軟件測(cè)頻方法及其在交流電參數(shù)采集中的應(yīng)用
梁勇1,2,郭謀發(fā)1
1 福州大學(xué) 電氣工程與自動(dòng)化學(xué)院,福建 福州 350108;2 福州電業(yè)局,福建 福州 350009
摘 要:在傅里葉交流采樣算法的基礎(chǔ)上提出一種軟件測(cè)頻方法,該方法既保留了傅式算法濾波能力強(qiáng)的優(yōu)點(diǎn),又簡(jiǎn)化了系統(tǒng)的硬件測(cè)頻電路。闡述了軟件測(cè)頻的原理,推導(dǎo)交流電各個(gè)參數(shù)的計(jì)算公式,并結(jié)合單片機(jī)技術(shù)給出了一種基于STM32F103ZE處理器和AD7606模數(shù)轉(zhuǎn)換芯片的交流電參數(shù)采集實(shí)現(xiàn)方案,論述了軟件設(shè)計(jì)的流程,通過(guò)測(cè)試驗(yàn)證了該方案的適用性。
關(guān)鍵詞:交流采樣;軟件測(cè)頻;AD7606模數(shù)轉(zhuǎn)換芯片;STM32F103ZE處理器
中圖分類號(hào):TM935.1 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2013)12-0045-04
Software Frequency Measurement Method and Its Application in AC Parameters Acquisition
LIANG Yong1,2, GUO Mou-fa1
1 College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;
2 Fuzhou Power Supply Bureau, Fuzhou 350009, China
Abstract: On the basis of discrete Fourier transform AC sampling algorithm, this paper proposed a method of software frequency measurement. This method not only retained the advantages of the filtering ability of discrete Fourier transform algorithm, but also simplified the circuit of frequency measurement. This paper described the software frequency measurement principle, making a deduction for the formula of various AC parameters and giving an AC parameters acquisition implementation plan based on the STM32F103ZE processor and the AD7606 analog-to-digital conversion chip. The flowchart of software design was discussed. The test verifies the applicability of this implementation plan.
Key words: AC sampling; software frequency measurement; AD7606 analog-to-digital conversion chip; STM32F103ZE processor
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