本文選題：智能組件 + 抗電磁干擾特性�。� 參考：《華北電力大學》2015年碩士論文

【摘要】：隨著國家電網(wǎng)公司智能電網(wǎng)建設的不斷推進,變電站內(nèi)智能組件種類越來越多,現(xiàn)場運行時會遭遇各種電磁騷擾。在變電站有限的電磁環(huán)境內(nèi)設備之間能否實現(xiàn)電磁兼容共存成為智能電網(wǎng)的焦點。為了確保變電站內(nèi)智能組件的安全穩(wěn)定運行,對其所處位置的電磁環(huán)境進行測量、分析、建模、評估,進而提出抗電磁干擾措施。本文首先利用層次分析和模糊綜合評價相結(jié)合的方法分析了變電站智能組件抗電磁干擾性能指標,建立了變電站智能組件抗電磁干擾性能綜合評價指標體系。其次,利用基于有限元分析法的Ansoft HFSS軟件,對智能組件的二次電纜走線盒仿真建模,分析了縫隙寬度、搭接長度等參數(shù)對走線盒屏蔽效能的影響,利用波導理論給出了物理解釋。提出了—種插槽式的二次電纜走線盒,增加走線盒的凹槽、屏蔽彈片以及搭接接處的金屬裸露等措施,對電磁泄漏起到了極大的抑制作用。而分散接地,對GIS外殼地電位升起到了很好的抑制作用。最后,分析了在高頻情況下電磁干擾(EMI)電源濾波器的插入損耗,提出了提高插入損耗的方法。為了同時達到防浪涌和濾除高頻騷擾的要求,設計了組合式浪涌抑制電路,實驗證明了電路的有效性。
[Abstract]:With the development of smart grid construction in State Grid Corporation, there are more and more kinds of intelligent components in substations, which will encounter various electromagnetic disturbances. It is the focus of smart grid to realize EMC coexistence in the limited electromagnetic environment of substation. In order to ensure the safe and stable operation of intelligent components in substation, the electromagnetic environment of its location is measured, analyzed, modeled and evaluated, and the anti-electromagnetic interference measures are put forward. In this paper, the anti-electromagnetic interference performance index of substation intelligent component is analyzed by using the method of AHP and fuzzy comprehensive evaluation, and the comprehensive evaluation index system of substation intelligent component anti-electromagnetic interference performance is established. Secondly, using the Ansoft HFSS software based on finite element analysis, the simulation model of the secondary cable cabling box of intelligent component is established, and the influence of gap width and lap length on the shielding efficiency of the cable-box is analyzed. The physical explanation is given by using waveguide theory. Some measures, such as a kind of slot type secondary cable wiring box, the increase of the groove of the line box, the shielding of the shrapnel and the metal exposed in the lap joint, are put forward, which can greatly restrain the electromagnetic leakage. And dispersed grounding, the GIS shell potential rise to a good inhibition. Finally, the insertion loss of EMI power filter in high frequency is analyzed, and the method to increase the insertion loss is proposed. In order to meet the requirements of both anti-surge and filtering high-frequency disturbance, a combined surge suppression circuit is designed. The experimental results show that the circuit is effective.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM63;TM76

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相關期刊論文 前2條

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本文編號：1963949