Ryszard BARTNIK, Maciej SKRZYSZEWSKI
The question is: Is it really worth while to invest into renovation and modernization of the being privatized CHP and EP stations before they are sold? – an article inducing to discussion
Calculations presented in the article are only exemplary because the rational exploitation costs – overstating the selling cost of the analyzed EP station – were taken into account. As a matter of fact the CHP and EP stations exploitation cost structure in our national realities differs very much from the economically and technically well-founded structure. Thus it has a bearing on energy selling price in national power industry making it significantly lower. Employment in CHP and EP stations should be rationalized before privatization. As a result, their selling price will proportionally increase, while renovation and modernization before selling can only bring not more than several per cent. Practically, some political courage shown by decidents would be enough to enlarge the Treasure Department – and finally the whole nation – benefits of the process.
Ireneusz GRZĄDZIELSKI, Rafał WELENC, Tomasz PLUCIŃSKI
Wind-farm control algorithms in normal and fault power system working conditions
Wind-farms of output power over 50 MWs are more and more frequently installed in power systems. With the aim to ensure the safe system work operators began to implement the detailed requirements for the farms being connected. These requirements are also introduced by the recently modified Regulations of Transmission Grid Traffic Exploitation. In the article proposals concerning a big wind-farm control algorithms are presented. These algorithms are in accordance with the actual RTGTE requirements. Usefulness of these algorithms were checked during simulation tests. Results of the tests should be taken into account by the DSOs when defining the wind-farms system connection conditions. Practically they can also serve the realization of the farms digital control systems in a real power network.
Waldemar JĘDRAL
Diminishing of energy consumption in liquids transportation in the national economy
A considerable diminishing of energy consumption in liquids transportation needs the rational selection of pumps adequate for the system, optimization of hydraulic pump installation solutions as well as prevailing applying the energy-saving pump drives and control systems. Financial barriers should be overcome to enable modernization of small and middle-sized enterprises. Establishment of a national programm of enlarging liquids transportation effectiveness would be very helpful. New overhead 110 kV line constructions adapted to a large town conditions
Tomasz MUSIAŁ
Compact, overhead 110 kV lines as an alternative for cable system, using 110 kV line in Cracov as an example
Zakład Energetyczny Kraków SA – as the owner of Cracov power network – wanted to meet the town needs concerning the grounds assigned for Jagiellonian University Campus nr III and declared its contribution in the form of displacing the Skawina-Ruczaj 110 kV line situated now on the Campus central premises and thus being an incovenience to future development plans. The rebuilding of the line also secured connecting the Campus 110\15 kV station to the 110 kV netowork which is a vital thing for the power supply in the area.
Krzysztof PUT
New generation 110 kV line poles on the terrain of Katowice shopping-amusement center
The shopping-amusement center built in Katowice quarter Dąb by the Hungarian company TriGranit and called Silesia City Center was placed on the former Gottwald mine premises. There was a 110 kV double-circuit overhead power line there belonging to Górnośląski Zakład Energetyczny (now Vattenfall Distribution). Energoprojekt Kraków SA was charged with the task to free the future building site from the power line and solved the problem by installing 110 kV cable line. A vital element to realize it was to project and construct the appropriate cable poles.
Power Industry Academy
Stanisław CADER, Bogumił DUDEK, Roman FOBER, Tadeusz GONTARZ, Witold WIŚNIEWSKI
Session 7 – Live line works carried out on electric power units and installations – Thirteenth lecture – International standardization in the LLW
In 1976 in Paris the Technical Committee nr 78 „Equipment for LLW" began its activity. In 1994 in Poland the Standardization Problem Commission nr 72 – transformed in 2003 into Technical Committee – was brought into being. The problem of standardization is important not only for producers of the equipment, but also for its users. Applying the standardized technical requirements allows for an unconstrained flow of products and in consequence, also services for the need of LLW technics. In the paper described is the normalization works organization in Poland and cooperation with CEN, CENELEC and IEC. Examples concerning LLW equipment testing are given as well as the register of some more important standards and documents used for LLW in CENELEC activity.
BULLETIN of ZPBE ENERGOPOMIAR
Władysław POLECHOŃSKI, Sławomir TWARDOWSKI
Turbine condensate filtration in Polish power industry
Mentioned are exploitation problems concerning migrating oxides in water-steam EPS installations showing the need to filtrate the turbine condensate. Characterized are mechanical and magnetic filters used for the purpose. Ascertained is that the most suitable are electromagnetic filters. They are very effective and reliable and at the same time the cost of their exploitation is not high, they do not need servicing and the purchase price is relatively low.
Jerzy SOBOTA
Applying the PN-EN 12952-15:2004 (U) standard in a coal-fired boiler heat balance
Presented are chosen problems relevant to heat balance preparation and boiler thermal efficiency calculation on the basis of measurement results, taking into account the new standard requirements. The standard – in contradistinction to the hitherto obligatory – includes many additional parameters like powers applied to auxiliary equipment shafts situated inside the balance shield. Definitions concerning some other characteristic quantities are also different.
Adam LISZKA, Gwidon KONDRATOWICZ
Methods to lower a fluidized-bed boiler dust emission during its starting-up and outage operations
Presented is the elaborated and practically tested conception of an improved fluidized-bed boilers and their electrofilters starting-up and outage procedures – in the case of high capacity power units. Applying the method during starting-up and outage procedures allowed to lower the dust emission to parameters comparable with the ones obtained when normally running the block and, at the same time, raising the equipment working safety.
Zygmunt PILNY, Wojciech WRÓBLEWSKI
A survey of artificial power sources produced by Energopomiar-Elektrykę
Presented are results of investigations in the field of artificial power sources used for protection automatics in professional and industrial power engineering. Characterized are the series of types WP-25...1000 and WPu-1000...4000. Especially described are the latest units of the biggest output which construction and hardware are based on contemporary technology and many years of the company's experience.
POWER INDUSTRY AND ECOLOGY
Włodzimierz KOTOWSKI
Solar energy collectors in old dwelling houses
Presented are various technics and technologies of some considerable energy-saving innovations reducing demand for heat in old buildings by an average 70%. Detailed description was given of different alternatives concerning using solar radiation not only for building heating but also to heat water for domestic and sanitation use. Presented were techno-processing solutions for modern and energy saving dwelling-houses building – using different renewable energy sources.