不平衡牵引负荷对电网容量占有的探讨

Discussion on Capacity Occupaiinn of Unbalanced Traction load in Power Grid

电气化铁道牵引负荷是典型的不平衡负荷,其负荷状况成为电网公司和铁路部门多年关注的热点问题,理论计算了在线几种典型的牵引变压器的输出容量,探讨了其各自对电网的占有容量,理论分析了三相不平衡负荷的功率因数定义及提高功率因数的方法,结合变电所实测数据,经对比分析,提出了抑制电压不平衡度的方法,最后从供电部门角度,探讨了牵引变电所容量电费计费方式。

Electrified railway traction load is a typical unbalanced load , and its load status has become a hot issue concerned by the grid companies and the railway sector for many years .The output capacity of several typical traction transformers is cal-culated theoretically , and their capacity occupation in power grid is discussed .The definition of power factor of three -phase unbalanced load is analyzed theoretically and the method to improve the power factor is given .Then combined with the meas-ured data in traction substation , the method of reducing voltage unbalanced degree is proposed by the comparison and analysis . Finally, the calculation methods of capacity tariff in traction substation are discussed as viewed from the power supply depart -ments.