TABLE OF CONTENTS

 

EMPHASIS

 

Cybernetic Demands on the Way of Energy Transition

EVENTS

“POWER GRIDS” International Forum (PGIF-2019)

Modern Digital Technologies Used for Monitoring and Estimation of Power Object Technical С

ondition

Review of reports of the VI Research and Practical Conference “Technical condition monitoring and fault location of substation equipment, overhead transmission and cable lines”

 

ENERGО

EFFICIENCY

Justification of Economical Efficiency of Recloser Introduction by Means of Changing the Required Gross Revenue of a Local Grid Company

Smirnov V.V., Strel’tsov K.S., Kalinin N.V., Chernov N.A. (Tyumen Electric Networks affiliate of Rosseti Tyumen JSC)

 

Abstract. An approach to justify cost efficiency of introducing reclosers from a beneficial effect inherent in valid regulatory acts – change of gross revenue of a local grid company that gets transmission service tariffs set on the base of long-term regulation parameters, is proposed.
Keywords: required gross revenue, feasibility study, recloser, distribution network, SAIDI, SAIFI, lost energy, optimal equipment arrangement

 

NOJA Power: Creating the Most Up-to-Date Reclosers in the World

Energy Efficiency Improvement by Using Automatic Lumen Regulation System

LEDUS, LLC

 

 

 

Voltage Asymmetry in 0,4 kV Distribution Networks

Ensto Rus, LLC

 

 

 

GRIDS MANAGEMENT

Separated Calculation of Established Network Modes

Volkova T.A. (Rosseti Tyumen JSC), Lykin A.V., Fishov A.G., Enkhsaykhan E. (Novosibirsk State Technical University)

 

Abstract. The task of separated calculation of steady modes of electrical networks with distributed generation, that include Minigrids, local power supply systems, has been formulated. Minigrid mode calculation is carried out with consideration of synchronized voltage and current phasor measurements in its scheme of power distribution. General mode calculation is performed in two stages: 1) in a Minigrid and 2)in the network control center. Based on synchronized phasor measurements taken in every Minigrid, network parameters are defined along with all mode parameters, including for connections to the external network. Values of obtained voltage and power phasors at Minigrid connection points are transmitted to the upper level. Then, using Minigrid connection node models available in programming and computing suites, steady mode parameters of the general network diagram are calculated, taking into account all Minigrids that operate in the network.
Keywords: electrical networks, distributed generation, Minigrid, established modes, synchronized phasor measurements, identification of network parameters

 

JSC “UNECO” Has Registered the Increased Number of Requests for Connection to Electrical Networks in 2019

OVERHEAD TRANSMISSION LINES

 

Free-Standing Gantry Towers for 220, 330, 500 kV Overhead Transmission Lines as a Next Step in Development of Reinforced Concrete Foundations

Kachanovskaya L.I., Kasatkin S.P., Romanov F.K. (Scientific Research Laboratory of electrical grid construction, PO Energozhelezobetoninvest, LLC)

 

Abstract. Experience of development and application of reinforced concrete and metal transmission towers arranged in the unified design model – twinpost free-standing constructions with horizontal arrangement of wires and internal connections, has been studied. Modern production solutions for reinforced concrete towers and possibility of their installation on footing have delivered them benefits compared with metal towers due to sufficient cost saving in construction and less problems in maintenance.
Keywords: gantry transmission tower, reinforced concrete sectionalized rack, footing made of centrifugally-cast racks

 

On the Rate of Accidents of Overhead Lines in the Bulk Power System

Galiaskarov I.M. (JSC “CIUS-EES” – CIUS Center), Misrikhanov M.Sh., Shuntov A.V. (National Research University MPEI), Ryabchenko V.N. (JSC “NTC FGC UES”)

 

Abstract. The rate of accidents of 500 kV overhead lines in a large region has been studied during a long period of time. Failure frequency (failure rate) of overhead lines sufficiently varies affected by natural and social-economical factors in long-term periods. Wavelet patterns of the failure rate have been drawn, which reveal renewals of historical periods of failure frequency. Approaches to failure frequency forecasting in the bulk power system have been estimated.
Keywords: overhead lines, failure frequency (failure rate), waylet pattern, forecasting

