A Proposal of a Supporting System for Outage Planning of Electric Power Facilities Retaining High Power Supply Reliability

In a power system, maintenance works and updates of power system facilities are continually needed to secure stable power supply, which inevitably cause the outage of power facilities. The outage planning of electric power facilities (called “outage works”) should be done to realize a system configuration as similar to normal one as possible by utilizing flexibility in power system configurations. Since the amount of information necessary to handle the planning is prohibitively large, it has become too difficult to adjust outage works by planning engineers year by year. In addition, in traditional ways where requests for outage works are just rearranged, it is impossible to make up outage plans that secure power supply reliability in the true meaning. This paper proposes a supporting system for drawing up outage work plans of electric power facilities. The proposed system is designed to keep a high power supply reliability during outage works. In attempting to develop an automated system of adjusting relevant outage works, the maintenance of a high supply reliability has been regarded as the primary objective. Hence, the proposed supporting system does not fundamentally require information on the time and date of outage works in the first stage and only needs to specify the weather and dates that can impede outage works. To realize this, the combination of outage works is determined by executing numerical calculations associated with power supply reliability.