本文選題：電勵(lì)磁同步電機(jī) + 自控變頻��； 參考：《哈爾濱工業(yè)大學(xué)》2014年博士論文

【摘要】：電勵(lì)磁同步電機(jī)具有功率因數(shù)可調(diào)、效率高等優(yōu)點(diǎn)，在工業(yè)大功率場(chǎng)合獲得了廣泛應(yīng)用。在諸多同步電機(jī)起動(dòng)方式中，自控變頻軟起動(dòng)方式是技術(shù)含量最高，性能最優(yōu)的起動(dòng)方式，是同步電機(jī)軟起動(dòng)技術(shù)的發(fā)展方向。它具有起動(dòng)電流較小，起動(dòng)轉(zhuǎn)矩可控，對(duì)電網(wǎng)幾乎沒有附加要求等優(yōu)點(diǎn)。目前，國(guó)內(nèi)大功率電動(dòng)機(jī)軟起動(dòng)裝置主要還是依靠進(jìn)口，尤其是變頻軟起動(dòng)器，國(guó)內(nèi)目前還沒有形成完善的應(yīng)用性產(chǎn)品，因此研究自控變頻方式同步電機(jī)軟起動(dòng)裝置具有重要的經(jīng)濟(jì)意義和戰(zhàn)略意義。大功率同步電動(dòng)機(jī)的起動(dòng)及并網(wǎng)困難成為其應(yīng)用的重大阻礙，是限制產(chǎn)業(yè)發(fā)展的重大技術(shù)難題，本文針對(duì)自控變頻式同步電動(dòng)機(jī)起動(dòng)系統(tǒng)中存在的問題進(jìn)行了理論分析和實(shí)踐研究，主要研究?jī)?nèi)容如下： 針對(duì)同步電動(dòng)機(jī)無位置傳感器起動(dòng)方法，本文采用自給脈沖起動(dòng)與電氣轉(zhuǎn)子位置檢測(cè)相結(jié)合的方法實(shí)現(xiàn)了同步電動(dòng)機(jī)無位置傳感器起動(dòng)。通過突加、突減勵(lì)磁的方法檢測(cè)靜止轉(zhuǎn)子位置，轉(zhuǎn)速在中高速時(shí)用電氣式的方法實(shí)現(xiàn)轉(zhuǎn)子位置檢測(cè)，通過電機(jī)慣量辨識(shí)計(jì)算出自給脈沖的加速頻率，并用自給脈沖的方式實(shí)現(xiàn)了電機(jī)從靜止到中高速起動(dòng)的過渡，實(shí)現(xiàn)了全程無位置傳感器的起動(dòng)。 針對(duì)自給脈沖方法在低速起動(dòng)過程中存在轉(zhuǎn)子脈動(dòng)等問題，研究了基于高頻注入的轉(zhuǎn)子位置檢測(cè)方法。根據(jù)電勵(lì)磁同步電機(jī)的特點(diǎn)，向勵(lì)磁注入高頻電壓信號(hào)，產(chǎn)生高頻勵(lì)磁電流，之后采集耦合在定子上具有轉(zhuǎn)子位置信息的高頻電壓信號(hào)，經(jīng)過濾波及坐標(biāo)變換提取有效轉(zhuǎn)子位置信息，最后采用鎖相環(huán)算法鎖定轉(zhuǎn)子位置。在晶閘管傳動(dòng)系統(tǒng)中，當(dāng)電流換相時(shí)，電機(jī)反電動(dòng)勢(shì)的畸變比較嚴(yán)重，檢測(cè)端電壓將含有大量的高次諧波，準(zhǔn)確提取有效的高頻信號(hào)非常困難。因此本文提出了基于高頻注入電壓預(yù)估的同步電機(jī)轉(zhuǎn)子位置檢測(cè)方法。在換相時(shí)刻采用預(yù)估電壓作為鎖相環(huán)的給定信號(hào)，防止換向畸變的高頻諧波進(jìn)入到鎖相環(huán)。實(shí)驗(yàn)結(jié)果證明，加入電壓預(yù)估后，，有效地避免了換相電壓畸變對(duì)轉(zhuǎn)子位置檢測(cè)產(chǎn)生的不利影響，提高了高頻注入轉(zhuǎn)子位置檢測(cè)的精度和可靠性。 并網(wǎng)是自控變頻式同步電機(jī)軟起動(dòng)系統(tǒng)中非常關(guān)鍵的技術(shù)性問題。本文針對(duì)大功率以及大慣量系統(tǒng)，研究了準(zhǔn)同期并網(wǎng)策略。分析了雙閉環(huán)調(diào)速系統(tǒng)中，在電流環(huán)動(dòng)態(tài)特性非理想條件下，采用速度PI控制器引起的相角滑差不穩(wěn)定問題，進(jìn)而，本文提出了一種自適應(yīng)復(fù)合速度控制方法。在升速階段采用單比例自適應(yīng)速度控制算法，克服了傳統(tǒng)比例控制器無法消除靜差的困難；在準(zhǔn)同期階段，采用了基于相角滑差的準(zhǔn)同期控制算法，解決了滑差不穩(wěn)定的問題，并給出了可靠的并網(wǎng)判決策略。 針對(duì)自控變頻軟起動(dòng)裝置高壓系統(tǒng)的設(shè)計(jì)及實(shí)現(xiàn)，本文介紹了控制系統(tǒng)的軟、硬件設(shè)計(jì)方法。首先針對(duì)起動(dòng)過程中，電機(jī)端電壓檢測(cè)存在的隔離、相移及諧波等問題，提出了詳細(xì)的電壓檢測(cè)方案。介紹了對(duì)晶閘管閥組、平波電抗器、進(jìn)線電抗器的設(shè)計(jì)方法，設(shè)計(jì)了基于電流源的同步隔離觸發(fā)裝置，解決了高壓串聯(lián)晶閘管同步觸發(fā)和高低壓隔離問題。通過實(shí)驗(yàn)結(jié)果提出了不同主電路結(jié)構(gòu)的適用場(chǎng)合。
[Abstract]:With the advantages of adjustable power factor and high efficiency, the electric excitation synchronous motor has been widely used in industrial high-power situations. In the starting mode of many synchronous motors, the self controlled frequency conversion soft starting mode is the most technical content, the best starting mode, and the development direction of the synchronous motor soft starting technology. It has a small starting current. At present, the domestic high power motor soft starter is mainly dependent on the import, especially the variable frequency soft starter. At present, the domestic soft starter has not formed a perfect application product at home. Therefore, it is of great economic significance to study the soft starting device of the synchronous motor with self controlled frequency conversion. The difficulty of the starting and grid connection of high power synchronous motor has become a major obstacle to its application, and it is a major technical problem to restrict the development of the industry. In this paper, the theoretical analysis and practical research are carried out on the problems in the starting system of the self controlled frequency conversion synchronous motor. The main contents are as follows:
