Готові списки джерел за темами / KV electrical network

Добірка наукової літератури з теми "KV electrical network"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "KV electrical network"

Naumov, I. V., S. V. Podyachikh, D. A. Ivanov, A. N. Tretyakov, M. A. Yakupova, and E. S. Fedorinova. "The 0.38 kV electrical networks unbalancing operating modes optimization." IOP Conference Series: Earth and Environmental Science 990, no. 1 (February 1, 2022): 012069. http://dx.doi.org/10.1088/1755-1315/990/1/012069.

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Анотація:

Abstract The equipment 0.38 kV low-voltage electrical networks is not a satisfactory level. Such electric networks operating modes management is carrying out save energy measures and electricity supply improve efficiency in general largely allows. As a result, the electric energy supplied parameters obtaining actual nature information about to consumers through these electric networks is the developing the power transmission requirements measures basis comply. The article presents results current unbalancing modes objective studies in 0.38 kV an electrical network that feeds Irkutsk multi-storey residential building electric consumers. The analysis electric energy parameters, power quality indicators changes as well as electricity lo sses caused by the currents unbalance in the studied electric network are presented. The calculate parameters and using results of balancing device efficiency as well as its influence on the quality indicators studied and electrical energy loss in the studied electrical network are presented.

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Tavarov, Saidjon Sh, Aleksandr I. Sidorov, Rustam G. Valeev, and Ekatirina V. Zykina. "Estimation Method of the State of 6-10 kV Distribution Network." European Journal of Electrical Engineering 23, no. 2 (April 23, 2021): 95–101. http://dx.doi.org/10.18280/ejee.230202.

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The article analyzes the state of the elements of 6-10 kV distribution electrical networks in Dushanbe, showing the excess of reliability and efficiency indicators of the considered electrical networks from the permissible 10% values. For the first time, the factors influencing the reliability indicators of 6-10 kV electrical distribution network elements in Dushanbe were identified and a mathematical model of networks for determining the state of 6-10 kV electrical distribution network elements in Dushanbe was proposed. On the basis of them, an algorithm for monitoring the state of the elements of 6-10 kV electrical distribution networks in Dushanbe is proposed, which makes it possible to evaluate the efficiency of 6-10 kV distribution electrical networks in terms of undersupply of electricity - ΔW.

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Panfilov, Alexander, Alexander Vinogradov, Alina Vinogradova, Vadim Bolshev, Zumeira Shakurova, and Elena Zaugolnikova. "Challenges and methods of monitoring the occurrence of unsanctioned voltage in the power grid." E3S Web of Conferences 288 (2021): 01111. http://dx.doi.org/10.1051/e3sconf/202128801111.

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Анотація:

The review of sources dedicated to the issues of monitoring in electric networks made in the article showed that the works of many scientists are aimed at developing methods, technical means, systems for monitoring current and voltage in various operation modes of power grids. The main objectives of monitoring are identified, it is shown that monitoring of parameters in the network operation modes provides observability of the network, which, in turn, allows to make timely decisions about switching in the network, regulating the parameters of the network operation modes. The relevance of monitoring for detecting cases of unauthorized voltage in the 0.4 kV power networks is shown. Similar cases lead to the risk of electric shock to people, increasing the risk of operating electrical networks. Identification of the occurrence of unauthorized voltage in the 0.4 kV network provides ways to prevent its transformation at substations of 10/0. 4 kV to a voltage of 10 kV. Therefore, it is relevant to develop methods for detecting unauthorized voltage in the 0.4 kV electric system. The methodological principles and one of the developed methods for monitoring the occurrence of unauthorized voltage in power transmission lines of 0.4 kV and blocking the reverse transformation on substations 10/0.4 kV, as well as the device for its implementation, are shown.

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Vasiliev, N. V., D. A. Kartashev, and N. Yu Krishtopa. "Analysis of operating modes of three-phase distribution networks using their digital models of 0.4 kV." IOP Conference Series: Earth and Environmental Science 979, no. 1 (February 1, 2022): 012110. http://dx.doi.org/10.1088/1755-1315/979/1/012110.

