Jayaweera D.,Curtin University Australia |
Islam S.,Curtin University Australia |
Tinney P.,Western Power
2010 IEEE 11th International Conference on Probabilistic Methods Applied to Power Systems, PMAPS 2010 | Year: 2010
Among the intermittent distributed generation technologies the wind generation play a key role in supplying energy to modern grid customers. The characteristics of wind are intermittent and intermittent wind effects on power networks are analyzed using time series models or analytically using probability density functions and combinatorial effects of events. Analytical methods are limited by number of uncertainties in a network; however, current advances in smart control technologies enable to contain number of uncertainties and their interactions. Considering these facts into account, the paper presents analytical techniques to quantify expected system losses, voltage rise effects, firm power output of wind plants, and likelihood of such effects in a distribution network. The paper also presents a formulation to quantify the wind integration capacity limit by controlling the voltage rise effects. A case study is presented to demonstrate the realistic values of techniques. Results suggest that wind generation capacity can be increased by knowing the likelihood of high wind speed. © 2010 IEEE.
Martin D.,Queensland University of Technology |
Saha T.,Queensland University of Technology |
Allan D.,Queensland University of Technology |
Williams K.,Western Power
8th International Conference on Electrical and Computer Engineering: Advancing Technology for a Better Tomorrow, ICECE 2014 | Year: 2015
Efforts have been underway to estimate the life remaining of the paper insulation used in power transformers, and thus estimate the remaining life of the whole unit. However, one problem encountered when estimating remaining life is that the current state of the paper is not often exactly known. One method to determine the condition of paper is to measure the furan content of the oil to estimate the degree of polymerization of the paper. However, one problem with this technique is that paper does not age uniformly within a transformer. In particular, paper usually degrades fastest at the top of the winding where the temperature is highest. We therefore set out to determine whether a correlation exists between the condition of the paper at the top of the winding and that inferred by the furan content of the oil. Samples of paper from sixteen decommissioned transformers were used to investigate the rates at which paper degrades at the top of the winding. These results imply that the rate of ageing of paper in this location did not exceed double that calculated from using oil furan content. © 2014 IEEE.
Sharafi D.,Western Power
Australian Journal of Electrical and Electronics Engineering | Year: 2010
Distribution protection equipment have become so sophisticated and advanced in recent years that they can accommodate numerous protection functions and capabilities that once were only in the realm of transmission networks. As such, protective equipment in distribution networks can now match the functionality of the same devices in transmission. Similarly, test equipment designed for verification of protection systems have become very practicable in application to both transmission and distribution networks'equipment and assets. There is now a need to apply design principles in distribution networks that are aligned to transmission concepts. This paper aims to put forward a case for earth grid design in distribution networks by showcasing a study in which transmission design and testing principles were applied to a distribution site, and discuss the results obtained from this approach. © Institution of Engineers Australia, 2010.
Abu-Siada A.,Curtin University Australia |
Karunar C.,Western Power
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2012
This paper investigates different approaches to improve the power transfer capability (PTC) of transmission lines. Study was performed on the Eastern Gold Fields (EGF) area of the Western Power network in Western Australia where power transfer to this area is currently enhanced using four saturable reactor types static var Compensators (SR SVCs) installed in this region. These SR SVCs have reached to the end of operational life and they are scheduled for replacement by different dynamic reactive power devices such as Static Synchronous Compensators (STATCOMs) or Thyristor Controlled SVCs (TSVCs). Another proposed option to enhance the PTC to this area is by upgrading the 220 kV transmission line to 275 kV transmission line and / or using series capacitor compensation. This paper introduces technical and economical study for the aforementioned options and suggests a reliable and cost effective approach to improve the PTC to EGF area.
Abu-Siada A.,Curtin University Australia |
Lai S.P.,Western Power |
Islam S.M.,Curtin University Australia
IEEE Transactions on Power Delivery | Year: 2012
An ultraviolet-to-visible (UV-Vis) spectroscopic analysis based on the fuzzy-logic approach has been developed for furan content measurement in transformer oil. Following the successful identification and quantification of furan derivatives in transformer oil by the ASTM D 5837 standard, the new approach is able to approximate the furan content with a more convenient and economical method. Since the furan concentration level would determine the absorption intensity in the UV-Vis spectral range, the fuzzy-logic software model developed would exploit this characteristic to aggregate the furans content level in transformer oil. The UV-Vis spectral response sensitivity to ambient temperature was also studied. The proposed technique provide a convenient alternative to conventional techniques, namely: high-performance liquid chromatography (HPLC) or gas chromatography-mass spectrometry (GC/MS) methods. © 2012 IEEE.