Volume 61 Issue 2 (2011) - Годишник на ТУ - София - Технически ...

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Годишник на Технически Университет - София, т. 61, кн.2, 2011Proceedings of the Technical University - Sofia, v. 61, book 2, 201116. Владимир Лазаров, Захари Зарков, Людмил Стоянов, Християн Кънчев . . . . . . . . . 153Изследване на възможностите за компенсиране на флуктуациите на мощносттана ветрогенератор със суперкондензатори17. Ганчо Божилов, Антоанета Тодорова . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163Термична дълготрайност на електрическата изолация при отрицателнитемператури18. Ганчо Божилов. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169Компютърни задачи в електрическите машини19. Милко Йовчев, Димитър Попов, Петьо Гаджанов, Виктория Попова . . . . . . . . . . . . . 179ТЕЦ с нулеви емисии - съвместимост на postcombution-технологиите за редуциранена въглеродните емисии от тец с директива 1996/61 на европейскиясъюз20. Йордан Марков, Даниела Минковска . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189Функционални изисквания при проектиране на комуникационен модул в GPSсистема21. Георги Найденов . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197Изследване на варианти за изграждане на виртуални частни мрежи22. Евдокия Димитрова . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207Изследване на честотното асинхронно пускане на синхронните турбогенератори23. Евдокия Димитрова . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215Оптимизация на честотното асинхронно пускане24. Илияна Найденова . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221Изследване на влиянието на различните реакционни пътища върху подробнотокинетично моделиране на окислението на ацетилен© 2011 Publishing House of Technical University of Sofia4All rights reserved ISSN 1311-0829
Годишник на Технически Университет - София, т. 61, кн.2, 2011Proceedings of the Technical University - Sofia, v. 61, book 2, 2011CONTENTS volume 61, Issue 2MATHEMATICS, ELECTRICAL ENGINEERING, POWER ENGINEERING, COMMUNICATIONS1. Ivan Trendafilov, Dimitrinka Vladeva . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Endomorphism Semirings Without Zero of a Finite Chain2. Ivan Trendafilov, Dimitrinka Vladeva. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Endomorphism Semirings Without Zero of a Finite Semilattice of a Special Type3. Mariana Durcheva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Public Key Cryptosystem Based on Endomorphism Semirings of a Finite Semilatticeof a Special Type4. Bogdan Gilev. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39“Memorizing” of Functions Using Minimum Number of Points and SubdivisionSchemes5 Iasen Todorov, Marin Ivanov, Dejan Andonov, Dimo Stoilov, Rad Stanev. . . . . . . . . . . . . . 47Study of Steady State Operation Modes of a Power Distribution Network IncorporatingWind Generators6 Kiril Stoykov, Stefan Staykov, Kalinka Todorova. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Furnace Transformers - Characteristics, part 17. Kiril Stoykov . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Some Problems in Voltage Control of Furnace Transformers with Power Lower1000 kVa8. Peter Dineff, Dilyana Gospodinova, Ivalina Avramova, Todorka Vladkova,Carmen Gaidau . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77Investigation on Dielectric Barrier Discharge Surface Activation Effects - part 19. Peter Dineff, Dilyana Gospodinova, Ivalina Avramova, Todorka Vladkova,Carmen Gaidau . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85Investigation on Dielectric Barrier Discharge Surface Activation Effects - part 210. Рeter Dineff, Dilyana Gospodinova, Rajna Tzeneva. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95Magnetic Stimulated Dielectric Barrier Discharge to Terms of Longitudinal MagneticIsolation11. Iliana Marinova, Aneliya Terzova, Valentin Mateev . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105Shape Determination of Magnetic Core by Genetic Algorithm12. Valentin Mateev, Iliana Marinova, Aneliya Terzova . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113Transient Electromagnetic Modeling of Electromagnetic System13. Raina Tzeneva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123Modeling of Skin and Proximity Effects14. Vladimir Lazarov, Zahari Zarkov, Ludmil Stoyanov, Dimitar Sprirov. . . . . . . . . . . . . . . . . 133Maximum Power Operation of Wound Rotor Asynchronous Machine for WindGenerator15. Vladimir Lazarov, Zahari Zarkov, Ludmil Stoyanov, Hristiyan Kanchev . . . . . . . . . . . . . . 143Experimental Testing of Suprecapacitors and Evaluation of their Parameters© 2011 Publishing House of Technical University of Sofia5All rights reserved ISSN 1311-0829
Page 1 and 2: ISSN 1311-0829ГОДИШНИК НА
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Page 10 and 11: • If a neutral element 1 of the s
Page 12 and 13: Proof. (i) Since for arbitrary ≀
Page 14 and 15: )is the endomorphism ≀ 0, . . . ,
Page 16 and 17: ∣∣E (k)C n∣ ∣∣ =Propositi
Page 18 and 19: For k = 0 and s = 1 from the last p
Page 20 and 21: Facts concerning semilattices can b
Page 22 and 23: described by the following join-tab
Page 24 and 25: Finally we observe{aj , if i = k(f
Page 26 and 27: Let us consider the endomorphisms f
Page 28 and 29: Proposition 3.8 For any n ≥ 2 in
Page 30 and 31: Cryptographic protocols based on DL
Page 32 and 33: 2.5 Bi-Semigroup Action Problem (BS
Page 35 and 36: Theorem 4.5 [14]. In the center of
Page 37 and 38: The only way we know for an attacke
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Page 41 and 42: The exact definitions of points and
