TABLE OF CONTENTS

 

 

>TOPICAL INTERVIEW

Power Supply Reliability is Our Top Priority

Interview with A.V. Cherezov, Deputy Minister of Energy of the Russian Federation

 

EVENTS

Brainstorming as the Way for Solving Digital Transformation Problems

IX All-Russian meeting of chief power engineers

 

POWER QUALITY

Technical Assessment Algorithm for Neutral Conductor С

ondition Based on Monitoring of Zero Sequence С

omponents of Current Fundamental Frequency

Tulsky V.N., Valianskii A.V., Inoyatov B.D. (National Research University “MPEI”),

 

Dzhuraev Sh.D. (Tajik Technical University n.a. M.S. Osimi)

 

Abstract. The causes of changes in the zero-sequence component of the current of the fundamental frequency in low-voltage networks with an increase in the transient resistance of the neutral contacts of the cable have been investigated. The reasons for the growth of the resistance of contact points of the neutral of the cables in the electric network have been defined. In this paper, the effect of changes in the value of phase current, phase angle between current and voltage, as well as the resistance of the contact points of the neutral conductor on the value of the zero sequence component of currents of the fundamental frequency has been considered. Calculations and simulation results are obtained using Matlab/Simulink software package for non-symmetric modes of operation of a 380 V electric network with a solidly grounded neutral with an increase in the transient resistance of the contact points of the neutral conductor of the cable. An algorithm for evaluation of the technical condition of the transient resistance of the contact points of neutral conductor depending on the results of instrumental monitoring of the indicators of power quality has been presented. Analysis of the reasons for the change of the coefficient of nonsymmetrical for the zero sequence component current of the fundamental frequency has been performed. According to the standards, the boundary values of the resistance of contact points of the neutral of the cable have been determined.
Keywords: power quality, zero sequence component of current, transient resistance of contact points, neutral conductor of cable

 

Intermittent Voltage Unbalance: Effect on Electric Motors and Measurement Methods

Silaev M.A., Tulsky V.N. (National Research University “MPEI”),

 

Dvorkin D.V. (Otto-von-Guericke University, Magdeburg, Germany)

 

Abstract. As of today, regular violations of regulatory requirements for power quality indexes take place in the high-voltage electrical networks of Russia. Such violations negatively affect large consumers and responsible technological processes. The largest economic damage arises at facilities where electromagnetic interference leads to power outages of electric motors. The paper analyzes voltage unbalance as one of the most dangerous interferences for electric motors. The impact of intermittent voltage unbalance on the electric motors, as well as the method of its measurement in the electrical networks are considered.
Keywords: power quality, electrical networks, electric motor vibrations, intermittent voltage unbalance, angle between symmetrical components

Development of an Electric Arc Furnace Mathematical Model

Sorokin A.F., Molchagina K.D., Sidorov A.V. (Ivanovo State Power University n.а

 

. V.I. Lenin)

 

Abstract. Electric arc furnaces (EAF) are one of the main appliances for melting the high-quality alloyed steel. Thanks to their key features – such as fast heating of a metal, upkeeping of preset temperature and chemical makeup – EAF are known as top performers in steel industry all over the world. However, due to features of the processing, electric arc furnaces exercise adverse effects on supply mains as an electric consumer. In modern Russian practice empiric methods are usually applied to consider questions connected with power quality indexes. The drawback of such methods is contained in inability to take into account all the specific features during the melting process. Authors of the article describe the process of the creating of a mathematical model which may be used either in education process or during the manufacturing.
Keywords: electric arc furnaces, arc, furnace, steel, mathematical model, DSP-20, high-current system, furnace transformer

ELECTRIC POWER METERING

 

The Technology of Determining

С

ontracted Capacity by Network Organizations

Manusov V.Z., Sedelnikov A.V.

 

(Novosibirsk State Technical University)

 

Abstract. The problem is considered in terms of determining the declared capacity for consumers of services (geographically networked and adjacent network organizations) for the purposes of settlements with Rosseti FGC UES Company for services for the transmission of electric energy through the Unified National Electrical Network. The urgency of the problem lies in the significant impact of the magnitude of the declared power on the tariff for the transmission of electricity for grid companies, and, consequently, on the cost of electricity for the end user. Anumber of alternative calculation methods are presented that have the right to exist according to the wording of current legislation. The common mechanism determining the value of the declared power and reflecting the physics of the processes in electric grid operators was composed.
Keywords: declared capacity, electrical networks, legislation

 

GRIDS MANAGEMENT

 

Improvement of Monitoring of Azerbaijan Power Grid Survivability Based on Phase-Synchronization Measurement Units

