Wyniki 1-4 spośród 4 dla zapytania: authorDesc:"Michal KOLCUN"

Use of PST in transmission system of the Slovak Republic

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The article deals with possibilities of phase shifting transformer to power flows control in transmission system. The main goal of the paper is to show results of the influence of the PST on power flows in the transmission system of the Slovak Republic. Streszczenie. Artykuł omawia możliwości zastosowania transformatora PST do sterowania przepływami mocy w systemie przesyłowym. Głównym celem artykułu jest zaprezentowanie rezultatów wpływu transformatora PST na przepływy mocy w systemie przesyłowym Słowacji. (Zastosowanie transformatora PST w systemie przesyłowym Słowacji) Keywords: power flows, transmission system, phase shifting transformer Słowa kluczowe: przepływy mocy, system przesyłowy, transformator PST Introduction Transmission system of the Slovak Republic is a part of European network of transmission system operators for electricity (ENTSO-E). The operation and dispatch control of electric power systems requires resources for power flow control in networks. Due to the limitation of the paper, the paper shows only results of the simulations of the influence of the PST on the transmission system and very simple and basic principle of the PST. PST The main goal of the PST is to divide and control power among parallel transmission lines. Power, due to regulation by PST, is put to other lines and vice versa, the power is withdrawn from other lines, according to dispatcher and business needs in given area. The principle of the PST is based on use of angle regulation of transformer ratio. PST is composed of series and regulation unit. Winding of the serial unit is placed directly into line (e.g. 400 kV), in which the phase angle is regulated. It means that the resulting voltage is composed of primary voltage and phase shifted regulation (additional) voltage. Regulating transformer with tap changer is supplied from serial unit. (Fig. 1) Fig. 1 Simple PST drawing Fig. 2 Network with two parallel lines The active [...]

The solution of optimisation problems in the operation control of the electric power system using SOMA algorithm

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Deregulation and opening of the market with electric energy increases the interest of all subjects involved in the market, thus also of the operators of the electric power system (EPS), in the highest efficacy of their activities. The article presents the mathematical formulation and demonstrations of the solution to the problem of Economic dispatching control of power plants and the problem of [...]

Use of TCSC for Active Power Flow Control in the Electric Power System

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The article deals with possibilities of the thyristor controlled series capacitor (TCSC) to control power flows in interconnected electrical power systems. The main goal is to describe the working principle of TCSC and its possible use in the transmission system (TS) and advantages and disadvantages of using of such equipment in the electric power system. Streszczenie. Artykuł dotyczy możliwości sterowanych tyrystorowo układów kompensacji szeregowej (TCSC) w kontrolowaniu przepływu mocy między połączonymi systemami elektroenergetycznymi. Głównym celem jest opis zasad działania układów TCSC, możliwości ich wykorzystania w systemie przesyłowym (TS), oraz wad i zalet użytkowania takiego sprzętu w systemie elektroenergetycznym. (Możliwości sterowanych tyrystorowo układów kompensacji szeregowej w kontrolowaniu przepływu mocy) Keywords: TCSC, EPS, power flow Słowa kluczowe: TCSC, EPS, przepływ mocy Introduction In some countries the transit of big amount of electricity via long transmission lines is required as well as interconnection of power systems. This cause, that some lines are extremely overloaded, it causes occurrence of faults and voltage non-stability. The result is decrease of reliability and quality of supplied energy. Increase of transmission capacities of lines, resp. buildup of new lines is time and money consuming process connected with environmental and legislative restrictions. Due to increasing requirements on transit, the contemporary used form of increase of transmission capacity is non-sufficient. While handling with electricity in liberalised market, the physical rules of power flows are not fully respected and differences between planned and real physical power flows occur. This will cause overloading of international, as well as national lines and limitation of transmission capacity used for another purpose. In so overloaded system can occur dangerous situations and long-lasting outages. In order to ensure re[...]

Modelling microgrid as the basis for creating a smart grid model DOI:10.15199/48.2019.08.11

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In these days "Smart" is as a very popular term. It usually refers to different products with an increasing degree of computing power. Smart products such as smart phone, smart TV or other smart electronics with a variety of features and applications are now very popular. Electricity is currently a strategic "raw material" and its importance in the future years is clearly growing. For this reason, increasing emphasis is placed on the stability, safety and security of the electricity supply to end customers. Therefore, the computerization is increasingly being introduced into the electricity system during the time. Very popular is also the new term "Smart Grid". Despite the high popularity of this term, it is not always clear what is meant by it. Smart Grid is often referred to as the network of the future, a network capable of providing a high proportion of distributed production. During the time Smart Grid has almost attracted the attribute of a magic wand able to solve all the problems associated with renewable energy sources connected to the distribution network while reducing the final price of electricity for customers. Among the many definitions available, Fereidon P. Sioshansi's statement is the most interesting and he interprets the term Smart Grid as follows: "Smart Grid is the best thing we can, but we do not know what it is." The many of projects, articles and publications focus on theme of Smart Grid, as well as foreign and domestic conferences. Despite the great popularity, there is a wide inconsistency in the definition of this term. Nevertheless, Smart Grid is often referred also to as the network capable of using more renewable energy sources and distributed production than the current network. Comprehension of the current Smart Grid network is rather difficult and from costs perspective expensive. It is a long-term process that binds capital over many years. Therefore, it requires a strong commitment[...]

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