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。
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 d evices 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.
作者
于华楠
李永鑫
王鹤
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)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第7期1444-1453,共10页
Transactions of China Electrotechnical Society
基金
国家重点研发计划(2016YFB0901200)
吉林省科技厅项目(20160520089JH)资助。
关键词
扰动定位
过完备重构字典
稀疏特性
切机
切负荷
Disturbance location
overcomplete dictionary
sparse features
generator shedding
load shedding
