Dissertation > Industrial Technology > Electrotechnical > Electrical measurement techniques and instruments > Frequency, waveform parameter measurement and instrumentation

Zhongfu 300kA aluminum power system harmonic detection and warning systems

Author ZhangShuGang
Tutor XieYongFang
School Central South University
Course Control Engineering
Keywords Aluminum supply network Adaptive filter Harmonic Detection Early Warning System
Type Master's thesis
Year 2010
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With the rapid development of power electronics technology , a variety of power electronic devices on the grid harmonics generated increasingly serious harm . Henan Zhongfu combined company 300kA grade aluminum supply grid , systematic study of the properties of electrolytic rectifier for harmonic , harmonic motion detection method designed for aluminum electrolytic rectifier harmonic monitoring and early warning system for the electrolytic power supply network management and fault -line harmonics warning foundation. First introduced Zhongfu 300kA smelter grade rectified the basic conditions for the power grid , including the main power grid harmonic source , the generated harmonics harmonics on the production characteristics and the harm caused . Zhongfu 300kA rectification system for harmonics were analyzed , according to results of the analysis adopted targeted harmonic control method . Combined electrolytic rectifier for grid harmonic characteristics , we propose a modified adaptive filter based on dynamic harmonic detection method was established for the grid rectifier transformers, transmission lines, filtering devices and high-voltage grid harmonic model ; and analyzed a series resonant , parallel resonant warning model ; as a basis to study the harmonic ratio , phase unbalance and overload warning model . Based on Harmonic Analysis constructed large aluminum electrolytic rectifier for grid failure prediction model . Developed harmonic detection and early warning systems , and applied electrolytic rectifier power supply network , the actual application shows the developed system can achieve power rectifier for real-time monitoring of all the harmonics and fault warning for harmonic compensation for the rectifier and governance and provides the basis for failure prediction , can significantly reduce the incidence of failure .

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