作者：欧然¹, 肖先勇¹, 吴丹岳², 张逸², 王昕³

作者单位：1. 四川大学电气信息学院, 四川 成都 610065;
2. 福建省电科院, 福建 福州 350007;
3. 深圳市中电电力技术股份有限公司, 广东 深圳 518040

关键词：电压暂降;相位跳变;检测方法;特征电压

摘要：

针对目前相位跳变检测仍缺乏明确的国际标准, 提出检测三相系统电压暂降PAJ的4种不同定义和计算方法;方法1和2基于三相测量电压检测三相PAJ, 方法3和4基于复电压参数检测特征PAJ。详细研究修正频率和暂态过程对4种检测算法的影响, 以暂降严重程度和PAJ偏移程度为依据, 提出具有一般意义的三相系统PAJ检测标准。以100组系统实测数据对4种方法进行仿真验证, 结果表明所提方法正确有效, PAJ检测标准可行实用。

Detection of the phase angle jump for voltage sag in three-phase system

OU Ran¹, XIAO Xianyong¹, WU Danyue², ZHANG Yi², WANG Xin³

1. College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, China;
2. Electrical Power Research Institute, Fuzhou 350007, China;
3. Shenzhen Ceiec Electric Technology Inc., Shenzhen 518040, China

Abstract: The phase angle jump(PAJ) is one of the characteristics of voltage sag. However, there is still no international standard of PAJ detection. Four different definitions and calculations to detect PAJ of voltage sag in three-phase system are proposed. Each of three PAJ can be obtained by the method 1 and method 2, characteristic PAJ can get from the characteristic voltage by method 3 and method 4. Detailed studies of the influence of correcting frequency and transition segments are made on the four kinds of detection algorithms. Considering the distinction on sag severity and PAJ deviation degree, PAJ detection standards of general significance in three-phase system are recommended. Simulations of 100 sets of system measured data verify the correctness of proposed methods and the practicability of PAJ detection standards.

Keywords: voltage sag;phase angle jump;detection algorithm;characteristic voltage

2015, 41(6): 101-106  收稿日期: 2014-9-20;收到修改稿日期: 2014-12-2

基金项目: 

作者简介: 欧然(1992-),女,重庆市人,硕士研究生,专业方向为电压暂降分析与评估。

参考文献

[1] 肖湘宁, 韩民晓, 徐永海, 等. 电能质量分析与控制[M].北京:中国电力出版社, 2004:119-130.
[2] Mohseni M, Islam S M, Masoum M A S. Impacts of symmetrical and asymmetrical voltage sags on DFIG-based wind turbines considering phase-angle jump, voltage recovery, and sag parameters[J]. IEEE Trans on Energy Conversion, 2011, 26(5):1587-1598.
[3] 王伟, 陈宁, 朱凌志, 等. 双馈风力发电机低电压过渡的相角补偿控制策略[J]. 中国电机工程学报, 2009, 29(21):62-68.
[4] IEEE Standard 1159—1995. IEEE recommended practice for monitoring electric power quality[S]. New York:IEEE Press, 1995.
[5] IEC standtard 61000-4-30. Testing and measurement techniques-power quality measurement methods[S]. Gen-eva, Switzerland:IEC, 2008.
[6] Bollen M, Gordon J R, Djokic S, et al. Voltage dip immunity of equipment and installations[C]∥2010 China International Conference on Electricity Distribution, 2010.
[7] Bollen M H J, Zhang L D. Different methods for classification of three-phase unbalanced voltage dips due to faults[J]. Electric power systems research, 2003, 66(1):59-69.
[8] Bollen M H J. Understanding power quality problems:voltage sag and interruption[M]. New York:IEEE press, 2000:94-121.
[9] Bollen M H J. Algorithms for characterizing measured three-phase unbalanced voltage dips[J]. IEEE Trans on Power Delivery, 2003, 18(3):937-944.
[10] Zhang L D, Bollen M H J. Characteristic of voltage dips (sags) in power systems[J]. IEEE Trans on Power Delivery, 2000, 15(2):827-832.