10 октября 2024
АНОНС «ЭЛЕКТРОЭНЕРГИЯ. Передача и распределение» № 5(86), сентябрь-октябрь 2024
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УПРАВЛЕНИЕ СЕТЯМИ
УДК 621.316.1
УЧЕТ ЭЛЕКТРОЭНЕРГИИ
ВОЗОБНОВЛЯЕМАЯ ЭНЕРГИЯ
УДК 621.3.072:621.311.24
ЭНЕРГОСНАБЖЕНИЕ
УДК 621.311:621.316.1
ЭНЕРГОСНАБЖЕНИЕ
УДК 621.316.1
КАЧЕСТВО ЭЛЕКТРОЭНЕРГИИ
КАЧЕСТВО ЭЛЕКТРОЭНЕРГИИ
УДК 621.316.13:621.316.7
ЭЛЕКТРОЗАРЯДНАЯ ИНФРАСТРУКТУРА
УДК 621.316.1
КАБЕЛЬНЫЕ ЛИНИИ
УДК 621.315.21
ДИАГНОСТИКА И МОНИТОРИНГ
ОБОРУДОВАНИЕ
ОБОРУДОВАНИЕ
УДК 621.314:004.94
ВЫСТАВКИ. КОНФЕРЕНЦИИ
EVENTS
Reforms of the Integrated Power Grid: Heading to the Positive Future
Review of the panel discussion at Russian Energy Week-2024
The IXth Russian Labour Safety Week
Review of RLSW-2024
Thermal Indicators as a Brand-New Tool of Production Safety
ООО “ThermoElectrica”
EMPHASIS
OOO SVSESS – 80 Years of Successful Operation and Sustainable Leadership
OOO Srednevolzhsksel’elektroset’stroy
GRIDS MANAGEMENT
Mechanism of Prioritization of Electrical Networks Updating Taking Into Account their Failure Risks
Boyarkov D.A., Kompaneets B.S. (Altai State Technical University n.a. I.I. Polzunov, Barnaul)
Abstract. The article presents a mechanism for prioritizing the renewal of electric networks, which is based on the methodology for assessing the risks of failure of electric networks, as well as the algorithm for making management decisions on the choice of technical impacts on power grid equipment, based on risk-based management criteria. An example of the implementation of the developed prioritization mechanism for two actually functioning power grid facilities is given, as a result of which the priority of including specific electrical equipment in the repair program was justified, and the most optimal type of control technical impact was determined.
Keywords: technical condition, priority, risk, probability of failure, emergency mode, damage from power supply interruption, expert assessments, electric network, reduced costs, technical impact, management decision-making, wear and tear, repair.
ENERGY METERING
Energomera: Full Range of Technical Means for Arranging Smart Metering, a Digital Substation and a Digital RES from the Local Producer
JSC “Electrotechnical factories “Energomera”
RENEWABLE ENERGY
Selection of the Optimal WPP Connection Point with Regard to the Wide Range of Reactive Power Delivery and Receipt in Low Active Power Generation Modes
Shchipitsin P.I., Lipilin M.S., Dvorkin D.V., Volkov M.S. (JSC “STC UPS”)
Chemborisova N.Sh. (NRU “MPEI”)
Abstract. Due to dependency on weather conditions RES[1]based generating installations can continuously function without active power generation but keeping the wide range of reactive power delivery and receipt when using the inverters are used. In cases when active power generation is low or even absent, and depending on the technical performance of inverters, reactive power delivery and receipt is still possible up to the levels that exceed the installed capacity of the station (within the limits of the inverter’s overload capacitance). In such conditions when a station is incapable of performing its main function, it may be used for reactive power and voltage adjustment in the adjacent network. When the station connection point is chosen correctly, the investor gets a chance to multiply economic figures of his project on station commissioning. The article suggests an approach on the optimal selection of a connection point based on the saldo-conductivity method and the sensitivity factor method that provides for the increased manageability of the network with regard to the voltage adjustment without changing the main economic figures of the project on station commissioning by example of Novolaksk wind power plant as part of the power system of Dagestan republic.