 

Improving The Reliability of Overhead Power Lines, Working in Extreme Weather Conditions

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

 

Abstract. The article presents a comparative analysis of the main directions of technical re-equipment of overhead power lines operating in difficult climatic conditions. The following strategies of technical re-equipment were chosen: reduction of span length; replacement of AC wire with compact wires such as AAAC-Z, AACSRZ, GZTACSR without replacing the supports and replacing the supports with multifaceted metal with a decrease in overall span, increasing the period of repeatability up to 50 years. Eight variants of reconstruction are made. The analysis of expected mechanical loads under changing weather conditions is carried out. The most reliable are the options with a reduced span of multi-faceted metal supports when replacing the AC wire with AAAC-Z and AACSRZ wires.
Keywords: overhead power lines, compact and high-temperature wires, ice deposits

 

Modern Reinforced Concrete Towers Increase Durability and Reduce the Cost of Overhead Transmission Lines and Substations

Kachanovskaya L.I., Kasatkin S.P., Romanov P.I. (Scientific Research Laboratory of electrical grid construction, PO Energozhelezobetoninvest, LLC)

,

Rogachev M.E.

 

(Rybinskenergozhelezobeton, PO Energozhelezobetoninvest, LLC)

 

Abstract. This article reveals how modern reinforced concrete towers come back to transmission lines. Their durability is comparable with the service life of metal constructions but they are half price. The tower design for 110-500 kV transmission lines is based on sectionalized centrifuged racks, which makes transportation easier and reduces the cost of line construction. For 0,4 and 6-10 kV lines the factories of Energozhelezobetoninvest have mastered production of famous extra-strong vibrated constructions. Modern standard designs of transmission towers could be put on common digital space of the line design, where the actual information is available to all departments in need during the whole life time of an object online.
Keywords: reinforced concrete tower, sectionalized centrifuged rack, vibrated rack, footing, durability, standard design, information model

 

Adaptive Risk-Oriented Monitoring and Control System for Overhead Transmission and Cable Lines

ANTRAKS, LLC

 

 

 

CABLE LINES

 

Long Available Load Currents for Power Cables 6-110 kV with Cross Linked Polyethylene Insulation

Korotkevich M.A. (Belarusian National Technical University), Podgaysky S.I.

 

(PA “Energocomplekt”, Belarus)

 

Abstract. Long-term permissible load currents are determined in accordance with GOST R IEC 60287-1-12009 for three-core (6-35 kV voltage) and single-core (6-110 kV voltage) cables with XLPE insulation with copper and aluminum conductors, which laid singly and in groups in the ground and in the air at different calculated ambient temperatures. The conditions for laying single-core cables in the ground (along a triangle or plane), as well as the values of the coefficients of the surface effect, the proximity effect, the effect of copper screens on the total power loss in the cable are taken into account. It has been established that the long-term permissible load currents on current-carrying conductors of cables laid in air are greater (contrary to the opinion) than similar values on current-carrying conductors of cables laid in the ground.
Keywords: power cables, cross-linked polyethylene, permissible currents, laying conditions, environment temperature

 

10 Years of Innovations and Proven Quality

TATCABLE LLC

 

Early Detection of Insulation Defects in Cable Lines of All Voltage С

lasses by Using DAC, Damping AC Voltage Technology

Megger, LLC

 

 

 

Pulse-Resistive Method of Grounding of the Three-Phase Electric Network Neutral and the Physical Model it Implementing

Kachesov V.E., Finashin R.A. (Novosibirsk State Technical University)

 

Abstract. Method of pulse-resistive high-impedance neutral grounding is proposed for MV networks. The neutral (neutral-grounding) resistor is connected to the station/substation grounding wire in conditions of transient (intermittent) earth faults, when the voltage derivative in the network neutral (

duN

/

dt

) is significant. In the majority of networks (

duN

/

dt

)~ is far less in conditions of a sustained single- phase earth fault than during a transient single-phase earth fault (trans.1-ph EF), i.e. (

duN

/

dt

)trans.1-ph EF >> (

duN

/

dt

)~. This phenomenon enables efficient control of the resistive network neutral grounding mode. Operating efficiency of pulse-resistive grounding and its capability of eliminating drawbacks of permanent resistive grounding caused by increased fault power currents has been theoretically proven. A LV physical model of the electrical network has been designed and made with using different inefficient neutral grounding methods, including pulse-resistive.

