Wyniki wyszukiwania - BazTech

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Determination of pumped storage capacity combining the entropy weighting method and principal component analysis

Zhang Z., Cai X., Parkun D.

Journal of Power Technologies

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2014

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Vol. 94, nr 3

165--175

EN

The aim of the study is to evaluate methods for determining appropriate pumped storage capacities. This is especially relevant, since pumped storage units are, today, viewed as some of the best means of storing large amounts intermittently-produced power in order to meet peak demands on power supply grids. The determination of appropriate pumped storage capacity is a problem of integrated decision-making. The entropy weighting method and principal component analysis are combined to determine the optimum pumped storage capacity, taking into account several representative indices, whilst using the syntropy method to standardize the data indicators. The entropy weighting method is used to determine the weighting of the indicators, while principal component analysis offers reduction of the dimensions. The optimal solution is then determined by ranking the evaluation values for each design. This method can avoid subjectivity in the weighting assignment and simplifies the calculations to an evaluation problem which contains multiple evaluation indices. Using the principle of energy-saving scheduling, the peak-shaving method is applied to the dispatching over a typical daily load in order to verify the rationality of the calculated pumped storage capacity. The example analysis, here, shows that it is reasonable to determine the optimum pumped storage capacity by using this combination of the entropy weighting method and principal component analysis.

2

Optimization analysis for pumped energy storage systems in small isolated power systems

Poullikkas A.

Journal of Power Technologies

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2013

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Vol. 93, nr 2

78--89

EN

In this work, a technical and economic analysis concerning the integration of pumped energy storage plants in small island power systems and in particular in the Cyprus power system is carried out. For the simulation of the current and future Cyprus generation system, the WASP IV software package is employed, which is a specialized simulation software used widely for the selection of the optimum expansion planning of the generation system. The electricity unit cost of the generation system for various investigated scenarios is then calculated. The simulation results indicate that under certain parameters the use of pumped energy storage systems can be beneficial for the large scale integration of renewable energy sources.

3

Elektrownia Szczytowo-Pompowa Goldisthal w Niemczech

Chudy Ł.

Gospodarka Wodna

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2011

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Nr 8

329-331

PL

Uruchomiona w październiku 2004 r. Elektrownia Szczytowo-Pompowa Goldisthal (o mocy 1060 MW) jest największym projektem hydroenergetycznym w Niemczech i jednym z najnowocześniejszych w Europie. Unikatowość ESP Goldisthal, na skalę europejską, polega na zainstalowaniu w niej dwóch spośród czterech pom- poturbin Franęisa, sprzęgniętych z asynchronicznymi generatorami pracującymi ze zmienną prędkością. Takie rozwiązanie daje kilka korzyści: możliwość regulacji mocy podczas pracy pompowej, wzrost sprawności w warunkach częściowego obciążenia i dynamiczną kontrolę wytwarzanej mocy dla stabilizacji systemu energetycznego [1],

EN

The Goldisthal Pumped-Storage Plant (1060 MW) start up in October 2004 is the largest hydro-energy project in Germany and one of the most modern in Europe. The uniqueness of the Goldi- stahl power plant on the European acale is due to installation of two out of four Francis pump-turbines coupled with asynchronic generators working at variable speed. Such solution brings several benefits: possibility to regulate power during the pump work, increase of efficiency on conditions or partial load and dynamic control of produced power for energy system stabilisation.

4

Silnik indukcyjny pierścieniowy w napędzie odwracalnym, w elektrowni szczytowo-pompowej

Przybylski J.

Elektro Info

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2003

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nr 6

32--36

PL

Stosowanie maszyn elektrycznych w klasycznych elektrowniach do generowania energii elektrycznej polega na wykorzystaniu maszyny indukcyjnej pracującej w zakresie generatorowym. Jednak w specjalnych rozwiązaniach elektrowni, jakimi są hydroelektrownie szczytowo-pompowe, maszyna generująca energię elektryczną (generator) pracuje także w zakresie silnikowym.