The article is devoted to the substantiation of the place of research on the use of heat electric fiber for heating overhead power lines. One of the variants of the General formulation of the problem to determine the optimal parameters of thermal fiber for heating high-voltage wires of overhead power lines in order to eliminate ice formations is proposed.
Electric power is the basic branch of the Russian economy, sustainable development and reliable operation of which largely determine the energy security of the country and are important factors for its successful economic development. In recent years, related to the reform of the power industry, special attention in many scientific and technical publications is paid to the issues of reliability. The author discusses the reliability of electricity and management of reliability in the optimization.
Тhe current state of the Park of asynchronous electric motors serving the actuators of compressor stations of main gas pipelines is Considered. The statistics of damage and damage from abnormal operation of electric drive units are given.The proposed method is reliable for identifying the cause of damage and device for its implementation. Experimental results are obtained.
This article describes General information about the necessity of modernization of technical condition assessment of high voltage switching devices. Presents the most plausible alternative to the current system of scheduled maintenance. Provides information about the objectivity of the transition to the actual repairs necessary. The conclusion about expediency of use as a measuring device PKV/М6Н with consideration of all of the benefits of using this device. The basic performance of the device.
The study is devoted to methods of the safety assessing and technical analysis of electric cables as part of automatic control systems of aircraft gas turbine engines. The actual task of increasing the accuracy of diagnostics methods of direct current (DC) electric cables is being solved.
The mathematical model of calculation of steady-state modes of rotating asynchronous machines, flux-coupling and currents of stator and rotor branches which vary in time with different frequencies is developed. The model allows us to study three-phase circuits containing synchronous machines, both in symmetric and in any asymmetric modes, including emergency ones.
The considered devices and methods of protection at the precipice of zero wire. It is noted that the known methods are either complex or do not meet the operating conditions, or do not provide the required sensitivity. The device of control of breakage of the zero wire executed on the basis of the differential automatic switch AD-12 is offered. Experimental studies have confirmed that the device provides the necessary sensitivity to zero wire breakage and high reliability.
The article describes load balancing issues of diesel-generator units of ship power plant in accordance with the Russian Maritime Register of Shipping and taking into account the features of the dependence of the specific fuel consumption of the load of diesel generator set, used for ship power plants, containing in its composition of diesel generator sets of various power ratings by selection of the optimal combination of operating generating units for a given load electricity station, based on the values of the nominal power of the generator.
Тhe current state of development of uninterruptible power supply systems using inverters and rectifier-chargers based on the schemes of pulse voltage or current converters is Considered. It is shown that the development of hardware base of power electronics systems and microcontrollers has expanded the possibilities in the construction of fundamentally new power supplies of high power. The implementation of modern methods of monitoring and control allows not only to increase the reliability of the entire system of operational DC of the object, but also to significantly extend the life of the elements of this system.
The article presents an expert system in which the knowledge base formalizes the risk of an accident in the power supply system. Fuzzy-productive knowledge base rules are formed using simple and compound fuzzy-temporal linguistic statements. The expert system allows to increase the efficiency of accident risk assessment in power supply systems.
