本文關(guān)鍵詞： 電能質(zhì)量 壓縮感知 匹配追蹤 自適應(yīng) 回溯算法　出處：《電子測(cè)量與儀器學(xué)報(bào)》2017年05期 　論文類型：期刊論文

【摘要】：為改善電能質(zhì)量暫穩(wěn)態(tài)信號(hào)重構(gòu)性能,提出了基于壓縮感知理論的回溯自適應(yīng)匹配追蹤的電能質(zhì)量信號(hào)重構(gòu)方法,對(duì)電能質(zhì)量信號(hào)進(jìn)行處理。在自適應(yīng)匹配追蹤的基礎(chǔ)上改變一個(gè)回溯步驟,初選出滿足條件的候選集,然后在終選步驟中利用回溯功能,剔除系數(shù)相對(duì)較小的原子,所以該方法能夠靈活地刪除一些被在初選時(shí)被錯(cuò)誤選擇的原子,有著更好的稀疏信號(hào)重構(gòu)和逼近性能。另外該方法無需先驗(yàn)信號(hào)的稀疏度,具有稀疏度自適應(yīng)能力。仿真實(shí)驗(yàn)結(jié)果表明,10種電能質(zhì)量信號(hào)的壓縮重構(gòu)精度都在97.63%以上,能量恢復(fù)系數(shù)要高于99.57%,信噪比高于31.42dB,均方誤差百分比在2.31%之內(nèi),都能達(dá)到很好的性能指標(biāo)。
[Abstract]:In order to improve the performance of power quality transient signal reconstruction, a power quality signal reconstruction method based on compression-sensing theory and traceback adaptive matching tracking is proposed. On the basis of adaptive matching tracking, the power quality signal is processed. A backtracking step is changed, the candidate set that meets the conditions is selected, and the backtracking function is used in the final selection step. With the elimination of atoms with relatively small coefficients, the method has the flexibility to remove some atoms that were wrongly selected in primary elections. This method has better sparse signal reconstruction and approximation performance. In addition, the method does not need the sparse degree of prior signal, and has the ability of self-adaptive sparsity. The simulation results show that. The compression and reconstruction accuracy of the 10 kinds of power quality signals are all above 97.63%, the energy recovery coefficient is higher than 99.577.The signal-to-noise ratio is higher than 31.42dB. The percentage of mean square error is within 2.31%, which can achieve good performance.
【作者單位】： 江蘇大學(xué)電氣信息工程學(xué)院;南瑞集團(tuán)公司國(guó)網(wǎng)電力科學(xué)研究院;
【基金】：國(guó)家自然科學(xué)基金(61301138) 江蘇省自然科學(xué)基金(BK20130501) 江蘇省博士后科研項(xiàng)目(1401053C) 江蘇大學(xué)高級(jí)人才啟動(dòng)基金(10JDG136)資助項(xiàng)目
【分類號(hào)】：TN911.7
【正文快照】： 1引言隨著現(xiàn)代科技水平的快速發(fā)展,國(guó)家對(duì)清潔能源的需求正在逐步擴(kuò)大。傳統(tǒng)能源如石油、煤炭、天然氣等都是一次不可再生能源[1]。面對(duì)氣候變化、資源短缺、結(jié)構(gòu)調(diào)整等因素,國(guó)家十二五計(jì)劃把大力發(fā)展水電、核電和其他可再生能源發(fā)電作為重要任務(wù),電能在能源體系中發(fā)揮著越來

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