Yuriy Sychev

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• Doctor of Engineering
• Professor at Saint Petersburg Mining University

The main adverse effects of higher harmonics in operation modes of power supply systems in mines are discussed. The mathematical and simulation modeling studied nonsinusoidal regimes in mine supply systems with nonlinear loading in the form of high-powered high-voltage variable frequency drives of process unit. The mechanisms of initiation, spreadi...

Subject of research: power quality indicators, non-sinusoidal modes in power supply systems. Purpose of research: assessment of power factor components under non-sinusoidal modes for the conditions of industrial power supply systems with linear and nonlinear loads. Methods and objects of research: simulation modeling of electrical systems in the Ma...

The urgent nature of the power quality improvement in the nonlinearly loaded industrial power lines in order to ensure production efficiency is substantiated. The necessity of multi-functional compensation and filtering devices with active converters in hybrid power lines is demonstrated. The CFD feature variation of power qualities in case of chan...

The results are presented concerning the analysis of statistical data on failures of the functional units of traction electric drives of the mining dump trucks. It is established that the costs of failure recovery in the synchronous generator are higher than in a control cabinet and an asynchronous traction motor, and one of the causes of defects i...

The efficiency of a mining and processing plant depends on the level of complex mechanization of the production process. In mineral extraction, haulage is a major cost category, with haul trucks being the key component of the mining transportation system. To improve production performance, mining operations can increase their haulage turnover and r...

New sets of computer models for electromechanotronic systems containing cascade frequency converters (CFC) were developed. Models are implemented in C ++ in the ComSim proprietary development environment, as well as in MatLab. Installations in which CFCs are fed from a three-phase voltage source of limited power and feed a three-phase passive load...

The paper investigates the causes of vibrations that affect an increase in the likelihood of failure in a synchronous traction generator (a functional unit of a traction electric drive). During the tests, it turned out that the natural oscillation frequency of the diesel generator unit is significantly higher than the operating speeds of the unit,...

The paper presents the results of a study on hybrid filter operation and performance under hybrid power supply. In the study, a hybrid filter structure was developed and proved to perform a set of power quality improving functions. The paper demonstrates that it is necessary for the hybrid filter structure to be variable in order to adapt to change...

The utility model relates to the field of electrical engineering, in particular to devices for compensation of higher harmonics in electrical networks and power factor correction. The technical result is the elimination of the higher harmonics of the current and the correction of the reactive components of the nonlinear load current. It is achieved...

The urgency and necessity of choosing and justifying the structures of hybrid filter-compensating devices based on series and parallel active filters to improve the quality of electricity in the power supply systems of enterprises of the mineral resource complex is shown. Mathematical models of hybrid filter compensating devices based on parallel a...

The article is devoted to the analysis of the parameters of the non-sinusoidal modes. These parameters include the components of the total apparent power in the presence of the voltage and current harmonics such as the voltage distortion power, the current distortion power, the harmonic distortion power, the fundamental apparent power. These compon...

The necessity of usage of electrical complexes for power quality improvement on the basis of active and passive filters is proved in the paper. The main tasks, which must be solved by these complexes in the area of power quality improvement, are indicated. The mathematical models and relationships of the main topologies of these complexes are devel...

Полезная модель относится к электротехнике и электроэнергетике, а именно к устройствам компенсации высших гармоник в электрических сетях. Устройство может быть использовано в системах электроснабжения промышленных предприятий с большим количеством нелинейной нагрузки, генерирующей гармоники тока и напряжения.

The results of theoretical and experimental studies on the problems of effective application of shunt active filters for power quality improvement and electromagnetic compatibility ensuring were presented in this article. Based on the different theories and methods, the most effective and well-studied control algorithms of shunt active filters were...

The structures of systems with high-voltage cascade frequency converters containing multi-winding transformers and low-voltage low-power converters connected in series at each output phase of the load are considered. Low-voltage blocks contain three-phase diode or active rectifiers, DC capacitor filters, single-phase stand-alone voltage inverters a...

The methodology for selecting the parameters of a parallel active filter to compensate higher harmonics in a power supply system with distributed generation has been validated. The structure of the parallel active filter based on power transducer elements is proposed in the paper. A control system for the parallel active filter in conditions of pow...

The modelling and analysis of functional modes of active compensators in conditions of distributed generation are presented in the paper. The functions of uninterruptable power supply, harmonic compensation, power factor correction by means of the shunt active compensator with the output passive filter and the common direct current link with the lo...

