【摘要】：隨著科技與經(jīng)濟(jì)的快速進(jìn)步和發(fā)展,智能電網(wǎng)的普及,輸電線路的電壓等級也在不斷的提高。為了能夠?qū)崟r監(jiān)視和測量線路的運(yùn)行情況及線路的運(yùn)行參數(shù),越來越多的監(jiān)測裝置和電子設(shè)備安裝在輸電線路中,進(jìn)而提高電力系統(tǒng)供電的穩(wěn)定性。由于輸電線路上的監(jiān)測裝置和電子設(shè)備常常處于強(qiáng)磁場、高電壓的環(huán)境下,設(shè)計出穩(wěn)定且可靠的供電電源是監(jiān)測裝置和電子設(shè)備穩(wěn)定運(yùn)行的保障。為解決給輸電線路在線監(jiān)測裝置可長期運(yùn)行且有足夠功率的電源供電問題,討論了一種直接安裝在輸電線路上的取能方案。在目前的供電電源中,感應(yīng)取電電源是實(shí)際應(yīng)用性較好的一種取能方式,論文主要針對感應(yīng)取電電源中存在的磁飽和問題和供電死區(qū)問題進(jìn)行了研究。首先,陳述了與感應(yīng)取電電源相關(guān)的基本原理,討論了取能電源與各參數(shù)間的關(guān)系,以及影響取能磁芯的磁飽和的因素。然后,為了解決取能磁芯易進(jìn)入飽和狀態(tài)的問題,本論文進(jìn)行了相關(guān)理論分析和軟件仿真,取能磁芯的材料選用了磁感應(yīng)強(qiáng)度較高且經(jīng)濟(jì)的硅鋼片。論文對取能磁芯的形狀進(jìn)行了設(shè)計,由兩個C型磁芯構(gòu)成。由于兩個C型磁芯的接口處有一定間距的小氣隙,會產(chǎn)生一定的氣隙磁阻,由于氣隙磁阻的存在,會避免取能磁芯過早的進(jìn)入磁飽和狀態(tài)。通過相關(guān)公式計算,確定取能線圈匝數(shù)。其次,當(dāng)輸電線路遭受雷擊和通過大電流時,為了躲過取能線圈感應(yīng)出較高的沖擊性電流,在取能線圈后接入了抗沖擊保護(hù)電路。同時,對取能電源的整流、濾波、穩(wěn)壓電路部分,也進(jìn)行了功能對比和選擇。本文為了使在線裝置獲得穩(wěn)定的供電電壓,把波動的直流電壓變?yōu)榉�(wěn)定的直流電壓,本文選用了LM2596AD 開關(guān)集成穩(wěn)壓器。最后,本文選用了Multisim軟件對取能電源進(jìn)行了整體的測試和仿真,本取能電源經(jīng)過測試后,取能電源的輸出電壓基本符合預(yù)期的要求,驗(yàn)證了供電的穩(wěn)定性。同時,也進(jìn)行了實(shí)驗(yàn)室模擬平臺的搭建。
[Abstract]:With the rapid progress and development of technology and economy, the popularization of smart grid, the voltage level of transmission line is also increasing. More and more monitoring devices and electronic devices are installed on transmission lines to improve the power supply stability in order to monitor and measure the line operation and line parameters in real time. Because the monitoring device and electronic equipment on the transmission line are often in strong magnetic field and high voltage environment, the design of a stable and reliable power supply is the guarantee of the stable operation of the monitoring device and electronic equipment. In order to solve the problem that the on-line monitoring device of transmission line can be operated for a long time and has sufficient power supply, a scheme of energy acquisition is discussed, which is directly installed on the transmission line. In the current power supply, the inductive power supply is a better practical energy acquisition method. This paper mainly focuses on the problem of magnetic saturation and dead time in the induction power supply. Firstly, the basic principles related to the inductive power supply are described, the relationship between the source and the parameters, and the factors affecting the magnetic saturation of the core are discussed. Then, in order to solve the problem that the core is easy to be saturated, this paper has carried on the related theoretical analysis and the software simulation, the material of the energy core has chosen the silicon steel sheet with high magnetic induction intensity and economy. In this paper, the shape of the energy core is designed, which is composed of two C type cores. Due to the small air gap at the interface of the two C-type cores, there will be a certain air-gap magnetoresistance. Because of the presence of the air-gap magnetic resistance, the energy core will avoid entering the magnetic saturation state prematurely. The number of turns of the energy-taking coil is determined by the calculation of the relevant formula. Secondly, when the transmission line is struck by lightning and passes through a large current, in order to avoid the higher impact current induced by the energy fetching coil, the anti-shock protection circuit is connected after the energy extraction coil. At the same time, the functions of rectifying, filtering and stabilizing circuit are compared and selected. In order to obtain a stable supply voltage and change the fluctuating DC voltage into a stable DC voltage, the LM2596AD switch integrated voltage regulator is selected in this paper. Finally, the Multisim software is used to test and simulate the power supply. After testing, the output voltage of the power source is basically in line with the expected requirements, and the stability of the power supply is verified. At the same time, the laboratory simulation platform is also built.
【學(xué)位授予單位】：沈陽農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM75;TM724
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本文編號：2372764