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Summary form only given. In a centralized market social welfare is the desired goal for investment and optimizing this objective will result in Pareto efficiency, assuming ";adequate and costless"; transfers among market participants. However, this principle is not always true in deregulated electricity systems, where such transfers are not always feasible due to jurisdictional constraints...
RTE becomes in 2005 an EDF subsidiary with enforced independent status, but RTE is practically operated and managed since 2000 as a separate and independent structure from EDF. RTE applies its own methodology to carry out investment decisions. This paper gives an overview of the transmission investments at RTE in the present market environment.
The European Union RES-E target for renewables for Ireland is 13.2% in 2010. ESB National Grid estimate that this corresponds to an installed capacity of 1,000 MW wind generation, together with some hydro and biomass. In order to determine the technical issues associated with accommodating various levels of wind generation from a system perspective, a number of areas need to be examined. Wind generation...
Due to wholesale market institutionalization in the Russian power sector, the generating companies become the key players on the wholesale electricity market. Pricing mechanism transformation in favor of marginal principles cause new risks for market participants. Risks, which influence market participants behavior and their classification are well-known. In our article we would pay special attention...
Independed power supply plan worked out on the ";;Renewable energy sources and hydro-power engineering";; department. It capacity is up to 30 kw and it is developed on the basis of renewable energy sources plant base modules combined use of small hydroelectric power station by capacity up to 10 kw, wind power station by capacity up to 8 kw and daily regulation pneumohydraulic accumulators...
Some problems are considered which arise when using gas- turbine units of a small capacity as power sources for operating in parallel with the power system generators or for autonomous power supply of consumers. It is shown that it is possible to ensure a reliable and stable power supply when taking special measures based on available or complementary technical means.
The paper present materials about application of shunt active filter for developing multifunctional conditioners. It shows structures of main circuits and control systems of the conditioner. The main advantage the new conditioner is combination functions of stabilizing output voltage and filtering high current harmonics as improving power factor of no liner loads. The important positive property of...
A major problem with wind power is that it is intermittent. Even if it were predictable, the problem of matching generation to demand is difficult. Storage is sometimes advocated, but this tends to be very expensive. The paper examines the main conventional solutions to the intermittency problem - provision of extra reserve generation to compensate for unexpected wind power lulls, and increased interconnection...
The high water purity demanded by the power industry requires removal of practically all the contaminants present in water supplies available to generating plants. For the demineralization system to operate reliably and economically, the ion exchange must be in good condition. The water treatment plants efficiency for the power industry is achieved through a careful selection of the ion exchangers,...
Recently, the investigation of extremely-low-frequency magnetic field has drawn a lot of researchers attention. The magnetic field of overhead power transmission lines has been studied extensively. In the present paper with the aid of Ansys 7.0 software current and loss in the shield of cable are computed for single phase and three phase cables.
Contemporary state of renewable electricity in Poland depends on the following facts: (1) installed capacity in existing power plants exceeds the electrical energy consumption, necessity in pollution limitation according to EU regulations needs exchange old power plants with new electrical energy sources, (2) according to J. Biedrzycki et al. (2003) installed capacity per capita in 2001 equal to 0...
Portugal is committed towards the EU to an ambitious target of attaining 39% of renewable energy production by 2010, as defined in the RES Directive. The new big hydroelectric investments, together with the mini-hydro power stations that are expected to be ready until 2010 will not be able to increase largely this share of needed renewable energy. The missing renewable energy should be produced exploiting...
In the report the priority resolution procedure of power industry objects of technical re-equipment are presented. The procedure takes into account the technical state of electrical equipment, economic circumstances and the investment value in power industry technical objects re-equipment. The procedure was approved at the several substations of the ";Federal Network Company EES"; in Russia.
The technological development experienced by industrialized countries has brought about a huge increase of demand of electric power. As a result, the utilities in charge of electric power transmission and distribution have noticed that the overhead lines are reaching critical values in different parameters, for this reason the maintenance is very important. In order to tackle this issue, we have undertaken...
Research of the electromagnetic torques influencing generators of various types at short circuits on the generator terminals, in a high voltage network is executed, and also at the tightened(delayed) short circuits and commutations in a high- voltage network. It is shown, that the greatest danger for the shaft turbine units represent delayed short circuit and switching operations in the networks,...
The field dependence of the complex permittivity for elastomeric composites filled with a ferroelectric ceramic powder PZT at the power frequency 50 Hz was studied in this work. The critical electric field strength for composites with different filler content was estimated. When the field strength is more than this critical level, the sharp increase in the relaxation time of the polarization process...
This paper describes the underlying complexities and nature of the situation for the transmission planning and investment challenges in the competitive environment. In the past, the ownership, operation and planning of the transmission network were in the hands of a single central entity. However, the unbundling of the electricity business has raised new challenges that confront the restructured industry...
This paper presents an idea and a role of multi- energy companies in the Polish energy markets. Authors present key aspects of development of Polish electricity market and rules of a co-operation in this area between communal and distribution entities. Paper includes also a description of the first M-E and M- I companies (M-ECO, M-ICO) operating in Poland. A profile and a role of these companies in...
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