ON-LINE COMPUTATION OF ELECTRICAL ENERGY QUALITY RATES
The authors propose to analyze the quality rates of electrical power with the help of microprocessors and specially designed software. In order to compute the rates the authors created a technique to complete a database of rates through digital on-line filtering. The suggested technique of application of Kalman-Bucy filter method for filtering measured data in the problems of quality analysis of the power, which enters the network after DC voltage transformation from the outlet of autonomous generator for non-traction and non-transport customers into the AC current with the help of invertor, allows to analyze on-line electrical power quality rates. Using algorithm of digital filtering the authors have formed a sequence of values of a discrete function у = f(t). The numerical analysis of that function gives possibility to determine on-line all power quality rates as well as auxiliary rates, stipulated by state standard 13109-97. KEY WORDS: system of power supply, renewable electrical power sources, railway centers of data processing, digital filter, filtering algorithm, electrical network parameters, power quality rates. REFERENCES 1.Samarsky A.A., Gulin A.V. Numerical methods [Chislennye metody], Moscow, Nauka editions, 1989, 430 p. 2. Samarov E.K. Interpolation of functions by quadratic splines and its application for diagnostics of the electrical power quality [Interpoliatsia funkciy kvadratichnymi splainami i ee primenenie dlia diagnostiki kachestva electricheskoy energii]. Proceedings of 10th international scientific and practical conference “Science for services”, Moscow, MGUS, 2005, pp.38-40. 3. Artushenko V.M., Samarov E.K. Application of Kalman-Bucy filter in the problems of analysis of electrical power quality [Primenenie algoritma filtratsii Kalmana-Biusi v zadachah analiza kachestva elektroenergii]. Elektrotehnicheskiye i informatsionnye komplexy i systemy [Electro technical and information complexes and systems], 2006, Iss.1, Vol.2, pp.17-23.