Abstract:This paper proposes a method for dynamic voltage flicker measurement based on Taylor-Fourier filter (TFF).Firstly,the envelope of voltage flicker is extracted by TFF,and the envelope parameters can be expressed by the Taylor coefficients.The estimation of the modulation depth,modulation frequency and detection of the envelope transients can thus be achieved.Secondly,the TFF of the extracted envelop is performed to estimate the time and frequency domain information of each flicker component.Finally,based on the estimated envelope parameters,the flicker values are calculated according to the definitions of IEC (international electrotechnical commission).Compared with the S-transform method based on Teager energy operator,the proposed method has higher accuracy and smaller calculation amount.The proposed method can achieve the measurement of time-varying voltage flicker.The measured results verify the accuracy and usefulness of the proposed method.
[1] 倪良华,肖李俊,历馨,等.基于HHT与闪变功率流向法的闪变源定位识别[J].电网与清洁能源,2018,34(1):26-31. Ni Lianghua,Xiao Lijun,Li Xin,et al.Flicker source tracing based on HHT and flicker power flow direction method[J].Power System and Clean Energy,2018,34(1):26-31. [2] Albistur C F,Aravena P A,Morán L A,et al.A simple predictive method to estimate flicker[J].IEEE Transactions on Industry Applications,2014,50(3):2150-2155. [3] IEC 61000-4-15 Testing and measurement tech- niques:flickermeter-functional and design specifica- tions[S].2010. [4] Gary W Chang,Cheng -I Chen,Huang Yalun.A digital implementation of flickermeter in the hybrid time and frequency domains[J].IEEE Transactions on Power Delivery,2009,24(3):1475-1482. [5] 李林,高云鹏,张韵琦,等.基于改进k值能量算子改进Chirp-Z变换的闪变包络参数提取[J].电工技术学报,2018,33(11):2636-2646. Li Lin,Gao Yunpeng,Zhang Yunqi,et al.Voltage flicker envelope tracking based on improved k-value energy operator and improved Chirp-Z transform[J].Transactions of China Electrotechnical Society,2018,33(11):2636-2646. [6] 高云鹏,李峰,陈婧,等.基于Teager-Kaiser能量算子Rife-Vincent窗频谱校正的电压闪变测量[J].电工技术学报,2014,29(6):248-256. Gao Yunpeng,Li Feng,Chen Jing,et al.Voltage flicker measurement using the Teager-Kaiser energy operator based on Rife-Vincent window spectral correction[J].Transactions of China Electrotechnical Society,2014,29(6):248-256. [7] 李建闽,林海军,梁成斌,等.基于双分辨率S变换和学习向量量化神经网络的电能质量扰动检测方法[J].电工技术学报,2019,34(16):3453-3463. Li Jianmin,Lin Haijun,Liang Chengbin,et al.Detection method of power quality disturbances based on double resolution S transform and learning vector quantization neural network[J].Transactions of China Electrotechnical Society,2019,34(16):3453-3463. [8] 易吉良,周曼,李中启,等.采用不完全S变换的复杂谐波参数估计[J].电工技术学报,2018,33(增刊1):112-120. Yi Jiliang,Zhou Man,Li Zhongqi,et al.Complex harmonic parameters estimation using incomplete S transform[J].Transactions of China Electrotechnical Society,2018,33(S1):112-120. [9] 牛胜锁,梁志瑞,张建华,等.基于三谱线插值FFT的电力谐波分析算法[J].中国电机工程学报,2012,32(16):130-136. Niu Shengsuo,Liang Zhirui,Zhang Jianhua,et al.An algorithm for electrical harmonic analysis based on triple-spectrum-line interpolation FFT[J].Proceedings of the CSEE,2012,32(16):130-136. [10] 李兰芳,马明,盛超,等.基于旋转因子变换插值的电压闪变检测算法[J].电工技术学报,2016,31(22):178-185. Li Lanfang,Ma Ming,Sheng Chao,et al.The voltage flicker detection algorithm based on rotation factor transforming interpolation[J].Transactions of China Electrotechnical Society,2016,31(22):178-185. [11] de la O Serna J A.Dynamic phasor estimates for power system oscillations[J].IEEE Transactions on Instrumentation &Measurement,2007,56(5):1648-1657. [12] Platas-Garza M A,de la O Serna J A.Dynamic harmonic analysis through Taylor-Fourier trans- form[J].IEEE Transactions on Instrumentation &Measurement,2011,60(3):804-813. [13] Belega D,Fontanelli D,Petri D.Low-complexity least-squares dynamic synchrophasor estimation based on the discrete Fourier transform[J].IEEE Transactions on Instrumentation and Measurement,2015,64(12):3284-3296. [14] JoséAntonio de la O Serna,Miguel Angel Platas- Garza.Maximally flat differentiators through WLS Taylor decomposition[J].Elsevier Digital Signal Processing,2011,21(2):183-194. [15] de la O Serna J A.Synchrophasor measurement with polynomial phase-locked-loop Taylor-Fourier filters[J].IEEE Transactions on Instrumentation &Measurement,2015,64(2):328-337. [16] 刘洁波,黄纯,江亚群,等.基于强跟踪泰勒-卡尔曼滤波器的动态相量估计算法[J].电工技术学报,2018,33(2):433-441. Liu Jiebo,Huang Chun,Jiang Yaqun,et al.Dynamic phasor estimator based on strong tracking Taylor- Kalman filter[J].Transactions of China Electro- technical Society,2018,33(2):433-441. [17] 雍静,晏小龙,曾礼强.电压间谐波对紧凑型荧光灯光闪变效应的实验研究[J].电工技术学报,2015,30(8):273-281. Yong Jing,Yan Xiaolong,Zeng Liqiang.Experi- mental study for flicker of compact fluorescent lamp caused by interharmonics[J].Transactions of China Electrotechnical Society,2015,30(8):273-281. [18] 唐求,滕召胜,高云鹏.基于S变换的平方检测法测量电压闪变[J].中国电机工程学报,2012,32(7):60-67. Tang Qiu,Teng Zhaosheng,Gao Yunpeng.Voltage flicker measurement using square demodulation method based on S-transform[J].Proceedings of the CSEE,2012,32(7):60-67. [19] Yao Wenxuan,Tang Qiu,Teng Zhaosheng,et al.Fast S-transform for time-varying voltage flicker analysis[J].IEEE Transactions on Instrumentation &Measurement,2013,63(1):72-79.