Huseynov A.M., Guliyev H.B., Suleymanov K.A. (Azerbaijan Scientific-Research and Design-Prospecting Institute of Energetic)

 

Abstract. The paper is devoted to the issue of optimal arrangement of phase-synchronization measurement units (PMU) in the nodes of 500-330-220 kV network of the Azerbaijan power grid (PG).The objective of the work is to ensure the survivability of the power grid in the conditions of functioning in the scheme of integration of PGs of Russia, Iran, Georgia, Turkey. The optimal locations of PMU arrangement in the Azerbaijani PG are determined, which provide full observability of the PG and allow to monitor the transfer capability and static stability margins, as well as to consider the dynamic processes at emergency conditions in real time. Keywords: power system, survivability, observability, optimal arrangement, phase-synchronization measurement units, integrated information and measurement system

DIGITAL SUBSTATION

 

Implementation of Digital Substation Technology in Existing Facilities

Rosseti Moscow region

 

С

 

ompany

 

 

 

 

>OVERHEAD TRANSMISSION LINES

 

Durable Reinforced Concrete Power Transmission Poles Made of Nanomodified Concrete

— the Future of Digital Distribution Networks

LLC “PO Energozhelezobetoninvest”

 

 

 

Improving the Reliability of Overhead Power Lines Working in Extreme Weather С

onditions

Shevchenko N.Ju., Soshinov A.G., Lebedeva Ju.V., Kirillova S.N. (Kamyshin Technological Institute — the branch of Volgograd State Technical University)

 

Abstract. Reliability of overhead power lines is reduced in areas with high probability of formation of ice-frost deposits. The article presents a comparative analysis of innovative types of wires of domestic production such as AST and ASPT with traditional non-insulated steel-aluminum wire. The comparison of the wire temperature values from the current load; the maximum permissible currents, ice melting currents of different thickness, the values of the preventive heating currents of the wire from the air temperature and wind speed. It is revealed that the most option is to replace the steel-aluminum wire with a high-temperature compact wire of a smaller cross section.
Keywords: overhead power lines, compact and high-temperature wires, ice-frost deposits

Joint Efforts of NILED Company

and “Rosseti” Group for Countering Counterfeit When

С

onstructing Overhead Lines with Self-Supporting Insulated Wires

NILED company

 

Protection of Overhead Transmission Lines Against Short Circuits When Conductor Galloping

FORENERGO Industrial Group

 

Installation of Special Bird Protection Devices on 6-10 kV Energized Overhead Lines

“Eс

 

o-NIOKR”, LLC

 

>CABLE LINES

Methods of Reducing the Voltage Induced on the С

able Line 6-500 kV

Dmitriev M.V. (St. Petersburg Polytechnic University)

 

Abstract. In no. 6(45), 2017 of the journal, the article “The voltage induced on the cable line 6-500 kV” was published, where it was shown that the disconnected cables can be induced with 50Hz voltage, reaching tens of Volts for each kilometer of the line length, and posing a danger to maintenance personnel. A new article on this topic is intended to complement the considerations set out in the 2017 material.
Keywords: сable line, single-phase cable, magnetic field, induced voltage, the safety of personnel

 

EQUIPMENT

 

Active Filter for Middle Voltage Networks

Mustafa G.M., Gusev S.I., Sennov Ju.M., Chistilin S.V., Siyanov A.M. (JSC “NPP LM Invertor”), Minochkin Yu.M., Tsygankov I.M. (NRC “Kurchatov Institute”)

 

Abstract. The use of hybrid active filters for higher harmonics filtering and transient damping in 3-35 kV electrical networks as an inexpensive alternative to passive resonant filters is considered. It is shown that the hybrid active filter of the AFD type, installed on 10 kV buses, supplying a powerful rectifier operating in a cyclic load mode, reduces the level of canonical and non – canonical harmonics by more than 3 times, and the interharmonic components of the voltage – to minor residues.
Keywords: passive filters, active filters, dynamic distortions

 

New Level of Rittal Production and Service – Unmatched С

ustomer Benefits

Type Test of “Izolyator” High-Voltage Bushings in India

Izolyator Company

 

Increase Reliability

Minsk Electrotechnical Plant n.a. V.I. Kozlov

 

Rittal Carriage-Type Switchgear Solutions: When Reliability is Above Anything Else

“RITTAL”, LLC

 

>DIAGNOSTICS AND MONITORING

Measurement Features and Electrical Energy Balance in the Presence of Harmonics

Bogdan V.A., Tropin V.V., Bogdan A.V. (FSBEI HE Kuban SAU)

