Optimising power transmission and distribution networks using optical fibre distributed temperature sensing systems

2000 ◽  
Keyword(s):  
Optical Fibre ◽  
Power Transmission ◽  
Distribution Networks ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Sensing Systems ◽  
Transmission And Distribution

A Novel FACTS Based (DDSC) Compensator for Power-Quality Enhancement of L.V. Distribution Feeder with a Dispersed Wind Generator

2006 ◽  
Vol 7 (3) ◽  
Author(s):  
Adel M Sharaf ◽  
Khaled Mohamed Abo-Al-Ez
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Power Transmission ◽  
Traditional Approach ◽  
Distribution Networks ◽  
System Capacity ◽  
Quality Enhancement ◽  
Wind Generator ◽  
Transmission And Distribution

In a deregulated electric service environment, an effective electric transmission and distribution networks are vital to the competitive environment of reliable electric service. Power quality (PQ) is an item of steadily increasing concern in power transmission and distribution. The traditional approach to overcoming capacity and quality limitations in power transmission and distribution in many cases is the addition of new transmission and/or generating capacity. This, however, may not be practicable or desirable in the real case, for many of reasons. From technical, economical and environmental points of view, there are two important - and most of the time combined - alternatives for building new transmission or distribution networks to enhance the transmission system capacity, and power quality: the Flexible alternating current transmission devices and controllers, and the distributed generation resources near the load centers. The connection of distributed generation to the distribution grid may influence the stability of the power system, i.e. angle, frequency and voltage stability. It might also have an impact on the protection selectivity, and the frequency and voltage control in the system. This paper presents a low cost FACTS based Dynamic Distribution System Compensator (DDSC) scheme for voltage stabilization and power transfer and quality enhancement of the distribution feeders connected to a dispersed wind generator, using MATLAB/ SimPower System simulation tool.

Extending the constraint propagation of intervals

1990 ◽  
Vol 4 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Allen C. Ward ◽  
Tomás Lozano-Pérez ◽  
Warren P. Seering
Keyword(s):  
Power Transmission ◽  
Mechanical Design ◽  
Constraint Propagation ◽  
Temperature Sensing ◽  
Quantitative Reasoning ◽  
Sensing Systems ◽  
Physical Objects ◽  
High Level

We show that the usual notion of constraint propagation is but one of a number of similar inferences useful in quantitative reasoning about physical objects. These inferences are expressed formally as rules for the propagation of ‘labeled intervals’ through equations. We prove the rules' correctness and illustrate their utility for reasoning about objects (such as motors or transmissions) which assume a continuum of different states. The inferences are the basis of a ‘mechanical design compiler’, which has correctly produced detailed designs from ‘high level’ descriptions for a variety of power transmission and temperature sensing systems.

A method for extensive spatiotemporal assessment of soil temperatures during an experimental fire using distributed temperature sensing in optical fibre

2018 ◽  
Vol 27 (2) ◽  
pp. 135 ◽  
Author(s):  
Ryan Tangney ◽  
Nader A. Issa ◽  
David J. Merritt ◽  
John N. Callow ◽  
Ben P. Miller
Keyword(s):  
Spatial Resolution ◽  
Optical Fibre ◽  
Fire Ecology ◽  
Temperature Sensing ◽  
Measurement Unit ◽  
Data Visualisation ◽  
Fuel Reduction ◽  
Distributed Temperature Sensing ◽  
Soil Temperatures ◽  
Ecological Applications

The use of distributed temperature sensing (DTS) for ecological applications has increased rapidly in the last 6 years. Here we demonstrate the first use of DTS to measure soil temperatures during a fuel reduction burn – in an urban grassy Tuart–Banksia woodland remnant near Perth, Western Australia. Optical fibre with an acrylate material coating (diameter 242μm), but no other jacketing or cabling, was buried in the soil at depths between 0 and 5cm. Measurements were recorded over 316m of optical fibre using a DTS measurement unit, providing data over a 5.5-h period at 20-s intervals; resulting in 1243 temporal measurements at 60-cm spatial resolution. Soil temperatures were calibrated to an error of±6.8% at 250°C. Methods for installation, calibration and data visualisation are presented. Issues associated with assessment of DTS data in a fire ecology context are discussed.

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