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The principles of the creation of the control system for the pumping complex variable-frequency electric drive, taking into account the alteration of the current parameters of the hydrosystem

Zagirnyak M., Kovalchuk V., Korenkova T.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 12

38--41

EN

We demonstrated that the alteration of the basic parameters of the pumping and pipeline equipment accompany the pumping complexes functioning in the unsteady operation modes. We considered the special features of the creation of the extreme system of the automatic control of the pumping complex variable-frequency electric drive taking into account the alteration of the current parameters of the electrohydraulic equipment. We presented the algorithm of the operation of the considered extreme system. The algorithm grounds on the identification of the pumping complex parameters based on the equations of the balance of the hydraulic power harmonic components between the power supply and the elements of the hydrosystem.

PL

Wykazano, że zmienność podstawowych parametrów pompowania i wyposażenia rurociągowego wprowadza system pompowania w stan nieustalony. Rozważono specjalne właściwości tworzenia ekstremalnego systemu automatycznego sterowania napędem zespołu pompowego przy zmienności parametru prądowego w urządzeniu elektrohydraulicznym. Zaprezentowany został algorytm działania rozważanego systemu ekstremalnego. Algorytm bazuje na identyfikacji parametrów zespołu pompowego bazujące na równaniu równowagi pomiędzy mocą zasilania i elementów hydrosystemu.

2

Assessment of the reliability-cost efficiency of the pumping subsystems at water treatment plant

Zimoch I., Szymik-Gralewska J.

Ecological Chemistry and Engineering. S

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2016

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Vol. 23, nr 3

435--445

EN

In last years all countries of the European Union experience decrease of water consumption. What is worse, in most cases large European water treatment plants (WTP) have been design and built decades ago, when water consumption was much higher than nowadays. It is a challenging task to adjust WTP’s capacity to the current water demand as it is associated with costs and safety issues. Minding that fact, authors decided to propose an new authorial methodology of combined reliability-cost efficiency assessment for water supply system with exceeded redundant capacity, based on new index - unit indicator of reliability-cost efficiency. It included both reliability and costs aspects. It was decided to present the new method on example of the pumping subsystems working for WTP in Poland. The research was based on Activity-Based Life Cycle Costs (AB-LCC) methodology together with two-parametric reliability evaluation. Using real operational and financial data an application of proposed authorial reliability-cost indicator was presented. The reliability-cost efficiency assessment allowed to present how operation of each pumping subsystem influenced global operational costs of WTP. This information is essential for decision-making process for rational management of technical facilities.

3

Pompownia obiegu sieciowego źródła ciepła

Wowk J.

Pompy, Pompownie

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2010

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nr 1 (136)

36-37

PL

Podkreślenie roli charakterystyki wymaganej układu i analizy zmian w sezonie grzewczym. Szczegółowe omówienie jedno i trzystopniowego systemu pompowania wraz z przykładem rozwiązania układu.

EN

Emphasis of the role of the required characteristic and the analysis of changes during the heating period. Detailed description of single and three-stage pumping system, and an example of application.