減少對電網幹擾的方法有以下幾種：

（1）減少電壓過衝。減少電壓過衝既可避免管子承受過高的電壓，又可減少對電網的高頻噪聲。選擇反向恢複電流小的二極管（如炭化矽二極管）也是一種減小幹擾源強度的可行的方法。雖然調整觸發脈衝的跳變沿和加大柵極的電阻等可以降低dv/dt，但這會加大開關損耗和降低整個裝置的效率，需要從開關電源的各項性能來綜合考慮其取舍。

（2）改進調製方法。將頻率不變的調製改為隨機調製、變頻調製和所謂“∑△”tiaozhidengdeng。pinlvgudingbubiandetiaozhimaichongchanshengdeganraodipinduanzhuyaoshitiaozhipinlvdexieboganrao，dipinduandeganraozhuyaoshijizhongzaigexiebodianshang，ersuijitiaozhidengfangfachanshengdedipinganraozefensanzaiyidingdepinduanshang，yinci，caiyongshangshucuoshiyouliyukaiguandianyuantongguodianciganraodepinputexingdeceshi
，shizhifuhedianyuandediancibiaozhun。

（3）增加輸入濾波器。（1）和（2）liangzhongfangfazhuyaoshicongjianshaoganraoyuandeqiangduzheshoude
，erzengjialvboqishiconggaibianouhetongdaodetexingrushoude。zengjiadegongmolvboqishikeyijianshaokaiguandianyuanduidianwangdeganrao。ruguobujiashurulvboqi
，dianyuanduidianwangdeganraojiangdadachaochuxiangyingdebiaozhun。erjiarushurulvboqihou，dianyuanduidianwangdeganraozehuifuhexiangyingdebiaozhun。zaiceliangshikaolvdaokaiguandianyuanduidianwangdedipinduanganraozhuyaoshikaiguanpinlvzhengshubeidegecixiebo，gusaopinyidepindaifenbianlvwei200Hz
，而在150KHz-30MHz頻段頻帶分辨率為9KHz。另外，采用屏蔽措施也可以減少開關電源對電網的幹擾。

電dian源yuan通tong過guo電dian磁ci兼jian容rong的de測ce試shi鑒jian定ding，達da到dao標biao準zhun的de要yao求qiu
，與yu開kai關guan電dian源yuan在zai使shi用yong過guo程cheng中zhong會hui不bu會hui引yin起qi不bu允yun許xu的de幹gan擾rao是shi兩liang回hui事shi。達da到dao標biao準zhun的de電dian源yuan使shi用yong或huo處chu理li不bu當dang，在zai使shi用yong中zhong也ye會hui引yin起qi嚴yan重zhong的de幹gan擾rao。而er且qie，開kai關guan電dian源yuan既ji是shi一yi個ge電dian源yuan裝zhuang置zhi
，也ye是shi一yi個ge噪zao聲sheng發fa生sheng裝zhuang置zhi
，它ta和he受shou擾rao體ti之zhi間jian是shi通tong過guo耦ou合he通tong道dao連lian接jie在zai一yi起qi的de
，顯xian然ran耦ou合he通tong道dao的de特te性xing與yu受shou擾rao體ti的de特te性xing配pei合he不bu好hao而er引yin起qi嚴yan重zhong的de幹gan擾rao是shi可ke能neng的de，開kai關guan電dian源yuan並bing聯lian供gong電dian引yin起qi整zheng個ge係xi統tong不bu穩wen定ding的de現xian象xiang也ye是shi存cun在zai的de。

youdeshouraotiduiganraodeshiyuboxingmingan，ruyoudeshuzidianluzaiganraomaichongzuoyongxia，huichanshengwudongzuoyushiyuboxingyouguan，jibujinyumaichongfuduyouguan，erqiehaiyumaikuanyouguan。jibiankaiguandianyuandadaolexiangyingdebiaozhun

，dantaduiwaichanshengganraodeshiyuboxingyinqijiaoyanzhongdeganraoshikenengde。jiyuyishangkaolv，youdekaiguandianyuanyonghu
，chuleyaoanbiaozhunjiancekaiguandianyuandediancijianrongxingnengwai
，haiyingdangzengjiayixiezaikaiguandianyuandetedingdeshiyongtiaojianxiademouxieganraoxingnengdejiance。

此外
，有的開關元件在開通和關斷時產生的跳變是不同的，開通時產生的dv/dt會大於關斷時產生的dv/dt，對(dui)外(wai)產(chan)生(sheng)的(de)幹(gan)擾(rao)也(ye)是(shi)前(qian)者(zhe)大(da)於(yu)後(hou)者(zhe)。而(er)且(qie)，導(dao)通(tong)時(shi)的(de)跳(tiao)變(bian)與(yu)負(fu)載(zai)等(deng)因(yin)素(su)基(ji)本(ben)沒(mei)有(you)關(guan)係(xi)。如(ru)果(guo)采(cai)用(yong)隨(sui)機(ji)調(tiao)製(zhi)電(dian)源(yuan)和(he)固(gu)定(ding)頻(pin)率(lv)的(de)調(tiao)製(zhi)的(de)電(dian)源(yuan)兩(liang)者(zhe)開(kai)關(guan)元(yuan)件(jian)
，如(ru)LGBT
，其驅動回路的參數和驅動脈衝都相同，因此兩者的開關的電壓跳變相同

；在(zai)兩(liang)者(zhe)的(de)對(dui)外(wai)幹(gan)擾(rao)耦(ou)合(he)通(tong)道(dao)也(ye)相(xiang)同(tong)時(shi)，從(cong)對(dui)電(dian)網(wang)的(de)幹(gan)擾(rao)測(ce)試(shi)結(jie)果(guo)的(de)頻(pin)域(yu)特(te)性(xing)來(lai)看(kan)前(qian)者(zhe)要(yao)優(you)於(yu)後(hou)者(zhe)。但(dan)對(dui)外(wai)的(de)幹(gan)擾(rao)的(de)時(shi)域(yu)波(bo)形(xing)還(hai)是(shi)相(xiang)同(tong)的(de)
，並(bing)不(bu)一(yi)定(ding)隨(sui)機(ji)調(tiao)製(zhi)的(de)電(dian)源(yuan)就(jiu)優(you)於(yu)固(gu)定(ding)頻(pin)率(lv)調(tiao)製(zhi)的(de)電(dian)源(yuan)。