recommended that various possible actions be devised for achieving the higher RCP and MFP operational availability through design, monitoring and maintenance.