Keywords: three-phase power network, neutral, grounding, resistor, neutral-to-earth voltage derivative

 

RELAY PROTECTION AND AUTOMATION

 

Study of Rotor Frequency Deviation Impact on Operating Parameter Frequency in Different Network Points

Klimova T.G., Safronov B.A. (NRU “MPEI”)

 

Abstract. When generating and grid companies create their relay protection and automation complexes that measure frequency and/or consider frequency values in other operating parameter monitoring algorithms, they have to take into account frequency fluctuations caused by variations of synchronous generator rotor speed and vector rotation speed in different situations and events in electrical grids. This article is aimed to study and to estimate quantitatively the impact of rotor speed variations on operating parameter frequency values in different network points in disturbance conditions.
Keywords: synchronous generator rotor speed, operating parameter frequency variation, “network” component in operating parameter frequency

 

EQUIPMENT

 

Development Strategies in Use

“Izolyator” С

 

ompany

 

Practice of Transportable 0,4/10(6) kV Feedback Electric Installation Application in 6-10 kV Distribution Networks of Rosseti Moscow Region Affiliates

 

Unit Package Transformer Substation for Digital Networks

ENERGOPROMALYANS Company

 

 

Power Transformer Parameter Meter SEIT-4M-K540

Chelenergopribor, LLC

 

 

DIAGNOSTICS AND MONITORING

 

Prototype Development of a Portable Analytical System for Visual Semi-Quantitative Determination of Acid Value by Express Method

Vysogorets S.P. (FSEE “PEIPK” of the Ministry of Energy of the Russian Federation)

 

Abstract. The problem of improving the methodological support of the technological processes control during the repair work is stated. A minimal set of quality indicators of a liquid dielectric indicative to regenerative processes is presented. Described the newly-created express method for estimating the acid value and the prototype of a portable analytical system for visual semi-quantitative determination of acid value in the quality management system of repairs based on physicochemical analysis.
Keywords: express method, analytical system, quality indicators, measurement, liquid dielectric

 

Estimation of Technical Condition of Power Transformers and Autotransformers for 110 kV and Higher

JSC “UNECO”

 

 

Brief Overview of Diagnosis Instruments for Overhead Line Pole Condition Monitoring

Electrotechnical Systems, LLC

 

 

LABOR PROTECTION

 

Labour Protecrion: Power С

ompany Priorities, Producer Capabilities and International Practice

Following the International Conference “Present day aspects of the energy sector of the Russian Federation” (November, 25–29, 2019, Budapest, Hungary)

 

 

How to Deliver High-Quality Electrical Safety Devices?

Following the Round Table “Provision of quality of electrical safety devices used in electrical networks. Problems of purchasing high-quality electrical safety devices” (December, 10, 2019, Moscow, VDNH, Safety and Labour Protection-2019)

 

 

INDUSTRIAL INJURIES

 

Lessons Learned from Accidents

Russian Federal Service for Ecological, Technical and Atomic Supervision

 

LARGEST WORLD POWER SYSTEMS

 

Need in Large Power Systems Does not Diminish but is Increasing

Interview with Fedor Opadchiy, GO15 Association Vice-President, Deputy Chairman of SO UPS JSC

 

 

GLOBAL EXPERIENCE

 

Failure in the Power System of Great Britain that Caused the Blackout in August, 2019

Elpidiforov V.Yu.

 

 

JOURNEY THROUGH THE PAST

 

Museum Tour. RTNM-6 – Modernized Outdoor 6 kV Thyrite Arrester

Joint project of National Research University “MPEI” and Polytechnic Museum