| 引用本文: | 康静,郑建勇,饶莹,曾伟,袁涛.改进的FBD法在电流实时检测中应用[J].电力自动化设备,2007,27(5):77-80 |
| .Application of improved FBD method in real-time current detection[J].Electric Power Automation Equipment,2007,27(5):77-80 |
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| 摘要: |
| 为了使有源滤波器快速有效地检测出三相四线制电力系统中的谐波和无功电流,提出了一种基于FBD(Fryze-Buchholz-Dpenbrock)法的改进的电流检测方法。该方法利用抽样降低系统计算量,并用一个陷波滤波器和一个高截止频率的低通滤波器串联代替一个低截止频率的低通滤波器提取直流分量,提高了检测方法的实时性。该方法可以在系统电压畸变的情况下检测出三相电流的基波正序有功电流分量、基波正序无功电流分量、不对称电流及谐波电流分量。Matlab仿真结果表明了该方法的正确性和有效性。 |
| 关键词: 电流检测,三相四线,FBD法,抽样 |
| DOI： |
| 分类号:TM93 |
| 基金项目: |
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| Application of improved FBD method in real-time current detection |
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KANG Jing ZHENG Jian-yong RAO Ying ZENG Wei YUAN Tao
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| Abstract: |
| An improved FBD(Fryze-Buchholz-Dpenbrock) method is presented for the quick and effective detection of harmonic and reactive current of APF(Active Power Filter) in 3-phase 4-wire power system.Sampling is used to reduce the calculation and a trap filter in series with a low pass filter with higher cut-off frequency is designed to extract the DC component instead of a low pass filter with low cut-off frequency,improving the real-time performance of current detection.The fundamental positive-sequence active and reactive currents,unsymmetrical current and harmonic current can be detected in case of voltage distortion.Simulations with Matlab prove its correctness and effectiveness. |
| Key words: current detection,three-phase four-wire,FBD-method,sampling |
