PARTYGA S.
Manufacturing and Operation of Transformers.
History, Present Day and Future
Energetyka 2001, no. 4, p. 167, 8 refs.
Mentioned are Polish firms, which manufactured transformers in 1933, as well as foreign firms, which had sales offices in Poland. Discussed is after- war development of these equipment manufacturing, since a new transformer factory was taken under operation in half of sixties of previous century up to present day. Characterised is a develop ment of transformer diagnostics. Inserted is a calendar of top achieve ments of the Polish transformer industry.
ZBUDNIEWEK A.
110 kV/ MV, 6 to 63 MVA Transformers
Energetyka 2001, no. 4, p. 171, 1 tab.
Given are requirements of the contemporary transformer market. At the background of these there are characterised transformers with rat ings 6 to 63 MVA and 110 kV/ MV fulfilling responsible functions in the power system. The attention is paid to reliability, evaluation of losses and influence on the environment of these equipment.
DOMŻALSKI T.
Directions of Contemporary Transformer Diagnostics
Energetyka 2001, no. 4, p. 172, 3 figs, 1 tab. , 18 refs.
Discussed are essential elements of the contemporary diagnostics of power transformers, based on experiences of western power compa nies and failure analysis of Polish transformers. A main assumption of this is to desist from periodical systematic tests and to introduce multi- stage diagnostics utilising mainly results of tests do not requir ing outage of transformers.
MARCINIAK W. R. , BEDNAREK M.
Design Solutions of Transformers with Separated Windings
Energetyka 2001, no. 4, p. 178, 4 figs, 1 tab. , 4 refs.
Presented are design solutions of three winding transformers with separated windings of lower voltage. Given are advantages and draw backs of two alternatives of winding configuration and the most sig nificant calculation results of short circuit forces.
SIEDLAREK M.
ZREW S. A. Transformatory Janów within a Group of Manufacturers of Power Transformers
Energetyka 2001, no. 4, p. 182
There have been presented a firm, which as essential products offers overhauls and modernisation activity as well as service of machines and technological lines. The firm is continuously expanding a market activity and is introducing new market products. Transformatory Janów is one of plants of ZREW SA - a joint stock company, which shares are recorded in the stock exchange.
BŁAJSZCZAK G.
Analysis of Crisis in the Californian Power System
Energetyka 2001, no. 4, p. 184, 5 figs, 4 tabs, 6 refs.
Presented is a history of Californian electric energy market, charac terised is generation and consumption of electric energy, factors caus ing increase of electric energy prices, and reasons of outages. Given is a manner of repair of Californian market mechanisms. Polish power situation at the background of Californian crisis is presented.
KUBSKI P.
Influence of Inner Superheating Between Stages on a Power Unit Efficiency
Energetyka 2001, no. 4, p. 189, 2 figs
An analysis of simplified steam power plant scheme with an inner steam superheating between stages proves, that when the super heating parameters are adequately chosen, an increase of the turbine can be achieved, so an increase of a power plant efficiency. However, necessary is to introduce into the power plant scheme a large- size membrane heat exchanger of steam - steam type.
PAWLĘGA A.
Rebates for Consumers if a Distribution Company does not Meet Admissible Voltage Deviations
Energetyka 2001, no. 4, p. 193, 1 figs, 4 tabs, 5 refs.
A right of a consumer to achieve a rebate for voltage deviations exceeding admissible values is not unconditional and it depends on fulfilling defined requirements mentioned in the paper. According to the regulations, voltage deviations are defined on the base of mea surements of mean in 15 min. effective values of voltage. Acquisition of these data requires to install by the consumer a stationary record ing system. Values of rebate lump rates require renewed analysis.
FULCZYK K.
Modernisation of Supply with Electric Energy of Power Station General Auxiliaries
Energetyka 2001, no. 4, p. 197, 5 figs
Using as an example T rów Power Station there are described problems accompanying modernisation of the supply system for power station general auxiliaries. Presented are successive stages of mod ernisation and achieved effects. Full cycle of the modernisation last ed 5 years and was ended in November 2000.