本文關(guān)鍵詞：不平衡及畸變電網(wǎng)下并網(wǎng)變流器的比例多諧振電流控制　出處：《電力自動(dòng)化設(shè)備》2017年11期 　論文類型：期刊論文

  更多相關(guān)文章： 不平衡及畸變電網(wǎng) 并網(wǎng)變流器 比例多諧振調(diào)節(jié)器 參數(shù)設(shè)計(jì) 根軌跡 離散域 電流控制

【摘要】：針對(duì)不平衡及畸變電網(wǎng)電壓影響并網(wǎng)變流器控制性能的問(wèn)題,采用比例多諧振調(diào)節(jié)器對(duì)變流器的電流環(huán)進(jìn)行控制。在建立兩相靜止坐標(biāo)系下變流器數(shù)學(xué)模型的基礎(chǔ)上,給出一種采用直流電壓外環(huán)、電流內(nèi)環(huán)的雙環(huán)控制結(jié)構(gòu),電流內(nèi)環(huán)選擇比例多諧振調(diào)節(jié)器實(shí)現(xiàn)了對(duì)基波電流的跟蹤和對(duì)畸變電網(wǎng)電壓擾動(dòng)的抑制。針對(duì)含有LCL型濾波器的變流器中濾波器以及比例多諧振調(diào)節(jié)器階數(shù)高、參數(shù)設(shè)計(jì)困難的問(wèn)題,基于離散域根軌跡分析,提出了比例多諧振調(diào)節(jié)器參數(shù)設(shè)計(jì)的方法。通過(guò)分析諧振調(diào)節(jié)器參數(shù)對(duì)系統(tǒng)閉環(huán)極點(diǎn)的影響,設(shè)計(jì)了電流環(huán)的控制參數(shù),該參數(shù)可使系統(tǒng)在濾波器及電網(wǎng)頻率變化時(shí)仍然具有較好的魯棒性。在RT-LAB硬件在環(huán)實(shí)驗(yàn)平臺(tái)上,驗(yàn)證了電流控制方法的可行性,以及所提比例多諧振調(diào)節(jié)器參數(shù)設(shè)計(jì)方法的正確性。
[Abstract]:The control performance of grid-connected converter is affected by unbalanced and distorted grid voltage. The proportional multi-resonance regulator is used to control the current loop of the converter. Based on the mathematical model of the converter in two-phase static coordinate system, a DC voltage outer loop is presented. Double loop control structure of current inner loop. The selection of proportional multi-resonance regulator in current inner loop realizes the tracking of fundamental current and the suppression of distortion grid voltage disturbance. The filter and the order of proportional multi-resonance regulator in converter with LCL filter are studied. High. Based on the root locus analysis in discrete domain, a method of parameter design for proportional multi-resonance regulator is proposed. The influence of resonant regulator parameters on the closed-loop pole of the system is analyzed. The control parameters of the current loop are designed, which can make the system robust when the filter and the power network frequency change. The RT-LAB hardware is on the loop experimental platform. The feasibility of the current control method and the correctness of the proposed method are verified.
【作者單位】： 上海交通大學(xué)風(fēng)力發(fā)電研究中心;
【基金】：臺(tái)達(dá)環(huán)境與教育基金會(huì)《電力電子科教發(fā)展計(jì)劃》資助項(xiàng)目(DREM2016005)~~
【分類號(hào)】：TM46
【正文快照】： 0引言 并網(wǎng)變流器作為連接新能源與電力系統(tǒng)的重要元件,具有輸出電流正弦度高、能量雙向流動(dòng)以及功率因數(shù)易于調(diào)節(jié)等優(yōu)點(diǎn),已被廣泛應(yīng)用于新能源發(fā)電、大規(guī)模儲(chǔ)能及柔性直流輸電等領(lǐng)域[1]。并網(wǎng)變流器通常采用基于電網(wǎng)電壓定向的矢量控制方式,然而隨著不平衡、非線性負(fù)載的大，

本文編號(hào)：1437643