本文選題：光伏并網(wǎng)逆變器　切入點(diǎn)：不對稱電網(wǎng)電壓　出處：《太陽能學(xué)報》2017年10期 　論文類型：期刊論文

【摘要】：光伏并網(wǎng)逆變器直接功率控制系統(tǒng)的兩相靜止坐標(biāo)系模型無需旋轉(zhuǎn)變換就可以實(shí)現(xiàn)無鎖相環(huán)運(yùn)行。但系統(tǒng)相關(guān)變量為交流量,采用比例積分(PI)控制不能實(shí)現(xiàn)無靜差調(diào)節(jié)。并且在不對稱電網(wǎng)電壓的情況下,不能同時實(shí)現(xiàn)系統(tǒng)輸出功率和網(wǎng)測電流質(zhì)量的控制。針對上述問題提出一種協(xié)調(diào)自抗擾直接功率控制的設(shè)計(jì)方法,無需對網(wǎng)側(cè)電流的正負(fù)序分量和電網(wǎng)電壓負(fù)序分量進(jìn)行提取,能夠簡化系統(tǒng)控制結(jié)構(gòu),提高魯棒性。其中,為了避免電網(wǎng)頻率變化影響,電網(wǎng)電壓的正序分量分離采用自適應(yīng)陷波濾波器技術(shù)。為了網(wǎng)側(cè)電流和瞬時功率的協(xié)調(diào)控制,在自抗擾直接功率控制策略基礎(chǔ)上,功率給定值采用加權(quán)的方法來獲得。最后借助Matlab/Simulink對該文所提出的策略進(jìn)行仿真,驗(yàn)證所提控制算法的有效性和可行性。
[Abstract]:The two-phase stationary coordinate system of direct power control system of grid-connected photovoltaic inverter can run without phase-locked loop without rotation transformation. Using proportional integral PI) control can not realize the regulation of no static error, and in the case of asymmetric network voltage, The output power of the system and the quality control of the network current can not be controlled simultaneously. In view of the above problems, a design method of coordinated ADRC direct power control is proposed, without the need to extract the positive and negative sequence components of the grid side current and the negative sequence component of the grid voltage. It can simplify the control structure and improve robustness. In order to avoid the influence of frequency variation, adaptive notch filter technique is used to separate the positive sequence components of the grid voltage. On the basis of ADRC direct power control strategy, the given power value is obtained by weighted method. Finally, the proposed strategy is simulated by Matlab/Simulink to verify the effectiveness and feasibility of the proposed control algorithm.
【作者單位】： 天津內(nèi)燃機(jī)研究所;天津大學(xué)電氣與自動化工程學(xué)院;
【分類號】：TM464;TM615

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本文編號：1590638