电力变压器无功补偿的经济运行分析

Economic operation analysis of reactive power compensation for power transformer

变电所通常根据电力变压器负载的功率因数来调整负载侧并联电容器的容量,以达到减少供电损耗的目的。这种做法仅考虑了提高并联电容器的功率因数可以减少变压器供电损耗,未考虑电容器容量的增加会导致电容器介质损耗增加。因此,应在全面考虑变压器损耗与电容器介质损耗之和最小的基础上,分析研究变压器无功补偿经济运行的主要影响因素,计算得出电容器投入和切除的临界负载与经济运行的节电效果。

The capacity of shunt capacitors on load side is usually adjusted according to the power factor of transformer load in order to reduce power loss. This method only considers the increase of power factor of shunt capacitors to reduce power loss of transformers, but neglects the increase of capacitor capacity to increase the dielectric loss of capacitors. On the basis of considering the minimum total loss of the sum of transformer loss and capacitor dielectric loss, the main factors affecting the economic operation of transformer reactive power compensation should be analyzed and the critical load of capacitor input and removal and the energy saving effect of economic operation should be calculated.