基于d,q坐標(biāo)系的微電網(wǎng)電壓不平衡研究
發(fā)布時(shí)間:2018-11-23 14:35
【摘要】:由于分布式電源所接負(fù)載的不對(duì)稱,使得分布式電源的電壓質(zhì)量受到嚴(yán)重影響。故在此提出一種電壓質(zhì)量控制策略,對(duì)分布式電源輸出電壓進(jìn)行不平衡補(bǔ)償,該方法通過(guò)信號(hào)延遲法對(duì)不平衡信號(hào)進(jìn)行正負(fù)序提取;采用加虛擬阻抗的下垂控制器實(shí)現(xiàn)分布式電源的功率均分;利用d,q坐標(biāo)系下的不平衡補(bǔ)償控制器,實(shí)現(xiàn)電壓的自動(dòng)補(bǔ)償穩(wěn)定;通過(guò)電壓電流雙環(huán)控制,進(jìn)一步實(shí)現(xiàn)控制參數(shù)的跟蹤和實(shí)時(shí)修正,從而提升整個(gè)控制系統(tǒng)的性能。最后通過(guò)仿真實(shí)驗(yàn)結(jié)果證明了所提控制策略的有效性。
[Abstract]:Because of the asymmetry of the load, the voltage quality of the distributed power supply is seriously affected. In this paper, a voltage quality control strategy is proposed to compensate the unbalanced output voltage of the distributed power supply. The method extracts the unbalanced signal from positive and negative sequence by the method of signal delay. The droop controller with virtual impedance is used to realize the average power distribution of the distributed power supply, and the unbalanced compensation controller in the dq coordinate system is used to realize the automatic compensation and stability of the voltage. Through the double loop control of voltage and current, the tracking and real time correction of control parameters are further realized, thus improving the performance of the whole control system. Finally, the simulation results show the effectiveness of the proposed control strategy.
【作者單位】: 隴東學(xué)院電氣工程學(xué)院;
【基金】:甘肅省高等學(xué)?蒲许(xiàng)目(2016B-102) 隴東學(xué)院青年科技創(chuàng)新項(xiàng)目(XYBY140207)~~
【分類號(hào)】:TM727
[Abstract]:Because of the asymmetry of the load, the voltage quality of the distributed power supply is seriously affected. In this paper, a voltage quality control strategy is proposed to compensate the unbalanced output voltage of the distributed power supply. The method extracts the unbalanced signal from positive and negative sequence by the method of signal delay. The droop controller with virtual impedance is used to realize the average power distribution of the distributed power supply, and the unbalanced compensation controller in the dq coordinate system is used to realize the automatic compensation and stability of the voltage. Through the double loop control of voltage and current, the tracking and real time correction of control parameters are further realized, thus improving the performance of the whole control system. Finally, the simulation results show the effectiveness of the proposed control strategy.
【作者單位】: 隴東學(xué)院電氣工程學(xué)院;
【基金】:甘肅省高等學(xué)?蒲许(xiàng)目(2016B-102) 隴東學(xué)院青年科技創(chuàng)新項(xiàng)目(XYBY140207)~~
【分類號(hào)】:TM727
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