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The objective of this paper is to demonstrate the benefits of using multiterminal DC links in distribution systems. A three level control strategy is considered to obtain an optimal power flow and to improve the voltages transient behavior. Analysis and simulations are carried out over a medium voltage benchmark distribution network from IEEE/CIGRE. Power losses reduction and improved voltage profiles...
Distributed wind generation is growing on power systems across the world. It presents many well established technical issues in the distribution network, such as voltage rise, network reinforcement requirements or varying power output. Nonfirm generation, i.e. one to which curtailment can apply due to network infrastructure technical constraints, potentially holds certain benefits for distributed...
Power system operation and control relies heavily on models for decision making. Topology is a critical part of producing these models and maintaining up-to-date topologies of electrical distribution networks is a resource consuming and challenging task. This paper describes a methodology and system architecture for inference of electrical topology using process and model data from IEC 61850 — compliant...
Manual operator's interventions in control centers are most common way of handling today's power networks. Replacing manual interventions with a sophisticated algorithm running in closed-loop allows the network to be more flexible, and prevent network operators from making mistakes. Such algorithm must fulfill very high expectations about reliability, security and performance. The approach described...
Plug-in electric vehicles (PEVs) have uncertain penetration in electric grids due to uncertainties in charging and discharging patterns. This uncertainty together with various driving habits makes it difficult to accurately assess the effects on local distribution network. Extra electrical loads due uncoordinated charging of electric vehicles have different impacts on the local distribution grid....
This paper presents a study for the network reconfiguration problem for loss reduction with distributed generation units (DGs) included in the network. Two heuristic algorithms inspired from natural phenomena are proposed to solve the problem, real ants'-behavior-inspired, Ant Colony Optimization (ACO) implemented in the Hyper Cube (HC) framework and musicians'-behavior-inspired, Harmony Search (HS)...
Eight representative low voltage distribution networks in the city of Zurich are modeled including detailed data on individual consumer loads. Subsequently, the impacts of large scale plug-in electric vehicle (PEV) deployment on the particular networks are simulated. The spatial and temporal PEV transportation behavior is determined using an agent based model which makes use of an energy consumption...
Dispersed generation (DG) creates a variety of impacts on distribution network operation and implies significant changes to planning practices. An area of interest consists in providing distribution system operators (DSOs) with the means to make best use of the existing network, without the need for reinforcement, nonetheless evidencing which prerequisites might be required to DG according to upcoming...
This paper presents a modified branch-exchange heuristic method for reconfiguration of large-scale radial distribution networks to minimize real power loss. Unlike the conventional fundamental loops, the loops of the distribution networks are redefined like in the circuit meshes. The proposed method is based upon the successive branch-exchange in the ranked loops and the ranking of loops has also...
The paper describes the definition and the validation of a methodology, based on an extension of the hosting capacity concept, aimed at assessing the effects of plug-in electric vehicles (PEVs) charging on low voltage distribution networks. An index (called time-dependent hosting capacity) is proposed, which enables to include in its formulation the charging duration, in order to point out the grid...
The capacity of distributed generation (DG) connected in distribution networks is increasing as part of the drive to connect renewable energy sources. Due to widespread application of power electronic inverter interfaces, DG can inject harmonic current through the point of common connection into the upstream network. Harmonic current emission may cause voltage distortion problems when harmonic resonance...
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