Single phase grid connection system-Design of photovoltaic systems-NPTEL-NATIONAL PROGRAMME ON TECHNOLOGY ENCHANCED LEARNING-INDIA

LINK
https://www.youtube.com/channel/UC5lfb08DKO5JYn_wsd6gu1g/videos

Digital Communication Electronics and Communication Engineering Hanyang University-Author: Haewoon Nam

Operation and Control Strategy of a New Hybrid ESS-UPS with Function of Demand Management and Emergency Power Supply- Kim, Sang Jin-The Graduate School of Industry and Engineering Seoul National University of Science and Technology

Operation and Control Strategy of a New Hybrid ESS-UPS with Function of Demand Management and Emergency Power Supply Kim, Sang jin (Supervisor Choi, Se Wan) Dept. of Electrical and Instrumentation Eng. The Graduate School of Industry and Engineering Seoul National University of Science and Technology

This paper proposes a hybrid energy storage system (ESS) that integrates an ESS with an on-line uninterruptible power supply (UPS). The power conversion system (PCS) cost of the proposed hybrid ESS-UPS is reduced, and battery utilization is increased by using the energy of the integrated battery for both demand management and emergency power supply. Further, unlike the conventional on-line UPS, the proposed hybrid ESS-UPS is capable of supplying emergency power to two types of critical loads, voltage-frequency independent (VFI) load and voltage-frequency dependent (VFD) load. A seamless mode transfer algorithm of the ac-dc converter is proposed for supplying uninterruptible power to the VFD load as well. In addition, an autonomous and seamless mode transfer algorithm of the bidirectional dc-dc converter is proposed to minimize the transient across the dc-link that could affect the power quality of the VFD load and the VFI load at the mode transition. To validate the proposed control scheme, experimental results from a 5 kW prototype are provided.
LINK
https://www.mediafire.com/file/rx58cvuqnhm1r5f/Operation_and_Control_Strategy_of_a_New_Hybrid_ESS-UPS.pdf/file

Design of Controller for Hybrid UPS with Energy Storage System Function Author Oh, Jin Hong School of Electrical Engineering and Computer Science, Graduate School of Chungbuk National University Cheongju, Korea

Design of Controller for Hybrid UPS with Energy Storage System Function Author Oh, Jin Hong School of Electrical Engineering and Computer Science, Graduate School of Chungbuk National University Cheongju, Korea

 A thesis for the degree of Master in August 2018

Abstract
With the active technological development of modern communication systems, advanced medical equipment, advanced living facilities, and emergency systems that requires high-quality energy are more and more widespread used in everyday life, which require more reliable, efficient, and uninterrupted electricity supply. Due to increase of these critical loads, a power supply with high quality and reliability is more important than ever. Consequently, Uninterruptible Power Supply(UPS) has recently experienced a growing demand. According to the International Electrotechnical Commission Standard IEC 62040-3, the UPS systems are categorized into on-line UPS, off-line UPS, line interactive UPS according to the energy flow direction under normal utility condition. Among them, The on-line UPS is receiving more intention from the researchers and engineers because of its outstanding capability of suppressing grid frequency variation, voltage irregularity and other power issues. However, because the stored energy of UPS battery is used only when these issues happen, battery utilization rate is very low. Therefore, hybrid UPS that integrates ESS with an on-line UPS has recently developed. Unlike the conventional UPS, hybrid UPS can increase battery utilization rate by using the stored energy of battery when the grid is under normal operation. whereas when the grid fails, hybrid UPS has to supplies emergency power to critical loads. Therefore, transient voltage across the DC-link that could affect the power quality of critical loads can occur during mode transition. this paper addresses new operation strategy of three phase hybrid UPS with Energy Storage System(ESS) function to minimize the transient voltage across the DC-link. PSCAD/EMTDC software is used to verify validity of the proposed operation scheme.

LINK
https://www.mediafire.com/file/lyxxcnyvv9nbwrl/Design_of_Controller_for_Hybrid_UPS_with_Energy_Storage.pdf/file

Microgeração residencial: um estudo de caso para um sistema fotovoltaico em Belo Horizonte – MG-Autor Adriano Jose Pinto Pinheiro-UNIVERSIDADE FEDERAL DE SANTA MARIA -BRASIL

Microgeração residencial: um estudo de caso para um sistema fotovoltaico em Belo Horizonte – MG
Autor Adriano Jose Pinto Pinheiro-UNIVERSIDADE FEDERAL DE SANTA MARIA

 A produção de energia elétrica através de instalações de pequena escala, conhecida como microgeração, apresenta um forte potencial para a redução da fatura de energia atual e, simultaneamente, contribui para a redução de gases que provocam o efeito estufa. Desde 17 de abril de 2012, quando entrou em vigor a Resolução Normativa ANEEL nº 482/2012, o consumidor brasileiro pode gerar sua própria energia elétrica a partir de fontes renováveis ou cogeração qualificada e inclusive fornecer o excedente para a rede de distribuição de sua localidade. Trata-se da micro e da minigeração distribuídas de energia elétrica, inovações que aliam economia financeira, consciência socioambiental e autossustentabilidade. O presente trabalho tem por objetivo apresentar as tecnologias atuais para implantação da microgeração no setor residencial, sendo estas, tecnologias de Microturbinas, Micro Centrais Hidrelétricas, Painéis Solares Fotovoltaicos e Aerogeradores de Pequeno Porte. Também será apresentado um estudo de caso de uma usina solar fotovoltaica implantada em uma residência na cidade de Belo Horizonte.
LINK:https://repositorio.ufsm.br/bitstream/handle/1/12564/TCCE_EEAPP_EaD_2017_PINHEIRO_ADRIANO.pdf?sequence=1&isAllowed=y