renewable energy sources (res), especially wind power plants, have high priority of promotion in the energy policies worldwide. an increasing share of res and distributed generation (dg), should, as has been assumed, provide improvement in reliability of electricity delivery to the customers. paper presented here concentrates on electricity storage systems technologies and applications pinpoint...

Traditionally, conventional generation unit was used to provide ancillary services e.g. reactive power support, and spinning reserve. Nonetheless, with the emergence of highly penetrated distributed energy resources (DERs) systems and considering how beneficial they can be; it appears reasonable to use them as reactive power providers. Therefore, this paper introduces a new procedure for DERs t...

This paper argues that electricity market reform – particularly the need for complementary mechanisms to remunerate capacity – need to be analysed in the light of the local regulatory and institutional environment. If there is a lack of investment, the priority should be to identify the roots of the problem. The lack of demand side response, short-term reliability management procedures and unco...

due to uncertain nature of wind and photovoltaic power units, the participation of this units in electricity markets is subjected to significant deviation penalties. this issue leads to despondency or even admission of these units in the competitive environment. with regard to this fact that the low deviations are available when predictions are performed in a short-term horizon and also distrib...

purpose: the aim of this study was to design a pattern for delivering outreach library services to the retirees of the education department of bojnourd. methodology: this was an applied study. the statistical population consisted of all the retirees of the education department of bojnourd city in 2013. the estimated sample size was 130 and cluster sampling was adopted. data were collected throu...

Ancillary services on the interconnected grid are necessary support for power transmission while maintaining reliable operation and to ensure exact level of quality safety. So many activities operator classified under preview ancillary correct meaning explanation some these distinctions given enough clarity. The basic three with importance that provided by independent producers in a deregulated...

The relationship of hospital ownership and service composition to hospital charges was examined for 456 general acute hospitals in California. Ancillary services had higher profit margins, both gross and net profits, than daily hospital services. Ancillary services accounted for 55.3 percent of total patient revenue. Charges per day were 23 percent higher for ancillary services than for daily h...