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-wenkub.com
2025-05-07 00:57 本頁面
【正文】 發(fā)電公司有資格指控輸電公司在正常運行時提供的無功不足。所以發(fā)電廠為偶然事故的所準備的無功儲備應(yīng)該要小心定義。一個重要的問題是每個發(fā)電機應(yīng)該儲備多少的無功，因為無功的容量影響發(fā)電機的價格。在第二個例子中，負載條件和舉出例子是一樣的，包括 3 個補償器，但 是發(fā)電機幾乎運行在統(tǒng)一的功率因數(shù)。為了緊急運行無功補償必須能保持電壓在一個更寬的可接受的范圍從發(fā)電廠發(fā)出的無功。 例 1：沒有無功補償 例 2：無功補償像圖 1 所示 例 3：例 2（ 1380 KVAR）在母線 1所構(gòu)成的所有無功 例 4：增加母線 1 的無功以得到統(tǒng)一的功率因數(shù) 相似的條件可以從母線電壓處找到。圖中的負載和補償器都是三相的。 II、配電網(wǎng)絡(luò)中的無功補償 負載點無功補償?shù)闹饕康氖菧p小長距離輸電的無功功率和減少配電網(wǎng)絡(luò)的無功潮流，以及減少功率損耗和電壓降落。這 種必須運行的電廠在被管制的電力工業(yè)引起一些爭議。 在違規(guī)情況下，電力系統(tǒng)安全比以前面臨更多的威脅。發(fā)電機無功補償?shù)墓┙o成本可能不被分離列出，或者甚至發(fā)電機的無功能量作為 無功成本不被考慮。這些容性 /感性元件的容量并不常常是不變的。這種情形在幾個自給的互相聯(lián)絡(luò)的系統(tǒng)中甚至更復(fù)雜。隨著電力系統(tǒng)違規(guī)規(guī)則被廣泛接受，為了會合規(guī)則的精神和安全需求，電力系統(tǒng)管理和電力系統(tǒng)運行方面的專家被寄予不同的期望。中文 1970字 Reactive Power Planning and Operating in the Deregulated Power Utilities Ⅰ . INTRODUCTION The purposes of this paper are to review the current strategy of reactive power management and search for proper reactive power strategy, w hich is expected to result in a more efficient and economic way in reactive power management. These goals are actually consistent with the spirit of the deregulation of power industry. Reactive power affects system voltages, energy loss as well as system security. As power system deregulation has been widely accepted by power industry, the philosophy of reactive power management and power system operation is expected to be much different in order to meet the spirit of deregulation and the security requirements. In a vertically integrated utility, reactive power facilities are ow ned and operated by the same utility. The costs and contribution of reactive power supply are not precisely evaluated. Under deregulation circumstance, the obligations and rights of the ow ners of reactiv e power facilities bee an essential issue that affects not only the investment returns of power industry but also the power system security. This situation is even more plicated for the interconnection of several selfsupported systems. Reactive power is always required during power delivery in an AC system even there are no reactive power loads. However, unlike real power, reactive power is not consumed by any e
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