在电力系统中,当负荷的有功功率保持不变时,提高负荷的功率因数,可以减少负荷的无功功率,减少线路和变压器的有功功率损耗.在电网中,线路或变压器中的可变功率损耗为:△P=3I~2R×10~(-3)=P~2/U~2cos~2(?)×10~(-3)当负荷功率因数由1降低时,线路或变压器中的功率损耗将增加:当cos(?)=0.9时,有功损耗比cos(?)=1时增加23%;当cos(?)=0.7时,有功损耗比cos(?)=1时增加107%.可见,提高负荷功率因数,线损 In the power system, when the active power of the load remains unchanged, increasing the power factor of the load can reduce the reactive power of the load and reduce the active power loss of the line and the transformer.In the power grid, the variable power in the power line or the transformer The loss is: ΔP = 3I ~ 2R × 10 -3 = P ~ 2 / U ~ 2cos ~ 2 (?) × 10 -3 When the load power factor decreases from 1, The power loss will increase: When cos (?) = 0.9, the active loss increases by 23% when cos (?) = 1 and increases by 107% when cos Can be seen, increase load power factor, line loss