In this paper

the genetic algorithm（GA） and trust-technology（trust-tech） algorithm are combined to solve the configuration problem of capacitor in the distribution network. Corresponding mathematical model is built and the sum of purchasing cost of capacitor

installation cost

maintenance cost and active loss expenditure are taken as objective function. The algorithm includes two stages

the GA algorithm with global searching ability is used firstly to identify space area containing high quality and optimal solution

then partial optimal solution in the area is searched by the trust technology and the most optimal solution is taken as the capacitor’s configuration scheme. The algorithm is used test of actual system and it is show by the test result that this algorithm can obtain better solution than that of genetic algorithm and the solution has certainty.