引用本文: | 邵璞,赵庆生,郭贺宏,张学军.全相位-混合基FFT在相量测量装置中的实现[J].电力系统保护与控制,2016,44(20):65-69.[点击复制] |
SHAO Pu,ZHAO Qingsheng,GUO Hehong,ZHANG Xuejun.Realization of all phase-mixed radix FFT on the phase measurement device[J].Power System Protection and Control,2016,44(20):65-69[点击复制] |
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摘要: |
传统的傅里叶变换在测量非整周期的数据时会出现频谱泄露的现象,而快速傅里叶变换(FFT)只能对长度为2的整次幂(基-2)的数据进行处理,无法对非基-2的其他数据计算。为了解决以上问题,提出了一种全相位-混合基FFT算法。并详细介绍了全相位FFT、混合基FFT的原理以及全相位-混合基FFT在DSP中的实现过程。通过测试表明全相位-混合基FFT在电压、频率的测量精度较传统FFT有一定优势。将该算法应用到以DSP为核心的相量测量装置当中,对电网的状态进行实时监测,实测结果证明该算法准确可靠,在电力系统运行当中有一定实用价值。 |
关键词: 全相位FFT 混合基FFT DSP 全相位-混合基FFT 相量测量 |
DOI:10.7667/PSPC151774 |
投稿时间:2015-10-09修订日期:2016-02-28 |
基金项目:国网山西省电力公司科技项目资助(晋电发展[2014]88号) |
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Realization of all phase-mixed radix FFT on the phase measurement device |
SHAO Pu,ZHAO Qingsheng,GUO Hehong,ZHANG Xuejun |
(College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China ;Linfen Electric Power Company, Linfen 041000, China;Shanxi University, Taiyuan 030006, China) |
Abstract: |
The traditional FFT algorithm may cause spectrum leakage while calculating frequency and amplitude. The FFT algorithm is usually radix-2 FFT which can’t compute sequences that length is composite accurately. To solve these problems, an all phase-mixed radix FFT algorithm is proposed. All phase FFT, mixed radix FFT principle and the realization process of all phase-mixed FFT are also introduced. Through the actual test it is shown that all phase-mixed radix FFT algorithm outperforms traditional FFT algorithm in voltage and frequency measurement. Moreover, the algorithm is applied in the DSP for monitoring actual power grid as the core of the phase measurement device. The actual application result shows that the algorithm is accurate and reliable, and it has certain practical value upon the phase measurement. |
Key words: all phase FFT mixed radix FFT DSP all phase-mixed radix FFT phasor measurement |