大规模城市电网关键环节识别

发布时间：2018-05-09 18:44

本文选题：城市电网 + 潮流追踪　；参考：《华北电力大学》2017年硕士论文

【摘要】：特大型城市是国家的经济、文化或政治中心,其人口规模超大而且高度密集,城市电网的供电负荷量巨大,部分特大型城市的人口已超过2000万,最高负荷高达25GW以上,对电网运行的可靠性和安全性提出了极高的要求。近10年来,有多个特大型城市发生过大规模停电,均使国民经济遭受巨大损失,带来严重的社会混乱。因此,研究特大型城市电网特点,提高其安全水平是十分必要的。随着交直流混联系统大容量远距离向特大型城市输电以及电网间歇性电源增多等方面原因,大电网的安全将面临新的挑战。结合大规模城市电网的特点,考虑城市电网快速发展和运行实时性的要求,对影响电网安全运行的关键环节进行识别具有重要的现实意义。本文基于实际城市电网的潮流分布特点研究影响电网安全运行的系统关键环节识别问题。首先研究分析了基于潮流追踪和深度优先搜索的系统源流路径求取方法,以该方法作为系统关键环节辨识的基础;其次对比电网关键环节识别研究中存在的不足之处,结合链接分析和潮流追踪技术提出一种满足实时运行要求的电网关键节点辨识方法;最后考虑到大规模城市电网快速发展的需求,根据多项综合指标同时加入时间维度因素结合动态直觉模糊综合决策技术提出了一种新的城市电网关键线路识别体系。最后分别利用IEEE的10机39节点系统和实际的大规模都市电网作为算例验证了所提出方法的有效性。
[Abstract]:Super large cities are the economic, cultural or political centers of the country. Their population is very large and highly concentrated. The power supply load of urban power grid is huge. The population of some super large cities has exceeded 20 million, and the maximum load is above 25GW. The reliability and safety of power grid operation are very high. In the past 10 years, there have been massive power outages in many large cities, which have caused huge losses to the national economy and brought serious social chaos. Therefore, it is necessary to study the characteristics of super-large urban power grid and improve its safety level. With the large capacity long-distance transmission to large cities and the increase of intermittent power supply in AC / DC hybrid system, the security of large power grid will face new challenges. Considering the characteristics of large-scale urban power grid and the requirements of rapid development and real-time operation, it is of great practical significance to identify the key links that affect the safe operation of power grid. Based on the characteristics of power flow distribution in urban power grid, this paper studies the key link identification problem which affects the safe operation of power grid. Firstly, this paper studies and analyzes the method of source and flow path estimation based on power flow tracing and depth first search, and takes this method as the basis of system key link identification, and then compares the shortcomings in the research of power grid key link identification. Combined with link analysis and power flow tracing technology, a key node identification method is proposed to meet the requirements of real-time operation. Finally, considering the rapid development of large-scale urban power grid, A new identification system for key lines of urban power network is proposed based on the combination of time dimension factor and dynamic intuitionistic fuzzy comprehensive decision technology. Finally, the effectiveness of the proposed method is verified by using IEEE's 10-machine 39-bus system and the actual large-scale urban power grid as examples.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM732

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