This paper deals with distribution network (DN) reconfiguration for loss minimization. To solve this combinatorial problem, a genetic algorithm (GA) is considered. In order to enhance its ability explore the solution space, efficient operators are developed. After survey of existing DN topology description methods, theoretical approach based on graph and matroid theories (graphic in particular) These concepts used propose new intelligent effective GA mutation crossover well dedicated...

A microgrid (MG) is a cyber-physical system with coupled power and communication networks. The centralized secondary control of MGs periodical communications restricts efficiency resilience. This article proposes distributed event-triggered scheme in islanded its implementation. proposed operates the reduced frequency depending on MG states change "events" (e.g., load variations failures). Besides, objectives, including frequency/voltage regulation accurate real/reactive sharing, are...

In deregulated power systems, the distribution network operator (DNO) is not responsible for investment in distributed generation (DG) units, and they are just concerned about best architecture ensuring a good service quality to their customers. The operating decisions related DG units then taken by entities other than DNO which exposed uncertainty. should be able evaluate technical effects of these uncertain decisions. This paper proposes fuzzy evaluation tool analyzing effect operation on...

The integration of microgrids (MGs) in distribution networks forms the networked (NMGs). peer-to-peer (P2P) control architecture is able to fully exploit flexibility and resilience NMGs. This paper proposes a multi-layer multi-agent achieve P2P framework distributed contains three layers operated agent each MG. For primary control, droop adopted by MG-agent for localized power sharing. secondary consensus algorithm proposed frequency/voltage restoration arbitrary sharing among MGs. tertiary...

Internet-of-Things concepts are evolving the power systems to Energy Internet paradigm. Microgrids (MGs), as basic element in an Internet, expected be controlled a cooperative and flexible manner. This article proposes novel distributed control scheme for multiagent (MASs) governed MGs future Internet. The objectives frequency/voltage restoration proportional sharing. proposed considers both intra- inter-MASs interactions, which offers group plug-and-play capability of generators. stability...

This study proposes a probabilistic dynamic model for multi-objective distributed generation (DG) planning, which also considers network reinforcement at presence of uncertainties associated with the load values, generated power wind turbines and electricity market price. Monte Carlo simulation is used to deal mentioned uncertainties. The planning process considered as two-objective problem. first objective minimisation total cost including investment operating DG units, paid purchase energy...

In deregulated power systems, distribution network operators (DNO) are responsible for maintaining the proper operation and efficiency of networks. This is achieved traditionally through specific investments in components. The event distributed generation (DG) has introduced new challenges to these role DG units must be correctly assessed optimise overall operating investment cost whole system. However, owners (DGOs) have different objective functions which might contrary objectives DNO....

This paper presents a Power Oscillation Damping (POD) controller, inspired by traditional System Stabilizer (PSS), as an additional control loop for Inverter Based Resources (IBRs) controlled in grid following (GFL) mode. The major idea is the contribution of several IBRs to damp electromechanical oscillations power system, order increase system hosting capacity. During frequency transients, POD modifies reactive reference GFL control. has measurement input signal, and its tuning based on...

Distribution systems must be ready to face upcoming technical and economic constraints: increase of Distributed Generation (DG) connections, changes in network losses voltage profiles, among others. In this context, new centralized automation functions distribution system control centers are needed order ensure the both connected DGs. Consequently, state estimators need developed for future assess network's real time, i.e., 10 minutes typical time frame, based on real, pseudo-, virtual...

In this article, a distributed hierarchical control framework with coordinated secondary and tertiary levels is proposed for islanded microgrids (MGs). The structure functionality of each agent are formulated to process simultaneously the TC in peer-to-peer communication network. First, restoring system frequency/voltage while providing power sharing considering droop coefficients upper level dispatch orders. Then minimizes network loss MG by using alternating direction method multipliers...

Utility power systems are faced to an increasing number of small size producers requiring interconnection particularly the low voltage (LV) network. Since most distribution not designed "receive" large scale injections, these generation units may impact networks specifically in terms quality energy delivered, reliability and safety whole system from LV medium (MV) levels. In this paper, a methodology, based on parametric study, is proposed investigate distributed (DG) impacts when...

Presently, there is a poor knowledge about the coupled systems and their interdependency. Failures caused by cascade effects are increasing operators' do not know how to control adequately negative consequences on systems. At same time, critical infrastructures due relevance potential targets of outlaw groups, ill- disposed people, terrorist groups. The modeling may lead an evaluation power system security could help asses impact cascading effect between ICT Power Grid. By consequence, it...

Distribution networks will experience a deep mutation concerning their planning and operation rules due to the expected increase of distributed generation (DG) interconnection grid. Indeed, opening electricity market or growing global concern for environmental issues lead massive development DGs. Yet, too large amount DGs could raise technical problems on distribution which have not been planned operate with bi-directional power flow. The existing solutions solve marginal DG connections be...

Distributed control and optimization strategies are a promising alternative approach to centralized within microgrids. In this paper, multi-agent system is developed deal with the distributed secondary of islanded Two main challenges identified in coordination microgrid: (i) interoperability among equipment from different vendors; (ii) online re-configuration network case alteration topology. To cope these challenges, agents designed communicate physical devices via industrial standard IEC...

Motivated by the concerns about climate change, energy-harvesting technologies have recently gained particular interest to support growing power demand of cellular networks. The environment-friendly sources coupled with batteries enable significantly reduce carbon emissions as well electricity bill mobile network operators (MNOs). However, incautious battery usages can heavily damage storage capabilities and require large expenses for replacement. To investigate this tradeoff, we propose an...

The medium-voltage grid is often planned in loops, but operated a radial structure to allow robust protection scheme. This allows the reconfiguration of grid. paper focuses on after fault re-establish service, also referred as self-healing. It includes localization faults and finds new configurations based actual status solving problem nonpolynomial difficult. Finding an acceptable solution resupply nonfaulted parts under tight time limits innovative contribution this approach that local...

The paper addresses the problem of short-term renewable energy forecasting. stochastic nature sources affects power system planning procedures, subsequently reducing reliability and security supply for final customers. authors propose a machine learning approach effective day-ahead forecasting using retrospective metering data open source weather information provided by meteorological services. feature identification appropriate error metrics. For purpose testing user interface was created...

This paper deals with the hierarchical control architecture of meshed multi-terminal dc networks. The key difference previous works is that customarily adopted centralized secondary replaced by a fully-distributed, agent-based approach, in which nodes network cooperate and self-coordinate order to bring an optimal operating state. covers theoretical aspects shows how, setting problem as general consensus making use modern optimization techniques such alternating direction multipliers, power...

This paper proposes the description of an original smart-grids test bed aimed at teaching novel feeder automation functions to students from both university and industry origins. With this bed, a lab class students, first, develop using scientific software and, then, experiment by practically testing them on emulated distribution grid platform, called PREDIS. platform includes real medium-voltage reduced-scale loads, generators, supervisory control data acquisition system. The presented is...

This paper provides a solution to estimate synchrophasors with high accuracy at off-nominal frequencies using nominal frequency clock.The sampling rate is fixed, while the amplitude of sampled values altered generate sequence samples whose synchronized power system frequency.The re-computation done by cubic spline interpolation.The algorithm requires knowledge fundamental which estimated based on phase angle difference between two phasors.The performance has been tested simulation, through...