Пропозиції щодо пошуку економічних місць розташування та величин потужності джерел розподіленої генерації в розподільних електричних мережах, які живляться від системного електропостачання

А. М. Скрипник, Д. П. Кожан

Анотація


SUGGESTIONS ON SEARCH OF ECONOMIC PLACES OF LOCATION AND THE MAGNITUDES OF POWER THE SOURCES OF DISTRIBUTED GENERATION IN DISTRIBUTION ELECTRIC NETWORKS, WHICH ARE POWERED BY THE SYSTEMIC ELECTRICITY SUPPLY

A.MSkrypnyck, D.P. Kozhan

 

Introduction. The introduction of SDG (such as solar and wind energy converters, hydroelectric power plants on small rivers, etc.) in distribution electric networks ensures the cleanliness of the environment, reduces both fuel and water resource costs, and energy losses in networks by approximating the manufacturers of electric energy to consumers. At that, there are problem issues associated with both the regime of voltage in the network with the SDG, and the impact of SDG on the properties of centralized systemic electricity supply.

Problematic is also the questions about determine the economic places of location of SDG in distribution networks and the values of their active and reactive capacities, taking into account the distribution between the supplying network of objects. To address these issues in this publication we propose an approach in two stages:

1) definition the economic places of location SDG;

2) determination of the values of active and reactive capacities of the SDG in the places of their economic location.

The purpose of the research – the development of simple and effective models search of economic places of location and the magnitudes of power of SDG in distribution electric networks, which are powered by the systemic electric supply.

Materials and methods of research. To determine the economic places of location of SDG in distribution electric networks, which are powered by the systemic electricity supply, a gradient method is used that implements specific transport costs for the transmission of active and reactive power to the elements of the electrical network.

Specific transport costs ∂π / ∂Pi and ∂π / ∂Qi are determined for all nodes of the electric network scheme on the basis of the results of calculations of the modes of its maximum or prospective node load.

The maximum values of the nodal specific transport costs ∂π / ∂Pi and ∂π / ∂Qi indicate the most economical locations of the sources of active and reactive power respectively.

In open-loop networks with voltage of 10 and 35 kV, which have several branches from node systemic power supply, the maximum values of nodal specific transport costs, and accordingly the most economical places for installation of power sources, are defined separately for each offshoot.

At that, all search active and reactive power are determined directly without additional their calculation after the end of the iterative process.

Experimental studies on the above-stated approach in two stages are performed on the example of a fragment of the scheme of an electrical network of 10 kV voltage with parameters of the plots and values of the nodal load.

Conclusions and perspectives.

1.  Using the method of specific transport costs provides the possibility of developing simple and effective models to determine economically sound locations SDG in distribution electric networks, which are powered by the systemic electric supply.

2. To determine the economically feasible capacity SDG with their location in economically sound areas it is proposed to use a modified Newton method with the definition of amendments to unknown at each step of the iterative process solution of the system of linearized equations using the least squares method.

3. A modified Newton method, which is the addition of the matrix of partial derivatives the derivatives ∂εiP / Pi; ∂εiP / Qi; ∂εiQ / Pi and ∂εiQ / Qi provides the ability to use nodal characteristics Pі, Qі, θі і Uі in various combinations search and known nodal values.

4. Experimental studies have shown, when determining capacity SDG in distribution networks 10 kV, the most appropriate is the equality of voltage of 10.5 kV in the places where electricity producers join, including the place of system power supply.

Research is being conducted on the use of specific transport charges on the reactive-power ∂π / ∂Qi and modified method of Newton for the choice of optimal places of location and the magnitude of sources of reactive-power for her indemnification in distributive electric networks.

It is planned to use the methodic with respect to the economic justification of the locations and magnitudes of the power SDG and their optimization in the distribution electrical networks when changing graphs for nodal the consumption.


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Посилання


Changes in the installed capacity of the UES of Ukraine. Available at : http://www.ukrenergo.energy.gov.ua/ukrenergo/control/uk/publish/article?art_id=149524&cat_id=35061_2014.

Kyryk, V. V., Hubatiuk, O. S. (2015). Sensornyi metod poshuku mistsia vstanovlennia dzherela rozpodilenoho heneruvannia [Sensory method of searching for the location of the source of distributed generation]. Visnyk of the Vinnytsia Polytechnic Institute, 6, 136–140.

Kozyrskyi, V. V., Hai, O. V., Bodunov, V. M. (2012). Rekomendatsii shchodo vyboru potuzhnosti dzherel rozpodilenoi heneratsii v rozpodilnykh elektrychnykh merezhakh silskykh rehioniv [Recommendations on the choice of power of distributed generation sources in distributive electric networks of rural regions]. Scientific visnyk of NUBiP of Ukraine. Series: Technique and Power Engineering of Agroindustrial Complex, 174 (2), 24–30.

Skrypnyk, A. M., Kozhan, D. P. (2016). Modeliuvannia optymalnykh mists roztashuvannia ta velychyny potuzhnosti dzherel rozpodilenoi heneratsii v rozpodilnykh elektrychnykh merezhakh napruhoiu 10 kV v umovakh yikh ekspluatatsii [Simulation of optimal do placements and the magnitude of power of sources distributed generation in distribution electric networks with voltage 10 kV in conditions their operation]. Power engineering and automatics, 4 (30), 185–193.

Skripnik, A. N., Kozhan, D. P., Kovaleva, V. V. (2015). Modifikatsiya metoda Nyutona i eye ispolzovaniye pri raschetakh rezhimov raspredelitelnykh elektricheskikh setey napryazheniyem do 110 kV [Modification of the method of Newton and its use in modes calculation electricity distribution networks with voltage up to 110 kV]. Innovations in agriculture, 4 (14), 14–20.

Bartolomey, P. I., Panikovskaya, T. Yu., Chechushkov, D. A. (2010). Analiz vliyaniya raspredelennoy generatsii na svoystva EES [Analysis distributed generation effect on the properties of EES]. Joint symposium within the framework of the APEC project. Energy ties between Russia and East Asia: Development Strategy in the XXI century. Irkutsk, 4–5.

Yandulskyi, O. S., Trunina, H. O. (2014). Vyznachennia zon efektyvnoho rehuliuvannia napruhy dzherelamy rozoseredzhenoi heneratsii z invertornym pryiednanniam u rozpodilnii elektrychnii merezhi [Determination of zones of effective regulation of voltage by sources of dispersed generation with inverter connection in the distribution electric network]. Scientific works of Vinnitsa National Technical University, 4.

Jegadeesan, M., Keerthana, V. (2014). Optimal Sizing and Placement of Distributed Generation in Radial Distribution Feeder Using Analytical Approach. International Journal of Innovative Research in Science. Engineering and Technology, 3, 358–364.


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