The impact of IP sets for establishment of baseline data in power distribution of electric utilities under R-APDRP

2011 ◽  
Author(s):  
P. Chandhra Sekhar ◽  
C. P. Jairam ◽  
T. Raghunatha ◽  
R. Sudhir Kumar ◽  
K. Devendra Rao ◽  
...  
Keyword(s):  
Power Distribution ◽  
Electric Utilities ◽  
Baseline Data ◽  
The Impact

scholarly journals Investigation of the Impact of Large-Scale Integration of Electric Vehicles for a Swedish Distribution Network

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4717 ◽  
Author(s):  
Sylvester Johansson ◽  
Jonas Persson ◽  
Stavros Lazarou ◽  
Andreas Theocharis
Keyword(s):  
Electric Vehicles ◽  
Power Distribution ◽  
Large Scale ◽  
Electrical Power ◽  
Distribution Network ◽  
Transport Sector ◽  
Smart Charging ◽  
Large Scale Integration ◽  
Scale Integration ◽  
The Impact

Social considerations for a sustainable future lead to market demands for electromobility. Hence, electrical power distribution operators are concerned about the real ongoing problem of the electrification of the transport sector. In this regard, the paper aims to investigate the large-scale integration of electric vehicles in a Swedish distribution network. To this end, the integration pattern is taken into consideration as appears in the literature for other countries and applies to the Swedish culture. Moreover, different charging power levels including smart charging techniques are examined for several percentages of electric vehicles penetration. Industrial simulation tools proven for their accuracy are used for the study. The results indicate that the grid can manage about 50% electric vehicles penetration at its current capacity. This percentage decreases when higher charging power levels apply, while the transformers appear overloaded in many cases. The investigation of alternatives to increase the grid’s capabilities reveal that smart techniques are comparable to the conventional re-dimension of the grid. At present, the increased integration of electric vehicles is manageable by implementing a combination of smart gird and upgrade investments in comparison to technically expensive alternatives based on grid digitalization and algorithms that need to be further confirmed for their reliability for power sharing and energy management.

scholarly journals Analysis on the Effect of Capacitor Banks Operation towards Total Harmonic Distortions (THD) in Distribution Network Test System

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Dalila M.S. ◽  
Zaris I.M.Y. ◽  
Nasarudin A. ◽  
Faridah H.
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Test System ◽  
Free Access ◽  
Initial Value ◽  
Power Distribution System ◽  
Source Codes ◽  
The Impact

This paper purposely to examine and analyse the impact of the distribution capacitors banks operation to the transition of total harmonic distortion (THD) level in distribution network system. The main advantage of this work is the simplicity algorithm of the method and the system being analysed using free access open software which is known as electric power distribution system simulator (OpenDSS). In this paper, the harmonic current spectrum which is collected from the commercial site was injected to a node point on IEEE13 bus in order to provide the initial measurement of THD for the network. The proper sizing of the capacitors banks has been set and being deactivated and activated throughout the network to see the transistion in the THD level in the system. The results were achieved by simulation of the data on the configured IEEE13 bus. The simulation work was done by using the combination of C++ source codes, OpenDSS and Microsoft Excel software. From the output results, the THD current has increased up to two times from the initial value in certain phases and for the THD voltage, the THD has increased up to three times from its initial value in all phases.

The Impact of US and China on ROK–DPRK Relations, 1993–2019

Asian Survey ◽  
2021 ◽  
pp. 1-28
Author(s):  
Alec Chung ◽  
Ki Eun Ryu
Keyword(s):  
Statistical Analysis ◽  
Power Distribution ◽  
Korean Peninsula ◽  
Great Powers ◽  
Event Data ◽  
The Us ◽  
The Impact ◽  
The Relationship

The relationship between the ROK and DPRK is bound to be affected by the two great powers—the US and China. Especially in recent decades, the power gap between the two great powers has continued to narrow. Given this, how is the geopolitical situation surrounding the Korean Peninsula shaping inter-Korean relations? This study uses event data and statistical analysis to explore the geopolitical factors that shaped inter-Korean relations from 1993 to 2019. We find that DPRK–ROK relations deteriorated as the power gap between the US and China narrowed. Also, inter-Korean relations were positive when DPRK–US relations were positive. In short, we conclude that during the shift in the US–China power distribution, maintaining positive DPRK–US relations while also managing inter-Korean relations peacefully is necessary for peace on the Korean Peninsula.

