17 октября 2023
АНОНС «ЭЛЕКТРОЭНЕРГИЯ. Передача и распределение» № 5(80), сентябрь-октябрь 2023
9 статей в открытом доступеОформить подписку
Оформите подписку, чтобы получить доступ ко всем материалам выпуска, или купите нужную статью отдельно
Уже есть подписка? Тогда авторизуйтесь.
ДИАГНОСТИКА И МОНИТОРИНГ
ДИАГНОСТИКА И МОНИТОРИНГ
РЕЛЕЙНАЯ ЗАЩИТА И АВТОМАТИКА
GUEST OF THE ISSUE
Absolute Imperative in the Social Dialogue
Interview with Arkady Zamoskovny, President of Association “ERA of Russia”
State-of-the-art Technologies for a Metropolitan City
Review of the plenary session of JSC UNECO in the framework of the Moscow Urbanistic forum
A New Level of Managing the IT Infrastructure
Astra Linux Group of companies
The Mathematic Model of the Electrical Load of the Lead-in Switchgear of a Multi-Apartment House
Morsin I.A., Shvedov G.V. (NRU MPEI, Moscow)
Abstract. Regulatory documents for the design of urban power supply systems in terms of the methodology for determining the design load of multi-apartment residential buildings and the values of the specific loads of apartments have not changed over the past 20 years. In a modern multi-apartment residential building, in addition to the load of apartments and elevators, a significant contribution to the formation of electrical loads on the tires of the input switchgear is made by the loads of smoke ventilation systems, an individual heating point and fire pumps of the internal fire water supply. To update the existing methods for determining the design load of multi-apartment residential buildings, regression models were obtained, by which it is possible to determine the value of the design loads of various categories of loads of the input switchgear (ASU) of an apartment building (MKD) depending on the number of apartments and the number of floors. As a result, a mathematical model was formed to determine the design load of the ASU of a modern MKD, the verification of which showed that the values obtained by the proposed model differ from the real ones within 4%.
Keywords: estimated electrical load, input switchgear, apartment building, city power supply system
Analysis of Domestic and Foreign Practices of Distribution Network Reliability Specification
PJSC Rosseti Moscow region, National Research University MPEI
Calculation of the Distribution Network Based on Three-Phase Substitution Schemes
Krongauz D.E. (Krasnoyarsk Rail Transport Institute, a branch of Irkutsk State Transport University)
Abstract. A method for calculating the parameters of a 0,4 kV distribution electrical network based on three-phase equivalent circuits is proposed. The advantages of modeling three-phase equivalent circuits of distribution electrical networks over modeling based on single-phase equivalent circuits are shown.
Keywords: distribution network, replacement scheme, equipment of the distribution electric network
Calculation of the Payback Period of Solar Panels Taking into Account the Impact of Inflation
Abdreev K.A. (Kazan State Power Engineering University)
Abstract. Renewable energy, and in particular solar energy, is becoming increasingly popular. This is due to both the increasing environmental problem and the decreasing payback time of solar energy storage equipment. This is primarily influenced by the policy of each individual country, and the development of solar energy technologies. Increasingly, there are questions about the supply of electricity to consumers using solar panels. This would help both to reduce losses on the transportation of electricity and to reduce the environmental impact on the environment. It is also worth remembering that solar panels in a compartment with rechargeable batteries are able to provide system redundancy. In this regard, the paper gave a general view of calculating the payback period of solar energy storage equipment and derived a formula that takes into account the impact of infl ation on it. Also, the features of the voltage and current connection of various equipment and taking into account the specifics of their functioning were indicated.
Keywords: solar panels, payback period of solar panels, batteries, electricity infl ation, system redundancy, inverter, controller
Method of Sizing Battery Energy Storage Systems for Effective Integration of Power Plants Based on Renewable Energy Sources into Power Systems
Bulatov R.V., Nasyrov R.R., Burmeyster M.V. (NRU MPEI, Moscow)
Abstract. This article is devoted to the application of battery energy storage system (BESS) to ensure the required output of power plants based on renewable energy sources (RES) integrated into power system. The paper presents a model of lithium-iron-phosphate BESS, taking into account the calendar and cyclic degradation, as well as the limitations of the conversion subsystem. Determination of nominal capacity and power of BESS is proposed to be carried out on the basis of two tolerance levels: a given range of power output of a power plant based on RES and the relative time of deviation from the declared power. When selecting BESS parameters, the peculiarities of its operation were taken into account, as well as the limitations of the electric power system (EES). The developed methodology was applied on the model of the EES containing solar (SPP) and wind power plants (WPP). At the end of the article, the analysis of the results obtained is carried out.
