本文選題：輸入輸出線性化 + 非線性控制　； 參考：《廣西大學(xué)》2017年碩士論文

【摘要】：隨著電力電子功率變換技術(shù)的快速發(fā)展,越來(lái)越多的電力電子裝置廣泛應(yīng)用于生活家用電器、微電網(wǎng)、軌道交通牽引變流器、航空航天電源系統(tǒng)與航母電磁彈射等軍工領(lǐng)域。其中有很大一部分電力電子裝置都通過(guò)整流器與電力網(wǎng)接口,由二極管組成的整流器為一種非線性的裝置。電網(wǎng)的電能通過(guò)整流器后其電流會(huì)嚴(yán)重畸變對(duì)電網(wǎng)造成諧波污染,因此如何抑制電力電子裝置產(chǎn)生較大的諧波越來(lái)越成為各國(guó)學(xué)者研究的熱點(diǎn)。目前最為有效的方法為有源功率因數(shù)校正技術(shù),研究主要集中在校正變換器的拓?fù)浣Y(jié)構(gòu)與校正控制策略兩個(gè)方面。本文的校正拓?fù)洳捎脗鹘y(tǒng)的Boost變換器,研究重點(diǎn)在于其控制算法方面�；陔p閉環(huán)PI的傳統(tǒng)功率因數(shù)校正控制策由于是一種針對(duì)目標(biāo)的反饋控制而忽略了變換器模型中的一些因素,因此其在穩(wěn)態(tài)時(shí)控制效果還是不錯(cuò),但是在負(fù)載突變或者是有擾動(dòng)時(shí)其動(dòng)態(tài)響應(yīng)速度較慢,而且起機(jī)的電流尖峰很大�；谏鲜隹刂撇呗缘牟蛔�,本文采用了一種基于輸入輸出線性化的非線性控制算法,其不是通過(guò)在平衡點(diǎn)附近進(jìn)行泰勒級(jí)數(shù)展開(kāi)近似線性化再用經(jīng)典控制理論設(shè)計(jì)控制器,而是將原非線性控制系統(tǒng)模型通過(guò)適當(dāng)?shù)姆蔷�性坐標(biāo)變換與狀態(tài)反饋轉(zhuǎn)換至新的坐標(biāo)空間中的線性系統(tǒng),再通過(guò)經(jīng)典控制理論設(shè)計(jì)控制器,最后通過(guò)新坐標(biāo)空間與原坐標(biāo)空間的關(guān)系推導(dǎo)出原坐標(biāo)空間的控制律表達(dá)式,這種方法沒(méi)有丟失原非線性系統(tǒng)的任何信息,因此成為各國(guó)學(xué)者研究的焦點(diǎn)。本文將輸入輸出線性化方法應(yīng)用在了功率因數(shù)校正Boost變換器上,分別設(shè)計(jì)推導(dǎo)出了恒功率輸出的PFC控制器與恒壓輸出的PFC控制器,并且經(jīng)過(guò)推導(dǎo),該方法也可以應(yīng)用在雙管正激變換器上。本文采用專業(yè)電力電子仿真軟件PSIM對(duì)上述推導(dǎo)的控制算法進(jìn)行仿真驗(yàn)證,通過(guò)分析仿真波形可以看出基于輸入輸出線性化方法的功率因數(shù)校正控制策略具有快速的動(dòng)態(tài)響應(yīng)速度且起機(jī)尖峰電流小的特點(diǎn)。本文通過(guò)第五、六兩章硬件與軟件設(shè)計(jì)的介紹,研制了一臺(tái)300W的兩級(jí)式DC/DC變換器,前級(jí)為功率因數(shù)校正Boost源變換器,后級(jí)為雙管正激負(fù)載變換器。通過(guò)在實(shí)驗(yàn)平臺(tái)上的調(diào)試與測(cè)試,獲得了與仿真波形相對(duì)應(yīng)的實(shí)驗(yàn)波形,進(jìn)一步驗(yàn)證了本文所研究的基于輸入輸出線性化方法控制策略具有較快的動(dòng)態(tài)響應(yīng)能力,抗擾動(dòng)能力強(qiáng)的特點(diǎn)。
[Abstract]:With the rapid development of power electronic power conversion technology, more and more power electronic devices are widely used in the military fields such as household appliances, microgrid, rail transit traction converter, aerospace power system and aircraft carrier electromagnetic ejection. A large part of the power electronic devices are connected to the power grid through rectifier. The rectifier composed of diodes is a nonlinear device. After the electric energy of the power grid passes through the rectifier, its current distortion will cause harmonic pollution to the power grid. Therefore, how to restrain the power electronic devices from producing larger harmonics has become a hot research topic of scholars all over the world. At present, the most effective method is active Power Factor Correction (APFC) technology, which is mainly focused on the topology of the rectified converter and the correction control strategy. Traditional Boost converter is used to correct the topology in this paper. The research focus is on its control algorithm. Because the traditional PFC control strategy based on double closed loop Pi is a kind of feedback control for the target, it ignores some factors in the converter model, so it has a good control effect in steady state. However, the dynamic response speed is slow and the current spike is very large when the load is abrupt or disturbed. In this paper, a nonlinear control algorithm based on input and output linearization is proposed, which is not based on the Taylor series expansion near the equilibrium point and then uses classical control theory to design the controller. Instead, the original nonlinear control system model is transformed into the linear system in the new coordinate space by proper nonlinear coordinate transformation and state feedback, and the controller is designed by classical control theory. Finally, through the relation between the new coordinate space and the original coordinate space, the expression of the control law of the original coordinate space is derived. This method has not lost any information of the original nonlinear system, so it has become the focus of the scholars in the world. In this paper, the input and output linearization method is applied to the power factor correction (Boost) converter. The constant power output PFC controller and the constant voltage output PFC controller are designed and deduced, respectively. This method can also be applied to two-transistor forward converters. In this paper, the power electronic simulation software PSIM is used to verify the proposed control algorithm. By analyzing the simulation waveform, it can be seen that the power factor correction control strategy based on input and output linearization has the characteristics of fast dynamic response speed and small peak current. Through the introduction of hardware and software design in the fifth and sixth chapters, a 300W two-stage DC/DC converter with power factor correction (PFC) Boost source converter and two-transistor forward load converter is developed in this paper. Through debugging and testing on the experimental platform, the corresponding experimental waveform is obtained, which further verifies the fast dynamic response ability of the control strategy based on the input and output linearization method studied in this paper. Strong ability to resist disturbance.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

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