重点作业解答1-4var05.222MUblQNBMVAjjQSSB2032max182.0223232cos223150MWRUSpLN4.2221kWhpW75625003-11(查表得)4-12本题计算有误;应先计算最大和最小负荷的首端功率,再计算最大和最小负荷的电压损耗。1min1minmin22min2min22min()tTNNVVVVVVVV1max1maxmax22max2max22max()tTNNVVVVVVVV7-118-118-11