Yadda na Ferranti a Gasar Tashin Karamin Rijista: Me ke Yadda?

Me kuke so Ferranti Effect?

Wani Ferranti effect yana nufin ziyarwa a tsari a matsayinta masu voltage da ya fara a kan long transmission line daga tsari a matsayinta mafi girma. An fi sani aiki a wani lokaci da adadin load yana cikin hagu, ko ba a gaba (i.e. an open circuit). Ferranti effect zai iya tabbatar da shi a matsayin factor, ko kuma a matsayin fasahohi da ya zama.

A yau da kullum, a nan a lantara ne cewa a duk electrical systems current yana haɗa daga wurare na tsarin voltage mafi girma zuwa wurare na tsarin voltage mafi hagu, don bayyana electrical potential difference da ke cikin system. A duk yanayi, tsari a matsayinta mafi girma yana da tsari mafi girma da tsari a matsayinta mafi hagu saboda line losses, sabon haka current yana haɗa daga source ko supply end zuwa load.

Amma Sir S.Z. Ferranti, a shekarar 1890, ta fitaccen teori mai kyau game da medium transmission line ko long-distance transmission lines inda ake nuna cewa a lokacin light loading ko no-load operation, tsari a matsayinta mafi hagu yana da ziyarwa da tsari a matsayinta mafi girma, wanda ya jawo wani alamun da ake kira Ferranti effect in a power system.

Ferranti Effect a Transmission Line

Long transmission line zai iya zama wani abu da take da capacitance da inductance da suka ci gaba a duk fadada line. Ferranti Effect zai faru a lokacin da current da capacitance da suka ci gaba a line ya samu da yawa da current da ke cikin load a matsayinta mafi hagu (during light or no load).

Capacitor charging current yana haɗa zuwa drop a tsari a kan inductor na transmission system wanda ya fi inganci da tsari a matsayinta mafi girma. Drop a tsari yana ci gaba zuwa ziyarwa additively idan a taka zuwa matsayinta mafi hagu, kuma tsari a matsayinta mafi hagu yana da ziyarwa da tsari a matsayinta mafi girma, wanda ya jawo wani alamun da ake kira Ferranti effect in power system. A nan ake bayyana shi a cikin phasor diagram tushen.

Saboda haka, capacitance da inductance na transmission line suna da muhimmanci a kan wannan alamun. Amma Ferranti effect yana da nasarar da a cikin short transmission line saboda inductor da take da yawa a cikin line. A yau da kullum, a kan 300 Km line da take yi a frequency of 50 Hz, an samu cewa tsari a matsayinta mafi hagu yana da ziyarwa da 5% daga tsari a matsayinta mafi girma.

Idan muna bukata a bincike Ferranti effect, za a duba phasor diagrams tushen.
Yanzu, Vr yana cikin reference phasor, wanda ake nuna da OA.

Wannan yana nuna da phasor OC.

Idan muna bukata a bincike “long transmission line,” an samu cewa electrical resistance na line yana da nasarar da line reactance. Saboda haka, za a iya ɗauka cewa length of the phasor Ic R = 0; muna iya ƙunshi cewa ziyarwa a tsari yana da shi kawai saboda OA – OC = reactive drop a kan line.

Idan muna bukata a cewa c0 da L0 su ne values of capacitance da inductor per km of the transmission line, inda l yana nufin length of the line.

Saboda capacitance na long transmission line yana ci gaba a duk fadada line, average current flowing yana da shi kawai,

Saboda haka, ziyarwa a tsari saboda line inductor yana da shi kawai,

Daga equation tushen, yana da shi cewa ziyarwa a tsari a matsayinta mafi hagu yana da shi kawai saboda square of the line length, kuma saboda haka, a cikin long transmission line, yana ci gaba zuwa ziyarwa, kuma akwai lokaci da yake zama da tsari mafi girma da take bayar, wanda ya jawo wani alamun da ake kira Ferranti effect. Idan kana son sanin quiz game da Ferranti effect da abubuwan power system, za ka duba power system MCQ (Multiple Choice Questions).

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