Yunguang ¡À 800kv Uhv Dc Transmission System Rcm Maintenance Scheduling Optimization

Yunnan-Guangdong±800kV UHVDC transmission line is the first DC transmission line which have the voltage of±800kV. The DC system is from Chuxiong converter of Yunnan to Suidong rectifier of Guangdong. The Chuxiong converter is connected to Heping substation by two AC transmission lines, and then the Heping substation are connected to Xiaowan hydro power and hydro power by two±500kV AC transmission lines.This paper is based on the decision-model of maintenance task interval. Use decision-model of maintenance task interval for the equipments of±800kV UHVDC transmission system to gets the maintenance task interval of those equipments. Then calculate the primary maintenance task interval of UHVDC system. Take the primary maintenance task interval back to decision-model of maintenance task interval to calculate the reliability index of equipments. Use the reliability index of equipments to calculate the primary connotation-loss. Take primary maintenance task interval and primary connotation-loss into optimization model of maintenance schedule to get the optimization result of maintenance schedule. Use Benders decomposition method, enumeration method etc. to get the result. And then take the result bake to decision-model of maintenance task interval for getting the new reliability index of equipments. Compare the new reliability index to the primary index which we have been used in the decision-model of maintenance task interval, and then we can judge the correctness of the result from optimization model of maintenance schedule. If the result is not accord to the correct one, we should adjust the primary reliability index to calculate after getting a correct result.This method avoid problem of the random primary value which always lead long calculate time. Take the reliability of equipment into system's optimization model of maintenance schedule, and the result of optimization model becomes more accepted.