Keywords: energy storage system, lithium-ion battery, renewable energy sources, calendar and cyclic degradation of lithium-ion cells, electric power system
Use of Energy Storage Systems at Wind Power Plants Included into the Unified Energy System of Russia
Timofeeva A.G., Samoilova A.A., Antonov A.A. (NRU MPEI, Moscow), Purshev I.A. (JSC Scientific and Technical Center of Unified Power System)
Abstract. The article discusses the installation of electricity storage systems (ESS) to existing wind power plant (WPP) and solar power plant (SPP) to preserve the payback period of their construction and also analyzes the current situation on the construction of renewable energy sources (RES) in Russia. Some types of storage devices possible for installation to renewable energy sources are considered. The prospects of using the ESS in order to increase the economic efficiency of WPP and SPP construction projects are evaluated. A technical and economic calculation of the installation of a 20 MW lithium-ion storage unit to the 60 MW Bondarevskaya WPP was carried out.
Keywords: wind power plant (WPP), electricity storage systems (ESS), renewable energy sources (RES), increasing the efficiency of RES, lithium-ion storage
ELECTRIC POWER METERING
State-of-the-art Network Oriented Methods Non-technical Electricity Losses Detection and Localization
Pazderin A.V., Verkhozin A.M., Mukhlynin N.D., Samoylenko V.O. (Ural Federal University, Ekaterinburg)
Abstract. Non-technical losses shatter economy of distribution utilities causing financial loss. Network oriented methods of non-technical electricity losses detection and localization provide detection costs reduction. Compared with data-oriented methods focused on power consumption profile anomaly detection, network-oriented methods are able to localize non-technical losses invariably due to their relevance with electrical energy balance based on metered values. Depending on calculation procedure, network-oriented methods can be subdivided to the steady state calculation methods and state estimation methods. The paper demonstrates that state estimation methods provide more accurate non-technical losses calculation and localization compared with steady state calculation methods.
Keywords: non-technical energy losses, energy frauds, electricity theft, electricity metering, metering error, distribution grids
Methodology of Forming the Mathematic Model of a Power Grid for the Non-Sinusoidal Steady Mode Calculation and the Resonance Study. Part 2. Proof-of-Methodology
Solodovnikov V.E. (OOO ETS-Energo), Flerov A.N. (JSC Rosseti Tyumen), Tulskiy V.N. (National Research University MPEI, Moscow), Shamonov R.G. (PJSC Rosseti), Korolev A.A. (Russian University of Transport (MIIT), Moscow)
Abstract. The proposed method of power system harmonic model development was tested on a selected area of the Ural Interconnected System. In the second part of the article, a description of on-site harmonic voltage measurement program is outlined. Measurements were performed at 110/6 kV substation buses (both LV and HV side). Several patterns of harmonic voltage change were revealed, which made it possible to determine an approach to model validation under the lack of measurements. It is demonstrated that the developed model adequately represents harmonic voltage factors’ variation under different grid topology and load-fl ow conditions. Frequency scan results show that over-limit voltage harmonic distortion recorded at the substation buses could be caused not only by transmission grid topology changes and load-flow variations, but also by capacitor banks operating in adjacent 0,4 kV grid.
Keywords: power quality, higher harmonics, voltage & current harmonic distortion, resonance, power system operational conditions, power system modelling
Digital Means of Power Quality Monitoring and Control
OOO Energiya Optimum
Development of the Algorithm and the Model of Optimizing the Number and Installation Locations of Active-Adaptive Sectionilizing Components with Estimation of the Efficiency of Measures Taken in a Distribution Network
Galiev I.F., Yakhin Sh.R., Pigalin A.A., Garifullin M.Sh. (Kazan State Power Engineering University)
Abstract. To date, there is no generally accepted methodology for determining the locations of optimal sectionalization of distribution network (DN) sections. Widespread use in 6(10) kV networks is made of activeadaptive elements with high efficiency: reclosers and load disconnectors that contribute to both self-recovery of DNs in case of unstable faults and automatic localization of stable ones. Implementation of the equipment should take into account the economic feasibility of its installation depending on: the values of the total under-release of electric power (EE); the points of division of the DN, affecting the value of losses; reliability indicators (RI) and cost, allowable payback period of measures. The work is aimed at solving an urgent problem – development of an algorithm and model for optimal selection of the place, type and number of sectionalizing devices in a DC equipped with intelligent EE metering devices. The criteria for decision-making are: frequency and duration of power interruptions, values of under-releases, consumer damages and load losses, while ensuring normal voltage levels at all points of power supply.
