PV Array Driven Adjustable Speed Drive for a Lunar Base Heat Pump

A study of various aspects of Adjustable Speed Drives (ASD) is presented. A summary of the relative merits of different ASD systems presently in vogue is discussed. The advantages of using microcomputer based ASDs is now widely understood and accepted. Of the three most popular drive systems, namely the Induction Motor Drive, Switched Reluctance Motor Drive and Brushless DC Motor Drive, any one may be chosen. The choice would depend on the nature of the application and its requirements. The suitability of the above mentioned drive systems for a photovoltaic array driven ASD for an aerospace application are discussed. The discussion is based on the experience of the authors, various researchers and industry. In chapter 2 a PV array power supply scheme has been proposed, this scheme will have an enhanced reliability in addition to the other known advantages of the case where a stand alone PV array is feeding the heat pump. In chapter 3 the results of computer simulation of PV array driven induction motor drive system have been included. A discussion on these preliminary simulation results have also been included in this chapter. Chapter 4 includes a brief discussion on various control techniques for three phase induction motors. A discussion on different power devices and their various performance characteristics is given in Chapter 5

Weather-based interruption prediction in the smart grid utilizing chronological data

This unique study will demonstrate a combined effect of weather parameters on the total number of power distribution interruptions in a region. Based on common weather conditions, a theoretical model can predict interruptions and risk assessment with immediate weather conditions. Using daily and hourly weather data, the created models will predict the number of daily or by-shift interruptions. The weather and environmental conditions to be addressed will include rain, wind, temperature, lightning density, humidity, barometric pressure, snow and ice. Models will be developed to allow broad applications. Statistical and deterministic simulations of the models using the data collected will be conducted by employing existing software, and the results will be used to refine the models. Models developed in this study will be used to predict power interruptions in areas that can be readily monitored, thus validating the models. The application has resulted in defining the predicted number of interruptions in a region with a specific confidence level. Reliability is major concern for every utility. Prediction and timely action to minimize the outage duration improves reliability. Use of this predictor model with existing smart grid self-healing technology is proposed

Electric power distribution interruption risk assessment calculator

A method for predicting electrical power distribution interruptions based on common, immediate weather conditions. Daily, hourly, and bi-hourly weather data are used to predict the number of interruptions. Common weather conditions include, but are not limited to, rain, wind, temperature, lightning, humidity, barometric pressure, snow, and ice. The method includes compiling common weather data including a plurality of weather variables and the number of historical interruptions for a historical period, establishing model equations for the average value of the weather variables, combining the model equations for each of the weather variables into a composite model, and performing a regression analysis using the composite model to establish interruption prediction values. A computer program product for enabling said method and a computer system adapted to carry out said method are also included

Electric power distribution interruption risk assessment calculator

Based on common weather conditions, novel methods are disclosed for the prediction of electrical power distribution interruptions and for interruption risk assessment based on immediate weather conditions. Daily, hourly, and bi-hourly weather data are used to predict the number of interruptions and to normalize reliability indices for weather. Common weather conditions include, but are not limited to, rain, wind, temperature, lightning, humidity, barometric pressure, snow, and ice. These conditions do not occur simultaneously at any one place, and the range of combinations is great, therefore the invention allows broad application of the disclosed methods

Electric power distribution interruption risk assessment calculator

A method for predicting electrical power distribution interruptions based on common, immediate weather conditions. Daily, hourly, and bi-hourly weather data are used to predict the number of interruptions. Common weather conditions include, but are not limited to, rain, wind, temperature, lightning, humidity, barometric pressure, snow, and ice. The method includes compiling common weather data including a plurality of weather variables and the number of historical interruptions for a historical period, establishing model equations for the average value of the weather variables, combining the model equations for each of the weather variables into a composite model, and performing a regression analysis using the composite model to establish interruption prediction values. A computer program product for enabling said method and a computer system adapted to carry out said method are also included