Kawalwatar balanci tsari na volts DC kusa da Cascaded H-Bridge Electronic Power Transformer tare da topologi na DC-Link mafi yawan cikakken tsari

     A cikin littattin, wani tattalin balancin tasirin karamin tsakiyar (tare da tasirin karamin tsakiyar na hanyar da na hukuma) ta aiki ta bayar da shiga ga abubuwan EPT da na yankin topology. An yi tattalin ya zama da shiga ga amfani da aiki a wasu modula a cikin yankin da tushen shiga. Idan an yi tattalin, za su iya lalacewa tasirin karamin tsakiyar na hanyar da na hukuma idan ana fitowa a wasu modula (kamar misali, ba da hakkin parametoru ko kuma ba da waɗannan karamin tsakiyar na hanyar da na hukuma suna shiga da energy sources ko/da kuma karamin tsakiyar). An yi tattalin da ya bincika da labarin aiki.

1.Tambayar.

    Electronic power transformer (EPT), ko kuma solid-state transformer (SST) , ko kuma power electronic transformer (PET) , ana nufin shi da maƙasun juna mai karfi don future power grid. Tana da haske masu fa'ida, kamar integration renewable energy, main power grid and AC/DC microgrid connection , regulation output voltage, harmonic suppression, reactive power compensation and fault isolation.

Don EPT na uku na shiga da karamin tsakiyar na hukuma, akwai batutuwa da suka rarrabe, kamar cascaded H-bridge EPT , modular multilevel converter (MMC) EPT  ko kuma clamping multilevel EPT . A shekarar 2012, an saka 15-kV 1.2-MVA single-phase cascaded H-bridge traction EPT a lokomotif don ya haɗe mai girma da ya zama da kyau tushen shiga da 16.67 Hz linear power transformer . A shekarar 2015, an saka 10-kV/400-V 500-kVA three-phase cascaded H-bridge EPT a distribution power grid don ya bayyana karamin tsakiyar mai kyau .

2.EPT da Yankin DC-Link Topology.

    Fig yana nuna cikakken EPT na uku da yankin DC-link topology. Yana da configuration input-series-output-parallel tare da     n     PMs per phase. The three stages are the input stage, the isolation stage and the output stage. In Fig, there are two AC ports and six DC ports. For the PM 1 in each phase, there are a high-voltage DC port and a low-voltage DC port to connect renewable energy sources and DC loads with different voltage levels.

3.An Zama Tattalin Balancin Tasirin Karamin Tsakiyar Na Hukuma Da Na Hanyar.

    Idan renewable energy sources and DC loads suna shiga da DC ports of EPT (kamar misali, DC ports A_H and A_L, shown in Fig. 1) ko kuma ba da hakkin parametoru, za su iya fitowa a wasu PMs. Idan fitowan aiki ya kawo waɗanda muke so kuɗi a kontrollofin balancin tasirin karamin tsakiyar, za su iya fitowa tasirin karamin tsakiyar. A wannan section, za a bincika renewable energy source and DC load scenario as an example. 

4.Realization of the Proposed Overall Individual DC Voltage Balance Strategy.

    An zama tattalin balancin tasirin karamin tsakiyar na hanyar da na hukuma tana da duɓu: individual high-voltage DC-link balance strategy a isolation stage and individual low-voltage DC-link balance strategy a output stage.

5.Kalmomin.

     A cikin littattin, an zama wani tattalin balancin tasirin karamin tsakiyar na hanyar da na hukuma don EPT da na yankin topology. An yi bincike da ranking balancin tasirin karamin tsakiyar na hanyar da na hukuma. Duka ranking suka nuna cewa an zama tattalin balancin tasirin karamin tsakiyar na hanyar da na hukuma da take da kyau. Wannan kalmomi an samu shi daga labarin aiki. Labarin aiki sun nuna cewa individual high-voltage and low-voltage DC-links za su iya lalacewa idan ana fitowa a wasu modula ko kuma da damar karamin tsakiyar a duk aiki. Bisa ga, idan an yi tattalin, individual high-voltage and low-voltage DC-links za su iya lalacewa idan aiki na PM suka cikin damar aiki na goma sha'awa.

Source: IEEE Xplore.

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