【摘要】：首先利用快速傅里葉變換分析了用于孤島檢測(cè)的傳統(tǒng)主動(dòng)頻率偏移(AFD)法引起的諧波,基于分析結(jié)果,得出了傳統(tǒng)AFD法引起的3、5、7次諧波電流的公式。通過(guò)引入與上述諧波電流相位相反的電流,對(duì)諧波進(jìn)行補(bǔ)償。給出了所提帶諧波補(bǔ)償功能的AFD法在數(shù)字化控制系統(tǒng)中的實(shí)現(xiàn)方法。仿真和實(shí)驗(yàn)結(jié)果表明,所提方法有效地減少了系統(tǒng)中的諧波電流,同時(shí)不影響孤島檢測(cè)。
[Abstract]:Firstly, the harmonic caused by the traditional active frequency offset (AFD) method for islanding detection is analyzed by using the fast Fourier transform. Based on the analysis results, the formula of the 3 ~ 5 ~ (th) th harmonic current caused by the traditional AFD method is obtained. The harmonic is compensated by introducing a current opposite to the phase of the harmonic current mentioned above. The implementation of the proposed AFD method with harmonic compensation in digital control system is presented. Simulation and experimental results show that the proposed method can effectively reduce the harmonic current in the system without affecting the islanding detection.
【作者單位】： 福州大學(xué)電氣工程與自動(dòng)化學(xué)院;漳州科華技術(shù)有限責(zé)任公司博士后工作站;
【基金】：福建省自然科學(xué)基金資助項(xiàng)目(2012J01257,2013-J01178)~~
【分類號(hào)】：TM711

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本文編號(hào)：2210831