全相位-混合基FFT在相量测量装置中的实现
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。...
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          | Published in | 电力系统保护与控制 Vol. 44; no. 20; pp. 65 - 69 | 
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| Main Author | |
| Format | Journal Article | 
| Language | Chinese | 
| Published | 
            太原理工大学电气与动力工程学院,山西太原,030024%国网临汾供电公司,山西临汾,041000%山西大学,山西太原,030006
    
        2016
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| Subjects | |
| Online Access | Get full text | 
| ISSN | 1674-3415 | 
| DOI | 10.7667/PSPC151774 | 
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| Summary: | 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。 | 
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| Bibliography: | all phase FFT; mixed radix FFT; DSP; all phase-mixed radix FFT; phasor measurement 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. 41-1401/TM SHAO Pu1, ZHAO Qingshengl, GUO Hehong2, ZHANG Xuejun3 (1. College of Electrical and Power Engineering, Taiyuan Uni  | 
| ISSN: | 1674-3415 | 
| DOI: | 10.7667/PSPC151774 |