AN OVERVIEW OF THE IMPACT OF STRAY LIGHT FROM COMMERCIAL GREENHOUSES

2021 ◽  
Author(s):  
K. Bertin ◽  
G. Zissis ◽  
G. Salas ◽  
P.M. Raynham ◽  
A. Moutsi ◽  
...  
Keyword(s):  
Power Distribution ◽  
Spectral Power ◽  
Stray Light ◽  
Significant Problem ◽  
Light Sources ◽  
Spectral Power Distribution ◽  
Outdoor Work ◽  
Local Residents ◽  
The Impact ◽  
Current Standards

Stray light from commercial greenhouses is becoming a significant problem causing disruption to wildlife activity and annoyance for local residents. To quantify the amount of stray light from a typical large greenhouse the authors have modelled several lighting installations based on a range of generic horticultural light sources. The impact of the stray light is dependent on the spectral power distribution of the sources employed, the intensity and distribution. Current standards for obtrusive light from outdoor work places do not seem to be suitable when applied to greenhouses.

Towards Protecting Critical Infrastructures

2015 ◽  
pp. 121-165 ◽  
Author(s):  
Filipe Caldeira ◽  
Tiago Cruz ◽  
Paulo Simões ◽  
Edmundo Monteiro
Keyword(s):  
Power Distribution ◽  
Prediction Models ◽  
Critical Infrastructures ◽  
Industrial Control ◽  
Industrial Control Systems ◽  
Cascading Effects ◽  
Degree Of Confidence ◽  
Ict Security ◽  
Real Time Information ◽  
The Impact

Critical Infrastructures (CIs) such as power distribution are referred to as “Critical” as, in case of failure, the impact on society and economy can be enormous. CIs are exposed to a growing number of threats. ICT security plays a major role in CI protection and risk prevention for single and interconnected CIs were cascading effects might occur. This chapter addresses CI Protection discussing MICIE Project main results, along with the mechanisms that manage the degree of confidence assigned to risk alerts allowing improving the resilience of CIs when faced with inaccurate/inconsistent alerts. The CockpitCI project is also presented, aiming to improve the resilience and dependability of CIs through automatic detection of cyber-threats and the sharing of real-time information about attacks among CIs. CockpitCI addresses one MICIE's shortcoming by adding SCADA-oriented security detection capabilities, providing input for risk prediction models and assessment of the operational status of the Industrial Control Systems.

scholarly journals Controllability Evaluation of EV Charging Infrastructure Transformed from Gas Stations in Distribution Networks with Renewables

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1577
Author(s):  
Shuang Gao ◽  
Jianzhong Wu ◽  
Bin Xu
Keyword(s):  
Power Distribution ◽  
Queuing Theory ◽  
Distribution Networks ◽  
Temporal And Spatial Distribution ◽  
Charging Infrastructure ◽  
Optimal Dispatch ◽  
Gas Stations ◽  
Charging Stations ◽  
The Impact ◽  
Ev Charging

A considerable market share of electric vehicles (EVs) is expected in the near future, which leads to a transformation from gas stations to EV charging infrastructure for automobiles. EV charging stations will be integrated with the power grid to replace the fuel consumption at the gas stations for the same mobile needs. In order to evaluate the impact on distribution networks and the controllability of the charging load, the temporal and spatial distribution of the charging power is calculated by establishing mapping the relation between gas stations and charging facilities. Firstly, the arrival and parking period is quantified by applying queuing theory and defining membership function between EVs to parking lots. Secondly, the operational model of charging stations connected to the power distribution network is formulated, and the control variables and their boundaries are identified. Thirdly, an optimal control algorithm is proposed, which combines the configuration of charging stations and charging power regulation during the parking period of each individual EV. A two-stage hybrid optimization algorithm is developed to solve the reliability constrained optimal dispatch problem for EVs, with an EV aggregator installed at each charging station. Simulation results validate the proposed method in evaluating the controllability of EV charging infrastructure and the synergy effects between EV and renewable integration.