Aiming at the starting method of sensorless synchronous motor, this paper realizes the starting of the synchronous motor without position sensor with the method of self feeding pulse starting and electric rotor position detection. The position of the static rotor is detected by the sudden addition and the reduction of excitation, and the rotor position detection is realized by the electric method when the speed is in the middle and high speed. The acceleration frequency of the pulse is calculated by the inertia of the motor, and the transition from static to middle speed is realized by the way of self supply pulse, and the starting of the whole distance sensorless is realized.
Aiming at the problem of rotor pulsation in low speed starting process, the method of rotor position detection based on high frequency injection is studied. According to the characteristics of the synchronous motor, high frequency voltage signal is injected into the excitation, high frequency excitation current is produced, and then high frequency voltage signal with rotor position information on the stator is collected. By filtering and coordinate transformation, the effective rotor position information is extracted. Finally, the phase locked loop algorithm is used to lock the rotor position. In the thyristor transmission system, when the current is changed, the distortion of the motor back EMF is more serious. The detection terminal voltage will contain a large number of high order harmonics, so the accurate extraction of the effective high frequency signal is very difficult. Therefore, this paper is very difficult to accurately extract the effective high frequency signal. A method for detecting the rotor position of a synchronous motor based on high frequency injection voltage is proposed. In the commutation time, the estimated voltage is used as a given signal of the phase-locked loop to prevent the high frequency harmonics from the commutation distortion into the phase-locked loop. The experimental results show that the phase change of the commutation voltage can be avoided effectively after the voltage prediction is added. The adverse effect has improved the accuracy and reliability of high frequency injection rotor position detection.
Grid connection is a very key technical problem in the soft starting system of self controlled inverter synchronous motor. In this paper, a quasi synchronization network strategy is studied for high power and large inertia systems. The problem of unstable phase angle slip instability caused by the speed PI controller is analyzed under the non ideal dynamic characteristics of the current loop in a double closed loop speed control system. In this paper, an adaptive compound velocity control method is proposed. A single proportional adaptive speed control algorithm is adopted at the stage of rising to overcome the difficulty of eliminating static difference by the traditional proportional controller. In the quasi synchronization phase, a quasi synchronization control algorithm based on the phase angle slip is adopted to solve the problem of the instability of the slip. Based on the grid decision strategy.
In view of the design and implementation of the high voltage system of self controlled variable frequency soft starting device, this paper introduces the soft and hardware design methods of the control system. Firstly, the detailed voltage detection scheme is proposed for the isolation, phase shift and harmonics of the motor terminal voltage detection in the starting process. It introduces the thyristor valve group, the flat wave reactor and the wire feed. A synchronous isolation trigger based on current source is designed to solve the problem of synchronous trigger and high and low voltage isolation of high voltage series thyristor. The application of different main circuit structures is put forward through experimental results.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM341

