| 电压畸变条件下软件锁相环精度提高 |
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| 引用本文： | 李东,韦统振,霍群海,高绪华. 电压畸变条件下软件锁相环精度提高[J]. 电力电子技术, 2011, 45(7): 95-97 |
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| 作者姓名： | 李东 韦统振 霍群海 高绪华 |
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| 作者单位： | 中国科学院电工研究所,北京,100190 |
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| 基金项目： | 国家自然科学基金(50807052)~~ |
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| 摘 要： | 串联补偿设备要求在电网电压畸变的条件下,能够准确地锁住电压基波正序相位.基于瞬时无功理论的软件锁相环(SPLL)技术是目前常用的锁相方法,但该方法有一定的误差.这里设计了一个低通滤波器(LPF),能够在电网电压存在谐波、跌落、直流分量等情况下高精度地锁相,从而使串联补偿设备获得较好的补偿效果.仿真和实验证明了该方法的精...
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| 关 键 词： | 软件锁相环 低通滤波器 精度 |
The Improving of Soft Phase Locked Loop Precision Under Voltage Disortion |
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| LI Dong,WEI Tong-zhen,HUO Qun-hai,GAO Xu-hua. The Improving of Soft Phase Locked Loop Precision Under Voltage Disortion[J]. Power Electronics, 2011, 45(7): 95-97 |
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| Authors: | LI Dong WEI Tong-zhen HUO Qun-hai GAO Xu-hua |
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| Affiliation: | LI Dong,WEI Tong-zhen,HUO Qun-hai,GAO Xu-hua(Institute of Electrical Engineering Chinese Academy of Science,Beijing 100190,China) |
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| Abstract: | It is necessary to capture the phase of positive-sequence fundamental component of voltage accurately for series compensation devices,under voltage disortion.The software phase locked loop(SPLL) method based on the instan-taneous reactive power theory is commonly used,which has some errors.A low pass filter is added based on the anal-ysis and it can improve the SPLL precision under the condition that the sags,harmonics and DC component occur in power system.So a better compensation effect can be achieved by... |
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| Keywords: | software phase locked loop low pass filter accuracy |
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