scholarly journals Cheap Conic OPF Models for Low-Voltage Active Distribution Networks

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 99691-99708
Author(s):  
Muhammad Usman ◽  
Andrea Cervi ◽  
Massimilano Coppo ◽  
Fabio Bignucolo ◽  
Roberto Turri
Keyword(s):  
Low Voltage ◽  
Distribution Networks ◽  
Active Distribution Networks

scholarly journals Accurate Assessment of Decoupled OLTC Transformers to Optimize the Operation of Low-Voltage Networks

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2173
Author(s):  
Álvaro Rodríguez del Nozal ◽  
Esther Romero-Ramos ◽  
Ángel Luis Trigo-García
Keyword(s):  
Distributed Generation ◽  
Optimization Problem ◽  
Low Voltage ◽  
Optimal Solution ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Rigorous Approach ◽  
Tap Changer ◽  
Load Tap Changer ◽  
Active Distribution Networks

Voltage control in active distribution networks must adapt to the unbalanced nature of most of these systems, and this requirement becomes even more apparent at low voltage levels. The use of transformers with on-load tap changers is gaining popularity, and those that allow different tap positions for each of the three phases of the transformer are the most promising. This work tackles the exact approach to the voltage optimization problem of active low-voltage networks when transformers with on-load tap changers are available. A very rigorous approach to the electrical model of all the involved components is used, and common approaches proposed in the literature are avoided. The main aim of the paper is twofold: to demonstrate the importance of being very rigorous in the electrical modeling of all the components to operate in a secure and effective way and to show the greater effectiveness of the decoupled on-load tap changer over the usual on-load tap changer in the voltage regulation problem. A low-voltage benchmark network under different load and distributed generation scenarios is tested with the proposed exact optimal solution to demonstrate its feasibility.

scholarly journals Prosumer’s impact on low voltage distribution networks

2019 ◽  
Vol 290 ◽  
pp. 01021
Author(s):  
Sorin Dan Volosciuc ◽  
Monica Elena Dragosin
Keyword(s):  
Distributed Generation ◽  
Electricity Generation ◽  
Low Voltage ◽  
Electric Energy ◽  
Distribution Networks ◽  
Local Power ◽  
Advantages And Disadvantages ◽  
Technical Requirements ◽  
Active Distribution Networks

The use of renewable energy, within nowadays energy policy, has increased considerably all over the world in order to respond to the increasing energy consumption and to reduce the environmental impact of the electricity generation. At the beginning, the relatively low penetration levels of distributed generation does not produce problems, however, the nowadays massive increase of local power generation have led to new integration challenges in order to ensure the reliability and quality of the power supply. This paper also highlights some aspects regarding the use of the active distribution networks of low voltage to which electric energy producers are connected-the prosumers: advantages and disadvantages for the consumer and for the supplier, technical requirements for connection, identification of the problems of power quality.

scholarly journals Modeling and Synchronization Stability of Low-Voltage Active Distribution Networks With Large-Scale Distributed Generations

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 70989-71002 ◽  
Author(s):  
Hong Zhou ◽  
Shi Chen ◽  
Jingang Lai ◽  
Xiaoqing Lu ◽  
Chang Yu ◽  
...  
Keyword(s):  
Large Scale ◽  
Low Voltage ◽  
Distribution Networks ◽  
Distributed Generations ◽  
Active Distribution Networks

A composite power quality index for low-voltage active distribution networks

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Karthik Thirumala ◽  
Jayaprakash Budhavarapu ◽  
Hari Babu Devara
Keyword(s):  
Power Quality ◽  
Power Supply ◽  
Quality Index ◽  
Low Voltage ◽  
Preliminary Investigation ◽  
Weighted Average ◽  
Distribution Networks ◽  
System Frequency ◽  
Active Distribution Networks

Abstract In active distribution networks, it is a challenging task for the utility and system operators to identify and analyze the power quality (PQ) disturbance and its cause. Likewise, the consumers are curious about the quality of power supply being provided and the economic impacts of low PQ. Thus, continuous monitoring of the overall quality of the power at the consumer end has become a significant concern in distribution networks. This paper presents a new composite power quality index (CPQI) for low-voltage distribution networks. The CPQI is formulated as a weighted average of five basic parameters, namely voltage level, current harmonic quality, voltage harmonic quality, power factor, and system frequency. The main emphasis is on quantifying the overall quality of the power supply under different PQ disturbance conditions. The CPQI estimate helps in a preliminary investigation of tracking the low PQ location and its source. The proposed CPQI is evaluated on a variety of simulated signals obtained from a CIGRE low-voltage microgrid network. Furthermore, the formulated CPQI is investigated on a LabVIEW-based virtual instrumentation platform with LED loads. It is interpreted from the results that the proposed CPQI is able to evaluate the overall PQ at a load terminal with diverse load conditions subjected to different power quality disturbances.

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