【摘要】 合理选择变压器的容量可以降低变压器的有功功率损耗和无功功率损耗,提高电力系统运行的经济性。为此,计算了三绕组变压器功率损耗和损耗率,同时考虑负荷的实际运行时间、无功经济当量及变压器年运行费用等因素,并对选择三绕组变压器最佳负载率βopt进行了推导。最后,以算例验证了公式。更多还原

【Abstract】 Proper selection of transformer capacity can cut down the active power loss and the reactive power loss, and improve the economical operation of the power system. This paper calculates the power loss and loss ratio of the three winding transformer, and develops a formula of optimal load coefficient βopt for the three winding transformer with consideration of the actual load duration, economical weight of reactive power and annual running cost of the transformer, and validates the formaula with samples.更多还原