Keywords: power generation diagrams, wind power plant, bottlenecks, saldo-conductivity method, sensitivity factor method, sensor and rigid joints
POWER SUPPLY
Impact of a 6-35 kV Transmission Line on the Operating Mode of the Local Power Supply System with Distributed Generation
Udintsev D.N., Chuvashev R.S., Ochkovskaya Yu.K. (NRU “MPEI”)
Nesterenko G.B. (Affiliate of SO UPS, JSC – Novosibirsk RDC)
Abstract. When connecting distributed energy resources (DER) for parallel operation with an external power system, the issue of selecting the cross-section of the power transmission line becomes relevant, as current methodologies do not consider the peculiarities of DER operation. When DER operates in parallel with the external power system via 6-35 kV power line, problems may arise due to sharp voltage drops and loss of stability because of abruptly variable load. For 6-35 kV power lines, a significant value of the active component of the longitudinal resistance is characteristic. Therefore, in the design process it is necessary to consider the influence of the cross-section on the stability of the DER. The aim of the study is to form additional criteria for selecting power line parameters, taking into account the peculiarities of DER operation, in order to ensure the stability and efficiency of their integration in the power system. Using mathematical modeling of a local power supply system containing a DER, the influence of the cross section of the power line on the operation of the distributed generation unit and the local electric consumer was investigated. As a result, additional criteria were proposed for selecting the cross section of the 6-35 kV power line connecting the DER with the external power system. The results of the study can be applied in the design of DER connected to an external power system via medium-voltage power lines, as well as in the selection of the cross-section of such power lines.
Keywords: distributed energy resources, power line cross section selection, connection of distributed energy resources to the power system, abruptly variable load, stability of parallel operation
Reliability Analysis of Power Distribution Networks Based on Contribution Factors
Klimkina D.I., Goenko R.Yu., Vanin A.S. (NRU “MPEI”)
Gabdushev D.M., Gusev S.V. (PJSC Rosseti Moscow Region)
Abstract. The paper analyzes the main reliability indicators of SAIDI and SAIFI distribution networks. For calculation and analysis of reliability of suburban and rural distribution networks, a model based on switchable sections is proposed. Expressions for determining the contribution of feeder reliability indicators to the reliability indicators of the network as a whole, and of switchable section reliability indicators to the feeder reliability indicators are proposed and justified. The proposed decomposition of reliability indicators makes it possible to identify and quantitatively characterize the problem areas of electric distribution networks. The developed approach is demonstrated on the example of a fragment of a real network.
Keywords: reliability index, SAIFI, SAIDI, contribution coefficients, distribution network, reliability analysis
POWER QUALITY
Development of the Calculation and Assessment System for Measures on Reduction of Losses and Energy Quality Provision Based on Smart Metering and Operating Mode Monitoring Data of 0,4-10 kV Networks
PJSC Rosseti Centre, JSC Rosseti R&D Center
Computational Study of Asymmetrical and Nonsinusoidal Electrical Modes at 110 kV Traction Substations of Taishet-Tulun Transit
Visyashchev A.N., Tiguntsev S.G., Fedosov D.S., Zubova E.V. (Irkutsk National Research Technical University)
Terskikh Yu.N., Visyashchev A.A. (Irkutsk Electric Grid Company, JSC)
Abstract. This article discusses the computational determination of power quality indicators at 110 kV traction substations of the Taishet-Tulun transit implemented according to the 27.5 kV scheme. A detailed description of the methodology for calculating steady-state asymmetrical non-sinusoidal modes in the computer software complex «Power Quality» is given. As initial data for the calculation, the passport data of electrical equipment and the results of measurements of mode parameters in 2017 were used. A series of experiments performed showed that at all transit substations, voltage asymmetry in the negative sequence and harmonic voltage levels exceed the standard limits of GOST 32144-2013 in both normal and maintenance circuits. The necessity of installing VAR compensators and balancing devices to reduce voltage asymmetry and increase the fundamental frequency voltage in repair modes is substantiated. The wave nature of the voltage harmonics distribution along power lines has been obtained, which must be taken into account when selecting and placing devices to reduce voltage higher harmonics.
