Methods for one-sided determination of the location of power lines’ damage are of interest to all parts of the companies involved in the supply and redistribution of electricity. The advantage of one-sided methods for determining the location of damage by emergency mode parameters is the ability to determine the distance to the place of damage without transmitting information about emergency mode parameters from the opposite end of the line. Such methods are extremely promising from the point of view of reducing the costs of maintaining power lines. The section provides a classification of methods for one-sided determination of the location of damage. The mathematical model developed by the authors is described for one-sided determination of the place of damage to the power line by emergency mode parameters for the cases of single-phase, two-phase, three-phase short circuits. A technique for determining the location of damage of a line is disclosed.

Automation of damage location is based on the device and a set of algorithms. The device is built on the basis of a digital oscilloscope based on a computer (alarm recording). It allows to record and store information about the instantaneous values ​​of currents and voltages in three phases of all lines suitable for the substation. Further processing of instantaneous values, performed by the device—analyzer of fixed alarms, gives the desired set of mode parameters at the measurement point. The chapter provides a block diagram of the device. The choice of the moment of the beginning and the duration of the emergency analysis interval is described. The section shows the difference between the developed device and analogs. The main advantage of the developed device is the ability to analyze the modes according to secondary informative parameters obtained after processing the instantaneous values ​​of currents and voltages in the interval of analysis of the emergency mode. In this case, it becomes possible to use the criteria for determining the type of short circuit and the special phase. The block diagrams of algorithms of types of short circuits and a special phase are given. Also given the principles by which the location of a short circuit is determined.

Purpose. The purpose of work is the analysis of scientific and technical information for determination of expediency of researches on the determined calculations of individual share of suppliers and consumers in violation of quality of electric energy on indicators of fluctuations of voltage. Methodology. Today the indicators characterizing fluctuations of voltage aren't considered: scope of change of voltage (δUt) and dose of a flicker (Pt). These indicators represent long changes of characteristics of tension that assumes potential opportunity for studying of regularities of their emergence and the determined distribution of responsibility for these violations between subjects. Results. As showed by results of research: fluctuations of voltage make negative impact on sight of the person and functioning of the electric equipment; in a network there is a large number of possible sources of fluctuation of tension; there are ways of identification of fluctuation of voltage; there are methods of decrease in fluctuation of voltage. The analysis of literature didn't reveal development by definition of responsibility of subjects for violation of requirements to quality of electric energy regarding fluctuations of voltage. Originality. Performance of development in this direction will make definition of responsibility for violation of quality of electric energy fuller and basic. Practical value. This research will allow to develop further the metering device which defines responsibility according to the current legislation, and has flexible algorithm for further improvement. to the legislation, also has flexible algorithm for further improvement.

Purpose. The purpose of work is the analysis of scientific and technical information for determination of expediency of researches on the determined calculations of individual share of suppliers and consumers in violation of quality of electric energy on indicators of fluctuations of voltage. Methodology. Today the indicators characterizing fluctuations of voltage aren't considered: scope of change of voltage (δUt) and dose of a flicker (Pt). These indicators represent long changes of characteristics of tension that assumes potential opportunity for studying of regularities of their emergence and the determined distribution of responsibility for these violations between subjects. Results. As showed by results of research: fluctuations of voltage make negative impact on sight of the person and functioning of the electric equipment; in a network there is a large number of possible sources of fluctuation of tension; there are ways of identification of fluctuation of voltage; there are methods of decrease in fluctuation of voltage. The analysis of literature didn't reveal development by definition of responsibility of subjects for violation of requirements to quality of electric energy regarding fluctuations of voltage. Originality. Performance of development in this direction will make definition of responsibility for violation of quality of electric energy fuller and basic. Practical value. This research will allow to develop further the metering device which defines responsibility according to the current legislation, and has flexible algorithm for further improvement. to the legislation, also has flexible algorithm for further improvement.

Purpose. The purpose of work is development of a method of definition of the location of a source of fluctuations of voltage. Methodology. The reasons of emergence of fluctuations of voltage at an arrangement of a source both in power lines, and in the consumer's networks, are connected with changes of consumption and active and reactive capacities. As criterion for definition of the location of a source of fluctuations of voltage we choose change of size of the active power received by reception substation on equivalent communication with system. The source of fluctuations of voltage is external for the consumer if emergence of fluctuations of voltage leads to the coordinated changes of tension and consumed in the area of active power that corresponds to a condition of the positive regulating effect of active loading on voltage (1). The source of fluctuations of voltage is internal for the consumer if emergence of fluctuations of voltage leads to counter changes of tension and consumed in the area of active power that resembles a condition of the negative regulating effect of active loading on voltage superficially (6). Results. The method of definition of the location of a source of fluctuations of voltage in an electric network which, works by the principle of an assessment of correlation of change of power and tension in a power supply network is developed. The method allows to consider shift between extrema of curves of change of voltage of U(t) and power of Pload(t). Originality. The method of definition of an arrangement of a source of fluctuations of voltage is developed. Practical value. The answer to this question where the source of fluctuations of voltage (in the territory of the consumer is located or in an external network) confirmed with the determined calculation, can form a basis of the expert opinion for the solution of legal disputes at an assessment of the damages caused by poor quality of electric energy.

A fault location automation technique is introduced in the article. An emergency mode analyzer block scheme is given, a specific phase and short circuit type automatic determination algorithm is developed.

One of the most important tasks of electrical engineering is the faultless providing electrical power to consumers. One of the approaches for resolving this task is the maintenance of capability to control electric systems either in ordinary or emergency situation. Electric systems belong to the class of complex-organized systems where a state of the system is identified by the state of characterizing information parameters. Functioning of any complex-organized control system or real-time decision-making system is determined by the optimal modes of its subsystems. Damages of electric transmission lines usually cause faults in providing electrical power to consumers, decrease of quality and increase of losses of power. For the quick restore of a damaged electric line it is necessary to quickly allocate an exact place of the damage and generate a dispatcher ' s decision for fixing causes and consequences of the damage. An important task of dispatching control of contemporary electric systems is the development of systems of decision-making support in emergency situations. This work is devoted to development of such system based on processing operating modes of electric systems and geoinformation control of the operating modes.