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电气化铁路谐波抑制的无源滤波器设计 被引量:1
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作者 刘晓悦 王泰达 《机械设计与制造》 北大核心 2023年第6期219-223,共5页
电气化铁路运行过程中,系统不仅存在低次谐波,还存在大量的高次谐波,这是由于电气化铁路主要运营着的交直交型机车,在行驶过程中和供电系统电气匹配不当,会使机车产生谐波并注入电网。为了能够有效抑制高速铁路的谐波谐振,基于电气化铁... 电气化铁路运行过程中,系统不仅存在低次谐波,还存在大量的高次谐波,这是由于电气化铁路主要运营着的交直交型机车,在行驶过程中和供电系统电气匹配不当,会使机车产生谐波并注入电网。为了能够有效抑制高速铁路的谐波谐振,基于电气化铁路的谐波特性,利用单调谐滤波器以及高通滤波器设计出了一种新型组合而成的无源滤波器的抑制高频谐波谐振策略,并证明了此设计的有效性。 展开更多
关键词 电气化铁路 谐波 抑制谐波 设计无源滤波器
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Optimum Design of Passive Shunt Filters for Power Distribution Networks
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作者 Sobhy Mohamed Abdelkader 《Journal of Energy and Power Engineering》 2013年第11期2129-2137,共9页
Static, passive, filters present an economic and simple solution to the harmonic distortion at the distribution level and at the same time supply the required reactive power for voltage support and/or power factor cor... Static, passive, filters present an economic and simple solution to the harmonic distortion at the distribution level and at the same time supply the required reactive power for voltage support and/or power factor correction. Applying these filters to a distribution network, if not properly designed, may have an adverse effect on the network. This paper presents analysis of the effects of using passive harmonic filters in a power distribution networks. The driving point impedance at the node where the filter installed, as a measure of how harmonic currents would produce harmonic voltages, is determined as function of the filter parameters. Hence, effects of filter parameters on the system impedance, parallel resonant frequency and impedance at resonance are illustrated. The effects of using more than one filter are also examined. A method for the optimal design of a passive filter considering the component limits, harmonic distortion limits and parameter tolerances is also presented. The proposed optimization model has proved its effectiveness through application to measurements at a real distribution feeder. 展开更多
关键词 Power quality HARMONICS filter design.
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Design of an Active-RC Low-Pass Filter with Accurate Tuning Architecture 被引量:2
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作者 陈方雄 林敏 +3 位作者 陈备 贾海珑 石寅 代伐 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第11期2238-2244,共7页
An active-RC low-pass filter of 5MHz cutoff frequency with a tuning architecture is proposed. It is implemented in 0. 18μm standard CMOS technology. The accuracy of the tuning system is improved to be within ( - 1.2... An active-RC low-pass filter of 5MHz cutoff frequency with a tuning architecture is proposed. It is implemented in 0. 18μm standard CMOS technology. The accuracy of the tuning system is improved to be within ( - 1.24%, + 2.16%) in measurement. The chip area of the tuning system is only a quarter of that of the main-filter. After tuning is completed, the tuning system will be turned off automatically to save power and to avoid interference. The in-band 3rd order harmonic input intercept point (IIP3) is larger than 16. ldBm, with 50Ω as the source impedance. The input referred noise is about 36μVrms The measured group delay variation of the filter between 3 and 5MHz is only 24ns,and the filter power consump- tion is 3.6roW. This filter with the tuning system is realized easily and can be used in many wireless low-IF receiver applications, such as global position systems (GPS), global system for mobile communications (GSM) and code division multiple access (CDMA) chips. 展开更多
关键词 CMOS circuit design auto tuning active RC filter wireless system
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