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Abstract Today, the problem of the quality of electricity is of particular relevance, because it is one of the most important conditions for the economical and long-term operation of electrical equipment in industrial enterprises, as well as in housing and communal services. Analysis of existing methods, as well as other studies of the quality of electrical energy in 0.4 kV networks, shows the limitations of existing methods for assessing the quality of electricity and determining power losses in 0.4 kV networks. The total relative losses of electricity in the electric grids of Russia are several times higher than in the grids of other European, industrialized countries. Roughly the maximum relative technological losses of electricity in 0.4 kV networks should be no more than 8% in relation to the supply of electricity to the network. This article briefly outlines the methodology for constructing a digital model of a 0.4 kV network in asymmetric modes for the purpose of element-wise calculation of losses in all sections of the network and determining the quality of electricity at consumer connection points.

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Bolshev, V. E., A. V. Vinogradov, A. V. Vinogradova, A. V. Bukreev, and S. R. Khasanov. "Study of statistical data on the composition of electric distribution networks on the example of a Kaluga region district." E3S Web of Conferences 220 (2020): 01005. http://dx.doi.org/10.1051/e3sconf/202022001005.

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Sustainable operation of the power grid complex is impossible without reliable and high-quality operation of 10/0.4 kV electrical distribution networks, which are the final link in the system for providing consumers with electric energy and are in direct interaction with a specific consumer. The study of statistical information on the composition of distribution networks makes it possible to draw conclusions about electrical network state, to implement recommendations for their development and to compare distribution electrical networks in different regions. This information is especially relevant for analyzing the reliability of power supply to consumers connected to the considered electrical distribution networks. Such indicators of network structure as the length of electric transmission lines of different voltages and power transmission schemes are studied. It also analyzes the number of damages in networks, the causes of these damages, data on the time of planned and emergency outages. This paper considers the structure of 10/0.4 kV electrical distribution networks located on the territory of one of the districts of the Kaluga region. The sample for distribution networks was: 1190 overhead transmission lines and 536 transformer substations. Consumers in the district are 21671 subscribers of individuals and 1986 subscribers of legal entities, that is, a total of 23657 metering points. On the lines of 0.4 kV and 10 kV, the percentage of their isolated design was revealed. The share of single-transformer and two-transformer versions of transformer substations is analyzed.

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Gritsay, Alexander, Evgeny Chebanenko, Viktor Potapov, Elena Andreeva, Rustam Khamitov, and Igor Chervenchuk. "On the development of a software and hardware complex for modeling a power grid controller and microgeneration facilities based on renewable energy sources in LV 0,4 kV networks." Analysis and data processing systems, no. 1 (March 26, 2021): 61–72. http://dx.doi.org/10.17212/2782-2001-2021-1-61-72.

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The article discusses the issues of connecting microgeneration facilities based on renewable energy sources (RES) to electric networks of low voltage (LV) 0,4 kV. This method of connection will allow the use of microgeneration facilities as network sources of energy, and at the same time unused electrical energy generated by micro-generation facilities can be supplied to a low-voltage network of 0,4 kV. Methods of simulation modeling of the processes of electrical energy distribution in the power supply system with microgeneration objects are proposed; the requirements for the power grid controller used to ensure the connection of micro-generation facilities to the low voltage network are formulated. The problems arising in connection with this are analyzed and the ways of their solution are offered. The proposed methods for the development of software and hardware solutions using modern methods of simulation of electrical energy generation and distribution based on rapid prototyping in the Matlab Simulink environment make it possible to carry out field experiments in order to simulate the processes occurring in 0,4 kV low voltage electrical networks using microgeneration objects prosumers.

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SKRYPNYK, S., and A. SHEINA. "Short circuits currents comparison of 6 (10) kV and 20 kV." Journal of Electrical and power engineering 14, no. 1 (February 27, 2020): 21–26. http://dx.doi.org/10.31474/2074-2630-2020-1-21-26.

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Анотація:

