scholarly journals Multi-Party Optimal Operation for Distribution Networks Containing DC-Linked Microgrids: Integrated Network Reconfigurations and Energy Sharing

2017 ◽  
Vol 7 (11) ◽  
pp. 1194 ◽  
Author(s):  
Nian Liu ◽  
Bin Guo
Keyword(s):  
Distribution Networks ◽  
Optimal Operation ◽  
Integrated Network ◽  
Energy Sharing

scholarly journals D-PMU and 5G-Network-Based Coordination Control Method for Three-Phase Imbalance Mitigation Units in the LVDN

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2754
Author(s):  
Mengmeng Xiao ◽  
Shaorong Wang ◽  
Zia Ullah
Keyword(s):  
Mobile Networks ◽  
Control Method ◽  
Low Voltage ◽  
Control Unit ◽  
Distribution Networks ◽  
Optimal Operation ◽  
Positive Sequence ◽  
Measurement Unit ◽  
Control Units ◽  
Three Phase

Three-phase imbalance is a long-term issue existing in low-voltage distribution networks (LVDNs), which consequently has an inverse impact on the safe and optimal operation of LVDNs. Recently, the increasing integration of single-phase distributed generations (DGs) and flexible loads has increased the probability of imbalance occurrence in LVDNs. To overcome the above challenges, this paper proposes a novel methodology based on the concept of "Active Asymmetry Energy-Absorbing (AAEA)" utilizing loads with a back-to-back converter, denoted as “AAEA Unit” in this paper. AAEA Units are deployed and coordinated to actively absorb asymmetry power among three phases for imbalance mitigation in LVDNs based on the high-precision, high-accuracy, and real-time distribution-level phasor measurement unit (D-PMU) data acquisition system and the 5th generation mobile networks (5G) communication channels. Furthermore, the control scheme of the proposed method includes three control units. Specifically, the positive-sequence control unit is designed to maintain the voltage of the DC-capacitor of the back-to-back converter. Likewise, the negative-sequence and zero-sequence control units are expected to mitigate the imbalanced current components. A simple imbalanced LVDN is modeled and tested in Simulink/Matlab (MathWorks, US). The obtained results demonstrate the effectiveness of the proposed methodology.

scholarly journals Proposal of optimal operation strategy applied to water distribution network with statistical approach

2020 ◽  
Vol 15 (2) ◽  
pp. 1
Author(s):  
Alex Takeo Yasumura Lima Silva ◽  
Fernando Das Graças Braga da Silva ◽  
André Carlos da Silva ◽  
José Antonio Tosta dos Reis ◽  
Claudio Lindemberg de Freitas ◽  
...  
Keyword(s):  
Genetic Algorithms ◽  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Optimal Operation ◽  
Optimization Techniques ◽  
Experimental Techniques ◽  
Computational Optimization ◽  
Depth Analysis

 Inefficiency of sanitation companies’ operation procedures threatens the population’s future supplies. Thus, it is essential to increase water and energy efficiency in order to meet future demand. Optimization techniques are important tools for the analysis of complex problems, as in distribution networks for supply. Currently, genetic algorithms are recognized by their application in literature. In this regard, an optimization model of water distribution network is proposed, using genetic algorithms. The difference in this research is a methodology based on in-depth analysis of results, using statistics and the design of experimental tools and software. The proposed technique was applied to a theoretical network developed for the study. Preliminary simulations were accomplished using EPANET, representing the main causes of water and energy inefficiency in Brazilian sanitation companies. Some parameters were changed in applying this model, such as reservoir level, pipe diameter, pumping pressures, and valve-closing percentage. These values were established by the design of experimental techniques. As output, we obtained the equation of response surface, optimized, which resulted in values of established hydraulic parameters. From these data, the obtained parameters in computational optimization algorithms were applied, resulting in losses of 26.61%, improvement of 16.19 p.p. with regard to the network without optimization, establishing an operational strategy involving three pumps and a pressure-reducing valve.  We conclude that the association of optimization and the planning of experimental techniques constitutes an encouraging method to deal with the complexity of water-distribution network optimization.

scholarly journals Optimal operation of water distribution networks by predictive control using MINLP

Water SA ◽  
2004 ◽  
Vol 29 (4) ◽  
Author(s):  
C Biscos ◽  
M Mulholland ◽  
M-V Le Lann ◽  
CA Buckley ◽  
CJ Brouckaert
Keyword(s):  
Predictive Control ◽  
Water Distribution ◽  
Distribution Networks ◽  
Optimal Operation ◽  
Water Distribution Networks

Optimal Operation of Virtual Power Plant in Unbalanced Distribution Networks

2016 ◽  
Vol 44 (14) ◽  
pp. 1620-1630 ◽  
Author(s):  
Mahmoud M. Othman ◽  
Yasser G. Hegazy ◽  
Almoataz Y. Abdelaziz
Keyword(s):  
Power Plant ◽  
Distribution Networks ◽  
Optimal Operation ◽  
Virtual Power ◽  
Virtual Power Plant

Optimal operation of distribution networks

1996 ◽  
Vol 11 (1) ◽  
pp. 59-67 ◽  
Author(s):  
G.J. Peponis ◽  
M.P. Papadopulos ◽  
N.D. Hatziargyriou
Keyword(s):  
Distribution Networks ◽  
Optimal Operation

scholarly journals Convex Approximation Algorithm for AC/DC Distribution Network With Energy Router

2021 ◽  
Vol 9 ◽  
Author(s):  
Tao Zhang ◽  
Yunfei Mu ◽  
Xiaoyu Wang ◽  
Youjun Deng ◽  
Yi Song ◽  
...  
Keyword(s):  
Approximation Algorithm ◽  
Distribution Network ◽  
Distribution Networks ◽  
Optimal Operation ◽  
Convex Programming Problem ◽  
Convex Approximation ◽  
Approximation Approach ◽  
Flow Equations ◽  
Dc Distribution ◽  
Highly Nonlinear

The optimal operation model of AC/DC distribution network with energy router (ER) is essentially a nonconvex nonlinear programming (NLP) problem. In order to improve the feasibility of solving the model, a convex approximation algorithm is proposed in this work. The steady-state model of ER is developed with considering the loss characteristics and multiport coordinated control strategy. It is embedded in the optimization formulations of AC/DC network as basic operating equations. Then, using second-order cone relaxation technology, the power flow equations of AC and DC distribution networks are convexly relaxed. On this basis, the highly nonlinear operating model of ER is linearized by introducing a successive approximation approach. Therefore, the original NLP problem is transformed into the convex programming problem and the solution efficiency is improved. Meanwhile, an iterative solution algorithm is developed to ensure the accuracy of the convex approximation approach. Simulation results verify the feasibility and efficiency of the proposed algorithm.

Sign in / Sign up

Export Citation Format

Share Document