TRANSMISSION EQUIPMENT RELIABILITY DATA FROM CANADIAN-ELECTRICAL-ASSOCIATION

Frequent forced outages of transmission equipment can significantly af fect the performance of industrial and commercial power systems and th e processes they control, Historical transmission reliability data pro vides the ability to predict the performance of various transmission l ine configurations and assess the economic impact of forced outages on industrial and commercial power systems, The prediction methodologies are presented in IEEE Std, 493 (i,e,, IEEE Gold Book) [1], This paper will present a summary of the Canadian Electrical Association's Equip ment Reliability Information System [2], [3] statistics on the forced outage performance characteristics of transmission equipment (i,e,, tr ansformers, circuit breakers, cables, etc.) for Canadian utilities for the period 1988-1992, The paper will reveal the structure of the data base and present relevant summary data (i,e,, the frequency and durat ion of forced outages) necessary for the application of these reliabil ity methodologies, A knowledge of the primary causes of the major equi pment forced outages as to whether the outages are primarily due to th e subcomponents of the major equipment or to its terminal equipment is essential for designing, operating and maintaining a reliable transmi ssion system, This paper will discuss and identify for each major equi pment the primary subcomponent (e,g,, transformer windings) and the te rminal equipment (e,g,, auxiliary equipment) which dominated the force d outage statistics of the major equipment for the five year period.