Keywords: voltage unbalance, voltage waveform distortion, power quality, traction substation, mathematical model, equivalent circuit, higher harmonics
CHARGING INFRASTRUCTURE
The Use of Energy Storage Systems for Electric Vehicle Charging Stations in Conditions of Restrictions on Technological Connection
Voronin V.A., Nepsha F.S., Anushenko S.Yu. (T.F. Gorbachev Kuzbass State Technical University, Kemerovo)
Abstract. In this paper, an assessment of the feasibility of using energy storage systems for electric vehicle charging stations is carried out. A simulation model of a charging hub and an electric power storage system has been developed based on real data on the use of electric charging stations, which allows modeling the daily minute-by-minute profiles of electric consumption of charging ports, taking into account the stochastic nature of behavior and the model composition of the electric vehicle fleet. The study of the modes of operation of the charging hub when using an energy storage system in the mode of maximum power control and arbitrage of power prices was carried out. A financial and economic model of the charging hub has been developed and an analysis of the sensitivity of the value of net present value over a ten-year period from the value of capital investments has been carried out. Based on the simulation results, it was found that the parameters of the dynamic balancing system and the energy storage system for the charging hub are largely deter[1]mined by the expected number of charging sessions and the model composition of the electric vehicle fleet. The use of energy storage systems can increase the revenue of the charging hub, however, the profitability of this technical solution can only be achieved by reducing the capital costs of energy storage systems by 40-60%.
Keywords: simulation modeling, electric vehicles, electric charging stations, battery energy storage systems
OVERHEAD TRANSMISSION LINES
PO FORENERGO: True Import Substitution and Innovations
CABLE LINES
Definition of the Limited Load Operating Modes of Cable Lines Based on Temperature Monitoring Data
Titkov V.V., Chesnokov E.A., Kizevetter D.V., Voloshin K.V. (Peter the Great St.Petersburg Polytechnic University)
Bushanova V.V., Molchanov A.Yu. (PJSC Rosseti Lenenergo)
Abstract. This article describes the authors’ methodology of defining the limit permissible load currents of power cables equipped with the fiber-optic temperature sensor. To define the continuous and temporary permissible current loads of the cable, we use the results of synchronized cable current and temperature measurements during the test period within which the average daily temperature of the cable is constant. For this purpose the data on loads of parallel-laid cable lines (if any) as well as of thermal pipes that cross or go in parallel with the cable line under study is used.
Keywords: power cable, temperature monitoring, continuous permissible load, time-current characteristic, parallel-laid cable lines
DIAGNOSTICS AND MONITORING
Multijunction Solar Cells for Stand-Alone Monitoring and Diagnosis Systems of Electric Grids
Skolkovo Institute of Science and Technology, PJSC Rosseti Volga Region, OOO Sansens, OOO Volga
EQUIPMENT
On Assessment of the Technical Condition of Live Tank Covers for 110 kV and Higher
JSC Rosseti Tyumen branch – Surgut electric grids
Adjustable Three-Phase Rectifi er Devices with Input Power Factor Correction
Mytsyk G.S., Myo M.Th. (NRU “MPEI”)
Tyuryakhin E.O. (Avionica Joint Stock Company)
Abstract. In the presented work, in relation to rectifier devices (RD), options for solving one of the problems that constitute the current problem of energy saving are considered. Traditional RD solutions are a nonlinear load, which is characterized by distortions of the current consumed from the network, which adversely affect other consumers. In technical literature, this fact is defined as poor electromagnetic compatibility of such RDs. To solve this problem, at the end of the 80s of the last centuries, an additional device called an input power factor correction (IPFC) was proposed for single-phase power supply units. After that, the RD itself began to be designated as a RD with a IPFC (or simply RD+IPFC). Recently, this problem has begun to be solved in relation to three-phase RDs (T-RDs). The presented work is devoted to the study of the possibilities of another direction of RD synthesis with a IPFC in relation to this class of devices – T-RDs. The proposed solutions implement not a tracking (traditional) algorithm, but a software algorithm for controlling switching elements, which is simpler in technical implementation. In addition, the new solutions have the potential to increase the level of converted power. The validity of the design concept is confirmed by a series of numerical experiments performed on the basis of computer simulation modeling.
Keywords: three-phase transformerless and transformer-rectifier devices, input power factor corrector, multi-channel design, software control algorithm, filtering, computer modeling
EXHIBITIONS, CONFERENCES
Reliability of Power Systems: Continuous Development and Operation
Review of the 96th meeting of International scientific seminar named after Yu.N. Rudenko “Methodical issues of studying the large energy system reliability”
