2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)最新文献

{"title":"Development of a Methodology for the Management of Electric Distribution Grids","authors":"E. Voloshin, D. Degtyarev, A. V. Artemenko, D.V. Storozhuk, A. Sorokin, A.A. Titsky","doi":"10.1109/RPA57581.2022.9951093","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951093","url":null,"abstract":"During implementation of distributed generation in Western Europe and North America the following problems were identified: reduction of reliability of power supply to consumers, reduction of power quality due to harmonic distortions caused by the use of low-frequency inverters, management of microgrids during transition to isolated operation, related to the limited possibility to control distributed generation plants and the specificity of renewable energy sources. An effective solution to these problems is the creation of a distributed smart grid control system.This paper proposes an approach to create a decentralised control system with self-tuning, self-configuration and self-healing functions without the use of a single decision-making unit. The implementation of such a control system should lead to: to increase the reliability of power supply; improvement of economic performance of micro-energy systems; to increase the flexibility and ability to expand the system.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115627960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the Causes of Zonal Low Frequency Oscillation in the Electric Power Network","authors":"A. Ententeev, Tatiana G. Klimova, R. Maksimov, D. M. Serov, A. Guseynov, E.B. Asmykovich","doi":"10.1109/RPA57581.2022.9951106","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951106","url":null,"abstract":"At any disturbances in the electric energy system (EES), various types of low-frequency oscillations (LFO) are recorded at the observation points. In the oscillograms of grid frequency observed on the busbars of stations at the same type of disturbances, oscillations of at least two frequencies can be distinguished. Higher frequency oscillations are local oscillations, the parameters of these oscillations mainly depend on the parameters of the grid closest to the point of application of the disturbance. Fluctuations of a lower frequency are zonal oscillations; their parameters depend on the entire scheme of the EES. It is very important to determine the cause of the appearance of zonal oscillations, since they spread over a section of the power system. In the course of modelling in this work, one of the reasons for their appearance was identified.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125366623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the Influence of Non-Sinusoidal Voltage and Currents on Electricity Losses in a Power Transformer","authors":"P. Zvada, M. Ilinykh, R.A. Zvezdilin, Tuchina Daria","doi":"10.1109/RPA57581.2022.9951114","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951114","url":null,"abstract":"In distribution networks, power transformers take the brunt of the influence of non-sinusoidal currents and voltages and can be a source of high losses in this situation and an element that causes imbalance in the metering system. It is known that one of the popular methods for searching for sources of increased losses is the balance method using an electric energy metering system.The paper studies the influence of higher harmonics on the value of losses in a power transformer, uses a balance method to assess the total losses of electricity during the operation of transformers in non-sinusoidal conditions and allows us to evaluate the process of the impact of non-sinusoidal currents and voltages on the operation of the transformer and the formation of loss values depending on typical combinations of values given harmonic components of currents.A model of a network section was built in the PSCAD simulation environment, which makes it possible to assess the losses of electricity in a power transformer for various forms of the voltage curve and the harmonic composition of the load currents. A series of experiments were carried out to simulate situations of non-sinusoidality of voltages and currents of loads, the values of no-load losses were determined for different levels of non-sinusoidal of voltages and currents of the load and various values of the phases of higher harmonics. Experimental studies of the influence of the frequency and initial phase of higher harmonics of load currents on the value of transformer losses were carried out.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130171608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research of the Efficiency of Under-Frequency Load Shedding and Special Automatics Switching-off of Load in Case of Large Shortages of Active Power in Micro-Power Systems with MINI-HPPS","authors":"Voloshin Alexander, Bologova Valentina, Nozim Kholov, S. Hafizov, Yatimov Isramshoh","doi":"10.1109/RPA57581.2022.9951127","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951127","url":null,"abstract":"The occurrence of emergency power shortages in micro-power systems with mini-hydroelectric power plants (HPPs) during the transition from parallel operation with an electric power system to an autonomous mode is investigated. For a qualitative assessment and analysis of the properties of micro-power systems with mini-hydroelectric power plants, they differ in terms of power shortage in the Power Systems Computer Aided Design (PSCAD) software package (PC) developed a calculation model of a synchronous generator (SG) and special load automation (SAON). The simulation results show that in micro-power systems with mini-HPPs, with a large emergency power shortage, the efficiency of the under-frequency load shedding decreases, since the under-frequency load shedding does not provide the necessary and sufficient amount of electrical load to be turned off during the transient process. Therefore, it is proposed to jointly work with under-frequency load shedding (UFLS) and special automatics switching-off of load (SASL) to ensure the stability of the operation of micro-power systems with mini-HPPs in emergency modes and to ensure the continuity of power supply to consumers of the first category. However, after carrying out an economic calculation, it was found that the introduction of the existing system of UFLS and SASL in the analyzed micro-power system does not provide the required technical and economic efficiency. Therefore, it is necessary to refine this type of device, which combines the functions of UFLS and SASL, taking into account the characteristics of the power supply area in order to obtain an economically viable option for implementation.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130634759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of the Sources of Low-Frequency Oscillations in the United Power System of Russia in Real-Time","authors":"S. Piskunov, A. Mokeev, K. Butin, A. Popov, A. Rodionov, D. M. Dubinin","doi":"10.1109/RPA57581.2022.9951091","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951091","url":null,"abstract":"Low-Frequency Oscillation (LFO) monitoring is one of the main tasks of the dispatcher in most dispatch centers of large system operators. The task of LFO monitoring is complex and includes the identification of oscillation parameters, analysis of the power system oscillatory stability, verification of computational digital models of power systems based on modal characteristics, etc.