论文部分内容阅读
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.“,”To meet the need of long-distance power transmission and load increase of East China, the ultra high voltage direct current transmission (UHVDC) technology and multi-infeed HVDC power into load center are implemented. Substantial issues were proposed for power system operation and planning, however, power/voltage stability of multi-infeed HVDC system is one of them. Previously,maximum available power (MAP) study is mainly on MAP of single infeed system and/or each DC circuit in multi infeed system. However, the aggregate maximum DCavailable power of the whole region has not been explored. The paper established the generalized multi-infeed HVDC system model, proposed the meaning of regional aggregate MAP, used gradient method to solve the maximum transmission power. Furthermore, the links between maximum transmission power solution and the traditional critical multi-infeed short circuit ratio were established by matrix transformation technique. The research results provide theoretical support for related concepts and conclusions, give new method for the analysis and adjustment strategy of the maximum transmission power of a regional multi-infeed DC, and play a guiding role in the optimization of DC layout in planning stage.