New breed of solid-state transformer distribution tail system for flexible power conversion between medium-voltage distribution and low-voltage customer side

2016 ◽  
Author(s):  
Chuang Liu ◽  
Yuemei Zhi ◽  
Yue Zhang ◽  
Guowei Cai
Keyword(s):  
Solid State ◽  
Low Voltage ◽  
Power Conversion ◽  
Voltage Distribution ◽  
Solid State Transformer ◽  
Medium Voltage ◽  
Distribution Tail

Reduction of the Low Voltage Substation Constraints by Inserting Photovoltaic Systems in Underserved Areas

2019 ◽  
Vol 12 (2) ◽  
pp. 105-112
Author(s):  
Benbouza Naima ◽  
Benfarhi Louiza ◽  
Azoui Boubekeur
Keyword(s):  
Low Voltage ◽  
Voltage Drop ◽  
Electrical Energy ◽  
Utilization Rate ◽  
Photovoltaic Systems ◽  
Voltage Distribution ◽  
Medium Voltage ◽  
Pv Systems ◽  
Transformer Substation ◽  
Load Pattern

Background: The improvement of the voltage in power lines and the respect of the low voltage distribution transformer substations constraints (Transformer utilization rate and Voltage drop) are possible by several means: reinforcement of conductor sections, installation of new MV / LV substations (Medium Voltage (MV), Low Voltage (LV)), etc. Methods: Connection of mini-photovoltaic systems (PV) to the network, or to consumers in underserved areas, is a well-adopted solution to solve the problem of voltage drop and lighten the substation transformer, and at the same time provide clean electrical energy. PV systems can therefore contribute to this solution since they produce energy at the deficit site. Results: This paper presents the improvement of transformer substation constraints, supplying an end of low voltage electrical line, by inserting photovoltaic systems at underserved subscribers. Conclusion: This study is applied to a typical load pattern, specified to the consumers region.

scholarly journals Performance Analysis of Topologies for Autonomous Hybrid Microgrids in Remote Non-Interconnected Communities in the Amazon Region

2020 ◽  
Vol 13 (1) ◽  
pp. 44
Author(s):  
Julio Martinez-Bolaños ◽  
Vinícius Silva ◽  
Mariana Zucchi ◽  
Raphael Heideier ◽  
Stefania Relva ◽  
...  
Keyword(s):  
Low Voltage ◽  
Power Conversion ◽  
Brazilian Amazon ◽  
Amazon Region ◽  
Optimal Topology ◽  
Power Losses ◽  
Voltage Distribution ◽  
Brazilian Amazon Region ◽  
Isolated Communities ◽  
Detailed Computer

This work presents a detailed comparative analysis of dispersed versus centralized Alternating Current (AC)-coupling topologies and AC-coupling versus Direct Current (DC)-coupling topologies in autonomous Photovoltaic (PV)-diesel-battery microgrids for remote/isolated communities in the Brazilian Amazon region. The comparison concerned the power losses occurring in power conversion devices and in a low-voltage distribution network by using the balance-of-system (BOS) efficiency as a performance index. The analyses were performed by an analytical approach and by detailed computer simulations in MATLAB/Simulink software. Based on the matching factor (MF), the gain obtained in BOS efficiency is 1.5% for low values of the MF, and for high values of the MF, the centralized topology has the same BOS efficiency as the dispersed topology. In conclusion, this factor proved to be useful as a design parameter for selecting the optimal topology of a PV-diesel-battery microgrid.

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