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131361794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Synchrophasor Data Captured Under Faults on 500 kV Overhead Lines Through Available Transient Waveforms","authors":"I. Ivanov, Ya.A. Umnov","doi":"10.1109/RPA57581.2022.9951099","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951099","url":null,"abstract":"Fault location (FL) on high voltage transmission lines has been one of the extensively discussed topics in power system research. Accurate FL can reduce line outage time and, as a consequence, minimize damage to the power system and electric power consumers. Considerable advances in digital relaying and power system automation allow implementing more and more complex FL algorithms. Phasor measurement units (PMUs) were not meant to capture characteristics of electromagnetic transients such as those caused by a fault. However, quite a few publications have focused on synchrophasor-based fault location. Many advanced algorithms have been proposed but there seems to be a lack of real-field data to support conclusions drawn by the authors.This research is devoted to the analysis of real-world measurements captured by class M PMUs during single line-to-ground faults on extra-high voltage lines, as well as phasors computed by a real-time digital simulator and production-grade PMUs. The corresponding transient waveforms make it possible to assess whether or not a typical PMU would be capable of catching the “true” phasor magnitude given a very limited time until the fault clearance. The obtained results indicate that even class M PMUs (in compliance with IEC/IEEE 60255-118-1-2018) have enough time to compute a phasor magnitude with acceptable accuracy. The conducted analysis is deemed to promote the development of advanced synchrophasor-based algorithms for power system transient analysis including but not limited to transmission line FL.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133335468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a Tool for Automated Verification of a Synchronous Generator Models Together with Turbine and Excitation System Using PMU Technology","authors":"V. R. Rafikov, Y. Tepikin, F. N. Gaidamakin, D. Dubinin, I. Morozov","doi":"10.1109/RPA57581.2022.9950783","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9950783","url":null,"abstract":"Successful solution of problems aimed at improving the reliability of electric power systems operation and ensuring their stability depends on the correctness of electric power facilities models. An assessment of model response conformity to the actual transient in the power system can be given in the process of verifying this model using measurements of disturbance recorder or phasor measurement units. The development of the synchrophasor technology increases the observability of dynamic processes and opens up new prospects in the field of electric power systems and their elements models verification.The article is devoted to the development of a tool for automated verification of synchronous generator models together with a turbine, its control device and an excitation system. This article analyzes the existing approaches to verification and proposes a concept based on power system state replay using real synchrophasor data. The structure of the tool is described; the mathematical model of the synchronous generator is given. The article presents the results of testing the implemented tool on simulated data. Also, with the help of this tool, the turbogenerators verification installed at the power plants of the Russian Unified Energy System was carried out, through real synchrophasor data in transient.","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127813284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transition to Smart Grids of Power Supply with Renewable Energy Sources in the Republic of Crimea","authors":"B. Avdeev, A. Vyngra","doi":"10.1109/RPA57581.2022.9951112","DOIUrl":"https://doi.org/10.1109/RPA57581.2022.9951112","url":null,"abstract":"The paper made an extensive analysis of power generation in the territory of the Republic of Crimea. A special issue is the use of renewable energy sources (RES), in particular wind (WPP) and solar power plants (SPP). The current power generation capacities of the republic are determined and the power deficit is shown, which is currently covered by the electricity of the energy system of the Krasnodar Territory. One of the most important features of the development of the modern world is the increased attention of the world community to the problems of rationality and efficiency in the use of energy resources, the introduction of energy saving technologies and the search for renewable energy sources. In 2021, the countries of the Middle East and Europe increased the capacity of wind and solar power plants several times over. In India, installed renewable energy capacity has exceeded 100 GW. In June-July 2021, solar power generation in the European Union reached a record level and amounted to 39 TWh, an increase of 28%. For most European countries, renewable energy accounts for more than 15% of electricity generation in general. This is due to the fact that in the main markets, renewable, in particular solar electricity, is significantly cheaper than the energy of gas and diesel power plants.For Russia, the southern districts and coastal zones are effective geographical areas for the use of WPPs and SPPs. Thus, the Republic of Crimea is a geographically favorable place for the development of alternative energy.The technical and economic characteristics of SPP and WPP are determined, the current own wind and solar generation is considered in detail. The ways of development and permissible capacities of renewable energy sources in the Crimea are determined. According to the requirements for the systems of regulation, control and protection of renewable energy sources (RES) during their operation as part of the Unified Energy System of Russia, the use of alternative sources of electricity together with the main grid is permissible with their total capacity equal to 20% of the maximum load of the region. Therefore, the development and distribution of renewable energy in the Crimea has a huge potential. The applied systems for integrating RES into the overall energy system are considered, their shortcomings are identified.For the further development of RES in the Crimea, it is proposed to use a model of intelligent integration of SPPs and WPPs into the energy system of the peninsula using solid-state transformers. The use of power transformers for the transmission of electricity from RES to the network significantly reduces the flexibility of the system and eliminates the control of energy parameters. To increase the control capabilities of the output power to the network, as well as to reduce energy costs during voltage transformation, it is proposed to use solid-state transformers (SST) at the inverting stage. The use of SST changes the general princ","PeriodicalId":413852,"journal":{"name":"2022 5th International Youth Scientific and Technical Conference on Relay Protection and Automation (RPA)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127501880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}