The scientifically substantiated principles of development of technology of operation of electric systems with traction loads by condition and minimum expenses during their life cycle for urban electric transport are developed. Saving quality criteria that determine resource conservation are generalized. It is proposed to expand the functions of tram wagon laboratories to measure the basic quality criteria. The scheme of expert system for analysis of the state of power supply devices and development of control effects in the analytical centers of control systems is developed. The scientifically grounded principles of the development of the technology of operation of electric systems with traction loads on the state and minimum expenses in the course of their life cycle, in particular the concept of maintenance of power supply devices on the basis of their diagnostics and monitoring, a complex automated system of diagnostics of the contact network and current collectors, means of improving quality scratching and reducing the wear of the contact wire, which collectively solves the problem of resource conservation and allows reducing operating costs 1.5–2 times. Generalized current quality criteria that determine resource conservation. It is established and experimentally confirmed that the basic criteria for the state of the contact network are contact pressing and the coefficients of reliability and economy of current flow. It is proposed to expand the functions in the field of measuring the basic criteria for servicing the contact network by state. The information technologies of an estimation of a condition of power supply devices during their operation on the basis of synthesis of two sources of information are offered: real-time diagnostics and simulation modeling. A generalized scheme of the expert system for analysis of the status of power supply devices and development of control effects in the analytical centers of control systems has been developed. Keywords: electric transport, traction substations, traction networks, diagnostics and operation, technologies, energy efficiency, resource saving.

The work is devoted to solving an urgent task - to develop a complex of scientifically-based proposals of conditions and measures that provide technologies for the operation of electricity traction networks based on energy and resource conservation. The article deals with theoretical and practical issues of technology development and repair of the contact network (CN) on state to ensure the process of passenger transportation. The technical criteria for the status of CN are determined and the technologies of maintenance are offered as monotonically changing parameter control. The set of diagnostic and reliable indicators is offered. Generalized structural diagrams of the system of assessment of the condition of the CN and the ranking of repair work taking into account the possible impact of defects. It is proposed to rank them by three characteristic features: first-class failures in which the CM as a system completely loses its capacity; type 2 failures (partial) in which the effectiveness of the functioning of the CM decreases; failures of the 3rd kind - are noted in the elements of KM for the time of work on the current composition and repair. It is shown that the use of maintenance system according to the state with parameter control is possible if: operating conditions of the CM conditions do not allow the work to failure; KM devices have high functional value with insufficient degree of reserve; there is a high level of operational adaptability and repairability. The basic criteria of the condition of the CM and the quality of current flow are summarized. Technologies based on the synthesis of probabilistic methods of parameter estimation, real diagnostics and simulation modeling of the CM state are proposed. The basic criteria of the condition of KM, which allow to estimate the resource saving during maintenance and repair, are defined.

No abstract

The technologies of OCL condition based maintenance were improved for providing reliable and economic current collecting on electrified railways and in traction power networks of urban electric transport. It is established that one of the most perspective methods of reducing operating costs is the transition to scientifically justified terms of repair and planning of works based on the actual state of OCL, the reliability of which is determined by the reliability, repair suitability and durability of the elements. The basic criteria of the current collecting process are proposed: the value of contacting pair wear, the detachment of the current collectors from the wires, the scope of oscillations of pantograph head and the contact pressure, coefficients of contact unreliability and cost savings of collecting a power from catenary, and, finally, a minimum of annual operating costs. Technology of maintenance according to Markov type parameter control is developed. Models of controlling actions on stagger and the contact wire gradient adjustment processes are developed. The standard linear programming algorithm was used to solve the problem. The application of such technology to determine the matrix of controlling actions based on the results of monitoring the stagger and the contact wire gradient is shown. The factors that determine the cost of staying in a state of stagger have been identified. The controlling actions matrices on the stagger and the contact wire gradient and the cost of staying in these gradient states are established. The technology of service with Markov approximation of wear of contact wires is offered. It has been investigated that the contact wires, primarily due to wear, are degraded during operation. Degradation processes cause gradual failures. The first group of failures: breakages, burnouts, local wear - require controlling actions to incut the insertion or putting into operation a shunt. The second group: a burnout, a decrease in the average cross-section of a wire less than the allowable one requires controlling actions to replace the wire of the entire tension length. After conducting the first type of controlling actions, the contact wire returns to the working state with the previous value of the determining parameter. When performing a second type of controlling actions, the defining parameter returns to its original state. If the quantification step is chosen such that the intensities of failures and transitions from one state to another with a sufficient degree of accuracy were constant, then the graph of states and transitions, as well as the Kolmogorov differential equations, can be used for the research. The readiness function, the density of time distribution of infallible operation, the total failure rate, and the average recovery rate from state S0i to Si are determined. Thus, all reliability indicators are defined and it is possible to use them in determining the condition of the contact wire of the tension length. Experience has shown that the most effective diagnostics of the condition of OCL devices combines the assessment of the state on mathematical, simulation models and measurements with the use of car laboratories for testing the contact network and devices for monitoring the parameters of the contact wire for the railcar. Key words –overhead contact line,contact wire, mainanance technology, controlling action models.