Reliability research of 1 000 kV main electrical connections based on improved GO methodology

GONG Jian-bo， HUANG Min-xiang， XU Guo-feng
（College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： Considering the rapid development of ultra-high voltage grid putting forward higher requests to reliability research of 1 000 kV main electrical connections，a new success-driven reliability assessment method called GO methodology，was introduced to the power system field. The improved GO methodology was presented through the comprehensive consideration of the operator relevance，and adapted well to the flexibility of main electrical connections operation. The GO model charts of 3/2 circuit breaker and double circuit breaker were built clearly，and the quantitative reliability evaluations of two typical main electrical connection patterns by considering the three and two state component models were carried out，and the recommended scheme was advanced. The results show that it has the advantages of reliability research on main electrical connections using improved GO methodology.
Key words： improved GO methodology； 1 000 kV main electrical connections； GO chart； operator relevance；reliability