analysis in the smart substation

 

 

YU Bin1, ZHANG Li2, GAO Bo1, DING Jin jin1, WANG Yu1, LI Yuan song1

 

(1.State Grid Anhui Electric Power Research Institute, Hefei 230601, China;

 

2. State Grid Anhui Economic Research Institute, Hefei 230022, China)

 

 

Abstract: Aiming at the problem of lack of indexes for the power secondary system reliability analysis in the smart substation, new indexes and index calculation method for the power secondary system reliability analysis were studied, and the common features of the power secondary system in the smart substation were summarized according to the IEC61850 standard, and the steady unavailability of function(Us), loss of function probability(LOFP) and expected functions not working(EFNW) were put forward as the reliability indexes, and a reliability simulation algorithm was designed based on non sequential monte carlo using matlab language. Finally, the reliability of the power secondary system in a T11 smart substation was evaluated by the built algorithm using the proposed reliability indexes, three cases which considering different structures and redundancy networks were practiced. The results indicate that the new indexes can reflect the function reliability and the system reliability of the power secondary system with good sensitivity and applicability, has an important guiding significance for reliability analysis of the power secondary system in the smart substation.

 

Key words: smart substation; power secondary system; function; reliability index