谐波环境中的变压器负载能力问题

Load Capacity Issues of Transformer in Harmonic Environment

谐波电流的存在可能使电力变压器绕组线圈承载超过其额定工况的电流,从而导致变压器的额外温升,并使得变压器负载能力下降。本文阐述D,yn11电力变压器在抑制谐波过程中的作用,介绍谐波系数K及电力变压器降容系数D的物理意义,并就电力变压器降容问题的形成机理展开讨论,给出降容系数D的工程计算实例。

The existence of the harmonic current may result in the bearing of excessive current by winding coils of power transformer, thereby leading to the additional temperature rise of transformer and reducing its load capacity. The paper describes the effect of the D, yn11 transformer on harmonic suppression, introduces the physical meanings of harmonic coefficient K and transformer derating factor D, discusses the mechanism of transformer derating and provides engineering calculation examples for derating factor D.