Abstract：To achieve the seamless transfer and improve renewable energy utilization of the distributed generation system, a new islanding detection method without devastating and active power fluctuation is proposed in the paper. Periodic reactive current disturbance is injected, and the voltage frequency of PCC (point of common coupling) is forced to occur cyclical fluctuation. Sliding discrete Fourier transform method is used to extract the characteristic value in the frequency fluctuation, and the variation of the characteristic value before and after islanding is used to distinguish islanding. Theoretical analysis and simulations are conducted according to IEEE Std1547,and the results show that the proposed method can detect the islanding in the worst case.
钟诚, 井天军, 杨明皓. 基于周期性无功电流扰动的孤岛检测新方法[J]. 电工技术学报, 2014, 29(3): 270-276.
Zhong Cheng, Jing Tianjun, Yang Minghao. A New Islanding Detection Method With Periodic Reactive Current Disturbance. Transactions of China Electrotechnical Society, 2014, 29(3): 270-276.
[1] IEEE Draft Guide for Design, Operation, and Integration of Distributed Resource Island Systems with Electric Power Systems[S]. IEEE P15474/D11, March 2011. 2011: 1-55. [2] Zhihong Y, Kolwalkar A, Zhang Y, et al. Evaluation of anti-islanding schemes based on no detection zone concept[J]. IEEE Transactions on Power Electronics, 2004, 19(5): 1171-1176. [3] Ropp M E, Begovic M, Rohatgi A, et al. Determining the relative effectiveness of islanding detection methods using phase criteria and no detection zones[J]. IEEE Transactions on Energy Conversion, 2000, 15(3): 290-296. [4] Singam B, Hui LY. Assessing SMS and PJD schemes of anti-islanding with varying quality factor[C]. IEEE International Power and Energy Conference, 2006: 196-201. [5] Sung I J, Kwang Ho K. An islanding detection method for distributed generations using voltage unbalance and total harmonic distortion of current[J]. IEEE Transactions on Power Delivery, 2004, 19(2): 745-752. [6] 郭小强, 邬伟扬. 微电网非破坏性无盲区孤岛检测技术[J]. 中国电机工程学报, 2009, 29(25): 7-12. Guo Xiaoqiang, Wu Weiyang. Non-devastating islanding detection for microgrids without non- detection zone[J]. Proceedings of the CSEE, 2009, 29(25): 7-12. [7] Sunjae Y, Hyeongmin O, Sewan C. Controller design and implementation of indirect current control based utility-interactive inverter system[C]. IEEE Energy Conversion Congress and Exposition, 2011: 955-960. [8] Lopes L A C, Huili S. Performance assessment of active frequency drifting islanding detection methods [J]. IEEE Transactions on Energy Conversion, 2006, 21(1): 171-80. [9] 伞国成, 赵清林, 郭小强, 等. 光伏并网逆变器的间歇性频率扰动正反馈孤岛检测方法[J]. 电网技术, 2009, 33(11): 83-86. San Guocheng, Zhao Qinglin, Guo Xiaoqiang, et al. Islanding detection for photovoltaic grid-connected inverters based on intermittent frequency disturbance[J]. Power System Technology, 2009, 33(11): 83-86. [10] 张纯江, 郭忠南, 孟慧英, 等. 主动电流扰动法在并网发电系统孤岛检测中的应用[J]. 电工技术学报, 2007, 22(7): 176-180. Zhang Chunjiang, Guo Zhongnan, Meng Huiying, et al. Active current disturbing method for islanding detection of grid-connected inverters[J]. Transactions of China Electrotechnical Society, 2007, 22(7): 176-180. [11] Zeineldin H, Kirtley J. A simple technique for islanding detection with negligible non-detection zone[C]. IEEE Power & Energy Society General Meeting, 2009: 1-7. [12] 杨滔, 王鹿军, 张冲, 等. 基于无功电流-频率正反馈的孤岛检测方法[J]. 电力系统自动化, 2012, 36(14): 193-199. Yang Tao, Wang Lujun, Zhang Chong, et al. A novel islanding detection method based on positive feedback between reactive current and frequency[J]. Automation of Electric Power Systems, 2012, 36(14): 193-199. [13] Zeineldin H H. A d-q droop curve for facilitating islanding detection of inverter-based distributed generation[J]. IEEE Transactions on Power Electronics, 2009, 24(3): 665-673. [14] Ciobotaru M, Teodorescu R, Rodriguez P, et al. Online grid impedance estimation for single-phase grid-connected systems using PQ variations[C]. IEEE Power Electronics Specialists Conference, 2007: 2306-2312. [15] Wen C, Bangyin L, Shanxu D, et al. An islanding detection method based on dual-frequency harmonic current injection under grid impedance unbalanced condition[J]. IEEE Transactions on Industrial Informatics, 2013, 9(2): 1178-1187. [16] 张琦, 孙向东, 钟彦儒, 等. 用于分布式发电系统孤岛检测的偶次谐波电流扰动法[J]. 电工技术学报, 2011, 26(7): 112-119. Zhang Qi, Sun Xiangdong, Zhong Yanru, et al. Even harmonic current disturbing method for islanding detection[J]. Transactions of China Electro Technical Society, 2011, 26(7): 112-119. [17] Jae Hyung K, Jun Gu K, Young Hyok J, et al. An islanding detection method for a grid-connected system based on the goertzel algorithm[J]. IEEE Transactions on Power Electronics. 2011, 26(4): 1049-1055. [18] 马静, 米超, 王增平, 等. 基于负序电压分配因子的孤岛检测新原理[J]. 电网技术, 2012, 36(8): 239-42. Ma Jing, Mi Chao, Wang Zengping, et al. A novel islanding detection method based on negative sequence voltage distribution factor[J]. Power System Technology, 2012, 36(8): 239-242. [19] Karimi H, Yazdani A, Iravani R. Negative-sequence current injection for fast islanding detection of a distributed resource unit[J]. IEEE Transactions on Power Electronics, 2008, 23(1): 298-307. [20] Byung Gyu Y, Matsui M, Gwon Jong Y. A correlation-based islanding-detection method using current-magnitude disturbance for PV system[J]. IEEE Transactions on Industrial Electronics, 2008, 58(7) : 298-307. [21] Jacobsen E, Lyons R. The sliding DFT[J]. IEEE Signal Processing Magazine, 2003, 20(2): 74-80. [22] 王宝诚, 伞国成, 郭小强, 等. 分布式发电系统电网同步锁相技术[J]. 中国电机工程学报, 2013, 33(1): 50-56. Wang Baocheng, San Guocheng, Guo Xiaoqiang, et al. Grid synchronization and PLL for distributed power generation systems[J]. Proceedings of the CSEE, 2013, 33(1): 50-56.
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