Dependences of indicators of quality of electric energy on a configuration of the consecutive filter in the conditions of parameters of the feeding network and the connected loading of the enterprises of oil production which allow increasing efficiency of compensation of the highest harmonics in power supply systems of various configurations are re...

This paper deals with the problem of the efficient application of the series active filter in conditions of power supply systems of oil production enterprises with non-linear load and voltage dips. The mathematical model of the power supply system of oil production enterprise with the connected series active filter is developed. The control system...

Actuality of highest harmonics hybrid compensation in currents and voltages was gained to improve efficiency of oil fields power supply equipment. A positive effect is achieved due to implementation of active and passive filters in centralized and autonomous power supply systems with high percentage of non-linear loads. There was an observed struct...

The present article is to select the key parameters of a shunt active filter in the conditions of centralized and distributed power supply systems. The main equations which reflect the dependences of shunt active filter key parameters with network and load characteristics are presented. A mathematical model of a generalized industrial electric netw...

The paper presents data on the power quality and development of protective devices for the power networks with distributed generation (DG).The research has shown that power quality requirements for DG networks differ from conventional ones. That is why main tendencies, protective equipment and filters should be modified. There isa developed algorit...

This article analyses the statistical level of fire danger in living premises. Its influence on the reliability of apartments' electrical system is estimated and role of spark protection devices in this process is designated. In addition, a role of harmonic currents in the process of dangerous contact joints detection shown and described. In the co...

Development results of invariant protection of high-voltage motors at incomplete single-phase ground faults are observed in the article. It is established that current protections have low action selectivity because of an inadmissible decrease in entrance signals during the shirt circuit occurrence in the place of transient resistance. The structur...

Main tendencies of growth of electric energy consumption in general and mining industries were analyzed in the paper. A key role of electric drive in this process was designated. A review about advantages and disadvantages of unregulated gearboxes with mechanical units that are commonly used in domestically produced gas-turbine engines was made. Th...

This article observes maintenance problems of PWM-Electric Drive in Power Networks with distributed generation (DG). Compared to conventional centralized networks harmonics disturbances and non-sinusoidal waveforms happen faster in DG networks due to bigger amount of non-linear loads (Frequency and Power AC and DC Converters, PWM-Electric Drive, et...

The structure of the hybrid harmonic compensation device adapted for variable speed drive system is proposed in the paper. The main feature of the proposed device is the usage of common direct current link both for inverter of power frequency converter and for inverter of active part of the hybrid device. This decision allows to decrease the cost o...

The complex system of control, monitoring and improvement of power quality in power supply systems of oil production enterprises is designed, which also allows to decrease the negative influence on the environment. The main reasons for mismatch between the actual electricity quality in distribution network and the requirements for oil producing bus...

The main topic of presented article is the effective application of alternative and renewable energy sources with demanded level of power quality and electromagnetic compatibility. This decision is especially actual in conditions of industrial enterprises with continuous mode of technological process and responsible consumers. The configuration of...

Полезная модель относится к электроэнергетике и может быть использована в электрических сетях напряжением 6-35 кВ, работающих с изолированной или резистивно-заземленной нейтралью при однофазных замыканиях на землю (ОЗЗ) через переходное сопротивление.

Nowadays current protection against single-phase short circuits in electric networks 6-35 kV of the mountain entities work for the earth not selectively that leads to unjustified shutdowns and idle times of electric equipment. The reason for that presence of transitional resistance in a contour of the zero sequence which lowers sensitivity of prote...

The paper is devoted to the problem of creation and development of effective and perspective control means and methods for correction of voltage and current level and harmonic spectrum by means of active and hybrid correction systems. The main types and topologies of active and hybrid correction systems on the base of active and passive filters are...

The article conveys about the characteristics of electrolyser-based power supply at non-ferrous metallurgy enterprises, thoroughly assesses the shortcomings of the existing electro-technical transformation complexes. Diode and thyristor rectifiers, widely used in this sector, greatly impact the form of current-voltage curves of supply networks and...

The paper deals with the problem of creation and developing of effective and perspective control means and methods for correction of voltage and current level and harmonic spectrum by means of active and hybrid correction systems in conditions of distributed generation on the base of renewable and alternative power sources. The main types of active...

