The no load operation of Y, d11 traction substation is analysed systematically which results in the high voltage side phase A?C over compensation, phase B Less compensation; the active power circulation of phase A?C and the three phases symmetric power system and because the low voltage side phase a?c unsymmetric fixed reactive power compensation in Y, d11 traction substation are reached.

Summer operation test of the ice thermal storage central air-conditioning system Used in certain school;