【摘要】：為滿足遠距離清潔電力輸送及東部負荷發(fā)展的需要,特高壓技術正在我國得到大量應用。多回直流集中饋入受端負荷中心將是未來我國電網發(fā)展所面臨的重要問題,而功率/電壓穩(wěn)定就是其中重點研究課題之一。以往最大傳輸功率研究成果主要關注單回直流最大傳輸功率以及多饋入系統(tǒng)情形下某個直流的最大傳輸功率。但是,對于區(qū)域合計所能實現(xiàn)的最大直流傳輸功率,還未見有報道。該文對以往多饋入直流輸電系統(tǒng)靜態(tài)功率模型進行了拓展與深化,建立廣義的多饋入直流輸電系統(tǒng)靜態(tài)功率模型,揭示區(qū)域最大傳輸功率的含義,采用梯度法求解區(qū)域所能實現(xiàn)的最大傳輸功率,并通過矩陣變換化簡,在最大傳輸功率與傳統(tǒng)臨界多饋入短路比之間建立聯(lián)系。該文的研究成果為以往多饋入相關均衡性概念與結論提供了理論支持,對某一區(qū)域多饋入直流最大傳輸功率的分析及調整策略給出了新的方法,同時對規(guī)劃階段優(yōu)化直流布局起到指導作用。
[Abstract]:In order to meet the needs of long-distance clean power transmission and eastern load development, ultra-high voltage (UHV) technology is being widely used in China. The power / voltage stability is one of the most important problems in the future development of China's power grid, in which the multi-circuit DC centralized feed into the receiving load center will be an important problem in the future. Previous research on maximum transmission power mainly focused on the maximum transmission power of single circuit DC and the maximum transmission power of a DC in the case of multi-feed system. However, it has not been reported that the maximum DC transmission power can be achieved by the total area. This paper extends and deepens the static power model of multi-feed HVDC system, establishes a generalized static power model of multi-feed HVDC system, and reveals the meaning of the maximum transmission power in the region. The gradient method is used to solve the maximum transmission power which can be realized in the region, and the relation between the maximum transmission power and the traditional critical multi-feed short circuit ratio is established by matrix transformation. The research results of this paper provide theoretical support for the concept and conclusion of multi-feed correlation equilibrium, and give a new method to analyze and adjust the maximum transmission power of multi-feed DC in a certain region. At the same time, it plays a guiding role in the optimization of DC layout in the planning phase.
【作者單位】： 國家電網公司華東分部;上海交通大學電氣工程系;
【分類號】：TM721.1

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