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Integration of large-scale photovoltaic power plants is increasing significantly in many develop and developing countries. Although photovoltaic (PV) plants are renewable and environmental friendly, they can bring negative impact in the form of low frequency oscillation due to the uncertainty of power output and negligible inertia. Hence, battery energy storage systems (BESSs) are becoming an inevitable...
Renewable technology based Micro Grid (MG) are mostly implemented with power electronic devices. Those MGs have no or very small aggregated physical inertia, depending on the generation technology used. Reduction in system inertia may have negative influence on stability of the system where the MG is integrated. Conversely power injection from MG might reduce line congestion, stress on synchronous...
EV charging stations (EVCS) are expected to be deployed at business premises such as universities, hospitals, shopping malls and other office buildings in the future. Their impact on electric grids depends on their combined daily load profile and proportions of its constant current (CC) and constant voltage (CV) load. The daily load profile and the proportion of its CC and CV are different for different...
Energy Storage (ES) has been seen as a crucial element in active distribution networks. It facilitates a high penetration level of intermittent renewable energy in power systems thus provide several technical and economic benefits to the utility and consumer. However, given a high capital cost associated with ES, it is crucial to develop an effective planning strategy to avail the maximum benefit...
Proliferation of electric vehicles (EVs) will engender additional loads on electric grids. As EVs will be parked in large numbers for long time at business locations such as universities, shopping malls, offices etc., electric grids of these business locations can be affected. Thus, this paper analyzes impacts as such on business premises, whose diurnal distributions of number of arrival and departure...
Having a network of fast charging stations seems necessary in order to make EVs more attractive and to achieve larger uptake of them. Currently, 50 kW quick chargers that can charge a typical EV in about an hour are commercially available. However, a 240 kW fast charging level which can charge a typical EV in 10 minutes has been introduced in standards. It is expected that this high power fast chargers...
Depending on charging locations and business interest, EV charging facilities can be classified into Commercial Charging (CC), Business Charging (BC), and Home Charging (HC). Diurnal load distribution in these EV charging facilities can be dissimilar on the account of different customers' behavior. Therefore, these charging facilities will put forth different degrees of impacts on the grid. A portion...
The growing concerns of climate change and depletion of fossil fuels are driving rapid development of wind generations. However, the integration of large scale wind generation may compromise the stability of the power system. Besides, the same source of renewable generation such as wind may deploy various technologies such as Doubly Fed Induction Generator (DFIG), Squirrel Cage Induction Generator...
Electric Vehicles (EVs) have the potential to provide numerous ancillary services to the grid owing to the fact that they can act as either loads or sources when connected to the grid. However, customers are still disinclined to embrace this technology because of long battery charging time, limited range, and high battery replacement costs. Widespread rollout of fast Electric Vehicle Charging Stations...
Energy Storage (ES) has become an important element in Active Distribution Networks (ADNs) due to progressive integration of renewable energy such as photovoltaic (PV). ES enables high penetration of intermittent PV while bringing several additional benefits to the network. Such benefits include loss reduction, voltage profile improvement and reverse power flow avoidance. This paper presents an analysis...
Widespread acceptance of Plug-in Electric Vehicles depends on the presence of charging infrastructures with filling times close to those of petrol stations. On the other hand, the roll out of fast charging stations which have significant power demand would cause several issues in the power grid such as overload, voltage drop and power loss. Therefore, to avoid costly upgrades in the existing power...
This paper presented an approach to place single and multiple Energy Storage (ES) units in a distribution network with photovoltaic (PV) units considering energy losses. The approach is based on ALSFmax, which is defined as a difference between the minimum and maximum Loss Sensitivity Factor (LSF) values. The GridLAB-D simulation software is used to model test systems under the study and to validate...
The interest for installation of solar Photovoltaic (PV) systems in the distribution network has been increasing due to their declining cost and high electricity price from the utilities. On the downside, the PV power generation is sensitive to the variation in solar irradiation, which can cause potential challenges in the low voltage network in terms of voltage quality and management. In this research,...
Rooftop Solar Photovoltaic (PV) systems installations have been increasing in the Low voltage distribution networks due to decreased cost and government incentives (e.g. feed-in-tariff). The high penetration of these PV systems can inject harmonics into the network causing problems to sensitive loads and controllers of loads. Due to the solar irradiation dependency, the power generation is variable...
The ever-increasing trend of extracting electrical power from renewable resources is encouraging addition of more and more wind generation to the grid. However, the integration of added wind generation is compromising the stability of the system as wind generation technologies differ from that of conventional generation. Hence, there is an urgent need to investigate influence of various wind generation...
The dynamic analysis of modern power systems often requires computational assistance from software. Analysis software can be difficult to manipulate for exploring the characteristics of a power system, especially under a large number of operating conditions. In addition, many stability results are output in large tables of data, which leaves room for better visualization. This paper considers how...
The interest on electric vehicles growing as a sustainable alternative to fossil fuel driven vehicles. Even though there are a number of grid impact studies, only a scant attention has been paid to study the impact of EV charging on system stability. Electrification of transportation brings significant load integration to the grid. This could profoundly influence stability of the grid. Hence, it is...
Community Energy Storage (CES) has been known as a new generation of energy storage that is a crucial element in smart grid. Its location at the edge of the grid and close to customers offers great benefits compare to energy storage located at substation in terms of smoothening the impacts of intermittent Renewable Energy (RE) resources and diversity of Electric Vehicle (EV) operational characteristics...
The paper presents a method of designing a low order robust wide-area damping controller (WADC) for large-scale photovoltaic (PV) power plants. The controller design procedure is focused on designing a second-order wide-area damping controller by convex optimization method. A Hankel singular value (HSV) based hybrid signal selection method is also proposed for optimal selection of the control signal...
With rapid increase in installation of rooftop Solar Photovoltaic (PV) systems in low voltage (LV) distribution networks, power quality becomes a key area of interest. Among various poor power quality problems in LV networks, harmonic distortions, which could come from several sources, have become a major concern. The solar PV systems can generate harmonics itself. Besides this, the increasing use...
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