scholarly journals Load Forecasting in Electrical Distribution Grid of Medium Voltage

2016 ◽  
pp. 340-349 ◽  
Author(s):  
Svetlana Chemetova ◽  
Paulo Santos ◽  
Mário Ventim-Neves
Keyword(s):  
Load Forecasting ◽  
Distribution Grid ◽  
Medium Voltage ◽  
Electrical Distribution

scholarly journals Improving PV Resilience by Dynamic Reconfiguration in Distribution Grids: Problem Complexity and Computation Requirements

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 830
Author(s):  
Filipe F. C. Silva ◽  
Pedro M. S. Carvalho ◽  
Luís A. F. M. Ferreira
Keyword(s):  
Distributed Generation ◽  
Optimal Solution ◽  
Dynamic Reconfiguration ◽  
Scheduling Problem ◽  
Low Carbon ◽  
Distribution Grid ◽  
Medium Voltage ◽  
Classical Computing ◽  
The Impact ◽  
Distribution Grids

The dissemination of low-carbon technologies, such as urban photovoltaic distributed generation, imposes new challenges to the operation of distribution grids. Distributed generation may introduce significant net-load asymmetries between feeders in the course of the day, resulting in higher losses. The dynamic reconfiguration of the grid could mitigate daily losses and be used to minimize or defer the need for network reinforcement. Yet, dynamic reconfiguration has to be carried out in near real-time in order to make use of the most updated load and generation forecast, this way maximizing operational benefits. Given the need to quickly find and update reconfiguration decisions, the computational complexity of the underlying optimal scheduling problem is studied in this paper. The problem is formulated and the impact of sub-optimal solutions is illustrated using a real medium-voltage distribution grid operated under a heavy generation scenario. The complexity of the scheduling problem is discussed to conclude that its optimal solution is infeasible in practical terms if relying upon classical computing. Quantum computing is finally proposed as a way to handle this kind of problem in the future.

Low Voltage Sensing and Control Applied to the Electrical Distribution Grid

2021 ◽  
Author(s):  
Tiago R. Chaves ◽  
Marcos A. Izumida Martins ◽  
Renata Callegaro ◽  
Diego Henrique Nunes ◽  
Kennedy A. Martins ◽  
...  
Keyword(s):  
Low Voltage ◽  
Distribution Grid ◽  
Voltage Sensing ◽  
Electrical Distribution ◽  
And Control

scholarly journals OPTIMASI PEMASANGAN KAPASITOR PADA SISTEM JARINGAN LISTRIK DISTRIBUSI DI BALI MENGGUNAKAN METODE QUANTUM GENETIC ALGORITHM

2019 ◽  
Vol 6 (1) ◽  
pp. 96
Author(s):  
Maria Gusti Agung Ayu Permata ◽  
Antonius Ibi Weking ◽  
Widyadi Setiawan
Keyword(s):  
Genetic Algorithm ◽  
Power Factor ◽  
Power Loss ◽  
Grid System ◽  
Distribution Grid ◽  
Quantum Genetic Algorithm ◽  
Medium Voltage ◽  
Genetic Algorithm Method ◽  
The Impact

This study optimized the installation of capacitors on the distribution grid system in Penyabangan feeder, Singaraja, Bali using the Quantum Genetic Algorithm method to reduce the impact of increasing reactive currents. This feeder, consisting of 162 buses in which 62 buses are directly connected to the load and 5 buses are connected to medium voltage cosumers. The results of this study are obtained by the capacity of capacitors installed in 31 buses that have a power factor value less than the permitted limit and the power loss values decrease from 0,0674 MW and 0,0546 MVAr to 0,0543 MW and 0,0442 MVAr.

The Design of Filter Parameters of Dynamic Voltage Restorer in Medium Voltage Network

2014 ◽  
Vol 654 ◽  
pp. 133-141 ◽  
Author(s):  
Sen Jing Yao ◽  
Zheng Guo Zhu ◽  
Hua Ying Zhang ◽  
Jun Wei Cao ◽  
Guang Yi Zhang
Keyword(s):  
Design Method ◽  
Theoretical Expression ◽  
Distribution Grid ◽  
Engineering Project ◽  
Dynamic Voltage Restorer ◽  
Voltage Unbalance ◽  
Medium Voltage ◽  
Voltage Compensator ◽  
Dynamic Voltage ◽  
Output Filter

Dynamic Voltage Compensator (DVR) is able to handle the dynamic power quality problems in distribution network, such as voltage sags and voltage unbalance, and the parameters of the output filter will have important affect on the compensation results. In this paper, the parameter design method of the output filter of a cascaded H-bridge based DVR applied in medium-voltage distribution grid is studied. Through the analysis of the case when filter inductor current has the maximum value, the theoretical expression of the relationship between the low limit of the value of filter inductor and the capability of voltage compensation and power factor is derived. Meanwhile, the method of selecting the filter capacitor value is ​​obtained. The realization of the proposed method are given by taking an engineering project as an example, the correctness and validity of the design method of filter parameters proposed in this paper are verified by simulation.

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