Active Distribution Networks


Active distribution network will be able to highly integrate and utilize a variety of distributed energy through real-time control system and two-way communication network to improve system reliability and operational efficiency.

Active distribution network concept is capable of real-time monitoring of whole grid and it may utilize the flexibility of distributed energy resources to enhance the hosting capacity of low voltage networks.

Optimal Load Restoration in Active Distribution Networks Complying with Starting Transients of Induction Motors

Optimal Load Restoration in Active Distribution Networks Complying with Starting Transients of Induction Motors
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Large horsepower induction motors play a critical role as industrial drives in production facilities. The operational safety of distribution networks during the starting transients of these motor loads is a critical concern for the operators. In this paper, an analytical and convex optimization model is derived representing the starting transients of the induction motor in a semi-static fashion. This model is used to find the optimal energization sequence of different loads (static and motor loads) following an outage in a distribution network. The

Microgrids and active distribution networks
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Power and energy engineers, academics, researchers and stakeholders everywhere are pondering the problems of depletion of fossil fuel resources, poor energy efficiency and environmental pollution. Hence there is a new trend of generating energy locally at

A review on voltage control methods for active distribution networks
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Power distribution systems are in the state of transition from passive to active networks due to the rising penetration level of distributed generators (DGs). One of the technical challenges of active networks is to maintain an acceptable voltage level. This problem has

Analysis of influence factors on rejected active power from active distribution networks
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Due to environmental and economical concerns, windbased generation injected into transmission networks (TNs) is increasing. However, a part of this generation would be curtailed due to many factors such as system constraints, variations of energy penetration

A planning approach for active distribution networks
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This paper assesses the various requirements to facilitate the transition towards active distribution networks (ADNs) based on the analysis of development stages home and abroad. A planning model for ADNs planning is proposed considering the planning goals

A hardware-in-the-loop test platform for the real-time state estimation of active distribution networks using phasor measurement units
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The paper describes the development and the performance assessment of a Hardware-in- the-Loop (HIL) test platform built as a proof-of-concept of a sub-second State Estimator (SE) of Active Distribution Networks (ADNs). The SE relies on the availability of data coming from

Multi-year optimal planning of active distribution networks
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The opportunities deriving from the innovative operation of the distribution systems have been underlined in the Literature and might be useful to accomplish economic, environmental and reliability targets by overcoming the existing barriers to innovation and

Real-time electromagnetic and transient stability simulations for active distribution networks
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This paper presents the solutions of a real-time parallel-processing based simulator, eMEGAsim, to perform electromagnetic transient and transient stability simulations for distribution power networks . The electromagnetic transient simulation can be distributed into

Role of storage systems and market based ancillary services in active distribution networks management
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SUMMARY The diffusion of Distributed Generation (DG) in MV distribution networks is continuously growing, being supported by the improving performances of small generation units, by the renewable incentives introduced to meet the environmental targets and by the

Fault location in active distribution networks by means of the continuous-wavelet analysis of fault-originated high frequency transients
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The first aim of the paper is the characterization of fault-originated transients in power distribution networks as a function of the fault location and of the measurement point. Both fault location and of the measurement point are indeed correlated to the position of the

An optimal procedure for sizing and siting of DGs and smart meters in active distribution networks considering loss reduction
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The presence of responsive loads in the promising active distribution networks (ADNs) would definitely affect the power system problems such as distributed generations (DGs) studies. Hence, an optimal procedure is proposed herein which takes into account the

Smart congestion management in active distribution networks
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Driven by international climate policy, the electrical distribution networks worldwide have been hosting an increasing share of renewable energy resource (RES) based distributed generation (DG) and new forms of load consumption such as electric vehicles (EVs), heat

Protection of future active distribution networks with distributed generation
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One of the key protection functionalities in the future active distribution networks will be reliable detection of islanding. Non-detection zone (NDZ) and unwanted distributed generation (DG)/embedded generation (EG) unit trips due to other network events (nuisance

Multi-Agent System based Active Distribution Networks
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This thesis gives a vision of the future power delivery system with its main requirements. An investigation of suitable concepts and technologies which enable the future smart grid, has been carried out. They should meet the requirements on sustainability, efficiency, flexibility

Simulation model of a protection scheme for active distribution networks
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The growing trend of installed power from Distributed Generators (DG) in distribution networks is giving rise to new issues in grid operations. In particular, the interaction between DG and grid protections can cause nuisance trips, unwanted island operations and, in

Influence of average power factor management on active distribution networks
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During the transmission and distribution process of electricity, technical power losses inevitably occur, depending on current flows along the lines which in turn are affected by the power factor resulting from loads and dispersed generation, as well as from both intentional

Impact of active distribution networks on voltage stability of electric power systems
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With the large-scale integration of distributed generators in the lower voltage levels and the installation of adequate communication infrastructure the controllability of distribution networks increases. Here, novel active distribution network control schemes are able to

Probabilistic voltage estimation for the active control of distribution networks
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ABSTRACT A procedure allowing a reliable State Estimation (SE) for active distribution networks , without requiring remote online measurements, is presented. It is based on load modelling techniques and Discrete Step Communications (DSCs) for Distributed Generation

New control and management architectures for active distribution networks
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Active networks will create new challenges which will dramatically change the electrical network operation and its interaction with the consumer, driven by factors like environmental sustainability, consumer empowerment, security and quality of supply, and finally the

Planning and operation of active radial distribution networks for improved voltage stability and loss reduction
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The impending deregulated environment facing the electric utilities in the twenty first century is both a challenge and an opportunity for a variety of technologies and operating scenarios. Changing regulatory and economic scenarios, energy savings and environmental impacts

Microgrids and Active Distribution Networks (Energy Engineering)
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Crossley The conventional power system around the world is facing the problems of gradual depletion of fossil fuel resources, poor energy efficiency and environmental pollution. This has lead to the recent trend of generating power at distribution voltage level from