Identification of Main Harmonic Current Sources Based on the directions of Reactive Power

doi:10.11930/j.issn.1004-9649.201702056

Abstract

Abstract: Currently it is difficult to pinpoint the origin of power loss in power system components as caused by harmonic current. To solve this problem, the paper proposes a method to locate harmonic current sources at the Point of Common Coupling (PCC) based on the directions of reactive power. Normally the power loss caused by harmonic current flowing through power system components can be attributed to be from either power system side or user side. The attribution is indicated by harmonic current index. The paper proposes a method to identify harmonic current sources (either power system side or user side) based on the phase difference between harmonic voltage and current. The proposed method is based on the harmonic impedance characteristics of the power system, measured harmonic voltage and current at PCC, circuit theory and inequality constraint. Finally, the approach is demonstrated and validated by the real data obtained in field tests. Experimental results suggest that the proposed approach is not only convenient to use but also has great engineering value.

Key words: reactive power direction method, phase boundary, main sources of harmonic current

CLC Number:

TM72

XU Cheng, ZHAO Hong, WANG Jincao, YUAN Lin. Identification of Main Harmonic Current Sources Based on the directions of Reactive Power[J]. Electric Power, 2018, 51(11): 88-95.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201702056

https://www.electricpower.com.cn/EN/Y2018/V51/I11/88

References

[1] LI C, XU W, TAYJASANANT T. A critical impedance based method for identifying harmonic sources[J]. IEEE Transactions on Power Delivery, 2004, 19(2):671-678.
[2] XU W, LIU X, LIU Y. An investigation on the validity of power-direction method for harmonic source determination[J]. IEEE Transactions on Power Delivery, 2003, 18(1):214-219.
[3] XU W, LIU Y. A method for determining customer and utility harmonic contributions at the point of common coupling[J]. IEEE Transactions on Power Delivery, 2000, 15(2):804-811.
[4] 贾静然, 段晓波, 卢锦玲, 等. 变压器的谐波传递特性研究[J]. 中国电力, 2017, 50(1):92-96, 157. JIA Jingran, DUAN Xiaobo, LU Jinling, et al. Research on harmonic transfer characteristics of transformer[J]. Electric Power, 2017, 50(1):92-96, 157.
[5] 叶建新, 黄健豪, 张禄亮, 等. 东莞配电网谐波对配电变压器危害分析[J]. 电力自动化设备, 2011, 31(7):146-149. YE Jianxin, HUANG Jianhao, ZHANG Luliang, et al. Analysis of harmonic harm to distribution transformers[J]. Electric Power Automation Equipment, 2011, 31(7):146-149.
[6] 崔杨柳, 马宏忠, 唐一鸣, 等. 基于部分岭估计的系统谐波阻抗与谐波发射水平的评估方法[J]. 中国电力, 2015, 48(4):137-140, 146. CUI Yangliu, MA Hongzhong, TANG Yiming, et al. Assessing harmonic impedance and the harmonic emission level based on partial ridge estimate[J]. Electric Power, 2015, 48(4):137-140, 146.
[7] 张良县, 陈模生, 彭宗仁, 等. 非正弦负载电流下特高压换流变压器绕组的谐波损耗分析[J]. 中国电机工程学报, 2014, 34(15):2452-2459. ZHANG Liangxian, CHEN Mosheng, PENG Zongren, et al. Study on the harmonic losses of UHV converter transformer windings subject to non-sinusoidal load current[J]. Proceedings of the CSEE, 2014, 34(15):2452-2459.
