|
|
|
| Compatibility between Low Voltage Variable-Frequency Drives and Voltage Sags in Distribution Systems |
| Xu Yonghai1, Li Chenyi1,2, Wang Kun1, Lu Wenqing1 |
1. State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University Beijing 102206 China
2. Chengdong Power Supply Center State Grid Chengdu Electric Power Supply Company Chengdu 610011 China |
|
|
|
|
Abstract Firstly, the performance and mechanism of the variable-frequency drive (VFD) affected by voltage sags were deeply analyzed by theoretical analysis and experiments. Then, 7 representative brands of VFDs in domestic market with small and medium power (7.5kW & 18.5kW) were selected as the samples. The influence of various factors was tested on the sample VFDs. Further, the general tolerance curves of VFDs under the most severe sag type (three-phase sag) were obtained by comprehensive analysis of more than 13 000 groups of test data. Moreover, a method considering the compatibility probability of uncertain region was proposed. In this method, based on test data and measured sags, the probability distribution models were established using the modified maximum entropy method improved by logarithmic transformation, which include the models of fault probability of VFDs in uncertain region and amplitude and duration of sags in the distribution system. Then, the compatibility probability in uncertain area and total numbers for no trip were calculated. Finally, compared with other probabilistic fitting methods and traditional compatibility analysis methods, the validity and accuracy of the proposed method were verified.
|
|
Received: 02 February 2018
Published: 29 May 2019
|
|
|
|
|
|
[1] 周道军. 变频器防低电压穿越分析[J]. 江苏电机工程, 2015, 34(2): 37-40.
Zhou Daojun.The analysis of frequency converter prevent low voltage ride through[J]. Jiangsu Electrical Engineering, 2015, 34(2): 37-40.
[2] Weldemariam L E, Gärtner H J, Cuk V, et al.The performance of sensitive equipment to voltage dips from field measurements[C]//Proceedings of the 2015 12th IEEE Africon international Conference-Green Innovation for African Renaissance, Addis Ababa, Ethiopia, 2015: 1-5.
[3] 邵文权, 王龙, 王建波, 等. 火电厂给煤机变频器电压暂降抗扰力[J]. 电力建设, 2015, 36(3): 88-93.
Shao Wenquan, Wang Long, Wang Jianbo, et al.Voltage sag immunity of coal feeder inverter in power plants[J]. Electric Power Construction, 2015, 36(3): 88-93.
[4] 吴跨宇, 卢岑岑, 陈凯, 等. 低压变频器及其电压支撑装置测试系统研究开发[J]. 浙江电力, 2016, 35(2): 1-6.
Wu Kuayu, Lu Cencen, Chen Kai, et al.Research and development of testing system for low voltage frequency converter and its voltage support device[J]. Zhejiang Electric Power, 2016, 35(2): 1-6.
[5] 李江龙, 王丽, 陈文波. 基于直流供电技术的电压暂降保护系统研究[J]. 电源学报, 2015, 13(5): 105-111.
Li Jianglong, Wang Li, Chen Wenbo.Research on voltage sag protection based on DC power supply technology[J]. Journal of Power Supply, 2015, 13(5): 105-111.
[6] Bollen Math H J. Understanding power quality problems: voltage sags and interruptions[M]. Piscata- way NJ: IEEE Press, 1999.
[7] Djokic S Z, Stockman K, Milanovi J V, et al.Sensitivity of AC adjustable speed drives to voltage sags and short interruptions[J]. IEEE Transactions on Power Delivery, 2005, 20(1): 494-505.
[8] Weldemariam L E, Gärtner H J, Cuk V, et al.Experimental investigation on the sensitivity of an industrial process to voltage dips[C]//Proceedings of 2015 IEEE Eindhoven Power Tech, Eindhoven, Netherlands, 2015: 1-6.
[9] 徐永海, 陶顺, 肖湘宁. 电网中电压暂降和短时间中断[M]. 北京: 中国电力出版社, 2015.
[10] Working Group C4.110. Voltage dip immunity of equipment and installations[R]. CIGRE, 2010.
[11] IEEEStd 1346-1998 IEEE recommended practice for evaluating electric power system compatibility with electronic process equipment[S]. 1998.
[12] DL/T 1648-201 发电厂及变电站辅机变频器高低电压穿越技术规范[S]. 中国电力企业联合会, 2016.
[13] Martinez J A, Martin-Arnedo J.Voltage sag studies in distribution networks, part Ⅱ: voltage sag assessment[J]. IEEE Transactions on Power Delivery, 2006, 21(3): 1670-1678.
[14] Jhan Y C, Milanovic J V.Methodology for assessment of financial losses due to voltage sags and short interruptions[C]//9th International Conference on Electrical Power Quality and Utilisation, Barcelona, Spain, 2007, DOI: 10.1109/EPQU.2007. 4424119.
[15] 肖先勇, 马超, 杨洪耕, 等. 用电压暂降严重程度和最大熵评估负荷电压暂降敏感度[J]. 中国电机工程学报, 2009, 29(31): 115-121.
Xiao Xianyong, Ma Chao, Yang Honggeng, et al.Stochastic estimation of equipment sensitivity to voltage sag based on voltage sag severity index and maximum entropy principle[J]. Proceedings of the CSEE, 2009, 29(31): 115-121.
[16] 贾清泉, 艾丽, 董海艳, 等. 考虑不确定性的电压暂降不兼容度和影响度评价指标及方法[J]. 电工技术学报, 2017, 32(1): 48-57.
Jia Qingquan, Ai Li, Dong Haiyan, et al.Uncertainty description and assessment of incompatibility & influence index for voltage sags[J]. Transactions of China Electrotechnial Society, 2017, 32(1): 48-57.
[17] Lu Chan-Nan, Shen Cheng-Chieh.Estimation of sensitive equipment disruptions due to voltage sags[J]. IEEE Transactions on Power Delivery, 2007, 22(2): 1132-1137.
[18] 王亚奇. 电铁牵引负荷扰动电流概率分布模型研究[D]. 北京: 华北电力大学, 2017.
[19] Djokic S Z, Munshi S M, Cresswell C E.The influence of overcurrent and undervoltage protection settings on ASD sensitivity to voltage sags and short interruptions[C]//Proceedings of 2008 4th IET Conference on Power Electronics, Machines and Drives, York, UK, 2008: 130-134.
[20] Std P1668-2014 IEEE Standard Association. IEEE trial-use recommended practice for voltage sag and short interruption ride-through testing for end-use electrical equipment rated less than 1000V[S]. New York, 2014.
[21] 王兆安, 刘进军. 电力电子技术[M]. 北京: 机械工业出版社, 2009.
[22] 徐永海, 兰巧倩, 洪旺松. 交流接触器对电压暂降敏感度的试验研究[J]. 电工技术学报, 2015, 30(21): 136-146.
Xu Yonghai, Lan Qiaoqian, Hong Wangsong.Experimental research on AC contactor sensitivity during voltage sags[J]. Transactions of China Electrotechnial Society, 2015, 30(21): 136-146.
[23] 吴亚盆, 刘颖英, 徐永海. 可编程序控制器对电压暂降敏感度的试验研究[J]. 电工技术学报, 2018, 33(6): 1422-1430.
Wu Yapen, Liu Yingying, Xu Yonghai.Experimental research on PLCs sensitivity during voltage sags[J]. Transactions of China Electrotechnial Society, 2018, 33(6): 1422-1430. |
|
|
|
2019, Vol. 34 
