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Social networks (SNs) have been gradually applied by utility companies as an addition to smart grid and are proved to be helpful in smoothing load curves and reducing energy usage. However, SNs also bring in new threats to smart grid: misinformation in SNs may cause smart grid users to alter their demand, resulting in transmission line overloading and in turn leading to catastrophic impact to the...
Accurate distribution secondary circuit models are needed to effectively monitor and coordinate the distributed energy resources located in the secondary circuits and to enhance overall distribution system operations and planning. Accurate secondary models are also needed to fully leverage the measurement data received from smart meters and distributed energy resources at the customer premises. This...
Efficient management and coordination of distributed energy resources with advanced automation schemes requires accurate distribution system modeling and monitoring. Big data from smart meters and photovoltaic (PV) micro-inverters can be leveraged to calibrate existing utility models. This paper presents computationally efficient distribution system parameter estimation algorithms to improve the accuracy...
The paper proposes to model a thermal network by using a simple equivalent electrical circuit, in order to easily predict the thermal power generation once fixed the desired temperature. The validation has been performed on the Savona Campus Smart Polygeneration Microgrid (SPM): identifying the value of the parameters involved in the model by minimizing the difference between the temperature profile...
The primary objective of this paper is to highlight the need for and benefits of studying the steady state and dynamic response of power systems using three phase integrated transmission and distribution (T&D) system models (hereafter referred to as hybrid models). Modeling and simulation requirements for building and analyzing hybrid models are also discussed. Finally, results from steady state...
This paper presents an approach for generating simplified secondary circuit models with limited SCADA and PV micro-inverter measurement data. The proposed method is computationally efficient and can be utilized with typically available measurement data. The method is applied to models of three real U.S. utility feeders with PV micro-inverter measurements. The proposed simplified secondary circuit...
The increasing share of renewable energy sources and distributed energy generation (DER) in the energy mix brings a number of challenges to the power system, particularly to the distribution network (DN). New control methods and algorithms are being studied to address these challenges, but the effects of such algorithms on actual DNs are often difficult to validate. Co-simulation, considering the...
The aim of this paper is to evaluate how a smart grid commissioning platform can support power electronics development. Discussion about system modeling, mainly including power converters, is performed. To demonstrate effectiveness of using a commissioning platform a real power system was evaluated. As a result, it was possible to evaluate the effects of photovoltaic generation connected to the grid,...
The main purpose of this paper is to introduce the development of a simulation model in order to evaluate the impact of massive recharge of Electrical Vehicles (EVs) on distribution networks in Bogotá, Colombia, taking into account specific EVs user behavior scenarios. EVs recharge is characterized and represented by software models based on EVs test measures and existing distribution networks topologies...
The recent increase of distributed generation in distribution networks has determined the necessity of developing new control strategies for the mitigation of power quality issues. One of these functions, considered as one of the most promising solutions for the management of voltage congestions, is represented by the droop control of DG units. The traditional Power Flow formulation often does not...
This paper presents the use of a computational system, MATLAB/Simulink SimPowerSystem, as a tool for analysis of power quality (PQ) including distributed generation (DG) connected to smart girds. An electrical circuit model for DG, recloser, photovoltaic system-PV and loads located downstream and upstream from recloser is proposed in this study. The paper shows that this system allows to understand...
The paper proposes a model for the thermal network of the Savona Campus Smart Polygeneration Microgrid (SPM) in terms of an equivalent electric circuit. Such model allows to represent in a simple but accurate way the behavior of the SPM thermal network in order to insert it into the Energy Management System (EMS) that is presently running in the SPM control room. The parameters of the thermal circuit...
A centralized approach to solve optimal operation of a practical sized distribution grid with a large number of electric vehicles (EVs) is a computationally challenging task. This work proposes a bi-level hierarchical optimization framework to solve the problem. In the hierarchy, optimal operation of the distribution grid is considered in one level, while the optimal operation of EVs is carried out...
nowadays smart meter is widely used in smart grid system which requires demand response to solve the unbalance problem between power supply and power demand. This article proposes a simple and economical demand response system with smart meter that can implement demand response locally.
A stochastic modelling of electrochemical battery for their lifetime assessment is proposed and numerically evaluated in smart grids context. The method uses a proper battery model, characterized by stochastic current demand, for deducing the battery lifetime. In particular, a stochastic process for describing the current load is adopted, which is namely described by a proper Poisson stochastic process,...
The transmission tariff function will facilitate competitive electricity market by impartially providing energy transportation services to all energy buyers and sellers, while fairly recovering the cost of providing those services. Transmission tariff is more fairly and transparently allocated in order to get full recovery of ARR of transmission facilities by using combination of MW-Mile and Postage...
This paper presents a smart distribution grid testbed to test or compare designs of integrated information management systems (I2MSs). An I2MS extracts and synthesizes information from a wide range of data sources to detect abnormal system behaviors, identify possible causes, assess the system status, and provide grid operators with response suggestions. The objective of the testbed is to provide...
An open-source distribution system simulator has been developed for distributed resource planning, harmonic studies, neutral-earth voltage studies, volt-var control studies, and other special applications. The software includes several means of interfacing user code, including compiled dynamic link library, COM automation, and text scripting. Co-simulation interfaces are under development for interfacing...
Distributed resource adoption coupled with smart grid implementations is expected to significantly alter the nature of the distribution system. However, traditional distribution models and analysis techniques are not capable of capturing the relevant temporal and spatial characteristics associated these devices. As a result, new models and analyses are needed to permit distribution planners to access...
This paper addresses the coordination of the Smart Distribution Grid applications with advanced applications in other power system domains, especially in the transmission operation and customer domains. The paper discusses the holistic approach to the role of Smart Distribution Applications in the support of the wide area situational awareness, dynamic optimization, and self-healing operations of...
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