22 февраля 2022
АНОНС «ЭЛЕКТРОЭНЕРГИЯ. Передача и распределение» № 1(70), январь-февраль 2022
8 статей в открытом доступеОформить подписку
To provide equal opportunities for all in fair share
Interview with Pavel Zaval’niy, Chairman of the Energy Committee of the State Duma
Energy supervision aimed for system reliability and security
Interview with Dmitriy Frolov, Deputy Head of the Federal Environmental, Industrial and Nuclear Supervision Service of Russia
New technologies for remote monitoring and energy efficiency of network equipment
Principles of creating a digital platform for managing the reliability of electrical distribution networks in modern operating conditions
Krupenev D.S., Piskunova V.M., Galfinger A.G. (ESI SB RAS, Irkutsk)
Abstract. The article discusses the issue of increasing the reliability of power supply in the least reliable element of the electric power system – the distribution network. The distribution network under the influence of modern trends in the energy sector (the concept of prosumer, the integration of distributed generation) is undergoing a number of significant changes that require a new approach to reliability analysis. In this regard, it is proposed to apply a digital platform for managing the reliability of distribution networks, the approaches to the creating of which are presented in this work. The main task of the platform is to collect, process and store the necessary information about power equipment and operating modes of distribution networks. The platform will also allow predicting the parameters of the power system, assessing its reliability and, based on all of the above, offers control actions.
Keywords: energy, distribution network, power supply, reliability, digital transformation, digital platform, prosumer
Preventive load management in 0.4 kV networks in order to prevent emergencies
Udintsev D.N. (NRU “MPEI”, Moscow), Milovanov P.K. (LLC “Proektnyj institut no. 2”), Zuev A.I. (LLC “ProektBaltEnergo”)
Abstract. An important component of the stable operation of any electric power system is maintaining a balance between the generation and consumption of electricity. Most of the applied approaches to maintaining the stability of the electric power system in case of power imbalances are implemented by disconnecting the load. In addition to the existing means of emergency automatics, the proposed method eliminates the complete shutdown of electricity consumers in the event of a power shortage in the system and will attempt to implement fair mechanisms for limiting consumption based on taking into account the requirements for the reliability of power supply and participation in the total maximum consumption.
Keywords: power system, load management, emergency situation, load graph
Increasing The Efficiency of Hourly Load Forecasting Using Machine Learning Techniques on The Example of The Irkutsk Energy State System. Part 2.
Tomin N.V., Kurbatsky V.G. (ESI SB RAS, Irkutsk) Kornilov V.N. (Branch of JSC “SO UES” “Regional dispatching office of the Energy System of the Irkutsk region”)
Abstract. Solving the problem of hourly load forecasting becomes much more complicated with the constant action of various “irregular” effects (meteorological factors, traction load, holidays, bad data, etc.), the influence of which in regional dispatching offices (branches of SO UES JSC) is trying to neutralize in fact, in manual mode, relying on the empirical experience of employees. Such approach often leads to an increase in the daily load forecast errors and, as a consequence, additional costs for SO UES JSC. The article proposes a methodology for increasing the efficiency of hourly load forecast based on machine learning models, which makes it possible to automate the problem of correcting models and increase the accuracy of the forecast, primarily under conditions of “irregular” effects. The efficiency of the proposed approach is demonstrated on the example of real data from the region of the Eastern Electric Networks of the Irkutsk power system. The forecast results based on machine learning models are compared with the data of the corporate software used by SO UES JSC.
Keywords: forecasting, power consumption, electric power system, machine learning, deep recurrent neural networks
Functionality review of intelligent power meters “MIRTEK” with a combined GSM-module with GPRS and NB-IoT support
MIRTEK Group of Companies
Laplace Transform To Assess Current Total Harmonic Distortions
Dvorkin D.V. (JSC “Scientific and Technical Center of Unified Power System Power system development”), Ivanchenko M.A. (JSC “TSA”)
Abstract. The Fourier-transform-based approach to assess the non-sinusoidal current (voltage) prevails in Russia and the world. This approach divides an initial periodical non-harmonic current (voltage) signal into a set of periodic harmonic signals of higher frequencies and a DC component. As a matter of applicability, some high-harmonic components (of the frequencies higher than the standardized one) should be neglected, and the others – compared with a fundamental frequency signal (50 or 60 Hz). This methodology has been being applied in the USSR since 1967; and a little earlier in Europe, Japan, and the USA. This claim that this method has proven well over time. The key problem of this approach is instrumental – a necessity to neglect some high harmonic components; and may significantly affect the methodical error in the calculation of the main normative factor – Total Harmonic Distortion. In this paper, the authors proposed an alternative approach based on the Laplace transform. It needs no neglect to be applied. The conducted experiments provide confidence in the adequacy of the method and demonstrate the actual level of possible methodical error of the Fourier-transform-based approach due to the neglection as mentioned above.
