【摘要】 三相对称的交流系统经过可控硅整流设备整流后,会产生高次谐波,不仅影响电网的电能质量,严重时造成继电保护误动,烧毁微机保护线路板、数字电度表及其它微机装置。合理的设计选择交流滤波装置,就可以很好地滤掉高次谐波电压。本文在综述了谐波危害及抑制谐波的方法基础上,主要就消除高次谐波,合理的选择交流滤波器进行了理论计算和讨论。更多还原

【Abstract】 During the process of the rectifying by thyristor in the three phase symmetric AC power system the high order harmonic current is produced.It is harmful to the power system not only influencing on the power quality but also resulting in the maloperation of the relay protection or burning out the electrical board of micro computer protection and digital electrometer and other devices in the computer system.It is,nevertheless,possible to filter the high order harmonic voltage by using AC filter equipment reasonably designed.On the basis of description of the harm of harmonic current and the method of restraining the harmonic,this paper presents the theoretical calculation of AC harmonic filter,and also the way of reasonable selection of the AC filter for eliminating the high order harmonic current is discussed as well.更多还原