Most failures in electrical installations are caused by short circuits (short circuits), which occur as a result of a failure in the electrical strength of the insulation of the conductive parts. A short circuit is an electrical connection of two points of an electric circuit with different values of potential, which is not provided by the design of the device, which interferes with its normal operation. Short circuits may result from a failure of the insulation of the current-carrying elements or the mechanical contact of the non- insulated elements. Also called a short circuit is a condition where the load resistance is less than the internal resistance of the power source. The reasons for such violations are various: aging of insulation, breakages of wires of overhead transmission lines, mechanical damages of isolation of cable lines at ground works, lightning strikes in the transmission line and others. Most often, short-circuits occur through transient resistance, such as through the resistance of an electric arc that occurs at the point of damage to the insulation. Sometimes there are metallic short circuits in which the resistance of the electric arc is very small. The study of short circuits in the power grid is a major step in the design of modern electrical networks. The research is conducted using computer software, first by modeling the system and then simulating errors. A malfunction usually leads to an increase in the current flowing in the lines, and failure to provide reliable protection can result in damage to the power unit. Thus, short-circuit calculations are the primary consideration when designing, upgrading, or expanding a power system. The three-phase short circuit is the least likely. However, in many cases, the three-phase short circuit is associated with the most severe consequences, as it causes the highest power imbalances on the shafts of the generators. The study of transients begins with the mode of three-phase closure due to its relative simplicity in comparison with other types of asymmetry. In most cases, the analysis and calculation of the transient regime of the electrical system involves the preparation of a calculated scheme of substitution, in which the parameters of its elements are determined in named or relative units. The electrical substitution circuitry is used to further study the transients in the power system. The definition of electrical and electromagnetic quantities in relative units is widely used in the theory of electric machines. This is because it significantly simplifies the theoretical calculations and gives the results a generalized view in the practical calculations of currents and residual voltages at the short circuit. By the relative value of any value is understood as its relation to another value of the same name, taken as the base. So, before presenting any quantities in relative units, we need to choose the basic units. In the electrical system with increased voltages, the overall load capacity of the network increases, which in turn makes it possible to supply high-quality electrical energy over a greater distance. In the process of comparing the type of transmission lines, it should be noted that the advantages of the cable transmission line. According to the results of the calculation of short-circuit currents, it can be concluded that in networks with a larger line cross-section and a higher voltage, the short-circuit currents are larger. Thus, during the transition of the electric networks to the higher voltage class of 20 kV, the currents of the KZ increased by 43% compared to the 6 kV electric network. This analysis shows that the importance of reliable power supply in the power supply system for high voltage classes must be high and have equipment to prevent emergencies. In the future, it is planned to develop a systematic calculation of short-circuit currents for a number of transmission lines and to conduct mathematical modeling in the system of applications for the study of transient processes at short circuits.

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Lvov, Mikhail Yu, and Dmitriy Yu Kamnev. "Application of the 20 kV Voltage Class in the Electric Power Supply Systems of Modern Megalopolises." Vestnik MEI 5, no. 5 (2020): 83–88. http://dx.doi.org/10.24160/1993-6982-2020-5-83-88.

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Megacities are characterized by a high level of energy consumption, a significant density of electrical loads and increased requirements for the reliability of power supply to consumers. Traditionally in the USSR and further in Russia, voltage classes of 6 and 10 kV are used for urban distribution electric networks. The increasing density of electric load and electricity consumption does not allow in extremely cramped conditions of developing cities to provide electricity through existing cable lines with a voltage of 6-10 kV due to their limited bandwidth and lack of reliability. The technical condition of the equipment and cable lines in the 6-10 kV supply networks has significant physical and moral deterioration. Existing networks have insufficient redundancy and have practically exhausted their ability to connect new consumers. These circumstances required a decision to switch to a voltage class of 20 kV, which is a strategic direction for the development of medium voltage electrical networks in Moscow. According to this decision, since the 2000s, electric networks with a voltage of 20 kV have been actively developing in Russia and in Moscow. This article analyzes the implemented approaches to the use of an electric network of 20 kV in megacities of different countries.

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Nassar, Ibrahim A., Mohammed Sh Seif, and Mahmoud M. ElAttar. "Improving the voltage quality of Abu Hummus network in Egypt." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 5 (October 1, 2020): 4458. http://dx.doi.org/10.11591/ijece.v10i5.pp4458-4468.

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In this paper the performance of the electrical network of Egypt is studied by considering a small part on the network (Abu Hummus city). The transmission network of Abu Hummus city was created for 66 kV, 11 kV, and 0.4 kV in the digital simulation and electrical network calculation (DIgSILENT power factory software) to study the voltage profiles. The load flow operational analysis was performed to obtain the voltage magnitudes at every bus bar. The voltage magnitudes in 11 kV and 0.4 kV networks were 10% to 15% less than the nominal value due to overloading off the transmission lines and the voltage magnitudes in 66 kV was within permissible limits. By using automatic tap-changing transformer or Static VAR System, the main idea of this paper is to obtain the voltage profiles at every bus bar to improve the voltage quality of the networks, so as to achieve better voltage profiles on the low voltage side without much effect on high voltage side under various operating conditions.

