摘要
建立基于有效值的功耗等效模型,借助快速有效值检测算法,提出了等功耗指令电流控制方法。该方法利用复杂电参量波形和标准正弦波形两者功耗等效的特点,根据需要将复杂电参量波形与有效值相等的正弦波形瞬时值进行比较,便可获得相应的谐波和无功信息,从而避免了传统有源滤波器中应用瞬时无功理论的复杂计算过程,并获得较好的谐波、无功检测结果。作为验证条件,搭建了新方案仿真模型,并给出了仿真研究结果。最后,在样机上进行了实验,实验波形及实验数据分析结果表明,该方法具有物理意义明晰、易于实现等特点,可有效应用于谐波抑制和无功补偿等领域。
An equivalent power consumption model based on rapid RMS detection is presented and the equivalent power consumption instructive current control method is proposed,which,based on the fact that the complex waveform of electric variable is equivalent to the standard sine waveform in power consumption,compares the complex waveform of electric variable with the standard sine waveform with same RMS value to obtain the information of harmonic and reactive currents. It detects well the harmonic and reactive currents without the ~omplicated computation based on the instantaneous reactive power theory applied in traditional active filter. For verification,the corresponding simulation models are built and the results of simulative analysis are shown. The experimental waveforms and data of a prototype show that,the proposed control method for harmonics suppression and reactive power compensation is clear in physical significance and easy to implement.
出处
《电力自动化设备》
EI
CSCD
北大核心
2012年第12期16-21,共6页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51077044)
湖南省研究生创新基金资助项目(521298295)~~
关键词
有源滤波器
无功功率
谐波分析
补偿
低通滤波器
模型
active filters
reactive power
harmonic analysis
compensation
low pass filter
models
