Wyniki 1-3 spośród 3 dla zapytania: authorDesc:"Ľubomír BEŇA"

Wind farms in the process of voltage regulation in the power system DOI:10.15199/48.2019.08.33

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Renewable energy sources are now considered to be the most prospective energy sector. Solar energy and its derivatives are a free and inexhaustible source of energy [1]. Thanks to the rapid development of technologies in the field of renewable energy, the efficiency of generating units increase year by year, while the investment cost decrease. Increasing the share of renewable energy sources in the energy systems of the Member States is now a priority in the European Union energy policy. Funds earmarked for this purpose are to accelerate the development of renewable energy sources and enable diversification of fuels and gradual independence from conventional fuels. The current climate package assumes an increase in renewable energy sources share in the European Union to 20% by 2020. In 2016, the share of renewable energy in final energy consumption was 17% for the European Union [2]. Another target will be to increase energy production in renewable energy sources to 27% in 2030 [3]. According to the data of the Polish Energy Regulatory Office [4], in the Polish national power system, the total installed capacity in renewable energy sources at 30.05.2018 amounted to 8 584,552 MW, and the power in installations using wind energy was 5 874,778, which is 68,43% of the total installed power in renewable energy. One can notice the slowdown in the development of wind energy in Poland as a result of the Wind Farm Investment Act [5,6]. In 2016, the installed capacity in wind sources was 5 807,416 MW, so within 2 years the power increased by only 67,362 MW. The high installed capacity in wind farms makes it possible to use them for the process of voltage regulation in the power system nodes. Thanks to the use of wind farms with large reactive power control options, the transmission system operator can use wind farm to maintain the required voltage level at the connection point [7]. The use of wind farms in the reactive power contro[...]

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[...]

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