电工技术学报  2020, Vol. 35 Issue (7): 1444-1453    DOI: 10.19595/j.cnki.1000-6753.tces.190451
电力系统 |
基于过完备字典设计的电力系统扰动定位方法
于华楠, 李永鑫, 王鹤
现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学) 吉林 132012
Disturbance Location Method of Power System Based on Over-Complete Reconstruction Dictionary Design
Yu Huanan, Li Yongxin, Wang He
Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin 132012 China
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摘要 电力系统扰动发生后,迅速准确地进行扰动源的定位是实施及时有效的电力系统安全稳定控制措施的重要前提。由于扰动不会大范围同时出现,因此扰动源在空间分布上具有稀疏特性,如何利用系统中配置的数量有限的同步相量测量装置感知电力系统中的扰动是一个重要的研究课题。提出一种基于过完备字典设计的电力系统扰动定位方法,其创新之处在于根据扰动后系统拓扑结构或电气参数的变化构造过完备字典,结合压缩感知重构算法从低维同步相量测量装置的观测数据中恢复出具有稀疏特性的高维扰动定位数据,完成电力系统扰动的定位。以切机与切负荷扰动为例,大量仿真结果表明,该方法能以很高的准确率完成扰动源位置的定位,对其他类型扰动定位也有重要的借鉴意义。
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关键词 扰动定位过完备重构字典稀疏特性切机切负荷    
Abstract:Disturbance location of power system quickly and accurately is an important precondition to implement safety and stability control measures of power system. The disturbance source has sparse characteristics in the spatial distribution since the disturbance will not occur in a large range at the same time. How to use the limited number of phasor measurement unit devices to perceive the disturbance in the power system is an important research topic. This paper presented a power system disturbance positioning based on a overcomplete dictionary design, its innovation is based on the changes of the system topology or electrical parameters of the disturbance to construct a overcomplete dictionary, in combination with compressed sensing reconstruction algorithm to recover from low dimensional phasor measurement unit observation data of the sparse characteristics to high dimensional disturbance location data, then the disturbance of power system got located. The generator shedding and the load shedding disturbance are taken as examples. A large number of simulation results show that the method proposed in this paper can locate the disturbance source with high accuracy, and it has important reference significance for other types of disturbance location.
Key wordsDisturbance location    overcomplete dictionary    sparse features    generator shedding    load shedding   
收稿日期: 2019-04-22      出版日期: 2020-04-07
PACS: TM744  
基金资助:国家重点研发计划(2016YFB0901200)和吉林省科技厅项目(20160520089JH)资助
通讯作者: 于华楠 女,1981年生,博士,副教授,研究方向为压缩感知在电力系统中的应用、电能质量信号检测与分析。E-mail:yhn810117@163.com   
作者简介: 李永鑫 男,1994年生,硕士研究生,研究方向为压缩感知在电力系统扰动定位中的应用。E-mail:542426856@qq.com
引用本文:   
于华楠, 李永鑫, 王鹤. 基于过完备字典设计的电力系统扰动定位方法[J]. 电工技术学报, 2020, 35(7): 1444-1453. Yu Huanan, Li Yongxin, Wang He. Disturbance Location Method of Power System Based on Over-Complete Reconstruction Dictionary Design. Transactions of China Electrotechnical Society, 2020, 35(7): 1444-1453.
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