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Research on Active Power Filter Harmonic Detection Method

Author: WeiZhiQiang
Tutor: WanJianRu
School: Tianjin University
Course: Power Electronics and Power Drives
Keywords: Active Power Filter Harmonic Detection Linear Neural Networks Adaptive lattice predictor Digital signal processor (DSP)
CLC: TM76
Type: Master's thesis
Year: 2007
Downloads: 437
Quote: 1
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Abstract


Power electronic devices widely used in chemical and other industrial sectors as metallurgy , iron and steel , coal and transportation , these nonlinear loads in operation will generate a lot of harmonics , resulting in energy loss , resonance , and electromagnetic interference . Compensation and governance become a major issue in the field of power electronics and power system power quality , active power filter APF (Active Power Filter) has also become one of the hot spots of industry and academia . Real-time and accuracy of the method of harmonic detection is an important factor to affect the active power filter compensation performance . Several apply to digital control systems , time-domain detection algorithm is analyzed and summarized , and linear neural network adaptive lattice prediction error filter , put forward a new harmonic detection algorithm . This paper first introduces the harmonic suppression and reactive power compensation analysis the APF works and art at home and abroad , as well as academia has been proposed by the the compensation current detection method and inverter control method . The more mature the the active separation method based on instantaneous reactive power theory of harmonic current detection method and based Fraze time domain analysis and comparison . Linear neural network used in adaptive noise cancellation technology , the minimum mean square error LMS algorithm neural network is trained by linear neural network adaptive lattice predictor . TI company the DSP chip TMS320VC33 and CPLD as the core control unit , developed a 60Kvar active power filter device . Hysteresis control of the PID control and DC bus voltage converter , active filter than ideal start by adjusting the parameters and PI parameters of the main circuit , and the DC bus voltage in APF process stable . Active filter device into the power grid, compensate load harmonic currents produced by the vacuum tank for a pharmaceutical company , has achieved the desired results .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
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