Harmonic Detection System Based On Multi-processor Power Study

As the nonlinear loads of industrial and civilian load increasing, the power harmonic of voltage and current waveforms are distorted, and the high harmonics are fed back to the power supply, the quality of power is badly polluted. Therefore, the power harmonic has got widespread attention and concern, and harmonic measurement is the basis for dealing with harmonic problems, and also the basis for analyzing and controlling harmonic of power system.Traditional power harmonic detectors are mainly based on single chip, so it is difficult to meet real-time and high-precision requirement of harmonic detection. The power harmonic detection system based on multiprocessor flame is studies in this paper, the FPGA+DSP+ARM architecture is proposed, the IP core of FPGA is used to implement FFT computation, DSP is used to implement computing, ARM is used to implement control functions. The detection system takes advantage of these three processors sufficiently, measures the electrical quantities accurately and in real-time, provides a good user interface for easy monitoring and controlling. Firstly the principle of electrical quantities detection based on FFT algorithm is introduced, the deducing and expressions are also given, then the FPGA+DSP+ARM multiprocessor structure detection system is constructed, the realization and the working principle of the system is illuminated. The system is divided into several blocks, the hardware and software implementation of each block is researched. Finally the experiments show the system meets the target performance requirements.