Frequency support in deloaded pv systems / (Record no. 173609)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04854namaa22004211i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20250824125922.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250818s2024 ua a|||fr|m|| 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloguing agency | EG-GICUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GICUC |
| Modifying agency | EG-GICUC |
| Description conventions | rda |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| Language code of summary or abstract | eng |
| -- | ara |
| 049 ## - Acquisition Source | |
| Acquisition Source | Deposit |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 621.31244 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 621.31244 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.13.07.M.Sc.2024.Ib.F. |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Ibrahim Mahmoud Ibrahim Mohamed, |
| Preparation | preparation. |
| 245 10 - TITLE STATEMENT | |
| Title | Frequency support in deloaded pv systems / |
| Statement of responsibility, etc. | By Ibrahim Mahmoud Ibrahim Mohamed; Under the Supervision of Assoc. Prof. Dr. Tarek Abdelbadea Boghdady |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | دعم التردد في الأنظمة الكهروضوئية منخفضة التحميل |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2024. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 52 pages : |
| Other physical details | illustrations ; |
| Dimensions | 30 cm. + |
| Accompanying material | CD. |
| 336 ## - CONTENT TYPE | |
| Content type term | text |
| Source | rda content |
| 337 ## - MEDIA TYPE | |
| Media type term | Unmediated |
| Source | rdamedia |
| 338 ## - CARRIER TYPE | |
| Carrier type term | volume |
| Source | rdacarrier |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.)-Cairo University, 2024. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: pages 44-49. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | With the increase in demand for fossil fuels, renewable energy is being resorted to. The most popular renewable energy sources are solar and wind energy. These stations use power electronics converters. The inertia of these electronic converters is almost zero, which leads to a reduction in the total inertia of the grid. As the grid inertia decreases, it is more susceptible to frequency disturbances. When an electrical load or station enters or exits, a frequency disturbance occurs that may lead to the activation of the protection relays and the stations going out of service. <br/>In wind plants, the energy stored in the rotor is often relied upon. In solar power plants, they operate at reduced power to provide a reserve of energy that is used during the period of frequency disturbance. In literature survey, many control methods have been proposed that contribute to improve the frequency nadir, but the methods used did not significantly affect the rate of change of frequency. They also do not introduce a clear plan for how to return the stored energy to its natural state. In this thesis, a blend control is proposed to improve the frequency nadir and rate of change. It has also been modified to return safely to the normal state of stored energy. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | مع زيادة الطلب على الوقود الأحفوري فإنه يتم اللجوء إلى الطاقة المتجددة. وأشهر مصادر الطاقة المتجددة هي الطاقة الشمسية وطاقة الرياح. هذه المحطات تستخدم محولات إلكترونات القوى. عزم القصور الذاتي لتلك المحولات الإكترونية تقريبا صفر وهذا يؤدي إلى تقليل عزم القصور الكلي للشبكة. ومع انخفاض عزم الشبكة تكون أكثر عرضة للتأثر بالاضطرابات التي تحدث في التردد. فعند دخول أو خروج حمل أو محطة كهربائية يحدث اضطراب في التردد قد يؤدي إلى تفعيل مرحلات الحماية وخروج المحطات من الخدمة.<br/>في محطات الرياح يتم الاعتماد غالبا على الطاقة المختزنة في الجزء الدوار. في محطات الطاقة الشمسية يتم العمل بطاقة مخفضة لتوفير احتياطي من الطاقة يتم استخدامه في فترة اضطراب التردد. في الأبحاث السابقة تم اقتراح العديد من طرق التحكم التي تساهم في تحسن هبوط التردد ولكن الطرق المستخدمة لم تؤثر في معدل تغير التردد بشكل كبير. كما أنهم لا يضعون خطة واضحة لكيفية عودة الطاقة المختزنة لحالتها الطبيعية. في هذا الرسالة تم اقتراح متحكم هجين (تقليدي مع معدل التغير) لتحسين هبوط التردد ومعدل تغيره. كما تم تعديله للرجوع للحالة الطبيعية للطاقة المختزنة بأمان. |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Issues CD | Issued also as CD |
| 546 ## - LANGUAGE NOTE | |
| Text Language | Text in English and abstract in Arabic & English. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Generating electricity from solar radiation |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | توليد الكهرباء من الاشعاع الشمسى |
| 653 #1 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | De-load control |
| -- | Frequency Support |
| -- | Inertial response |
| -- | Photovoltaic System |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Tarek Abdelbadea Boghdady |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2024 |
| Supervisory body | Tarek Abdelbadea Boghdady |
| Discussion body | Mohamed Ahmed Moustafa Hassan |
| -- | Almoataz Youssef Abdelaziz |
| Universities | Cairo University |
| Faculties | Faculty of Engineering |
| Department | Department of Electrical Power Engineering |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Nourhan |
| Reviser Names | Eman Ghareb |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Edition | 21 |
| Suppress in OPAC | No |
| Source of classification or shelving scheme | Home library | Current library | Date acquired | Inventory number | Full call number | Barcode | Date last seen | Effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 18.08.2025 | 91616 | Cai01.13.07.M.Sc.2024.Ib.F. | 01010110091616000 | 18.08.2025 | 18.08.2025 | Thesis |