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Perepecheny, V. "Increasing the parameters of electrical distribution networks of town districts with low load density." Lighting engineering and power engineering 1, no. 57 (April 6, 2020): 28–32. http://dx.doi.org/10.33042/2079-424x-2020-1-57-28-32.

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This article presents the results of research on the parameters of electrical networks with a voltage of 6 (10) and 0.38 kV in relation to capital investments. The analysis of existing methods of estimation of parameters before designing for power supply networks in a small town with low load density is carried out. In modern conditions, in the distribution of electrical networks is of paramount importance the introduction of energy-saving schemes and parameters of power supply systems. One of the main ways to implement them is to increase the efficiency of 6-10 / 0.38 kV networks. In the actual design of electrical networks, economic proportionality can not always be maintained for various reasons: the impact of technical constraints, the discreteness of the rated power of transformers and cable crossing scales, a significant deviation of individual capacities of consumers from the average value. In that case there is an increase in the reduced costs. A methodology for determining the optimal power of transformer substations and optimal sections of 0.38 kV power transmission lines is proposed, taking into account the probable nature of the applied load. When assembling the power supply circuit for the optimal form of parameters, voltage, principles of voltage regulation and reactive power compensation. Decisions of this kind are substantiated by technical and economic comparisons of a series of technically acceptable variants of power supply networks. An important measure that facilitates the selection of the most economical option is the assessment of the proposed project, which relates to the selection of the optimal capacity of transformer substation (TS) networks using calculation formulas. The aim of the research was to improve the existing methods on the basis of separate accounting of the reliability coefficient of 0.38 kV and 6-10 kV network. Key words - electric power supply network, network parameters, transformer substation, load density, line wire section, specific load, unit costs, optimum parameter, distribution networks, electric energy.

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Більше джерел

Дисертації з теми "KV electrical network"

Hampton, Brent Gary. "Study and implementation of load monitoring on an 11 kV underground cable distribution network." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/21865.

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Анотація:

Operating and Planning staff of an electricitY supply utility have expressed the opinion that a load monitoring system needed to be installed at protected substations forming part of an 11 kV underground cable reticulation network. Load information was currently only available from feeders connected to the 132/11 kV stepdown substations which provide infeeds to the system. The staff felt that the availability of feeder load information from the protected substation level of the 11 kV ring network would assist in more efficient system planning and more accurate system operation. This request for additional load data constituted the main motivation for the project described in this report. The two main objectives of the project can thus be stated as follows: (i) To prove conclusively that there were benefits to be derived from implementing load monitoring at protected susbstations on the 11 kV reticulation network. (ii) To implement a suitable load monitoring system if the study resulting from (i) proved this was necessary.

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Mišinger, Ondřej. "Návrh úprav a konfigurace sítě 22 kV po instalaci transformace 110/22 kV ve spínací stanici Brno-sever." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220170.

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Анотація:

The theoretical part of this thesis deals with distribution networks in terms of distribution according to different criteria, describes the main elements of electric distribution networks and their qualities. The following describes the methods of calculating the steady state of electrical networks. These methods are nowadays used as basics for computer programs. In the penultimate chapter of the theoretical part are summarized the principles for the development of present networks and construction of new electrical networks. The aim of practical part of the thesis is to assess the current condition of the network 22 kV in the city of Brno and assess the condition after installation of 110/22 kV transformation in Brno-Sever switching substation. After evaluating the results of steady state electrical network and identifying certain problems is the following aim a proposal of solving problems that emerged in the network. The result should be operational, functional and reliable electric distribution network. This thesis used to calculate the steady state electrical networks by software PAS DAISY Off-Line Bizon V4.

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Macháč, Petr. "Výpočet ustáleného chodu sítě 110 kV." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220676.

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This thesis deals with load flow calculation of electrical network 110 kV before and after the connection to the 70MW gas supply and the 58MW steam and gas supply. This grid can be powered from two 400/110kV substations, namely Sokolnice and Otrokovice. The load flow calculation is realized for the power supply either from Otrokovice or Sokolnice. Furthermore, the calculation of the uni-phase and three phase short circuits in the substations of 110kV network is realized in this thesis. The result of the thesis is the assessment of the voltage ratio in the network, current load of the power line and short circuit resistance of the substations.

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Fojtík, Martin. "Návrh rekonstrukce distribuční sítě 0,4 kV E.ON v zadané oblasti." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219420.

