Rail

Rail transit traction power supply system inoshandisa rectifier units kupa DC simba kuEMUs, saka harmonics haidzivisike.Kana iyo harmonic yemukati ichipfuura imwe nhanho, inogona kukonzera kukuvadza kune wedhorobha simba system.Mukuwedzera, mwenje, UPS, elevator inonyanya kuburitsa 3, 5, 7, 11, 13 uye mamwe maharmonics.Uye simba remutoro rakakura, uye iro reactive simba rakakura zvakare.

Harmonics inokonzera kuchengetedza relay uye otomatiki zvishandiso zvemagetsi system kusashanda kana kuramba kushanda, izvo zvinokanganisa zvakananga kushanda kwakachengeteka kwegedhi remagetsi;inokonzeresa midziyo yemagetsi yakasiyana siyana kuti iwedzere kurasikirwa uye kupisa, uye inoita kuti mota ibudise mechini vibration uye ruzha.Iyo harmonic ikozvino iri mumagetsi emagetsi.semhando yesimba, inozopedzisira yapedzwa pamitsetse uye akasiyana midziyo yemagetsi, nekudaro ichiwedzera kurasikirwa, yakawandisa reactive simba uye harmonics, zvichikonzera kuwedzera kurasikirwa kwetransformer uye kuderera kwekushanda, uye ichabatanidzwa kune yakakwira-voltage divi, zvichikonzera mamwe Makuru. -kuyera matambudziko emhando yemagetsi.

Midziyo yekuvhenekesa, UPS, mafeni, uye zvikwiriso zvinogadzira maharonic currents, zvichikonzera kukanganisa kwemagetsi.Panguva imwecheteyo, iyo harmonic currents ichabatanidzwa kune yakakwirira-voltage side kuburikidza ne transformer.Mushure meiyo inoshanda sefa (HYAPF) yaiswa, iyo sefa ichagadzira ikozvino inodzosera ine amplitude yakafanana asi yakatarisana nechikamu angles kune yakaonekwa harmonics.Iyo giredhi yemagetsi inogadziriswa pamwe nemutoro harmonics kuti uwane chinangwa chekusefa uye kuchenesa gidhi remagetsi, iro rinogona kunyatso kudzikisa kutadza kwemidziyo.Active magetsi mafirita ane kuita kurinani pane echinyakare passive mafirita, anogona dynamically kutsiva harmonics, uye haanyanye kuita resonance.