论文标题:基于FPGA的电力系统谐波检测
The Measurement of Harmonics in Power System Based on FPGA
论文作者 吴茂存
论文导师 许广银,论文学位 硕士,论文专业 控制理论与控制工程
论文单位 山东科技大学,点击次数 131,论文页数 78页File Size2713k
2005-05-01论文网 http://www.lw23.com/lunwen_423473822/ 谐波检测;频谱泄漏;VHDL;FPGA
harmonic ; frequency spectrum leakage ; VHDL ; FPGA
电力系统自诞生以来,就孪生了电力系统谐波,随着电子装置的广泛应用,谐波问题变得日益严重,电力谐波已经成为电力系统的公害。谐波检测是谐波研究中的一个重要的分支,是解决其他相关谐波问题的基础,因此进行谐波检测的研究具有重要的理论意义和实用价值。 本论文主要是从谐波检测理论和实现方法上探讨了高精度、高实时性谐波检测数字系统的相关问题。 论文中阐述了电力系统谐波的相关概念和产生原理,并分析了电力谐波的特点。在检测理论上,本文采用FFT理论来计算谐波含量,研究了Radix—2 FFT在谐波检测中的应用,描述了FFT分析过程中的频谱泄漏现象,并从理论上研究了频谱泄漏的根源。 为了解决频谱泄漏问题,本文提出了采用锁相倍频技术方法,跟踪电力系统工频频率变化,从而有效减少频谱泄漏。在谐波检测中,FFT运算量很大、对速度和精度要求苛刻,本文探讨了应用FPGA实现FFT信号处理的方法。
Since the power system was born, harmonics in power system had been in existence. With the extensive use of electronic installations, harmonic problems become increasingly serious, power system harmonic has already become the public hazard of power system. Harmonic measurement is one important branch of harmonic research and the foundation to solve other harmonic problems ,so there is important theoretical and practical significance in research of harmonic measurement .This thesis mainly probes into the digital harmonic measuring system with high accuracy , high real-time character in measuring theory and realized approach .The thesis explaines the relevant concepts of power system harmonic and the principle of harmonic producing, the thesis analyses the character of harmonic. In measurement theory, the thesis adopts FFT theory to calculate harmonic content, studys the process of Radix-2 FFT for harmonic measurement, expatiates the phenomenon and analyses the theory of frequency spectrum leakage.In order to solve the problem of frequency spectrum leakage , the thesis proposes the technology of phase locking synchronous sampling control circuit, the technology can track the change of power system frequency to reduce leakage. In the harmonic measurement, FFT has a very large operation amount with high speed and precision . The thesis probes into FPGA to realize the FFT digital signal processing.
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