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Анотація:

This Master’s thesis deals with the problem of distribution electrical network with a focus on solving the steady operation of the electrical distribution network for E.ON Brno - Lisen. The calculation is made by using BIZON PAS Off-Line. The first part of thesis is specialized on the distribution of individual LV and MV networks.The second part of thesis is specialized on the general calculation of the steady operation distribution network and describe criteria for the design and evaluation of this network. In the practical part is calculate existing network in selected area in which is located 53 distribution transformers. In the final part is evaluate the status of existing network and perform design optimization and assessment of this network.

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Jandora, Jiří. "Ustálený chod a zkratové poměry v síti 110 kV E.ON napájené z rozvodny 110 kV Sokolnice v roce 2011." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219017.

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Анотація:

While changing the connection of the power transformators we have to find out if the powered distribution network can accept this change and if it will fulfil the set conditions. Important is to keep the range of permitted voltage on separate distribution points of this network and to find out proportions on separate circuits. This is connected with a circuit load which cannot exceed its limit (transmission capacity). The network is checked against outages of separate circuits (N-1) and we try to find out if other circuits are not overloaded during the transmission of the outaged circuit’s power. We can also suggest various other possible outages. It is also important to find out whether separate distribution points agree with their short-circuit capabilities. Overall we investigate advantages of this circuit. The theoretical part describes the means of calculation of the network functioning and short-circuit conditions. All the calculated results (dispatcher control system Sinaut Spectrum) for the given circuits of power transformators are processed and evaluated in the practical part of the thesis.

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Chromík, Aleš. "Vyvedení výkonu z rozvodny 110/22 kV Moravany u Brna." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220293.

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Анотація:

The aim of this Master’s thesis is the design and reconstruction of the high voltage distribution network for the company E. ON with focus on calculation of the stabilized operation and on the planning of new cable taps from the transformer substation Moravany u Brna. The first part of the theoretical analysis of the work deals with the inclusion of the distribution network into the power system and with principles of development and construction of high voltage networks. The second part includes a general calculation of stabilized operation of the power distribution network and a familiarization with the program PAS Off - Line Bison 4.0. The practical part of the thesis is focused on the calculation of the stabilized operation at the current state of transformer substation Moravany u Brna using the PAS Off - Line Bizon 4.0 V programme. This part also contains the design of six new cable lines which are needed to strengthen the power distribution in the southern part of the city Brno. The closing part of this chapter constitutes of a outdoor and indoor cable line renovation. These cables are connected to the transformer substation Moravany u Brna and a calculation of stabilized operation is also included in this part.

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Kostkan, Petr. "Analýza paralelního provozu uzlových oblastí 110 kV TR Krasíkov a TR Neznášov." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-385310.

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Currently, the nodal areas of Neznášov substation and Krasíkov substation, which belong to ČEZd distribution network 110 kV – East, are operand as separate units. In the defined setting, each nodal area comprises of two 400/110 kV transformers. In the case of failure of the transformer T401 or T402, the criterion N-1 for twenty percent of the rated output is not met. Such problem can be solved by parallel operation of nodal areas of Neznášov substation and Krasíkov substation. The principal as well as practical aim of this thesis is to interconnect the bridge operated connection in separated areas into parallel/loop operation of nodal areas (supplied by 400/110 kV transformers). Computing software is used to calculate the steady state and short-circuit conditions in the distribution network 110 kV for separate and parallel operation of mentioned nodal areas. Power flow analysis is aimed at assessment and evaluation of voltage conditions, transformers loading (400/110 kV and 110/vn) as well as 110 kV lines loading. Obtained short-circuit indices is used to examine short-circuit, withstand capability of the 110 kV substation. Finally, benefits as well as drawbacks of the separate and parallel operation are compared and evaluated. If necessary, the technical arrangements are proposed/designed in order to allow parallel operation of nodal areas Neznášov substation and Krasíkov substation.

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Левчук, Владислав Вікторович. "Режими нейтралі електричної мережі номінальної напруги 110 кВ". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/44200.

