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The real-world performance of inverters is investigated across their full range of operation, concentrating on harmonic distortion and power factor. The inverters under review are representative of a cross-section of the UK market in terms of price and device quality. They include both voltage and current source converter topologies. The test results are compared against the relevant clauses of the...
Conservation voltage reduction (CVR) is an energy conservation tool that various network operators have used to manage demand on their networks over the past few decades. Renewed interest in this approach, coupled with the changing composition of domestic electricity demand has prompted debate about the role of CVR within future networks. This paper discusses some of the contemporary power quality...
The need for fast response demand side participation (DSP) has never been greater due to increased wind power penetration. White domestic goods suppliers are currently developing a ‘smart’ chip for a range of domestic appliances (e.g. refrigeration units, tumble dryers and storage heaters) to support the home as a DSP unit in future power systems. This paper presents an aggregated population-based...
This paper describes a fridge-freezer smart load model, which responds to external signals from the wholesale electricity market to support grid operations while switching the fridge-freezer on and off to maintain optimum operations for the owner. The key parameters of the model are the appliance dimensions, thermal mass, the fridge and freezer thermal time constants and the compressor power consumption...
This paper proposes a probabilistic principal component analysis (PCA) approach applied to islanding detection study based on wide area PMU data. The increasing probability of uncontrolled islanding operation, according to many power system operators, is one of the biggest concerns with a large penetration of distributed renewable generation. The traditional islanding detection methods, such as RoCoF...
The results in this paper are based on a data set containing system demand, wind generation and CO2 emission between Jan 2010 and Sep 2013. The data was recorded at 15 minute intervals and reflects the macroscopic operation of the Republic of Ireland's electrical grid. The data was analyzed by investigating how daily wind generation effected daily CO2 emission across multiple days with equivalent...
A PSS/E 32 model of a real section of the Northern Ireland electrical grid was dynamically controlled with Python 2.5. In this manner data from a proposed wide area monitoring system was simulated. The area is of interest as it is a weakly coupled distribution grid with significant distributed generation. The data was used to create an optimization and protection metric that reflected reactive power...
This study characterizes the domestic loads suitable to participate in the load participation scheme to make the power system more carbon and economically efficient by shifting the electricity demand profile towards periods when there is plentiful renewable in-feed. A series of experiments have been performed on a common fridge-freezer, both completely empty and half full. The results presented are...
Electrical energy networks are increasingly making use of Information Technology to enhance the way in which the electricity delivery infrastructure operates. A ‘Smart Grid’ can be understood as an electrical network which uses applications that are somehow dependent on the exchange of information to enhance its operation. This paper evaluates telecommunications delivery technologies that are appropriate...
Telecommunications are an essential component of emerging Smart Grid technologies. Up until now, power system telecoms planning have largely focused on transmission with less investment in the distribution network. Presently there is a need for a universal system over which all messaging may be achieved. With the rise of protocols such as IEC 61850 there is growing momentum to start installing telecoms...
TV movies that respond to words spoken by viewers can simulate entertaining face-to-face conversations between each viewer and screen actors or cartoon characters in the movie. The actors and cartoons will reply responsively with lip-sync sound to words spoken by viewers. Different audio and video frames can be addressed on a videodisc to provide one of several alternative replies or alternative actions...
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