[8] 周林, 张凤, 栗秋华, 等. 配电网中谐波源定位方法综述[J]. 高电压技术, 2007, 33(5):103-108. ZHOU Lin, ZHANG Feng, LI Qiuhua, et al. Methods for localizing the harmonic source in power distribution network[J]. High Voltage Engineering, 2007, 33(5):103-108.
[9] 华回春, 贾秀芳, 曹东升, 等. 电能质量数据交换格式下的谐波责任估计[J]. 电网技术, 2013, 37(11):3110-3117. HUA Huichun, JIA Xiufang, CAO Dongsheng, et al. Harmonic contribution estimation under power quality data interchange format[J]. Power System Technology, 2013, 37(11):3110-3117.
[10] YANG H, PIROTTE P, ROBERT A. Harmonic emission levels of industrial loads statistical assessment[J]. CIGRE, 1996, 96:1936-1996.
[11] 惠锦, 杨洪耕, 叶茂清. 基于阻抗归一化趋势判别的谐波发射水平估计[J]. 中国电机工程学报, 2011, 31(10):73-80. HUI Jin, YANG Honggeng, YE Maoqing. Assessing harmonic emission level based on the impedance gathering trend discrimination[J]. Proceedings of the CSEE, 2011, 31(10):73-80.
[12] 车权, 杨洪耕. 基于稳健回归的谐波发射水平估计方法[J]. 中国电机工程学报, 2004, 24(4):39-42. CHE Quan, YANG Honggeng. Assessing the harmonic emission level based on robust regression method[J]. Proceedings of the CSEE, 2004, 24(4):39-42.
[13] 邱思语, 杨洪耕. 改进的加权支持向量机回归的谐波发射水平估计方法[J]. 电工技术学报, 2016, 31(5):85-90. QIU Siyu, YANG Honggeng. Assessment method of harmonic emission level based on the improved weighted support vector machine regression[J]. Transactions of China Electrotechnical Society, 2016, 31(5):85-90.
[14] 惠锦, 杨洪耕, 林顺富, 等. 基于独立随机矢量协方差特性的谐波发射水平评估方法[J]. 电力系统自动化, 2009, 33(7):27-31. HUI Jin, YANG Honggeng, LIN Shunfu, et al. Assessment method of harmonic emission level based on covariance characteristic of random vectors[J]. Automation of Electric Power Systems, 2009, 33(7):27-31.
[15] 华回春, 贾秀芳, 曹东升, 等. 系统谐波阻抗估计的极大似然估计方法[J]. 中国电机工程学报, 2014, 34(10):1692-1699. HUA Huichun, JIA Xiufang, CAO Dongsheng, et al. A maximum likelihood method for harmonic impedance estimation[J]. Proceedings of the CSEE, 2014, 34(10):1692-1699.
[16] 袁林, 杨洪耕, 王智琦, 等. 基于快速近似联合对角化的谐波发射水平评估方法[J]. 电力系统自动化, 2017, 41(7):81-87. YUAN Lin, YANG Honggeng, WANG Zhiqi, et al. Assessment method of harmonic emission level based on fast approximate joint diagonalization[J]. Automation of Electric Power Systems, 2017, 41(7):81-87.
[17] XU W. Power direction method cannot be used for harmonic source detection[C]//Power Engineering Society Summer Meeting. IEEE, 2000:873-876.
[18] 陈甜甜, 胡蓉, 金祖洋, 等. 邻近直流输电落点的城市电网谐波传导特性分析[J]. 电网技术, 2015, 39(10):3000-3004. CHEN Tiantian, HU Rong, JIN Zuyang, et al. Analysis research on harmonic transmission characteristics of urban power network adjacent to uhvdc terminal location[J]. Power System Technology, 2015, 39(10):3000-3004.
[19] 王建勋, 刘会金, 刘春阳. 基于复合判据的谐波/间谐波源识别方法[J]. 电力自动化设备, 2013, 33(7):63-69, 80. WANG Jianxun, LIU Huijin, LIU Chunyang. Identification of harmonic and interharmonic sources based on composite criterion[J]. Electric Power Automation Equipment, 2013, 33(7):63-69, 80.
[20] 唐振东, 杨洪耕, 马晓阳, 等. 偏远地区风电场的并网谐振现象分析[J]. 电网技术, 2016, 40(5):1415-1421. TANG Zhendong, YANG Honggeng, MA Xiaoyang, et al. Analysis on grid-connected resonance of wind farm in remote areas[J]. Power System Technology, 2016, 40(5):1415-1421.