| 摘要 |
PROBLEM TO BE SOLVED: To control the conduction current on a line just to a maximum level within thermal limit while taking account of weather conditions by delivering a feeder interruption command when a predicted temperature of the line after a predetermined time later is increasing over a decision level or when an estipated temperature exceeds the decision level for a predetermined time or longer continuously. SOLUTION: When a temperature θn+j1 of a line after a predetermined time later predicted while taking account of weather conditions has increasing trend and a decision is made that the highest allowable temperature θL is reached surely (decision of event 2), or when a decision is made that a temperature θn . of the line estimated while taking account of weather conditions has exceeded a dangerous level θH for a predetermined time or longer (decision of event 1), a feeder interruption command is delivered by determining that the load must be limited with no delay through a so-called predictive decision method. According to the method, the conduction current on a line can be limited just to a maximum level within thermal limit. |
