A PROPOSAL OF A SUPPORTING EXPERT-SYSTEM FOR OUTAGE PLANNING OF ELECTRIC-POWER FACILITIES RETAINING HIGH-POWER SUPPLY RELIABILITY - PART I - OUTLINE OF A SUPPORTING SYSTEM AND OUTAGE WORK ALLOCATION BASED ON INDEXES

It is necessary for a power system to undertake maintenance works regu larly to secure stable power supply, which inevitably cause outage of associated apparatuses. This problem, referred to as the outage planni ng of an electric power system in this paper, has been so far made bas ed on the knowledge and experiences of planning engineers. However, th e scheduling made by the engineers is not necessarily optimal since th ere are no rational criterion to judge the results. Furthermore, this problem belongs to a class of combinatorial optimization problems. The refore, we propose a supporting expert system for the outage planning retaining high power supply reliability. This paper presents some issu es on the outage planning and an outline of the proposed supporting sy stem. The concept of work unit is introduced and three security indice s are utilized to properly merge several related outage work into the same group.