Instantaneous Voltage Sag Corrector Controller Design of Power Line System

2006 ◽  
Vol 20 (3) ◽  
pp. 6-11
Keyword(s):  
Controller Design ◽  
Power Line ◽  
Voltage Sag ◽  
Line System ◽  
Instantaneous Voltage

scholarly journals Collision with power lines and electrocutions in birds — an analysis based on Swedish ringing recoveries 1990–2017

Ornis Svecica ◽  
2019 ◽  
Vol 29 ◽  
pp. 37-52
Author(s):  
Thord Fransson ◽  
Lina Jansson ◽  
Tuomo Kolehmainen ◽  
Thomas Wenninger
Keyword(s):  
At Risk ◽  
Natural History ◽  
Power Line ◽  
Power Lines ◽  
Local Power ◽  
Line System ◽  
Underground Cables ◽  
Number Of Species ◽  
History Information ◽  
Over Time

Recoveries of birds ringed in Sweden from the period 1990–2017 were used to analyse the occurrence of collisions with power lines and electrocutions. Out of more than 10,000 recoveries of birds found dead with finding circumstances mentioned, 8.6% was associated with power line constructions. The number of species involved was 51 and high proportions were especially evident in some species of owls and raptors. The overall proportion of recoveries caused by collision / electrocution shows a significant decrease over time. A decrease over time in the proportions of electrocution and collision was also evident when analysing finding circumstances in four species where corpses were sent to the Swedish Museum of Natural History. Information about the power line system in Sweden during the period 2007–2016 shows that the length of local power lines has decreased with about 21% during a ten-year period and that underground cables have increased with 28% during the same period. The results show that collisions with power lines have decreased more than electrocutions and this may imply that there are still many places where birds are at risk of being electrocuted.

Detection of voltage sag sources based on instantaneous voltage and current vectors and orthogonal Clarke's transformation

2008 ◽  
Vol 2 (2) ◽  
pp. 219 ◽  
Author(s):  
B. Polajžer ◽  
G. Štumberger ◽  
S. Seme ◽  
D. Dolinar
Keyword(s):  
Voltage Sag ◽  
Instantaneous Voltage

A New Measurement Method of Conducted EMI on the Power-Line Communications Channel

2013 ◽  
Vol 397-400 ◽  
pp. 1988-1993
Author(s):  
Wei Long Fu ◽  
Ya Lin Guan ◽  
Yang Lu
Keyword(s):  
Electromagnetic Interference ◽  
Measurement Method ◽  
Low Voltage ◽  
Power Line ◽  
Line System ◽  
Power Line Communications ◽  
Noise Characteristics ◽  
Working Principle ◽  
The Time Domain ◽  
Conducted Emi

Various kinds of household appliances have been widely deployed in the low-voltage grid. They inject conducted noise into the power line system, which may cause a detrimental effect on the Power-line Communications (PLC) channel. This paper examines a new measurement method of conducted Electromagnetic Interference (EMI) on the PLC channel. The proposed method is to facilitate the noise characteristic research, which overcomes the potential difficulties when the measurement is performed according to CISPR 16-2-1. In particular, taking the hairdryer as an example, the conducted noises when the motor is deemed as the noise source are measured by employing the presented method. Moreover, this paper also analyzes the conducted noise of the hairdryer both in the time domain and in the frequency domain, and interprets the noise generating mechanisms with the working principle of the motor in detail. The central issue in all these studies is to research the conducted electromagnetic noise characteristics on the PLC channel.

scholarly journals Methodology of risk assessment for electricity distribution lines in Slovakia with regard to potential bird mortality due to collisions with power lines

2019 ◽  
Vol 13 (1) ◽  
pp. 61-73
Author(s):  
Ján Šmídt ◽  
Ervín Hapl ◽  
Marek Gális
Keyword(s):  
Bird Community ◽  
Cost Effective ◽  
Power Line ◽  
Power Lines ◽  
Mitigation Measures ◽  
Migration Routes ◽  
Bird Flight ◽  
Line System ◽  
Bird Mortality ◽  
Landscape Information

Abstract Power lines represent an important and increasing worldwide cause of avian mortality due to collisions involving flying birds. One positive and very important fact is that only some parts of potentially dangerous lines are responsible for the majority of killed birds. These sections need to be identified and treated with proper mitigation measures. In this article we present a specially-prepared methodology aimed at classifying power lines according to the risk they present. The identification of power lines with the highest risk of possible bird collision requires easily-accessed biological, technical and landscape information. In addition to analyses of these main inputs, our methodology also evaluates the influence of power line orientation relative to the important migration routes of birds, the effect of nearby tree growth higher than the evaluated power lines, and the complexity of landscape relief. Based on these three additional inputs, it is possible to produce a digitalized map showing with one-meter accuracy the location of power line sections with the high/middle/low mortality risk due to collision for any existing or newly-planned grid. Sections with highest risk should be considered as priority for the implementation of mitigation measures including e.g. installation of bird flight diverters. Our methodology was prepared for 22 kV and 110 kV distribution power lines in Slovakia. It is flexible enough to be applied equally to any geographic conditions and/or bird community, different voltage levels and construction designs of power lines. Our methodology can be applied by ornithologists, nature conservancy organization and power line system operators to implement environmental and cost-effective mitigation measures.

scholarly journals A Flexible Approach for Smart Management of Transmissions in Power Line Communications

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mario Collotta ◽  
Salvatore Tirrito
Keyword(s):  
Data Transmission ◽  
Power Line ◽  
Line System ◽  
Power Line Communications ◽  
Transmission Quality ◽  
On Chip ◽  
Electrical Wiring ◽  
Real Scenario ◽  
Line Network

Power line communications (PLCs) refer to a technology based on the existing electrical wiring to transmit data among the devices connected to the network. The PLC technology is an excellent solution widely studied and analysed by researchers, even in those areas characterized by strict requirements, such as industries. In this paper, a technique based on fuzzy logic, for the dynamic management of the amplitude of the signal emitted by the devices of a power line network, is proposed. The main aim is to manage the amplitude of the transmission signal in order to reduce the noise introduced into the network, and, as a consequence, the power consumption, increasing data transmission quality of network in terms of Quality of Service (QoS). This solution has been implemented into embedded systems based on the ADD1010, a power line System on Chip (SoC), and tested through a real scenario realized in laboratory.

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