發(fā)布時(shí)間：2018-01-11 03:08

  本文關(guān)鍵詞：特高壓并聯(lián)電抗器鐵心振動(dòng)研究及仿真分析　出處：《山東大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 特高壓 并聯(lián)電抗器 鐵心振動(dòng) 仿真分析 固有頻率

【摘要】：近年來,隨著我國用電需求快速增長和綠色清潔能源的迫切需求,中國進(jìn)入了超、特高壓輸變電工程的高速發(fā)展時(shí)期。特高壓并聯(lián)電抗器作為遠(yuǎn)距離輸電系統(tǒng)的關(guān)鍵設(shè)備,主要用于補(bǔ)償電力系統(tǒng)的無功容量,降低動(dòng)態(tài)電壓,對(duì)電力電容器的安全運(yùn)行,改善系統(tǒng)電壓波形,同時(shí)對(duì)電網(wǎng)質(zhì)量及安全、經(jīng)濟(jì)運(yùn)行起了良好的作用。伴隨著電壓、容量的增加和電力系統(tǒng)技術(shù)水平的提高,在特高壓并聯(lián)電抗器中,振動(dòng)和噪聲問題尤其突出,而特高壓并聯(lián)電抗器的振動(dòng)主要就是由于鐵心振動(dòng)引起的。特高壓并聯(lián)電抗器的核心問題是由于鐵心振動(dòng)帶來的本體振動(dòng)和噪聲大的問題,威脅設(shè)備及電網(wǎng)的安全運(yùn)行。本文通過對(duì)對(duì)特高壓并聯(lián)電抗器在100Hz頻率下的鐵心振動(dòng)進(jìn)行了仿真,對(duì)電抗器的鐵心進(jìn)行三維建模,對(duì)鐵心和鐵軛的電磁力及夾件、壓梁、器身磁屏蔽等鋼結(jié)構(gòu)件受力進(jìn)行仿真計(jì)算;對(duì)特高壓并聯(lián)電抗器進(jìn)行整體的瞬態(tài)振動(dòng)響應(yīng)分析,求得電抗器整體在各時(shí)刻受到的瞬態(tài)振動(dòng)力,得出各區(qū)域振動(dòng)位移仿真數(shù)據(jù);通過對(duì)鐵心約束數(shù)、約束程度對(duì)特高壓并聯(lián)電抗器鐵心固有頻率的影響進(jìn)行研究,求解前五階的固有頻率,同時(shí)對(duì)特高壓并聯(lián)電抗器固有頻率進(jìn)行仿真分析,得到特高壓并聯(lián)電抗器的各階固有頻率�；诖�,為抑制特高壓并聯(lián)電抗器鐵心振動(dòng),采用了五處壓緊及止退系統(tǒng);通過對(duì)鐵心夾緊結(jié)構(gòu)材料疲勞特性進(jìn)行研究,在鐵心夾緊結(jié)構(gòu)件的關(guān)鍵部位選擇特殊的材料來提高鐵心夾緊結(jié)構(gòu)強(qiáng)度;同時(shí)通過選取合理的磁通密度、心柱及鐵軛尺寸,選取低磁致伸縮率的優(yōu)質(zhì)硅鋼片抑制特高壓并聯(lián)電抗器鐵心振動(dòng)。最后通過對(duì)鐵心振動(dòng)與油箱振動(dòng)的測量,對(duì)比仿真分析結(jié)果,驗(yàn)證鐵心振動(dòng)抑制措施的有效性。
[Abstract]:In recent years, with the rapid growth of China's electricity demand and the urgent need of green clean energy, China has entered into the super. UHV shunt reactor, as the key equipment of long-distance transmission system, is mainly used to compensate the reactive power capacity of power system and reduce the dynamic voltage. For the safe operation of power capacitor, improve the system voltage waveform, at the same time, the quality and safety of the network, economic operation has played a good role, along with the increase of voltage, capacity and power system technology level. In UHV shunt reactors, the vibration and noise problems are especially prominent. The vibration of UHV shunt reactor is mainly caused by the core vibration. The core problem of UHV shunt reactor is the vibration and noise caused by the core vibration. In this paper, the core vibration of UHV parallel reactor at 100Hz frequency is simulated, and the three-dimensional modeling of the core of reactor is carried out. The electromagnetic force of iron core and yoke and the force of steel structure such as clamping beam and magnetic shield are simulated and calculated. The transient vibration response of UHV shunt reactor is analyzed, and the transient vibration force of the whole reactor at every moment is obtained, and the simulation data of vibration displacement in each region are obtained. Through the study of the influence of the number of core constraints and the degree of constraint on the core natural frequency of UHV shunt reactor, the first five natural frequencies are solved. At the same time, the natural frequency of UHV shunt reactor is simulated and analyzed. The natural frequencies of the UHV shunt reactor are obtained. In order to suppress the core vibration of UHV shunt reactor, five pressure tightening and stopping systems are adopted. By studying the fatigue characteristics of the core clamping structure material, special materials are selected in the key parts of the core clamping structure to improve the strength of the core clamping structure. At the same time, select reasonable magnetic flux density, core and iron yoke size, select low magnetostrictive rate of high quality silicon steel to suppress UHV parallel reactor core vibration. Finally, through the measurement of core vibration and oil tank vibration. Compared with the simulation results, the effectiveness of the core vibration suppression measures is verified.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM472

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