無功規(guī)劃及其在功率管理中的運行畢業(yè)論文外文翻譯-文庫吧
2025-04-17 00:57 本頁面
【正文】 ty, the costs of reactive power pensation might be included into distribution cost or transmission cost depending on w here the pensation devices are installed. The costs of reactive power supplied by generators might not be listed separately, or even the reactive power capacities of generators are not considered as the costs of reactive power. When utilities are doing reactive power planning, different utilities might have different considerations. No matter how utilities treat the costs of reactive power pensation or how they carry out the planning, the electricity price always reflects this part of costs. In the deregulated power industry, several questions that were not seriously discussed in regulated era are raised, such as: who is responsible for the reactive power pensation, are the providers of reactive power services, do consumers need to pay for the required reactive power loads, w hat roles should generation panies play in reactive power pensation, etc. Under deregulation circumstance, power system security faces more threats than ever. Due to the potential dynamic power trading, the reactive power requirements are also dynamically changing. Some generation units are inefficient in generating real power and are not petitive on power market. However, they are necessary to stay online in order to maintain system voltage. This type of mustrun units causes few arguments in the regulated power industry. Not all mustrun units must be online all the time. Depending load and operati ng conditions, some of them can be offline but must be standby and some of them must be online only under certain conditions. Most generators have a limitation of minimum real power output and can not simply operate as synchronous condensers. Their operating costs should include real power cost. Ⅱ .REACTIVE POWER COMPENSATION ATDISTRIBUTION LEVEL Main purposes of reactive power pensation at load sites are to reduce long distance transmission of reactive power and reduce the reactive power flow within distribution work, thus reduce
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