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李振然;基于遞推最小二乘算法和自適應(yīng)采樣的微機(jī)自動(dòng)準(zhǔn)同期[J];電工電能新技術(shù);1995年03期

2 邱亦慧,馬志源,詹瓊?cè)A;無位置傳感器開關(guān)磁阻電機(jī)的無反轉(zhuǎn)起動(dòng)研究[J];電工技術(shù)學(xué)報(bào);2001年02期

3 夏長(zhǎng)亮,楊曉軍,史婷娜,文德;基于擾動(dòng)觀測(cè)器的無刷直流電機(jī)無位置傳感器控制[J];電工技術(shù)學(xué)報(bào);2002年06期

4 杜海江,石新春;無換向器電機(jī)全程式轉(zhuǎn)子電氣位置檢測(cè)方法的分析與實(shí)現(xiàn)[J];電工技術(shù)學(xué)報(bào);2005年05期

5 夏長(zhǎng)亮;謝細(xì)明;史婷娜;田洋;;開關(guān)磁阻電機(jī)小波神經(jīng)網(wǎng)絡(luò)無位置傳感器控制[J];電工技術(shù)學(xué)報(bào);2008年07期

6 龔錦霞;解大;張延遲;;三相數(shù)字鎖相環(huán)的原理及性能[J];電工技術(shù)學(xué)報(bào);2009年10期

7 鄭澤東;李永東;Maurice Fadel;;采用Kalman濾波器進(jìn)行信號(hào)處理的高頻信號(hào)注入法在電動(dòng)機(jī)控制中的應(yīng)用[J];電工技術(shù)學(xué)報(bào);2010年02期

8 潘金華;;液態(tài)軟啟動(dòng)在大型同步電機(jī)中的應(yīng)用[J];電工技術(shù);2008年01期

9 周元鈞;蔡名飛;;改進(jìn)的永磁同步電機(jī)轉(zhuǎn)子初始位置檢測(cè)方法[J];電機(jī)與控制學(xué)報(bào);2010年03期

10 鄧先明;馬志勛;李新宇;王磊;;轉(zhuǎn)子注入高頻的同步電機(jī)無傳感器控制[J];電機(jī)與控制學(xué)報(bào);2010年10期

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