Short Term Reliability Analysis for Protection System with Average Unavailability

Abstract

In the short-term reliability evaluation, the state probability and unavailability are time-dependent. Remarkable error will be introduced by using the steady-state unavailability in probabilistic simulation. In this paper the analytical solution to the instantaneous state probability is derived, and the average unavailability during the evaluation period is proposed. An estimation to the average unavailability is quantified considering the time elapse from the latest transition. The proposed algorithm is validated by a short-term reliability evaluation to the protection system, and influences of the initial state, the evaluation period, the transition rate, the latest transition are studied.

Reliability Assessment of Wind Power System Considering Multi-Objective Models

“…Equivalent Model of Wind Farm. Assuming the wind speed of wind farm is the same, wind farm can be treated as one wind turbine integrated into the grid [8],as shown in Fig. 1.However, the wind speed in different locations is different considering the practical terrain factors and wake effects.So wind generators can be divided to a number of fleet followed the location of installation and unit type.That is a wind farm is equivalent to multi-wind turbines, then each wind turbine drives the same capacity induction generator, as shown in Fig.…”