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Анотація:

Дипломний проєкт складається із пояснювальної записки та графічної частини. Пояснювальну записку виконано на 98 сторінках формату А4, вона містить 25 рисунків, 45 таблиць та 8 посилань на джерела інформації. Графічну частину складають три аркуші (формату А1) креслень. У першому розділі синтезовано п’ять варіантів конфігурації електричної мережі номінальної напруги 110 кВ та внаслідок порівняння техніко-економічних показників обрано оптимальний. Вибрано трансформатори на підстанціях та перерізи дротів ліній електропередачі. Розраховано режими електричної мережі – максимальних навантажень та післяаварійний. Вибрано регулювальні відгалуження РПН та ПБЗ силових трансформаторів. У другому розділі виконано аналіз режимів нейтралі електричних мереж номінальної напруги 110 кВ.
The diploma project consists of an explanatory note and a graphic part. The explanatory note is made on 98 pages (A4 format), it contains 25 pictures, 45 tables and 8 references. The graphic part consists of three sheets (A1 format) of drawings. The aim of the diploma project is the development of an electrical network of nominal voltage 110 kV and analysis of its neutral modes. In the first section, five variants of the configuration of the electric network of nominal voltage of 110 kV are synthesized and as a result of comparison of technical and economic indicators the optimal one is chosen. Transformers at substations and wires sections of power lines are selected. The modes of the electric network are calculated - maximum loads and post-accident. The control branches of on-load tap-changers and off-load tap-changers of power transformers are selected. In the second section the analysis of the modes of neutral of electric networks of nominal voltage of 110 kV is performed.

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Komárek, Filip. "Návrh rekonstrukce stávající vstupní rozvodny a kabelové sítě 22 kV v areálu fakultní nemocnice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377072.

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This master's thesis deals with the area hospital distribution networkand one of the hospital's entry substation. The first part of this master's thesis deals with the project of the new cable network, her gradual revival without any power outages at the collection points. Futher, in this thesis is project of temporary transformer station for supplying power during the reconstruction of the HV switchboard. Subsequently, in this thesis is project of the new HV switchboard in one of the entry substation. new HV switchgear and a new HV substation were projected. Futher, in this thesis is proposed compensation of the whole area, including the HV network.

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Pantshwa, Athini. "Analysis of the reliability for the 132/66/22 KV distribution network within ESKOM’s Eastern Cape operating unit." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/19750.

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A stable and reliable electrical power supply system is an inevitable pre-requisite for the technological and economic growth of any nation. Due to this, utilities must strive and ensure that the customer’s reliability requirements are met and that the regulators requirements are satisfied at the lowest possible cost. It is known fact around the world that 90% of the customer service interruptions are caused due to failure in distribution system. Therefore, it is worth considering reliability assessments as it provides an opportunity to incorporate the cost or losses incurred by the utilities customer as a result of power failure. This must be considered in the planning and operating practices. The system modelling and simulation study is carried out on one of the district’s distribution system which consists of 132 kV, 66 kV and 22 kV network in Aliwal North Sector ECOU. The reliability assessment is done on the 22, 66 and 132 kV system to assess the performance of the present system and also predictive reliability analysis for the future system considering load growth and system expansion. The alternative which gives low SAIDI, SAIFI and minimum breakeven costs is being assessed and considered. The reliability of 132 kV system could be further improved by constructing a new 132 kV line from a different source of supply and connecting with line coming from another district (reserve) at reasonable break even cost. The decision base could be further improved by having Aliwal North Sector context interruption cost. However, the historical data which may be used in Aliwal North Sector to acquire interruption costs from the customers are being proposed. The focus should be on improving the power quality on constrained networks first, then the reliability. Therefore for the Aliwal North power system network it is imperative that Eskom invest on the reliability of this network. This dissertation also analysed load reflected economic benefit versus performance expectations that should be optimized through achieving a balance between network performance (SAIDI) improvement, and total life cycle cost (to Eskom as well as the economy). Reliability analysis conducted in this dissertation used Aliwal North power system network as a case study; the results proved that the system is vulnerable to faults, planned and unplanned outages. Reliability evaluation studies were conducted on the system using DigSilent software in conjunction with FME. These two models gave accurate results with acceptable variance in most indices except for the ENS where the variance was quite significant. It can be concluded that DigSilent results are the most accurate results in all three reliability evaluation scenarios for the Aliwal North Power System, best interpretation being that of DigSilent.

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Книги з теми "KV electrical network"

Rybakov, L. M. Metody i sredstva obespechenii︠a︡ rabotosposobnosti ėlektricheskikh raspredelitelʹnykh seteĭ 10 kV: Nauchnoe izdanie. Moskva: Ėnergoatomizdat, 2004.

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Marzecki, Jerzy. Metody badania rozwoju i wyznaczania optymalnego rozmieszczenia stacji transformatorowo-rozdzielczych 110 kV/SN w aglomeracji miejskiej. Warszawa: Oficyna Wydawnicza Politechniki Warszawskiej, 1995.

