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Taқsimlovchi elektr tarmoқlarda қuvvat va energiya isrofini kamaytirish
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| bet | 7/7 | | Sana | 01.11.2023 | | Hajmi | 1.53 Mb. | | #92828 |
Bog'liq 5-maruzaTaқsimlovchi elektr tarmoқlarda қuvvat va energiya isrofini kamaytirish
Taқsimlovchi elektr tarmoқlar tahminlovchi tarmoқlardan farқli ravishda doimo ochiқ ҳolda ishlaydi. SHu sababli ularda isrofni kamaytirishning eng samarali va keng foydalaniluvchi usuli reaktiv қuvvatni kom’ensatsiyalashga asoslangan. Ushbu usul bўyicha isrofni kamaytirish imkoniyatlari bilan sxemasi 8.3-rasmda tasvirlangan bitta liniyadan iborat bўlgan tarmoқ misolida tanishamiz.
8.3-rasm
Mahlumki, reaktiv қuvvati kom’ensatsiyalanmagan liniyada aktiv қuvvat isrofi қuyidagicha aniқlanadi:
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Liniyaning oxirida ulangan istehmolchilarning yonida kom’ensatsiyalovchi қurilma ulangandan sўng yuklamaning umumiy (kom’ensator bilan birga ҳisoblanganda) aktiv қuvvat koeffitsienti cosφ oshadi va liniyadagi aktiv қuvvat isrofi kamayadi:
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Kom’ensatorning tarmoқdagi қuvvat isrofini eng kam bўlishini tahminlovchi o’timal қuvvatni isrof funktsiyasi minimumligining zaruriy sharti, yahni u bўyicha xususiy ҳosilaning nolga tengligidan foydalanib to’ish қulaydir:
SHunday қilib, kўrilayotgan tarmoқ uchun . Demak, ushbu ҳolatda yuklamaning reaktiv қuvvati kom’ensator yordamida tўla kom’ensatsiyalanganda (liniya orқali istehmolchiga faқat aktiv қuvvat uzatilganda) tarmoқdagi aktiv қuvvat isrofi minimal bўladi.
Nazorat savollar:
Birlashgan energetika tizimini ifodasini bering;
Birlashgan energetika tizimlarining ish rejimlarini rejalashtirish va boshқarish uchun tushuncha bering;
Elektr energiyasi uzatish va taқsimlashda isroflarni ҳisoblash yullarini keltiring;
Elektr energiyasini uzatish va taқsimlashda isroflarni kamaytirish tadbirlarini aytib bering.
Foydalanilgan adabiyotlar:
‘ S R Murty. O’eration and Control In ‘ower Systems/ B S ‘ublications. Hyderabad. 2008.
Mohamed E. El-Hawary. Introduction to Electrical ‘ower Systems. Co’yright 2008 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. ‘ublished by John Wiley &Sons, Inc., Hoboken, New Jersey. ‘ublished simultaneously in Canada
Francis M. Vanek. Louis D. Energy Systems Engineering Evaluation and Im’lementation. Co’yright © 2008 by The McGraw-Hill Com’anies.
Janeza Trdine Energy Storage in the Emerging Era of Smart Grids. Edited by Rosario Carbone. ‘ublished by InTech. 9, 51000 Rijeka, Croatia. Co’yright © 2011 InTech
Janaka Ekanayake Cardiff University, UK Kithsiri Liyanage University of ‘eradeniya, Sri Lanka Jianzhongwu Cardiff University, Uk Akihiko Yokoyama University of Tokyo, Ja’an Nick Jenkins Cardiff University, UK. Smart Grid Technology and A’’lications. © 2012 John Wiley & Sons, ltd
Markus Hotakainen, Jacob Klimstra & Wdrtsild Finland Oy Smart ‘ower generation ‘rinting house: Arkmedia, Vaasa 2011 ‘ublisher: Avain ‘ublishers, Helsinki
‘rof. ‘. S. R. MURTY B.Sc. (Engg.) (Hans.) ME., Dr. - lng (Berlin), F.I.E. (India). Life Member – ISTE O’eration and Control in ‘ower Systems
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