Multilevel inverter interface of distributed generation sources for medium voltage distribution networks

2011 ◽  
Author(s):  
Ayman B. Eltantawy ◽  
E. F. El-Saadany ◽  
M. M. A. Salama
Keyword(s):  
Distributed Generation ◽  
Distribution Networks ◽  
Multilevel Inverter ◽  
Voltage Distribution ◽  
Medium Voltage

Location and Size of Distributed Generation Using Ant Colony Optimization

2014 ◽  
Vol 492 ◽  
pp. 460-466 ◽  
Author(s):  
Jorge Mendoza ◽  
Miguel López ◽  
Allison Delgado
Keyword(s):  
Ant Colony Optimization ◽  
Distributed Generation ◽  
Electricity Generation ◽  
Recent Trend ◽  
Optimization Technique ◽  
Distribution Networks ◽  
Ant Colony ◽  
Energy Sources ◽  
Voltage Distribution ◽  
Medium Voltage

Distributed generation (DG) is a recent trend of electricity generation, which aims to use various energy sources to inject electric power in a distributed manner at points close to the load. This paper develops an optimization model to choose the sizes and positions of DG in medium voltage distribution networks in order to minimize the power system losses, given a set of constraints. Ant Colony Optimization (ACO) was used as optimization technique, with excellent results.

scholarly journals Voltage Stability Analysis in Medium-Voltage Distribution Networks Using a Second-Order Cone Approximation

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5717
Author(s):  
Oscar Danilo Montoya ◽  
Walter Gil-González ◽  
Andrés Arias-Londoño ◽  
Arul Rajagopalan ◽  
Jesus C. Hernández
Keyword(s):  
Distributed Generation ◽  
Optimal Power Flow ◽  
Voltage Stability ◽  
Distribution Network ◽  
Distribution Networks ◽  
Test System ◽  
Second Order ◽  
Voltage Distribution ◽  
Medium Voltage ◽  
Second Order Cone

This paper addresses the voltage stability margin calculation in medium-voltage distribution networks in the context of exact mathematical modeling. This margin calculation is performed with a second-order cone (SOCP) reformulation of the classical nonlinear non-convex optimal power flow problems. The main idea around the SOCP approximation is to guarantee the global optimal solution via convex optimization, considering as the objective function the λ-coefficient associated with the maximum possible increment of the load consumption at all the nodes. Different simulation cases are considered in one test feeder, described as follows: (i) the distribution network without penetration of distributed generation; (ii) the distribution network with penetration of distributed generation; and (iii) the distribution grid with capacitive compensation. Numerical results in the test system demonstrated the effectiveness of the proposed SOCP approximation to determine the λ-coefficient. In addition, the proposed approximation is compared with nonlinear tools available in the literature. All the simulations are carried out in the MATLAB software with the CVX package and the Gurobi solver.

scholarly journals Decentralized Voltage Regulation in radial Medium Voltage Networks with high presence of Distributed Generation

2018 ◽  
Vol 3 (1) ◽  
pp. 26-38 ◽  
Author(s):  
Konstantinos Kotsalos
Keyword(s):  
Distributed Generation ◽  
Decentralized Control ◽  
Control Strategy ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Control Architecture ◽  
Voltage Distribution ◽  
Alternative Control ◽  
Continuous Growth ◽  
Medium Voltage

The continuous growth of distributed generation along the medium voltage distribution networks (MVDN) induces multifaceted technical challenges that have to be addressed by alternative control architecture schemes beyond the centralized strategies and the fit and forget doctrine. The active participation of DG essentially drives the network to pave towards the Smart Grid concept. This paper entails a decentralized control strategy which is based on a sensitivity analysis to stipulate the proper dispatch set-points for the DGs; hence, all nodal voltages are in permissible bounds. An overview of sensitivity approaches is presented and discussed for their adequacy to be used in MVDN. The proposed method is simulated on a 13- Node Test Feeder IEEE benchmark, while its consistency is compared with a centralized scheme.

scholarly journals Optimal Allocation of Combined Renewable Distributed Generation and Capacitor Units for Interconnection Cost Reduction

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Saad Ouali ◽  
Abdeljebbar Cherkaoui
Keyword(s):  
Distributed Generation ◽  
Network Topology ◽  
Distribution System ◽  
Optimal Allocation ◽  
Reactive Power ◽  
Distribution Networks ◽  
Cost Evaluation ◽  
Renewable Generation ◽  
Voltage Distribution ◽  
Medium Voltage

In this paper, a new methodology for the optimal investment in distributed generation is presented, based on an optimal allocation of combined DG and capacitor units to alleviate network voltage constraints and reduce the interconnection cost of renewable generation integration in public medium voltage distribution networks. An analytical optimization method is developed, with the inclusion of practical considerations that are typically neglected in developed works: network topology reconfiguration and the geographical data of the generation land-use and network infrastructure. Powerful results concluded from a sensitivity analysis study of the most impacted parts of the network by the variation of active and reactive power injection under network topology reconfiguration are used as a basis for capacitor units placement. A case study, with two meshed IEEE 15-bus feeders and a new DG to connect, geographical dispersed, are used to simulate the performance of the proposed approach. A cost evaluation of the obtained results proves the effectiveness of the proposed approach to reduce the required charges for connecting new renewable generation units in medium voltage distribution system.

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