多馈入直流系统区域最大传输功率算法

发布时间：2019-04-12 07:58

【摘要】：为满足远距离清洁电力输送及东部负荷发展的需要,特高压技术正在我国得到大量应用。多回直流集中馈入受端负荷中心将是未来我国电网发展所面临的重要问题,而功率/电压稳定就是其中重点研究课题之一。以往最大传输功率研究成果主要关注单回直流最大传输功率以及多馈入系统情形下某个直流的最大传输功率。但是,对于区域合计所能实现的最大直流传输功率,还未见有报道。该文对以往多馈入直流输电系统静态功率模型进行了拓展与深化,建立广义的多馈入直流输电系统静态功率模型,揭示区域最大传输功率的含义,采用梯度法求解区域所能实现的最大传输功率,并通过矩阵变换化简,在最大传输功率与传统临界多馈入短路比之间建立联系。该文的研究成果为以往多馈入相关均衡性概念与结论提供了理论支持,对某一区域多馈入直流最大传输功率的分析及调整策略给出了新的方法,同时对规划阶段优化直流布局起到指导作用。
[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.
【作者单位】：国家电网公司华东分部;上海交通大学电气工程系;
【分类号】：TM721.1

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