本文選題：磁控飽和電抗器　切入點(diǎn)：電磁振動(dòng)　出處：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：磁控飽和電抗器在電力系統(tǒng)中起到無(wú)功功率補(bǔ)償?shù)淖饔?但其運(yùn)行時(shí)產(chǎn)生的振動(dòng)噪聲不僅給環(huán)境帶來(lái)不利影響,還會(huì)損害電抗器本體性能,影響整個(gè)電網(wǎng)運(yùn)行的穩(wěn)定性和高效性。為了能有效的降低電抗器鐵心產(chǎn)生的電磁振動(dòng)噪聲,本文從電抗器鐵心產(chǎn)生電磁振動(dòng)的根源對(duì)鐵心振動(dòng)噪聲進(jìn)行數(shù)值分析,即考慮疊片鐵心磁致伸縮效應(yīng)對(duì)其振動(dòng)的影響。磁控飽和電抗器通過(guò)控制繞組調(diào)節(jié)其飽和程度,改變鐵心磁導(dǎo)率實(shí)現(xiàn)電抗器無(wú)功功率的連續(xù)調(diào)節(jié)。但同時(shí)引入了偏磁問題,從而使電抗器振動(dòng)加劇。所以,研究磁控飽和電抗器在不同飽和狀態(tài)下考慮疊片鐵心磁致伸縮效應(yīng)引起的電磁振動(dòng)具有重要的理論和現(xiàn)實(shí)意義。同時(shí)本文考慮了電工硅鋼疊片的阻尼效應(yīng),分析了阻尼效應(yīng)對(duì)電抗器振動(dòng)的影響。本文主要研究?jī)?nèi)容如下:首先,為模擬不同飽和狀態(tài)下磁控飽和電抗器鐵心硅鋼片的磁特性,本文考慮了直流磁通對(duì)磁化曲線的影響,采用德國(guó)BROCKHAUS公司的Epstein700和磁致伸縮測(cè)量系統(tǒng)MST500,獲得了不同控制電流下的磁化特性曲線和磁致伸縮特性曲線,并將其處理成可用于數(shù)值計(jì)算的單值磁化特性曲線和磁致伸縮特性曲線。其次,基于麥克斯韋方程和彈性力學(xué)基本方程建立電抗器磁場(chǎng)和機(jī)械振動(dòng)的數(shù)值分析模型。應(yīng)用現(xiàn)有開源型多物理場(chǎng)耦合數(shù)值分析軟件COMSOL Multiphysics,建立考慮疊片鐵心磁致伸縮效應(yīng)和阻尼效應(yīng)的磁控飽和電抗器三維數(shù)值模型。阻尼效應(yīng)是通過(guò)計(jì)算電抗器鐵心的模態(tài)分布,確定阻尼耦合系數(shù)。然后將處理獲得的單值磁化特性曲線和磁致伸縮特性曲線耦合到數(shù)值分析軟件中。計(jì)算并分析不同控制電流下磁控飽和電抗器磁場(chǎng)、振動(dòng)等信號(hào)的分布及大小。最后,對(duì)數(shù)值分析的4.4kVar/220V磁控飽和電抗器樣機(jī)完成不同控制電流下電抗器振動(dòng)實(shí)驗(yàn),測(cè)量并分析不同控制電流下電抗器鐵心特殊點(diǎn)的振動(dòng)加速度大小,并與數(shù)值計(jì)算結(jié)果作對(duì)比分析。
[Abstract]:Magnetically controlled saturated reactor plays the function of the reactive power compensation in power system, but the vibration and noise when running, not only to the environment adversely affected, but also damage the reactor performance and stability of the power grid operation and high efficiency. In order to electromagnetic vibration and noise reduction reactor core effectively, the root the electromagnetic vibration from the reactor core to the core vibration noise is analyzed, which consider the effect of laminated core magnetostrictive effect on its vibration. The magnetically controlled saturated reactor by controlling the saturation degree of the regulating winding, continuously adjusting the permeability of core is changed to achieve reactive power reactor. But at the same time introduce bias, so that the vibration of the reactor intensified. Therefore, research on magnetically controlled saturated reactor under different saturated condition considering the electromagnetic vibration caused by laminated core magnetostrictive effect dynamic It has important theoretical and practical significance. At the same time considering the damping effect of silicon steel laminations, analyzes the influence of vibration damping effect on the reactor. The main research contents of this paper are as follows: firstly, to simulate different saturated magnetic properties of magnetically controlled saturated reactor core silicon steel sheet, considering the effect of DC magnetic flux on the magnetization curve using MST500, Epstein700 and magnetostriction measurement system of BROCKHAUS company of Germany, the magnetization curve and the magnetostrictive characteristic curve under different control current, and it can be used for processing into the number value of single valued magnetization characteristic curve and magnetostriction curve calculation. Secondly, the numerical analysis model of magnetic field and mechanical vibration to establish basic reactor the Maxwell equation and elastic mechanics. Based on the Multiphysics numerical analysis software COMSOL multiphysics coupling application of the existing open type A magnetron, a laminated core magnetostrictive effect and the damping effect of the saturable reactor is a three-dimensional numerical model considered. Damping effect is through the modal distribution calculation of reactor core, determine the damping coupling coefficient. Then single values obtained magnetization curve and magnetostrictive characteristic curve coupled to numerical analysis software. The analysis of different current control magnetically controlled saturated reactor and calculation of magnetic field, the distribution and magnitude of vibration signal. Finally, the numerical analysis of the 4.4kVar/220V reactor vibration experiment of magnetically controlled saturated reactor prototype under different control current, analysis of vibration acceleration of different sizes under the control of current reactor core special points and measure, and the calculation results are compared with numerical analysis.

【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM47

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本文編號(hào)：1687887