Thermal rating probability prediction considering the temporal correlation among the thermal ratings

The thermal rating of the overhead transmission line is an important parameter for operation and control power system. In order to further integrate it into system dispatch decisions, necessary conduct prediction ratings in lookahead time horizon decisions. At present, researches on focus independent each period, without considering temporal correlation among ratings. this paper, a joint probability method multiperiod proposed. Specifically, based multivariate normal density function generated. simulation shows that process can improve results make full use currentcarrying capability lines, which will promote accommodation renewable energy saving emission reduction.