 

Abstract. The paper provides an analysis of the methodological error that occurs when determining active power in the power lines with the presence of a significant amount of current and voltage harmonics. It is established that this error doesn’t affect the determination of active powers balance in the node, but may give measuring fault for active power of the lines outgoing from this node.
Keywords: active power, measurement, nonsinusoidal current, voltage, error, balance, harmonics, input phase angle

 

Measures to Prevent Support Insulation Failures of Shielded С

onductors Intended for Generators

Ivanovsky D.A. (“SO UPS”, JSC), Nagay V.I. (SRSPU (NPI))

 

Abstract. One of emergency shutdowns causes of power plant generators is conductors failure due to various damages of support insulation. Among the most frequent damages are insulators flashover due to their contamination, insulation breakdowns due to insulating part failure, insulation destruction because of partial discharges, and electrothermal breakdowns. The paper proves impact of various external factors on change of support insulation properties and insulation destruction during operation. Electric field, temperature and moisture are considered among afore-mentioned factors (the intensity of the impact may be different for each concrete factor). According to practical experience, the time for searching and replacing damaged insulators vary from three to five days while the total number of insulators can reach 1000 units. This results in significant expenditures for power plants operating in the wholesale electric power market. Thus, early insulation fault determination and, as a result, increasing operational integrity and ensuring continuous power supply are considered as urgent tasks.
Keywords: diagnostics of current leads support insulation, support insulation breakdowns

 

Analysis of the Effect of Parameters of 6 kV Electric Networks on the Error of Determining the Place of Damage by Empirical С

riteria

Soldatov V.A. (KSAA), Mozohin A.E. (KSTU, Rosseti Center — Kostromaenergo)

 

Abstract. The primary task identified in the energy strategy of Russia is the development of modern domestic microprocessor devices for localizing emergency situations in power grids and high-precision methods for determining the location of damage to power lines. The article “Empirical criteria for determining the location of damage in 6 kV electrical networks” justified the possibility of determining the location of damage in 6 kV networks using empirical criteria for different types of emergency conditions. In this article, the effectiveness of the proposed empirical criteria for determining the location of damage in 6 kV networks when changing the parameters of the 6 kV electrical network: the length of the line, the load power, the tangent of the load angle, the parameters of the supply and consumer transformers, the cross section of the wires, the phase coordinates of the line is investigated. Studies have shown the high efficiency of application of empirical criteria developed earlier for all possible feeder parameters. The difference in the errors of the WMD for all considered parameters is 0.73-2.48%. In this case, the error of the MLE for all emergency modes is 1.28-6.71%, except for modes with phase breaks, when the error is 10.32-15.44%.
Keywords: microprocessor device, emergency modes, fault location, empirical criterion, electric network

 

Damaged Section Indicators as Smart Devices for Monitoring, Fixing and Localizing Emergency Processes in 6-10 kV Distribution Networks

Rosseti Moscow region С

 

ompany

 

 

 

Solution for Measuring DC Resistance of High Power Transformer Windings

“Chelenergopribor”, LLC

 

>LABOR PROTECTION

The Main Approaches for Assessing the Risk of Staff Health Damage at Power Industry Facilities

Kondratyeva O.E., Loktionov O.A., Kravchenko M.V., Gunina E.A. (National Research University “MPEI”), Kulagina A.V. (Rostechnadzor)

 

Abstract. The paper analyzes the main methods of professional risk assessment, estimates the shortcomings of the existing domestic and foreign approaches and identifies key characteristics needed for developing modern risk assessment methodology. A mathematical model for assessing the risk of power engineers’ health damage based on modern methods of statistical processing is proposed. The influence of specialty, working conditions, health status, the provision of personal protective equipment, the results of accidents, and such individual characteristics of an employee as age and work experience were taken into account when developing the model.
Keywords: risk assessment methodology, health damage, electric power industry, operational and maintenance staff

 

INDUSTRIAL INJURIES

 

Lessons Learned from Accidents

Russian Federal Service for Ecological, Technical and Atomic Supervision

 

PERSONNEL TRAINING

 

Russian Federal Service for Ecological, Technical and Atomic Supervision and National Research University “MPEI” Signed a Cooperation Agreement

An Active Year for Young Professionals of Fuel and Energy Complex

>EXHIBITIONS&CONFERENCES

Electro-2019 Exhibition

RELAVEXPO-2019: Focus on the Digital Transformation of Power Engineering

>GLOBAL EXPERIENCE

 

Italy’s Power System: New Energy Sources and Market Technologies

Interview with General and Executive Director of Terna L. Ferraris