Keywords: power quality, non-sinusoidal current, Laplace transform, current high harmonics, capacitor bank
Method of Monitoring Fatigue Damage of Overhead Line Wire During Its Operation
Kul’kov V.G., Norov D.Sh. (Volzhsky Branch of NRU “MPEI”)
Abstract. Overhead transmission line wires are exposed to various harmful factors, among which wind loads play a significant role. Under their influence, vibrations and vibration of the wire occur. During operation, defects in the structure of the wire metal accumulate in the surface layer. The degree of fatigue damage development is determined by the thickness of such a layer. In order to monitor the condition of the wire, it is proposed to measure its surface conductivity at high frequencies. The problem of determining the penetration depth of the field in a two-layer surface structure depending on the frequency and magnitude of its conductivity is solved. The layer thickness is determined graphically. This technique can be used to determine the thickness of the modified layer that occurs during technological operations of surface treatment of metal parts.
Keywords: fatigue strength, electrical conductivity, surface effect, reliability of the overhead transmission line
Ensto complex technical support
More about application of cable products with regard to fire safety parameters
Kamenskiy M.K., Savin D.V. (JSC VNIIKP), Smelkov G.I., Ryabikov A.I. (FGBU VNIIPO EMERCOM of Russia)
Abstract. Every year electric cable lines and wirings are the most frequent cases in the fire statistics. Therefore, cable producers and chemical enterprises are working hard to improve fire safety of cables and materials for their production. The article considers the results of investigations carried out in JSC VNIIKP on searching the optimal theoretically grounded approach to selection of application areas of most widely used cable products depending on their version, type of the materials used and efficiency of fire-proof design solutions implemented.
Keywords: cable products, versions, PVC-based polymeric materials, polyolefin halogen-free compositions, fire safety parameters, testing results
Current searching tubes ProtektorFleks® OMP is a proven highly effective solution for fault location detection in cables
Double-layer cover of a power cable: what is the advantage?
LIFETIME WARRANTY – a life-lasting guarantee from the company Tavrida Electric
JSC OEK (United Energy Company) has completed the main scope of reconstruction works for Bittsa substation
Regarding layout solutions for 110-220 kV switchgears with 3D topology connection diagrams
Grinev N.V. (Branch of “Rosseti FGC UES” – MES of the Urals, Yekaterinburg)
Abstract. Layout solutions for 110-220 kV switchgears with 3D topology connection diagrams are considered in this article. It also provides the comparative analysis of typical layouts.
Keywords: electric installation, switchgear, electric connection diagram, construction and reconstruction
TRAINING OF PERSONNEL
To form continuous and customized pathway of development for a future specialist
Prospects For Improving Occupational Safety in The Context of Reforming Labor Legislation in Russia
Kondrateva O.E., Loktionov O.A., Baeva P.N., Dobrodeev S.N., Gitina M.A. (NRU “MPEI”)
Abstract. The article discusses the main changes made to the Labor Code of the Russian Federation as part of the implementation of the “regulatory guillotine” mechanism. The analysis of draft by-laws regulating the introduction of new principles of state policy in the field of labor protection in terms of occupational risk assessment and the formation of a labor protection management system was carried out. The prospects of improving the occupational safety culture at energy enterprises are assessed, taking into account foreign and Russian experience in the implementation of corporate programs to reduce injuries and strengthen the health of employees.
Keywords: occupational safety, safety culture, occupational injuries, corporate health programs, occupational risk
Electrical safety test site
PJSC Rosseti Moscow Region
Lessons learnt from accidents
Digital transformation of power grid facilities (foreign experience)
International Instritute of Energy Policy, MGIMO University