Faculty: Electrotechnical

Speciality: Electric systems and networks

Theme of master's work:

Improvement of subsystem of model support of acceptance of decisions by the personnel of electroenergy objects

At writing of the given abstract of thesis master's degree work is not yet completed. Final completion: December 2008. The complete text of work and materials on a theme can be got at an author or his leader after the indicated date.

ACTUALITY

The change of operating conditions of electroenergy objects, related to structural alteration of energy and introduction of power market is accompanied by decentralization of management, by the rise of system requirements management. Co-operation of considerable number of subjects at the power market results in creation of the scheme-regime states of power objects, when for providing of necessary level of reliability it is necessary to analyse the considerable greater number of dynamic situations, and and technological tasks of management. As a result of division of single technological process control of production, transmission, distributing and consumption of electric power on the types of activity, the risks in an electroenergy were considerably multiplied. Therefore an actual task is perfection of the systems of automatic and automated control by the systems of elektrosnabgeniya. Creation of such systems of management, which provide the decision of technological tasks of management at a high-quality new level, is linked with the use of modern information technologies achievements in a microprocessor technique. The rise of efficiency of functioning of the system of the automated management indissoluble is related to creation of subsystem of support of acceptance of decisions by the personnel of electroenergy objects. Are presently used in the automated systems of management informative, model and expert supports of acceptance of decisions by a personnel are used relatively independently, which. It should be noted that expert support only begins to be intensively used. Introduction of technologies of flexible lines of electricity transmissions with the multifunction devices FACTS,
modern fast-acting control units by the modes, intensive introduction of microprocessor devices of defence and automation is also related to perfection of mathematical models of elements of the electric systems and modes, models of devices of defence and management. Efficiency of imitation design relies on realization of adaptation of models to current status of electroenergy object, purpose of management, to the features of physical the phenomena of stages of sequences of dynamic situations.

REVIEW of EXISTENT RESEARCHES

Existent facilities of imitation design of objects of the electroenergy systems can be analysed on different signs, including by general recommendation of tasks. So for implementation of scientific tasks by an engineer-researcher the mnogotselevie imitation packages MATLAB/Simulink, MATCAD, Simnon, Modelica, ARENE and dr. are more adjusted however their use in the automated system of management for the decision of technological to exploitation not effectively on the row of reasons, and above all things from complication of man-machine interface. The specialized packages which are used by the personnel of electroenergy objects, in most hard mathematical models in which the modern devices are reflected not to a full degree are used relatively. Intensive development of the systems of collection of information including by an emergency the possibility of operative construction of equivalent models of contiguous electroenergy objects provides with predistoriey of its origin that the dimension of model at providing of high exactness of decision of technological task of management provides the decline.

PURPOSE OF WORK

Perfection of model support of process of acceptance of decisions by a personnel on the basis of development of imitation design of electroenergy object at consideration of contiguous subsystems is the purpose of work by equivalents which are built from data of measuring. For achievement of the put purpose it is necessary to decide the following tasks:
- to execute the analysis of mathematical models of the typical devices FACTS and create the generalized model of device, which would reflect functional possibilities of concrete devices by the values of functions of tuning;
- to develop an algorithm for determination of optimum place of location of control unit by the streams of power in an electric network;
- to use for the design of elements of electric network mnogopolyusniki for the record of equalizations of electroenergy object in phase co-ordinates, that will allow operative adaptation to the model to the concrete terms.

THEORETICAL PART

Most digital oscillographs now are the off-line units intended for registration of local emergency processes, I.e. such processes the creature of which can be deciphered from data from one recorder. Such systems justify itself at the use on relatively simple objects, where for decoding of process it is enough to have one ostsillogrammu, having attachment to the arbitrary scale of time. On large objects, a lot of the having joining autonomous oscillographs turn out of the little use. For decoding of emergency process combination of data from different recorders is here needed. Combination of data from the unsynchronized recorders is an enough intricate problem for the decision which needs the personnel of high qualification. It is out of the question about the use of such ostsillogramm, for example, by a duty personnel. A task still more becomes complicated if as information generators even on one substation the data from the heterogeneous devices are used, for example, from autonomous digital recorders and from the microprocessor devices of relay defence, OMP recorders of quality and meters of electric power and etc., which informative blocks fixative information about an emergency process are in. Emergency data are most difficult for decoding entering general controller's center of electric network in the case of difficult system failure engulfing a few substations and power-stations. Complication of decoding of such emergency data is related not only to the problems of temporal synchronization but also with the necessity of consideration of very large volume of information. It should be noted that the lines of electricity transmissions (LEP) are the most vulnerable link of the electroenergy systems. However to the present tense the visual examination LEP at a pedestrian round is the basic method of determination of places
of damages (OMP). In spite of wide researches in area of OMP LEP the scientific search of reliable and exact algorithms will still proceed. Lately the all more of attention are spared to the OMP methods based on the LEP model with the distributed parameters. An experimental complex on research of such methods OMP was therefore developed. Basic features of the OMP methods based on the LEP model with the distributed parameters and determining the structure of research complex, are related to
the necessity:

- one and two-sided measuring of currents and tensions on the LEP ends; - digital treatment of signals in the wide range of frequencies and peak values; - realization of the set set of the algorithms
related to OMP LEP; - storages of large data arrays for subsequent experimental researches of high-quality indexes of the OMP LEP algorithms;
- providing of not only reception but also radiation of signals during realization of methods of the active sounding LEP;
- synchronous two-sided measuring for adequate combination of the information got from different ends LEP. The indicated
features defined composition and structure of the developed research complex presented on the fig. 1.

The fig. 1. - Research complex of the OMP LEP methods (animation is done in 3D Flash animator, 5 shots)

OWN DEVELOPMENTS AND RESULTS

Own developments for complete automation of workplace of controller on an object are also conducted. A software product is executed in an environment With ++ and still passes the stage of improvement. Experimental researches are conducted in the described higher «MATLAB program» which enough exactly allows to present the mathematical model of processes.

LITERATURE

List of the used literature:
1. Argannikov E.A., Lukoyanov V.Yu., Misrihanov M.Sh. Locationshort circuit on the high-voltage lines of electricity transmission / Under red. V.A.Shuina. - M.: Energoatomizdat, 2003.-272 with.
2. Shalit G.M. Determination of sites of damage in electric networks. -M.:Energoatomzidat, 1982.-312 with.
3. Johns A.T., Saltman S.K. Digital Protection for Power Systems; IEE Power Series 15Peter Peregrims Ltd, 1995. - 203 with.
4. Systems radio electronic: bases of construction and theory. Reference book / Under red Ya.D. The Shirmana.-M.: Joint-Stock
COMPANY “MAKVIS”, 1998. – 828 s.5. V.V. Grigorev, N.A. Doni, A.N. Birg. «Program «large model» – dynamic tests of relay defence at transitional processes in the grids of any configuration.» The theses of lectures are I-oy NTK CHTSRZA "Relay defence and automatic control by the electroenergy systems". Cheboksari 1997
6. O.N. Voytov, V.A. Mantrov, L.V. Semenova. «Analysis of the asymmetrical modes of the electroenergy systems and management
by them». Electricity №10, 1999