Abstract: The problems existed in reactive compensation of 10kV distribution line were discussed and improvement measures were adopted. For the single compensation device, the power factor was reached optimum effect by using the optimized control theory. For multipoints cooperative reactive compensation, according to the features of the line, the optimum compensation points were found by calculation, and the multicompensators cooperative control was realized by using the dynamic programming method, so the loss of the line was minimized.

Key words: reactive compensation, optimum control, dynamic programming method