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Частини книг з теми "KV electrical network"

Qi, Chaoliang, Tianji He, Wentao Guo, Fenglan Tian, Chao Wang, Dongmei Zhong, Xupeng Wang, Jian Hao, and Xiping Jiang. "Vibration Fault Diagnosis of 220 kV GIS Equipment Based on Neural Network." In Lecture Notes in Electrical Engineering, 475–82. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3250-4_59.

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Majidi, M., H. Javadi, and M. Oskuoee. "Ferroresonance Evaluation at Boushehr 230/400 kV GIS Substation of Iran’s Power Network." In Lecture Notes in Electrical Engineering, 471–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21747-0_59.

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Su, Shan, and Fuzhong Wang. "Research on the Line Fault Branch Location Method of 10 kV Village Distributed Network." In Electrical, Information Engineering and Mechatronics 2011, 1699–705. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2467-2_202.

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Shen, Yan-jun, and Jin-liang Jiang. "Analysis and Application on Reactive Power Compensation Online Monitoring System of 10 kV Power Distribution Network." In Lecture Notes in Electrical Engineering, 867–74. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01273-5_97.

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Badache, Bahriya, Hocine Labar, and Mounia Samira Kelaiaia. "Study to Improve the Technical Parameters for the Optimising the Injection of the Photovoltaic Energy into an Electrical Network via a Line 30 KV." In Lecture Notes in Electrical Engineering, 565–78. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6403-1_38.

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Tavarov, S. S., and A. I. Sidorov. "Power Consumption Modeling in Urban Electric Networks of 0.4–10 kV of the Republic of Tajikistan." In Lecture Notes in Electrical Engineering, 866–76. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71119-1_84.

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Konstantinova, Yuliya, Valerij Li, and Andrey Konstantinov. "Simulation of Devices for Voltage Regulation in 25 kV AC Electric Traction Network." In VIII International Scientific Siberian Transport Forum, 15–24. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37916-2_2.

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Vinogradov, Alexander, Vadim Bolshev, Alina Vinogradova, Tatyana Kudinova, Maksim Borodin, Anastasya Selesneva, and Nikolay Sorokin. "А System for Monitoring the Number and Duration of Power Outages and Power Quality in 0.38 kV Electrical Networks." In Intelligent Computing & Optimization, 1–10. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00979-3_1.

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Kachanov, Alexander, Vadim Chernyshov, Artem Revkov, Maxim Borodin, and Oleg Vladimirov. "Predicting Single-Phase Damages in 10 kV Electric Networks Taking into Account the Seasonal Influence of Weather Factors." In Lecture Notes in Civil Engineering, 310–20. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67654-4_34.

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Vinogradov, Alexander, Vadim Bolshev, Alina Vinogradova, Maxim Borodin, Alexey Bukreev, and Igor Golikov. "Mobile Measuring Complex for Conducting an Electric Network Survey." In Advances in Environmental Engineering and Green Technologies, 243–67. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9420-8.ch010.

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An energy audit of the electrical network is required in the process of constructing new electrical networks as well as in justifying the reconstruction need of existing ones. In this chapter, the structure of a mobile measuring complex has been developed to conduct an electrical network survey without disconnecting consumers. The complex can be used to inspect 0.4 kV electrical networks and microgrids of the same voltage class and allows data collection on voltage losses and electric power losses in network elements such as a power lines (electric transmission line), and power transformers. The energy audit is conducted without disconnecting consumers in order to avoid an undersupply of electricity as well as to determine the real operating modes of power networks. Ultimately, the use of the developed measuring complex will increase the reliability of the power supply to consumers and ensure the required quality of the electricity supplied to them.

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Тези доповідей конференцій з теми "KV electrical network"

Ban˜o´ Azco´n, Alberto, and Jose´ Mollera Barriga. "Electrical Network Modeling and Electrical Transfer Simulation of C.N. Asco´ I and C.N. Asco´ II, to Obtain Voltage and Frequency Limit Values Allowing the Electrical Transfer From the Main Generator to the External 110 kV Power Grid." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75546.