Page 43 and 44: FirstIterationSecondIterationx 0 0
Page 45 and 46: * x4. Order of approximationBecause
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Page 49 and 50: генератори, присъе
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№ РежимТабл.4.1 Бала
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Годишник на Технич
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Табл.11 2 3 4 5 6 7Загуби
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оцени разхода на ак
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сформатора се нала
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-да допуска претова
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-големи трудности п
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трансформаторът се
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При известно фазов
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KU BHOCHR (12)w w wЗа да се
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aided impregnation of wood and wood
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different as a result of the differ
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Table 2. Carbon peak C s1 component
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esults indicating that the reductio
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Change of Mass M, %100-10-20-30-40
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However, the correlation between re
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Electrical Apparatus and Technologi
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- преходът към стри
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или магнитно изоли
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от лист електротех
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Фиг. 6. Изменение на
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Fig.1 Block structure of proposed o
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Fig.4. Initial and best shape of po
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Fig.8 Calculated initial cogging to
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Octave/Lua interface is a Matlab to
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pends on the results of the thermal
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4. ResultsAs it has been mentioned
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A DC electromagnetic actuators with
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ращ се наблизо пров
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Фиг. 4. Зависимост н
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че максималната то
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3.7. Ефект близост в
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11 c x6T 2 c3c4c5ec p c1c , (2)
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От кривата на макси
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109.598.5Wind speed, m/s87.576.565.
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6. ЗаключениеВ стат
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Фиг.1. Заместваща сх
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където t е времето м
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Бяха проведени и ек
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Представени са рез
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Фиг.3. Архитектури н
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P SC_refP batP WP HGP storP bat_ref
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1500Фиг.9. Модел в Matlab/
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Isc, AVsc, V50403020100-10-20-30-40
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шаване на температ
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При променлив темп
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2. Примерни компютъ
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3.3. Изследване на фо
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алгебра. За целта с
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3.13. Изчисляване на
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Количеството на от
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(CaSO 4 .2H 2 O) (фиг. 3). То
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работят всички инс
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(НДНТ), което за Бъл
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Communications software and hardwar
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puter is running virtualization sof
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execution to the dispatcher applica
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Тунелирането скрив
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управление на ресу
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Фиг.6: Симулационен
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tunnel source 1.1.1.1tunnel destina
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При отворена вериг
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Таблица 3Задвижващ
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Фигура 3.При съотно
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Необходимо е така д
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yследователно:( k )UOsi
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Laskin and Wang presented a detaile
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Figure 2: Temperature dependence of
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An additional analysis obtained at
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