采用原子分解法的带并联补偿线路单相自适应重合闸  

Single-phase Adaptive Reclose of Shunt Compensated Transmission Lines Using Atomic Decomposition

作　　者：贾晶晶[1,2] 龚庆武[1] 李勋[1] 关钦月[1] 陈姝磊[3] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]太原供电公司,山西省太原市030012 [3]合肥供电公司,安徽省合肥市230000

出　　处：《电力系统自动化》2013年第5期117-123,共7页Automation of Electric Power Systems

基　　金：中央高校基本科研业务费专项资金资助项目(201120702020012)~~

摘　　要：带并联补偿输电线路单相瞬时性故障时,故障相恢复电压阶段会同时存在工频分量和低频分量,从而形成拍频现象。目前,基于上述原理的自适应重合闸判据抗干扰能力不强,且不能确定准确的熄弧时间。对此,文中采用一种新的信号处理方法——原子稀疏分解法分析非线性故障信号,以提取瞬时性故障时恢复电压阶段存在的低频分量,进而对故障性质作出判别;同时,原子稀疏分解法较强的时域和频域分析能力可以准确地确定故障熄弧时刻,为线路断路器的重合时刻整定提供依据。仿真实验验证了所述方法能够有效提高自适应重合闸性能。When a transient single-phase fault occurs on shunt reactor compensated transmission lines, there exist components of power frequency and low frequency during voltage recovery stages. This forms the pat frequency phenomenon. Currently, the adaptive reclose criterions based on this have poor performance against disturbances, and cannot be used to identify circuit arc extinguishing time. A new signal processing method the atomic sparse decomposition method is used to analyze nonlinear fault signals as well as to extract the low frequency components of recovery voltage when the transient single-phase fault occurs. The fault properties can also be identified. Atomic sparse decomposition is more accurate in determining the circuit arc extinguishing time because of its powerful time domain and frequency domain analysis capabilities. The algorithm also has coincidence time setting capability which provides the basis for circuit breaker overlap time setting. The simulation results show that the method proposed can effectively improve the adaptive reclose performance.

关 键 词：自适应重合闸 低频分量 信号局部特征量 原子稀疏分解 

分 类 号：TM762.2[电气工程—电力系统及自动化]