Keywords: distribution network, power supply reliability, recloser, network modeling, Monte Carlo method, optimization criterion
OVERHEAD TRANSMISSION LINES
Brunspiles for Power Utilities
OOO PO Energozhelezobetoninvest
Reduction of Energy Losses for the Corona of Overhead Power Transmission Lines of Voltage Classes 330-750 kV Using a Functional Wire Coating
Kapustin A.P., Kruss A.M., Mazikin N.V., Semendyaev R.Yu. (NTC FGC UES affi liate SibNIIE), Lebedev D.Ye. (JSC NTC FGC UES)
Abstract. This article covers the issues related to various ways of corona losses reduction on overhead power lines. Corona losses reduction is achieved by applying a special coating that has a hydrophilic or hydrophobic effect. Experiments were carried out with the following samples: superhydrophobic coating wire; hydrophilic coating wire; wire with sandblasted surface; a sample of uncoated wire after many years of operation. Experimental dependences of energy losses for the corona on the voltage level are obtained under rain.
Keywords: corona, power loss, physics simulation, superhydrophobic coating, hydrophilic coating, sandblasted wires
The Impact of Birds on the Condition and Operating Modes of the Overhead Transmission Line
Pustovaya O.A. (Far-East State Agrarian University, Blagoveschensk)
Abstract. One of the factors that impacts the formation of overhead transmission line (OHL) operating modes is the ornithological fauna. The birds that sit on an OHL tower influence the condition of towers and their components as well as the operating modes. Short circuits caused by overlapping of the air gap between phase wires due to a manure jet and phase-to-phase faults caused by phase short-circuiting via spread wings bring the major negative impact. Such faults are instable and unpredictable. Supplementary technical means like anti-settling devices which efficiency is quite disputable are used to eliminate this negative impact.
Keywords: birds, tower, insulators, phase wire, short-circuit, platform, ornithological fauna, anti-settling devices
Scientific Underpinning of Development and Application of the Modern Bird Protection Equipment in Grids
Russian Birds Conservation Union
Methods of Controlling 110-500 kV Cable Lines
DIAGNOSTICS AND MONITORING
Technical Maintenance of Cable Lines. Criteria for Choosing the Strategy and the Required Diagnostic Equipment
ООО SEBA ENGINEERING
Interpretation of the Results of HV Equipment UF-Inspection
JSC Elektrosetservis ENES, OOO Sibenergo diagnostics, Novosibirsk State Technical University NETI, NTC FGC UES affiliate SibNIIE
RELAY PROTECTION AND AUTOMATION
Definition of Parameters of the Power Transformer Replacement Diagram with the use of Synchronized Phasor Measurement Units
Avdonin P.M., Klimova T.G. (NRU MPEI, Moscow)
Abstract. The article discusses approaches of calculating the parameters of two-winding power transformer T-shaped equivalent circuit using phasor measurement units (PMU). Approaches applicability for the formation of a power transformer digital twin and the development of a monitoring system to prevent its damage are taken into account. Calculation mathematical methods (theory of electrical engineering, optimization method, Kalman filtering) for determining equivalent circuit elements resistance and inductance are presented. Calculation results according to the methods on various test models in several main modes of network operation are presented.
Keywords: transformer, failure, inter-winding fault, model, resistance, phasor measurement unit (PMU), optimization problem, Kalman filter
EXHIBITIONS AND CONFERENCES
“Power Grids” International Forum
Competition of Future-Proof Developments Within the Framework of PGIF-2023 is Completed
Reliability of Power Systems in Conditions of Present-Day Challenges and Threats
Review of the 95th meeting of International scientific seminar named after Yu.N. Rudenko “Methodical issues of studying the large energy system reliability”
INZHiR: New Personnel for Renewed Power
Competence Center of National Technology Initiative, EnergyNet
From Student to Power Professional: the Way EKF Develops the Staff Training
Total Incidents Rate Dynamics in the Power Industry of Russia and Safety Arrangements
Russian Federal Service for Ecological, Technical and Atomic Supervision; Association “ERA of Russia”