本文選題：多變流器并聯(lián)　切入點：LCL濾波器　出處：《中國電機(jī)工程學(xué)報》2017年05期 　論文類型：期刊論文

【摘要】：LCL型變流器多模塊并聯(lián)并網(wǎng)運行時系統(tǒng)網(wǎng)絡(luò)阻抗及諧振特性會發(fā)生變化,這將無法保證變流器輸出電流的控制特性。對輸出電流諧振問題進(jìn)行定量分析及諧振抑制方法研究非常關(guān)鍵。通過建立多變流器并聯(lián)并網(wǎng)系統(tǒng)的諾頓等效電路模型,對諧振峰分布進(jìn)行定量分析,進(jìn)而在簡化模型的基礎(chǔ)上,得到了諧振頻率的數(shù)學(xué)表達(dá)式�；陔娙萜鞑⒙�(lián)虛擬電阻的阻尼方法,研究虛擬電阻取值對輸出電流的影響,提出了虛擬電阻最優(yōu)值的計算方法。該方法可保證多變流器并聯(lián)并網(wǎng)系統(tǒng)輸出電流對指令值的跟蹤特性。仿真和實驗結(jié)果證明了定量分析結(jié)果的準(zhǔn)確性及虛擬電阻取值方法的有效性,實現(xiàn)了對輸出電流的有效控制。
[Abstract]:The network impedance and resonance characteristics of LCL converters will change when they are connected in parallel. This will not guarantee the control characteristics of the output current of the converter. The quantitative analysis of the output current resonance and the research of the resonant suppression method are very important. The Norton equivalent circuit model of the parallel grid-connected multi-converter system is established. Based on the quantitative analysis of the distribution of the resonant peak, the mathematical expression of the resonant frequency is obtained on the basis of the simplified model. Based on the damping method of the capacitor parallel virtual resistance, the effect of the virtual resistance value on the output current is studied. A method for calculating the optimal value of virtual resistance is presented. The method can guarantee the tracking characteristic of output current of parallel grid-connected multi-converter system to the command value. The simulation and experimental results prove the accuracy of quantitative analysis results and virtual electricity. The effectiveness of the blocking method, The effective control of output current is realized.
【作者單位】： 電力設(shè)備電氣絕緣國家重點實驗室(西安交通大學(xué));西安愛科賽博電氣股份有限公司;
【基金】：國家自然科學(xué)基金項目(51207126) 新世紀(jì)優(yōu)秀人才支持計劃資助(NCET-12-0450)~~
【分類號】：TM46
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本文編號：1604583