This paper devotes to the power quality increasing and electromagnetic compatibility ensuring problem in electrical networks of industrial enterprises with intensive application of nonlinear load, such as power converters of variable speed drive systems. The application of proposed hybrid active filter as a kind of effective decision for power qual...

The article deals with the problem of voltage dips, deviations and distortions active compensation in power supply systems with highly variable load and long lines. The main results of theoretical and experimental researches carried out in power supply systems of oil-production enterprises are presented. The relationships between acceptable value a...

This paper deals with power quality increasing problem in power supply systems of industrial enterprises with intensive nonlinear load spread. The negative influence of nonlinear load on the performance of main electrical equipment in any industrial area and energy saving level is shown. The main existing passive devices and decisions for voltage a...

The article is devoted to the problem of complex ensuring of energy safety of oil production enterprises. The basic technical requirements for energy safety ensuring at oil production enterprises are given. The main factors, which influence on energy safety level at power supply of oil production enterprises, are detected. The evaluation of energy...

The intelligent active-adaptive power system of industrial enterprises is proposed in this paper. The main elements of proposed system and active-adaptive principle of control interaction between them are detected. The main functions of proposed intelligent power system in conditions of geographically-distributed consumers of raw mineral complex ar...

The article is devoted to modern information technologies application in power industry. In the article the structure of intelligent system of monitoring and control of power supply and consumption is proposed. The proposed system is developed for conditions of distributed generation on the basis of alternative and renewable power sources at the en...

The necessity of voltage dips and distortions compensation in electrical networks of oil production enterprises is proved. The main reasons of voltage dips and distortions appearance in electrical networks of oil production enterprises are detected. The number of technical means for voltage dips and distortions effective compensation in oil product...

The article pointed the necessity of uninterruptible power supply using for guaranteed power supply of important in criterion of technological process continuity of oil production consumers. The necessity, effectiveness and reasonability of shunt active filters application for voltage and current harmonics, created by uninterruptible power supply,...

FIELD: electricity.SUBSTANCE: power generation system comprises a motor, a movable shaft, a fuel system, at least one motor sensor, an electric generator, a generator power sensor, a load capacity sensor, a power electronics unit, a motor and generator control system, a heat exchanger, a compressor device, a power device and an expansion device, be...

FIELD: electricity. ^ SUBSTANCE: application: in the field of electric engineering and power engineering. The device comprises an on-load tap changer, busbars, a metering voltage transformer, a controller, an analog-to-digital converter, a unit for setting permanent load and connection parameters, a memory module, a fuzzying unit, a unit of fuzzy a...

The experimental researches of shunt active filters operating mode was carried out in field distributive network of Priobskoye deposit (RN-Yuganskneftegaz LLC. The total harmonic distortion of voltage and current curves is detected in different operating modes of nonlinear loads and shunt active filters. The dependence between total harmonic distor...

Device allows controlling voltage deviation and reactive power in electric networks of industrial facilities for which frequent voltage falls of various strength are typical, due to frequent start-up of heavy-duty motors and load switching with various operating mode. Method is implemented as per application means of transformer with load voltage c...

Device comprises the first power transformer without an on-load tap changer (OLTC); the second power booster transformer with the OLTC device on the secondary winding; a three-phase uncontrollable rectifier; a capacitor; the first and second three-phase inverters; the first and second measurement voltage transformers; a measurement current transfor...

Device comprises an inverter, an accumulating capacitor, an output smoothening passive filter and a control system controller, at the same time the control system controller is equipped with a sensor of filter current, a sensor of grid current, a voltage sensor, a pulse shaper on the basis of relay controllers with variable width of hysteresis, pha...

The experimental researches of parallel active filters operating mode was carried out in field distributive network of JSC «Orenburgneft» TNK-BP with capacitors banks. The curve shape registration and magnitude measurements of field network voltage and current were made at different operation mode of active filters and capacitor banks. The analysis...

Method consists in generation of pulses of control of power keys of inverter with application of phase synchronisation of voltage and current of grid, processing of signals from sensors of voltage by phase converter to phase synchronisation of voltage and current. At the same time output signals from sensor of grid current arrive at the inlet of th...

The industrial test of active filter Electon FSA was carried out in field distributive network of Orenburgneft OAO TNK-BP with nonlinear load. The structure and operation principle of shunt active filter Electon FSA-400 is presented. The curve shape registration and magnitude measurements of field network voltage and current were made at different...