Một số đề xuất giải pháp chiến lược phát triển Công ty điện lực TP. Hà Nội đến năm 2015 trong điều kiện hình thành và phát triển thị trường điện Việt Nam

- Trѭӡng ÿҥi hӑc BKHN Nghiên cͱu các v̭n ÿ͉ ̫nh h˱ͧng ÿ͇n vi͏c ÿánh giá ch̭t l˱ͫng ÿi͏n năng trong l˱ͣi phân ph͙iTrang 90 AbstractThe status of power supply has currently focused on meeting the demain in sufficient electricity volume in the context of the electricity shortage.
- More especially, power quality has not take much interest in when negotiating power trading between clients and the Power Purchase Agreement (PPA).The electricity price (tariff) is mainly paid more attention.
- Thus, PPA mentions electricity price and terms of payment otherwise power quality is ignored.
- In Euro, power quality takes one of important terms in the PPA.
- SARFIx and SARFIcurve index are one of technical specifications under consideration so that electricity consumers can make decision to select electricity supplier, negotiate electricity price or install additional technical measures to improve power quality (if needed).
- This study has just researched on SARFIx and SARFIcurve index of outgoing feeder No 474 of substation E17 at Thang Long industrial zone.
- The result shows that voltage sag is observed mainly in 0%-10% voltage range, uniform distribution in 10%-70% voltage range and rarely distribution in 70%-90%.
- Values of SARFIx and SARFIcurve index are same.
- The next is that the study has just researched on which factors affecting power quality much or little.
- Finally, I would like to put forward developing a study direction of voltage sag in the distribution system 22 kV when changing from dis-earthed neutral system into earthed system and from connected national system into isolated system or distributed generation system.

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