Rail

Txheej txheem cej luam

Rail transit traction fais fab mov system siv rectifier units los muab DC fais fab rau EMUs, yog li harmonics yog inevitable.Thaum cov ntsiab lus sib haum xeeb tshaj qhov ntau yam, nws yuav ua rau muaj kev puas tsuaj rau lub zog hauv nroog.Tsis tas li ntawd, teeb pom kev zoo, UPS, elevator feem ntau tsim 3, 5, 7, 11, 13 thiab lwm yam kev sib haum xeeb.Thiab lub zog load yog loj, thiab lub zog reactive yog loj heev.

Harmonics ua rau kev tiv thaiv relay thiab cov khoom siv tsis siv neeg ntawm lub zog ua haujlwm tsis zoo lossis tsis kam ua haujlwm, uas cuam tshuam ncaj qha rau kev nyab xeeb ntawm daim phiaj hluav taws xob;ua rau ntau yam khoom siv hluav taws xob los ua kom muaj kev poob thiab cua sov ntxiv, thiab ua rau lub cev muaj zog ua kom muaj kev vibration thiab suab nrov.Lub harmonic tam sim no nyob rau hauv daim phiaj fais fab.raws li ib yam ntawm lub zog, nws thiaj li yuav tau noj ntawm cov kab thiab ntau yam khoom siv hluav taws xob, yog li ua rau poob, ntau reactive zog thiab harmonics, ua rau muaj zog transformer losses thiab txo efficiency, thiab yuav tsum tau ua ke mus rau high-voltage sab, ua rau ntau loj. -scale fais fab tsis zoo teeb meem.

Cov khoom siv teeb pom kev zoo, UPS, kiv cua, thiab lub elevator tsim kom muaj kev sib haum xeeb, ua rau muaj qhov tsis sib haum xeeb.Nyob rau tib lub sijhawm, cov kev sib haum xeeb tam sim no yuav raug txuas mus rau sab high-voltage los ntawm lub transformer.Tom qab lub lim dej ua haujlwm (HYAPF) tau teeb tsa, lub lim yuav tsim cov khoom siv tam sim no nrog tib lub amplitude tab sis qhov sib txawv ntawm cov ces kaum mus rau qhov pom kev sib haum xeeb.Daim phiaj hluav taws xob yog offset nrog load harmonics kom ua tiav lub hom phiaj ntawm kev lim dej thiab ntxuav cov kab hluav taws xob, uas tuaj yeem txo qhov tsis ua haujlwm ntawm cov khoom siv.Cov ntxaij lim dej muaj zog muaj kev ua tau zoo dua li cov lim dej tsis zoo, tuaj yeem them nyiaj rau kev sib haum xeeb, thiab tsis tshua muaj kev cuam tshuam.

Scheme drawing reference

1591170344811061

Cov neeg siv khoom

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