|
|
|
| Research on Rapid Detection Algorithm for Voltage Sag Based on D-Q Transformation |
| Lu Xiaoyi |
| Zhuhai Power Supply Bureau, Guangdong Power Grid Corporation, Zhuhai, Guangdong 519000 |
|
|
|
|
Abstract Aiming at the demand for fast voltage sag detection in DVR, this paper proposes a novel rapid voltage sag detection arithmetic which based on dq transformation. The principle of proposed detection method is different with traditional method in fundamental wave separation and the way to construct the virtual three-phase voltage when it used on single-phase voltage sag detection. The proposed detection algorithm can eliminate the time delay of low pass filter in traditional fundamental wave separation algorithm, which has better synchronism when construct three-phase voltage in the single-phase voltage sag detection. This paper gives analysis on the principles that how to construct three-phase voltage and separate the fundamental wave from the detection voltage, it also take the harmonic which generated with the voltage sag into consideration. Finally the validity of the proposed algorithm is verified by the simulation results.
|
|
Published: 22 December 2014
|
|
|
|
[1] Song H S, Nam K. Instantaneous phase-angle estimation algorithm under unbalanced voltage-sag conditions [J]. IEE Proceedings Generation Transmission and Distribution, 2000, 147(6): 409-415.
[2] Parsons A C, Mack W G, Powers E J. A wavelet-based procedure for automatically determi- ning the beginning and end of transmission system voltage sags[A]. IEEE Proceedings of PES Winter Meeting[C]. New York, USA, 1999, 2: 1310-1315.
[3] Zhan Changjiang J, Fitzer C, Ramachandaramurthy V K, et al. Software phase-locked loop applied to dynamic voltage restorer[A]. IEEE Proceedings of PES Winter Meeting[C]. Columbus, USA, 2001, 2: 1033-1038.
[4] 肖湘宁, 徐永海, 刘连光. 考虑相位跳变的电压凹陷动态补偿控制器研究[J]. 中国电机工程学报, 2002, 22(1): 64-69.
[5] 赵国亮, 刘宝志, 肖湘宁, 等. 一种无时延的改进dq变换在动态电压扰动识别中的应用[J]. 电网技术, 2004, 28(7): 53-57.
[6] 彭春萍, 陈允平, 孙建军. 动态电压恢复器及其检测方法的探讨[J]. 电力自动化设备, 2003, 23(1): 68271.
[7] 杨亚飞, 颜湘武, 娄尧林. 一种新的电压骤降特征量检测方法[J]. 电力系统自动化, 2004, 28(2): 41-44.
[8] 周晖, 齐智平, 何飚. 单相DVR快速电压补偿控制的实现[J]. 电力系统自动化, 2007, 35(6): 61-65. |
|
|
|
2014, Vol. 15 
