【摘要】：因網(wǎng)側(cè)電流正弦化、功率因數(shù)可調(diào)以及能量雙向流動等優(yōu)勢，雙PWM變換器在電力特別是在永磁同步電機（PMSM）調(diào)速領(lǐng)域中，有著廣闊的發(fā)展前景和研究價值。本課題主要研究內(nèi)容及創(chuàng)新點如下： 1）根據(jù)瞬時無功功率理論，在兩相靜止坐標(biāo)系下建立雙PWM變換器網(wǎng)側(cè)整流器離散化數(shù)學(xué)模型。在此基礎(chǔ)上提出一種瞬時功率預(yù)測電流控制（IP-PCC）算法，改善傳統(tǒng)PCC算法存在的穩(wěn)態(tài)誤差問題，并降低對結(jié)構(gòu)參數(shù)變化的敏感程度。設(shè)定瞬時無功功率指令值為零以滿足系統(tǒng)單位功率因數(shù)運行要求。據(jù)單個采樣周期內(nèi)瞬時功率跟蹤誤差平方和設(shè)定價值函數(shù)。通過滿足固定時間周期內(nèi)價值函數(shù)最小為原則，預(yù)測下一采樣時刻電網(wǎng)電流分量。同時，將虛擬磁鏈變量引入IP-PCC算法，針對純積分運算存在的積分初值和直流偏置問題，提出一種帶有補償量的改進型一階低通濾波器（FOLP）進行虛擬磁鏈估計,以期實現(xiàn)PWM整流器IP-PCC無電壓傳感器控制。 2）根據(jù)靜止坐標(biāo)系以及以轉(zhuǎn)子磁鏈和定子磁鏈為基準(zhǔn)的兩種旋轉(zhuǎn)坐標(biāo)系下各變量關(guān)系，借助矢量控制解耦思想，利用定子電流及定子磁鏈分量建立逆變器瞬時功率數(shù)學(xué)模型，從而提出雙PWM變換器電機側(cè)逆變器瞬時功率預(yù)測控制（PIPC）算法，提高系統(tǒng)功率因數(shù)。以PMSM定子磁鏈幅值恒定為原則計算瞬時有功功率指令值，，并根據(jù)功率跟蹤誤差選擇逆變器期望開關(guān)電壓。推導(dǎo)PMSM調(diào)速系統(tǒng)能觀性條件，并將離散滑模觀測器（D-SMO）及高頻旋轉(zhuǎn)電壓信號注入法分別引入PIPC算法中，以期實現(xiàn)全速度范圍內(nèi)逆變器PIPC無位置傳感器控制。 3）針對雙PWM變換器功率流動情況，根據(jù)PIPC算法結(jié)構(gòu)，將PIPC算法中瞬時有功功率預(yù)測值直接作為雙PWM變換器負載功率變量，采用負載功率前饋控制實現(xiàn)PWM整流器IP-PCC結(jié)構(gòu)和PWM逆變器PIPC算法的協(xié)調(diào)。無需單獨進行負載功率觀測，以期實現(xiàn)雙PWM變換器協(xié)調(diào)控制。 在理論和仿真分析基礎(chǔ)上，搭建雙PWM變換器電機調(diào)速系統(tǒng)實驗平臺。從軟硬件兩方面設(shè)計網(wǎng)側(cè)PWM整流器IP-PCC實驗、電機側(cè)PWM逆變器PIPC實驗以及雙PWM變換器負載功率前饋協(xié)調(diào)控制實驗，并進行在線調(diào)試，驗證所提相關(guān)理論有效性和可行性。
[Abstract]:Due to the advantages of sinusoidal current, adjustable power factor and bidirectional energy flow, double PWM converters have a broad prospect and research value in power, especially in the field of permanent magnet synchronous motor (PMSM) (PMSM) speed regulation. The main contents and innovations of this paper are as follows: 1) based on the instantaneous reactive power theory, a discretization mathematical model of grid-side rectifier of double PWM converter is established in two-phase stationary coordinate system. On this basis, a transient power predictive current control (IP-PCC) algorithm is proposed to improve the steady-state error of the traditional PCC algorithm and reduce the sensitivity to structural parameters. The instantaneous reactive power instruction value is set to zero to meet the operational requirement of unit power factor of the system. According to the sum of the square of instantaneous power tracking error in a single sampling period, the value function is set. By satisfying the principle of minimum value function in a fixed time period, the current component of the power network at the next sampling time is predicted. At the same time, the virtual flux variable is introduced into IP-PCC algorithm. Aiming at the problem of integral initial value and DC bias in pure integral operation, an improved first-order low-pass filter (FOLP) with compensation is proposed to estimate the virtual flux. In order to achieve PWM rectifier IP-PCC voltage sensorless control. 2) according to the relations of variables in static coordinate system and two kinds of rotating coordinate system based on rotor flux and stator flux, the instantaneous power mathematical model of inverter is established by using stator current and stator flux component with vector control decoupling idea. In order to improve the power factor of the system, the (PIPC) algorithm of instantaneous power predictive control for the motor side inverter of dual PWM converter is proposed. The instantaneous active power instruction value is calculated on the principle of constant amplitude of PMSM stator flux, and the expected switching voltage of inverter is selected according to the power tracking error. The observability condition of PMSM speed regulating system is deduced, and the discrete sliding mode observer (D-SMO) and the high frequency rotation voltage signal injection method are introduced into the PIPC algorithm, respectively, in order to realize the PIPC sensorless control of inverter in full speed range. 3) according to the structure of the PIPC algorithm, the instantaneous active power prediction value in the PIPC algorithm is taken directly as the load power variable of the double PWM converter, according to the power flow situation of the dual PWM converter. The IP-PCC structure of the PWM rectifier and the PIPC algorithm of the PWM inverter are coordinated by the load power feedforward control. It is not necessary to observe the load power separately in order to realize the coordinated control of double PWM converters. On the basis of theory and simulation analysis, the experiment platform of motor speed regulation system of double PWM converter is built. The IP-PCC experiment of the PWM rectifier on the network side, the PIPC experiment of the PWM inverter on the motor side and the coordinated control experiment of the load power feedforward of the double PWM converter are designed from two aspects of hardware and software, and the on-line debugging is carried out to verify the validity and feasibility of the proposed theory.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM46

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本文編號：2391251