含非線性和不平衡負(fù)載的分布式電源并網(wǎng)逆變器控制策略研究

針對(duì)帶LCL 濾波的并網(wǎng)電壓源型逆變器提出了一種多環(huán)控制器。該控制器由內(nèi)環(huán)
預(yù)測(cè)電流控制器、外環(huán)電壓矢量控制器及電壓指令補(bǔ)償器三部分組成。將該控制器應(yīng)用于微電網(wǎng)中微型電源的逆變器中，可以有效調(diào)節(jié)負(fù)載端電壓，尤其是當(dāng)系統(tǒng)中含不平衡和非線性負(fù)載時(shí)，均可以實(shí)現(xiàn)零靜態(tài)誤差。最后，給出了分布式電源單獨(dú)運(yùn)行和聯(lián)網(wǎng)運(yùn)行時(shí)的帶平衡、不平衡及非線性負(fù)載時(shí)的仿真分析。
Abstract: A multi-loop controller for gird-connected voltage source converters with LCL
filter is proposed in this paper. The controller consists of three segments – inner predictive current controller, outer voltage vector controller, and the command voltage modifier. The whole controller is applied to converters based DRs in microgrids, and regulate the load terminal voltage with zero steady-state error even under load unbalanced conditions and conditions with non-linear loads. Selected results from simulation studies conducted on the performance of the controller
under balanced, unbalanced and non-linear conditions both in island and grid-connected mode are presented.
關(guān)鍵詞：微電網(wǎng)；逆變器；多環(huán)控制器；不平衡；非線性負(fù)載
Key words: mirogrids; converters; multi-loop controller; unbalanced condition; non-linear
loads