Reliability assessment of power system based on topology logic relation

A method for power system reliability evaluation based on topology logic relation is presented. Firstly, topology logic analysis for substation is made to get equivalent nodes and the connectedness, then system topology logic analysis is carried out to get the power network model which is used to calculate the indicatrix on reliability of power system. The proposed method achieves a more realistic simulation of power system operation process and improves the accuracy of reliability assessment. Test on RBTS-BUS6 system proves that the method is correct and effective. Using this method in power grid reliability sensitivity analysis, the reliability sensitivity of primary equipments can be evaluated and compared directly to satisfy the demand for maintenance strategy better.