电机学电机学电机学 (30).ppt

Electrical MachineryArmature reaction when=90 and in general condition6.2.3 Armature reaction when=90Armature reaction when=90Direct-axis demagnetizing armature reactionEffect:(1)output inductive reactive power to the system(the active power output is 0)(2)make the terminal voltage of the generator decreaseq axisd axis6.2.3 Armature reaction when=906.2.4 Armature reaction when=-90Armature reaction when=-90direct-axis magnetization-strengthening armature reactionEffect:(1)Absorb inductive reactive power(the active power output is 0)(2)make the terminal voltage of the generator increased axisq axis6.2.4 Armature reaction when=-906.2.5 Armature reaction in general conditionArmature reaction when 090Quadrature-axis armature reaction andDirect-axis demagnetizing armature reaction coexistEffect:(1)outputting active power,also outputting inductive reactive power;(2)the terminal voltage of the generator decreasesd axisq axis6.2.5 Armature reaction in general conditionGeneral Condition 1General Condition 26.2.5 Armature reaction in general conditionArmature reaction when-900Quadrature-axis armature reaction andDirect-axis demagnetizing armature reaction coexistEffect:(1)outputting active powerAlso outputting capacitive reactive power;(2)The terminal voltage of the generator increasesd axisq axis6.2.5 Armature reaction in general conditionGeneral Condition 1General Condition 2THANKS FOR WATCHING!