scholarly journals Characterization of a Y-Coupler and Its Impact on the Performance of Plastic Optical Fiber Links

Fibers ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 96 ◽  
Author(s):  
Alicia López ◽  
M. Losada ◽  
Javier Mateo ◽  
N. Antoniades ◽  
Xin Jiang ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Power Distribution ◽  
Glass Fibers ◽  
Single Mode ◽  
Transmission Properties ◽  
Modal Power ◽  
Custom Made ◽  
Plastic Optical Fibers ◽  
The Impact

Couplers and splitters are common devices in single-mode and multi-mode glass fibers applications, where they perform a variety of functions. However, when switching to plastic optical fibers (POFs), there is a shortage of commercial devices, which are usually custom-made. The problem with these devices is that modal power distribution in POFs is easily modified by spatial disturbances that produce a localized strong power transfer between modes, thus changing their transmission properties. In this work, a commercial Y-coupler designed for POFs is experimentally characterized. Measurements of its spectral, spatial and temporal characteristics have been performed, including insertion loss as a function of wavelength, angular power distribution, and frequency response. The obtained results show that this device has an equalizing effect over the power spatial distribution that reduces the fiber bandwidth, demonstrating the importance of considering the impact of this type of devices on the transmission properties of any POF system.

scholarly journals Considerations for the Design of UWB Antennas for Mobile and Consumer Equipment

2005 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Dirk Manteuffel
Keyword(s):  
Radiation Pattern ◽  
Power Distribution ◽  
Ultra Wideband ◽  
Fdtd Simulation ◽  
Single Frequency ◽  
Frequency Dependency ◽  
Propagation Modeling ◽  
Antenna Performance ◽  
Received Power ◽  
The Impact

This paper presents some considerations on the design, characterization and optimization of UWB (Ultra WideBand) antennas for consumer communication equipment. As a first step a method to extract the spatio-temporal UWB antenna characterization from a FDTD simulation is given. Thereafter, the shape of a planar monopole is optimized to provide broadband matching. This is followed by the integration of latter antenna into a model of a DVD player and the impact of this integration on the antenna performance is evaluated. Finally, the transfer function of the complete system is extracted and used for indoor propagation modeling in an exemplary living home environment. The results show that the antenna integration into the DVD-chassis results into a directive radiation pattern that shows a significant frequency dependency. When this antenna is used for the propagation modeling, a single frequency ray-tracing simulation shows significant variation in the radiated power distribution in the room as a result of the directive pattern. When the received power is averaged over a larger bandwidth, the coverage becomes more smooth mainly due to the frequency dependency of the radiation pattern and frequency dependent propagation effects. Indeed, comparing the results of the integrated antenna to the case of the ideal isotropic radiator, no major disadvantages can be discerned anymore.

scholarly journals Impact of size and distribution of installed PV power in E-W direction on the level in which selected consumers’ energy needs were met

2018 ◽  
Vol 10 ◽  
pp. 02023 ◽  
Author(s):  
Krzysztof Necka ◽  
Hubert Latala ◽  
Sławomir Kurpaska ◽  
Jarosław Knaga ◽  
Anna Karbowniczakʼ
Keyword(s):  
Power Plant ◽  
Power Distribution ◽  
Energy Demand ◽  
Energy Needs ◽  
East And West ◽  
Installed Capacity ◽  
The Impact

The aim of the study was to analyse the energy needs of selected consumers and to select the PV installed capacity in the east and west panels orientation (E-W). The analysis was carried out for two variants. The first concerned the impact of the installation power of a PV source on the contracted power in its symmetric east and west position. The second variant was the result of previous observations and studies of the authors of this paper. Thus, in this variant, the unbalanced power of PV E-W in relation to the S azimuth has been analyzed, taking into account the characteristics of the recipients' needs and the variation of the PV power installed. The analyses show that an increase in meeting the energy demand for two of the tested plants at symmetrical power distribution to the east and west occurred only when the installed power was increased to the level of approx. 1.4-1.6 of the contracted power. However, the power distribution in the E-W direction has a very strong effect on the energy amount that is generated in the power plant and cannot be used due to the lack of demand in the plant.

Sign in / Sign up

Export Citation Format

Share Document