Abstract：The wind turbine filter presents low impedances at some harmonic frequencies, the error of harmonic emission level is large. This paper presents a new method to estimate the D-PMSG wind farm harmonic emission level at the point of common coupling (PCC) based on the improved covariance characteristic. According to the wind turbine filter and the wind farm network topology, the impedance of each component is aggregated to simplify the calculation of the D-PMSG wind farm additional harmonic impedance. The expression of the deviation of harmonic voltage and current at the PCC and the harmonic impedances on system side and wind farm side is established by the improved covariance characteristic. Then, the system harmonic impedance and the D-PMSG wind farm harmonic emission level can be calculated. The proposed method avoids the error caused by the correlation between harmonic current at the PCC and background harmonic. It verifies that the proposed method can effectively eliminate the influence of background harmonic on the results through simulation and practice case.
熊敏, 杨洪耕. 基于改进协方差特性的永磁直驱风电场谐波发射水平评估[J]. 电工技术学报, 2020, 35(3): 603-611.
Xiong Min, Yang Honggeng. Assessment Method of D-PMSG Wind Farm Harmonic Emission Level Based on the Improved Covariance Characteristic. Transactions of China Electrotechnical Society, 2020, 35(3): 603-611.
[1] Tentzerakis S, Paraskevopoulou N, Papathanassiou S, et al.Measurement of wind farm harmonic emissions[C]//IEEE Power Electronics Specialists Conference, Rhodes, Greece, 2008: 1769-1775. [2] 甘磊, 吴臻, 谷纪亭, 等. 风电集群接入系统规划的混合整数线性模型[J]. 电工技术学报, 2017, 32(5): 165-175. Gan Lei, Wu Zhen, Gu Jiting, et al.A MILP model for grid-connection transmission system planning of wind farm clusters[J]. Transactions of China Electrotechnical Society, 2017, 32(5): 165-175. [3] Liang Xiaodong.Emerging power quality challenges due to integration of renewable energy sources[J]. IEEE Transactions on Industry Applications, 2017, 53(2): 855-866. [4] 王深哲, 高山, 李海峰, 等. 含风电接入的电网规划方案电能质量评估[J]. 电工技术学报, 2013, 28(8): 56-65. Wang Shenzhe, Gao Shan, Li Haifeng, et al.Evaluation of power quality in grid planning scheme with wind power integration[J]. Transactions of China Electrotechnical Society, 2013, 28(8): 56-65. [5] 何世恩, 郑伟, 智勇, 等. 大规模集群风电接入电网电能质量问题探讨[J]. 电力系统保护与控制, 2013, 41(2): 39-44. He Shien, Zheng Wei, Zhi Yong, et al.Power quality issues of large-scale cluster wind power integration[J]. Power System Protection and Control, 2013, 41(2): 39-44. [6] Yang Honggeng, Pirotte P, Robert A.Harmonic emission levels of industrial loads statistical assessment[C]// CIGRE Proceedings: International Council on Large Electric Systems, Paris, France, 1996: 456-462. [7] Xu W, Liu Yilu.A method for determining customer and utility harmonic contributions at the point of common coupling[J]. IEEE Transactions on Power Delivery, 2000, 17(1): 210-216. [8] Liang Shun, Hu Qiaohui, Lee W J.A survey of harmonic emissions of a commercially operated wind farm[J]. IEEE Transactions on Industry Applications, 2012, 48(3): 1115-1123. [9] 汤波, 林顺富, 陈光, 等. 居民配电网负荷谐波电流发射水平评估方法[J]. 电工技术学报, 2018, 33(3): 533-542. Tang Bo, Lin Shunfu, Chen Guang, et al.The harmonic current emission level of the residential loads in the distribution network[J]. Transactions of China Electrotechnical Society, 2018, 33(3): 533-542. [10] 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. [11] 龚华麟, 肖先勇, 刘亚梅, 等. 基于主导波动量筛选原理的用户谐波发射水平估计方法[J]. 中国电机工程学报, 2010, 30(4): 22-27. Gong Hualin, Xiao Xianyong, Liu Yamei, et al.A method for assessing customer harmonic emission level based on the dominant fluctuation filtering principle[J]. Proceedings of the CSEE, 2010, 30(4): 22-27. [12] 张巍, 杨洪耕. 基于二元线性回归的谐波发射水平估计方法[J]. 中国电机工程学报, 2004, 24(6):54-57. Zhang Wei, Yang Honggeng.A method for assessing harmonic emission level based on binary linear regression[J]. Proceedings of the CSEE, 2004, 24(6): 54-57. [13] 艾永乐, 王玉栋, 都静静, 等. 基于LTS初值的稳健回归的谐波发射水平评估方法[J]. 电力系统保护与控制, 2015, 43(21): 99-105. Ai Yongle, Wang Yudong, Du Jingjing, et al.A method for assessing harmonic emission level based on robust regression of LTS initial value[J]. Power System Protection and Control, 2015, 43(21): 99-105. [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] 陈宝平, 林涛, 陈汝斯, 等. 直驱风电场经VSC-HVDC并网系统的多频段振荡特性分析[J]. 电工技术学报, 2018, 33(增刊1): 176-184. Chen Baoping, Lin Tao, Chen Rusi, et al.Characteristics of multi-band oscillation for direct drive wind farm interfaced with VSC-HVDC system[J]. Transactions of China Electrotechnical Society, 2018, 33(S1): 176-184. [16] 钟再敏, 江尚, 康劲松, 等. 永磁同步电机谐波电压与电流的耦合模型及前馈控制[J]. 电工技术学报, 2017, 32(18): 131-142. Zhong Zaimin, Jiang Shang, Kang Jinsong, et al.A harmonic voltage and current coupling permanent magnet synchronous motor model and feedforward control[J]. Transactions of China Electrotechnical Society, 2017, 32(18): 131-142. [17] 程维虎, 来向荣. 复值随机变量的协方差与相关性[J]. 中央民族大学学报: 自然科学版, 2001,10(1): 19-21. Cheng Weihu, Lai Xiangrong.Covariance and correlation coefficient of complex random variables[J]. Journal of the Central University for Nationalities: Natural Science Edition, 2001, 10(1): 19-21. [18] Badrzadeh B, Gupta M, Singh N, et al.Power system harmonic analysis in wind power plants-Part I: Study methodology and techniques[C]//IEEE Industry Applications Society Annual Meeting, Las Vegas, USA, 2012: 1-11. [19] 杨洪耕, 肖先勇, 刘俊勇. 电能质量问题的研究和技术进展(二)——供电网谐波的测量与分析[J]. 电力自动化设备, 2003, 23(11): 1-4. Yang Honggeng, Xiao Xianyong, Liu Junyong.Issues and technology assessment on power quality part2: measurement and analysis for harmonic in supply network[J]. Electric Power Automation Equipment, 2003, 23(11): 1-4. [20] 赵熙, 杨洪耕. 基于快速独立分量分析的系统侧谐波阻抗计算方法[J]. 电力系统自动化, 2015, 39(23): 139-144. Zhao Xi, Yang Honggeng.Method of calculating system-side harmonic impedance base on FastICA[J]. Automation of Electric Power Systems, 2015, 39(23): 139-144.
2020, Vol. 35 