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Broadly speaking, a simple electrical diagram of Asco´ I and Asco´ II power nuclear plants could be two power supply bus bars for general equipment classified No-1E, three power supply bus bars class No-1E for the Reactor Coolant Pumps (RCP) and two more bus bars classified 1E for safety related equipment. In normal operating mode, all the five power supply bus bars class No-1E are connected to the main generator (GP1) through two unit transformers (TAG1/2), while the two class 1E power supply bus bars are always connected to an external 110 kV power grid through two auxiliary transformer (TAA1/2). The main generator supplies power to an external 400 kV grid through the main transformer (TP1). The main circuit breaker is placed between the high voltage side of the main transformer and the 400 kV grid. With this configuration, the appearance of an abnormal condition that originates the trip of the main generator and the opening of the main circuit breaker from the external network, involves an electric transfer of the supply bus bars connected to the turbo generator to the external 110 kV power grid. The electric transfer to the external 110 kV power grid will be only possible if the frequency and voltage values are within the allowed range allowed by the grid’s protective relays. Two kinds of electrical transfers are possible: fast transfers and slow transfers. It will be necessary then to evaluate the limit values of voltage and frequency of the power grid that makes the electrical transfer possible in each case. In order to obtain the limit values previously mentioned, the electric system of the plant has been modeled. Different scenarios have been analyzed, taking into account the dynamic behavior of the system components and the delay of the protective relays actuation, verifying the electrical transfer for those situations. This analysis will give enough information to take the correct decisions for future design modifications, and it will assure that the electrical transfer will be done always with success.

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BEDOUI, Samir, and Abdelhafid BAYADI. "Insulation Coordination Study of 400 kV High Voltage Substation." In 2019 Algerian Large Electrical Network Conference (CAGRE). IEEE, 2019. http://dx.doi.org/10.1109/cagre.2019.8713176.

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Zeggai, Amine, and Farid Benhamida. "Power flow and Short circuit of 220 kV Substation using ETAP." In 2019 Algerian Large Electrical Network Conference (CAGRE). IEEE, 2019. http://dx.doi.org/10.1109/cagre.2019.8713172.

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Барышев, Петр Михайлович. "RELIABILITY OF DISTRIBUTION ELECTRICAL GRIDS VOLTAGE 6-10 kV." In Сборник избранных статей по материалам научных конференций ГНИИ "Нацразвитие" (Санкт-Петербург, Октябрь 2021). Crossref, 2021. http://dx.doi.org/10.37539/oct299.2021.39.57.002.

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В статье дана характеристика надежности распределительных электрических сетей. Приведена классификация и статистические данные технического состояния линий электропередачи напряжением 6-10 кВ. Проанализированы причины низкого уровня надежности сетей. The article describes the characteristics of the reliability of electrical distribution grids. The classification and statistical data of the technical condition of power transmission lines with a voltage of 6-10 kV are given. The reasons for the low level of network reliability are analyzed.

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Fati, Ovidiu, Constantin Barbulescu, Stefan Kilyeni, and Andrei Ceclan. "Distribution network technical losses evaluation. Case study for a real 110 kV electrical network." In MELECON 2014 - 2014 17th IEEE Mediterranean Electrotechnical Conference. IEEE, 2014. http://dx.doi.org/10.1109/melcon.2014.6820535.

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Lackovic, Velimir, and Mohammed Kamal. "Introduction of 400 kV voltage level in bahrain transmission network." In 2013 IV International Conference on Power Engineering, Energy and Electrical Drives (POWERENG). IEEE, 2013. http://dx.doi.org/10.1109/powereng.2013.6635608.

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Guentri, Hocine, Fatiha Lakdja, and Aissa Assas. "The interest of the new 400 kV lines and power plants for the southwest of Algeria." In 2019 Algerian Large Electrical Network Conference (CAGRE). IEEE, 2019. http://dx.doi.org/10.1109/cagre.2019.8713295.

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Blajszczak, G. "Resistive voltage divider for higher harmonics measurement in 400 kV network." In 2011 11th International Conference on Electrical Power Quality and Utilisation - (EPQU). IEEE, 2011. http://dx.doi.org/10.1109/epqu.2011.6128953.

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Rezaei, Salman. "Impact of Ferroresonance on protective relays in Manitoba Hydro 230 kV electrical network." In 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC). IEEE, 2015. http://dx.doi.org/10.1109/eeeic.2015.7165427.

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Tsyganenko, B., and V. Kyryk. "Fuzzy model of transfer criteria for network distribution to 20 kV voltage." In 2017 IEEE First Ukraine Conference on Electrical and Computer Engineering (UKRCON). IEEE, 2017. http://dx.doi.org/10.1109/ukrcon.2017.8100503.

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