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Scalable Dc Microgrids for Rural Electrification

Thesis Info

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Author

Nasir, Mashood

Program

PhD

Institute

Lahore University of Management Sciences

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Electrical Engineering

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10360/1/Mashood%20Nasir_EE_2018_LUMS_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727828543

Similar


Access to electricity is one of the key factors indicating the socio-economic status of any community. Reliable and adequate provision of electricity is mandatory for improved standards of living including better health, education, transport, agriculture and employment opportunities. Unfortunately, according to International Energy Agency, over 1.1 billion people around the world lack access to any electricity out of which 85 percent reside in rural areas of developing world. Electrification of these remote rural communities through national grid interconnection is not economically feasible for many developing countries due to high cost associated with the development of generation, transmission and distribution infrastructure. Alternatively, DC microgrids implemented with distributed generation and low voltage distribution are becoming very popular for low cost rural electrification. However, current implementations are largely suboptimal due to high distribution losses associated with their centralized architecture and their inability to support high power community loads. In this work, a novel distributed DC microgrid architecture which allows a scalable approach with minimal upfront investment to fulfill rural electricity needs along with the provision of higher powers for communal loads and beyond subsistence provisioning of electrical power is proposed. The architecture is capable to work entirely on solar energy with power delivery capability to individual consumers and added inherent ability to integrate resources to power up larger loads for communal/commercial applications. The proposed microgrid architecture consists of a cluster of multiple nanogrids (households), where each nanogrid has its own PV generation and battery storage along with bi-directional connectivity to the microgrid. Thus, each nanogrid can work independently in islanded mode along with the provision of sharing its resources with the community through the bidirectional converter. In the proposed architecture, the bi-directional power flow capability is implemented through a modified flyback converter. A decentralized control methodology is also proposed to ensure a communication-less, yet coordinated control among the distributed resources in multiple nanogrids. The microgrid is evaluated for optimal distribution voltage level, conductor size and interconnection scheme between nanogrids using Newton-Raphson analysis modified for DC power flow. Various scenarios for power sharing among the contributing nanogrids and communal load power allocation are analyzed from operation and control prospective to validate the architecture and its performance. Further, an optimal framework for the planning of distributed generation and storage resources in each nanogrid with respect to time varying profiles of region-specific temperature and irradiance is also presented to ensure the better resource utilization. A scaled version of the proposed architecture is implemented on hardware, while the efficacy of control methodology is validated on MATLAB/Simulink and hardware in loop facilities at microgrid laboratory in Aalborg University. The proposed distributed architecture along with decentralized control can be considered as a promising solution for the future rural electrification implementations in developing regions.
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امام خمینی

امام خمینی
حق مغفرت کرے عجب آزاد مرد تھا
انقلاب ایران کے تاریخ ساز قائد، ایران میں اسلامی جمہوریہ کے بانی، روحانی پیشوا اور عالمِ اسلام کے ایک عظیم فرزند علامہ روح اﷲ آیت اﷲ خمینی مرحوم ۳؍جون بروز شنبہ کواپنی علالت اورآپریشن میں ناکامی کے بعد بالآخر وہاں پہنچ گئے جہاں ہم میں سے ہرایک کوایک دن جانا ہے۔ اِنَّالِلّٰہِ وَاِنَّا اِلَیْہِ راجِعُوْن۔علامہ خمینی کے انتقال کی خبر سے مسلم ممالک میں صفِ ماتم بچھ گئی، موت اَٹل اوربَرحق ہے اور یہ تلخ گھونٹ ہر متنفّس کواپنے وقت پر پینا ہے۔’’کل نفسٍ ذائقۃُ الموت‘‘ اور ’’اِذَا جَآء اجُلُھَا لَا ےَسْتَاخِرُون ساعۃ وَلَا یستقدمون ‘‘ فرمان الٰہی ہے۔
تاہم اس کار گاہِ ہستی میں بعض شخصیات ایسی بھی پیدا ہوتی ہیں، جن کے دنیا سے اُٹھ جانے کے بعد جوخلاء پیداہوتا ہے،اس کاپُر ہونا ممکن نہیں ہوتا ہے۔ یہ حقیقت ہے کہ موجودہ صدی میں جن اہم شخصیات نے جدید تاریخ پرگہرے نقوش واثرات چھوڑے ہیں، اور ایک لمبی مدت تک جن کی یاد باقی رکھی جائے گی ان میں مرحوم رہنما کی انقلاب آفریں ذات بھی شامل ہے۔
بلاشبہ علامہ خمینی کے انتقال سے سیاسی بالغ نظری، جرأت،بے باکی انقلاب، عزم اور خودداری کے ایک دور کاخاتمہ ہوگیا، علامہ خمینی اپنی ذاتی خصوصیات اوصاف اور کمالات کے اعتبار سے ایک پُرکشش، باوضع اوربھاری بھرکم شخصیت کے مالک تھے ان کے بعض عقائد وافکار ونظریات ،سیاسی سوچ و اپروچ اور طریقِ کارسے جمہوری اختلاف کے باوجود ان کی اصول پسندی، جذبۂ حرّیت ،ایثار وقربانی اور جدوجہد کی تعریف کیے بغیر چارۂ کار نہیں ہے۔
علامہ آیت اﷲ خمینی ۱۹۰۰ء میں شمالی ایران کے جران نامی ایک قصبہ خمین میں پیدا ہوئے، کل عمر ۸۹؍ سال کی پائی، بچپن سے ہی آپ کی تعلیم وتربیت ایک خاص ماحول میں ہوئی۔آپ نے اسلامیات ،دینیات ،فقہ اور فلسفہ کے شعبوں...

Benazir Bhutto and the Challenge and Response Theory

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