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Research on the Detection Algorithm of Non Sinusoidal Power System

Author: WangHui
Tutor: WangYuFeng
School: Liaoning Technical University
Course: Power Electronics and Power Drives
Keywords: reative power Detection DSP wavelet algorithm MATLAB
CLC: TM711
Type: Master's thesis
Year: 2011
Downloads: 36
Quote: 0
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Abstract


This paper takes harmonic reactive various parameters measurement of the non-sinsoidal power system as the research object, to accurately detect the harmonic and reactive as a starting point, presents a new harmonic detection system. Through simulation experimental study on the application of the wavelet analysis in transient harmonic detection, it can be found that the break time in the temporary state can be counted and the fundamental current can be separated from power current in matlab. This paper especially doing further research at harmonic detection technology which caused much concern raises the theory of wavelet transform algorithm based on instantaneous reactive power. The simulation experiment indicates that this method achieves a good extraction harmonic and reactive current effect.Finally, this paper introduces the design of the control system based on DSP, including both the hardware and software. Through software debugging, shows that the system can measures three-phase base wave current, voltage base wave and waveform of non-sinusoidal, the RMS meritorious electric current and reactive current. Thus obtains three-phase voltages and currents of harmonic and voltage harmonic total aberrtion rate, every harmonic contains rate. And the experiment verified that the proposed detection algorithm is feasible. It shows that the system has data processing function, high accuracy, good real-time performance.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Theory and Analysis > Network analysis,power system analysis
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