本文選題：有源電力濾波器 + LCL濾波器　； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：以電力電子裝置為代表的非線性負載已成為人們生產(chǎn)、生活中必不可少的部分,其大量應(yīng)用使得電網(wǎng)諧波污染日趨嚴重。有源電力濾波器(Active Power Filter,APF)具有補償精度高、響應(yīng)快、功能靈活、不易受電網(wǎng)影響等優(yōu)點,在電能質(zhì)量標(biāo)準的要求和市場需求的推動下,采用有源電力濾波器治理諧波必將成為電能質(zhì)量治理的重要發(fā)展方向之一。論文以基于LCL濾波器的三相三線并聯(lián)型APF為研究對象,對其主電路參數(shù)和控制策略從以下方面進行了研究:首先,研究了 LCL濾波器諧振原理,指出在LCL濾波器傳遞函數(shù)中引入阻尼項是一種理想的諧振阻尼方法。從傳遞函數(shù)的角度研究了濾波電容串聯(lián)電阻和并聯(lián)電阻的無源阻尼法,揭示了其阻尼本質(zhì)是引入了阻尼項,而并聯(lián)電阻的方式由于只引入了阻尼項,是一種理想的阻尼形式。從配置阻尼項的角度研究了四種狀態(tài)變量反饋的有源阻尼法的可行性,指出了濾波電容電流比例反饋是最佳的方法。其次,建立了APF在三相靜止abc坐標(biāo)系、兩相靜止αβ坐標(biāo)系和兩相旋轉(zhuǎn)dq坐標(biāo)系下的數(shù)學(xué)模型。分析了 APF穩(wěn)態(tài)工作時的能量交換形式和功率流動關(guān)系,給出了基于能量波動的直流母線電容參數(shù)設(shè)計方法。研究了APF補償目標(biāo)和LCL濾波器頻率特性,提出了一種適用于APF的LCL濾波器參數(shù)設(shè)計方法。然后,從工程應(yīng)用角度對基于時域的i_p-i_q法和基于頻域的滑窗迭代DFT法這兩種最常用的諧波檢測方法進行了原理闡述和對比分析,指出滑窗迭代DFT法實用性更強。設(shè)計了直流母線電壓控制器和軟啟動策略�；谌囔o止坐標(biāo)系推導(dǎo)了并網(wǎng)電流外環(huán)、濾波電容電流內(nèi)環(huán)的電流雙環(huán)數(shù)學(xué)模型,設(shè)計了電流控制器、電容電流反饋參數(shù)及電網(wǎng)電壓前饋策略。最后,搭建了基于Matlab的仿真模型和基于TMS320F28335DSP的實驗平臺,對論文設(shè)計的主電路參數(shù)和控制策略進行仿真和實驗,仿真與實驗結(jié)果一致,驗證了主電路參數(shù)和控制策略設(shè)計的有效性,同時也驗證了 LCL濾波器在APF應(yīng)用中的可行性以及相對L濾波器的優(yōu)越性。
[Abstract]:The nonlinear load represented by power electronic devices has become an indispensable part of people's production and life. A large number of applications make the harmonic pollution of power grid become more and more serious.Active Power filter (APF) has the advantages of high compensation accuracy, fast response, flexible function and not easily affected by power network.Active power filter (APF) will become one of the important development directions of power quality control.The main circuit parameters and control strategies of three-phase three-wire parallel APF based on LCL filter are studied in the following aspects: firstly, the resonant principle of LCL filter is studied.It is pointed out that the introduction of damping term into the transfer function of LCL filter is an ideal resonant damping method.The passive damping method of filter capacitor series resistance and parallel resistance is studied from the point of view of transfer function. It is revealed that the damping is essentially a damping term, but the parallel resistance is an ideal damping form because only the damping term is introduced.The feasibility of active damping method with four state variables feedback is studied from the point of view of collocation of damping term. It is pointed out that filtering capacitive current proportional feedback is the best method.Secondly, the mathematical models of APF in three-phase stationary abc coordinate system, two-phase stationary 偽 尾 coordinate system and two-phase rotating DQ coordinate system are established.This paper analyzes the energy exchange form and power flow relationship of APF in steady state operation, and gives a design method of DC bus capacitance parameters based on energy fluctuation.The APF compensation target and the frequency characteristics of LCL filter are studied, and a design method of LCL filter parameters suitable for APF is proposed.Then, from the point of view of engineering application, the principle of i_p-i_q method based on time domain and sliding window iterative DFT method based on frequency domain are expounded and compared. It is pointed out that the sliding window iterative DFT method is more practical.DC bus voltage controller and soft start strategy are designed.Based on the three-phase static coordinate system, the mathematical model of current double loop of grid-connected outer loop and filtered capacitor current inner loop is derived, and the current controller, capacitive current feedback parameters and voltage feedforward strategy are designed.Finally, the simulation model based on Matlab and the experimental platform based on TMS320F28335DSP are built. The main circuit parameters and control strategy designed in this paper are simulated and experimented. The simulation results are consistent with the experimental results.The effectiveness of the design of the main circuit parameters and the control strategy is verified, and the feasibility of the LCL filter in the application of APF and its superiority over the L filter are also verified.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM761

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