The paper describes a reliability modelling method designed for transmission grid reliability evaluation. The method uses reliability analysis tools (event and fault trees) combined with power system dynamic simulation. Event trees (ET) are created to model the substation. events after line faults. The different end states (fault duration, circuit breaker trips) of the event trees are then simulated with power system analysis program. The dynamic analysis results are classified into system states of interest: secure, system breakdown and partial system breakdown. The next step is to analyse again the event trees, but now the substation end states are labelled according to the power system states instead of tripped components and fault durations. The probabilities of different states, corresponding minimal cut sets and importance values are calculated for the system breakdown. With this method, an existing 400 kV transmission grid with its line fault and device failure statistics has been analysed.
|Series||IEE Conference Publication|
|Conference||3rd IEE International Conference on Reliability of Transmission and Distribution Networks (RTDN 2005)|
|Period||15/02/05 → 17/02/05|
- reliability analysis
- power systems