中国电机工程学报2025，Vol.45Issue(z1)：138-150,13.DOI:10.13334/j.0258-8013.pcsee.251196
新型配电系统电能质量扰动波形稀疏测量方法及其硬件实现
Sparse Measurement Method for Power Quality Disturbance Waveforms in New Distribution Systems and its Hardware Implementation
摘要
Abstract
Under the"dual carbon"goals,large-scale integration of distributed renewable energy makes the operating state of the distribution system complex.Real-time waveform measurement data,which contains the essential dynamic behavior characteristics,is required for situational awareness,fault isolation,and restoration control.To address the challenges of directly obtaining and analyzing massive waveform data,this paper proposes a novel sparse measurement method for disturbance waveforms and implements it on a domestically-produced MCU to meet the monitoring and control needs of modern distribution systems.First,a disturbance start and end time determination method based on relative differential sliding windows is proposed as the initiation criterion for the measurement algorithm.To achieve efficient sparse decomposition of power quality disturbance waveforms,this paper designs an extended Gabor(Ex-Gabor)overcomplete dictionary to capture both global periodicity and local volatility,addressing the time-varying and complex dynamic characteristics of distribution network disturbances.Additionally,based on an improved cosine algorithm,an optimized matching pursuit process is proposed by refining candidate solution initialization and adjusting nonlinear control parameters,to maintain reconstruction accuracy while reducing computation time and improving tracking efficiency.Finally,simulation and real data tests show that the proposed algorithm achieves a compression ratio greater than 8 for common disturbance waveforms in the distribution network while ensuring reconstruction accuracy.关键词
新型配电系统/稀疏分解/过完备字典/匹配追踪/正余弦算法Key words
new distribution system/sparse decomposition/overcomplete dictionary/matching pursuit/sine cosine algorithm分类
动力与电气工程引用本文复制引用
孙典涛,刘灏,毕天姝,陈艳霞,辛锋,王存平..新型配电系统电能质量扰动波形稀疏测量方法及其硬件实现[J].中国电机工程学报,2025,45(z1):138-150,13.基金项目
国家电网有限公司科技项目(5400-202411177A-1-1-ZN). Science and Technology Project of State Grid Corporation of China(5400-202411177A-1-1-ZN). （5400-202411177A-1-1-ZN）
