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Informatyka – niezbędny element funkcjonowania nowego systemu energetycznego

100%

Świrski K.

tom Nr 2

111--114

Artykuł przedstawia perspektywy wdrożenia nowej europejskiej wizji systemu energetycznego wykorzystują-cego źródła odnawialne i generację rozproszoną, połączoną nową inteligentną siecią i skierowaną na obniżenie emisji CO2. Zostały poruszone problemy techniczne jakie mogą pojawić się przy budowie takiego systemu i obszary, gdzie niezbędna jest kluczowa rola systemów informatycznych, żeby w ogóle przystąpić do praktycznej realizacji tej wizji.

In this paper the perspective of the new European electric energy system view has been presented. Mentioned system is based on renewable energy sources as well as a distributed generation that is combined by the new intelligent network in order to reduce CO2 emissions. Moreover the technical problems that might arise during system creation have been described. The most important issue of this paper is the key role of information systems that are essential for such changes to be implemented.

Power Plant Performance Monitoring Using Statistical Methodology Approach

100%

Świrski K.

tom Vol. 91, nr 2

63-76

The paper sets out problems experienced in current power plant performance calculation methodology. With changes in the electricity market and the increased role of computer control and diagnostic system, the previous methodology is fast becoming obsolete. Several key factors are highlighted (for example, reference values and corrective curves) which may lead to highly imprecise and inadequate evaluations of plant performance and, especially, operator behavior. It is important to bear in mind the systemic changes on the energy market. The current methodology focuses on controlling factors impacting power generating efficiency whereas the modern market is more complex and real costs are largely dependent on other variable costs, such as environmental fees, equipment wearing costs and the energy trading market. Statistical analysis of data is proposed as a modification of the current methodology. As most heat rate calculation is done on-line, it is possible to analyze this data in detail and apply, for example, PCA (Principle Component Analysis) and linear (and nonlinear) regression, thereby enabling a more accurate determination of the influence of principle process parameters on heat rate deviation. The article presents sample results of comprehensive analysis (two cases from different plants) of two twin units (heat rate calculation and process data analysis from a 12-month period) which to demonstrate the clear need to modify and update the old performance calculation approach.

Ways of enhancing operational effciency at power and CHP plants

51%

Bujalski W. , Świrski K. , Lewandowski J.

tom Vol. 91, nr 3

148-157

Changes on the electricity market mean that variable costs of energy generation are under unprecedented scrutiny. Add concerns over emission limits, particularly CO2 emissions, and a strong case emerges for enhancing generation efficiency Due to the construction parameters of existing plant and machinery, it is reasonable to assume that increased efficiency might be achieved by identifying optimal load distribution among generation units and rapid detection of elements whose technical condition may reduce efficiency. In both cases comprehensive knowledge about the attributes of existing equipment is required. This article presents methods to boost generation efficiency at current, functioning units.