本文選題：1000kV特高壓交流 + 電場強度�。� 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：為了實現(xiàn)能源的高效利用,逐步形成以電能為中心的能源格局,同時也應(yīng)對越來越明顯的能源資源與能源需求的逆向分布問題等,國家正大力建設(shè)特高壓電網(wǎng)以滿足社會發(fā)展的需求。特高壓交流輸電設(shè)備可能產(chǎn)生的電磁危害已經(jīng)引起人們的關(guān)注與擔(dān)憂。有許多學(xué)者對特高壓交流輸電設(shè)備可能造成的電磁輻射進行過研究。但是,選取的特高壓交流輸電線路模型簡單,輸電桿塔單一,與實際特高壓交流輸電工程有著較大差距;考慮特高壓交流輸電線路對人體的影響比較簡單,多將人體看為一個求解域等�；诖�,本文研究現(xiàn)行較多采用的特高壓交流輸電桿塔和改進的特高壓交流輸電桿塔線路附近的電磁環(huán)境變化規(guī)律,并作出電磁環(huán)境安全評估。論文基于現(xiàn)行的1000kV特高壓交流輸電工程,分析一些常見因素,如離地高度、相間距、線路分裂根數(shù)、線路排線方式、雙回路相序和計及線路弧垂等因素對特高壓交流輸電線路周圍工頻電磁場分布的影響,同時對現(xiàn)行的1000kV特高壓交流ZMP1貓頭型輸電桿塔線路和采用國家電網(wǎng)一些主要研究單位提出的緊湊型輸電桿塔線路周圍工頻電場和工頻磁場的分布情況進行比較分析。結(jié)合國內(nèi)外權(quán)威期刊給出的人體尺寸與機體組織電磁參數(shù),同時進行部分驗證,構(gòu)建貼近實際的人體模型。研究1000kV特高壓交流ZMP1貓頭型和緊湊型輸電桿塔線路在長年常見的天氣情況下計及實際弧垂線路以及經(jīng)過具有典型高度差區(qū)域的線路下方的人體附近和人體內(nèi)部,包括人體軀干和人體頭部的頭皮、顱骨、腦組織以及腦組織中的頭部中樞神經(jīng)系統(tǒng)等的電場強度、電流密度和磁感應(yīng)強度分布規(guī)律,并對幾種仿真計算結(jié)果進行對比分析。對于電磁輻射安全,與國際通用的ICNIRP(International Commission on Non-Ionizing Radiation Protection,國際非電離輻射防護委員會)導(dǎo)則中的職業(yè)人員限值和普通民眾限值標(biāo)準(zhǔn)進行比較,作出電磁輻射安全評估,并給出防護建議。結(jié)果表明:我國目前的1000kV特高壓交流輸電線路,對位于其附近的人體中產(chǎn)生的電場強度、電流密度較大值部分主要集中于人體的機體組織連接處以及腿部。現(xiàn)行的ZMP1貓頭型1000kV特高壓交流輸電桿塔線路在人體內(nèi)產(chǎn)生的電場強度和磁感應(yīng)強度沒有超過ICNIRP導(dǎo)則中普通民眾限值,電流密度則在人體組織連接處與腿部存在超出ICNIRP普通民眾限值的風(fēng)險,但沒有超過ICNIRP導(dǎo)則中的職業(yè)人員限值。而采用緊湊型輸電桿塔的1000kV特高壓交流輸電線路能較大地降低在人體中產(chǎn)生的電場強度、電流密度和磁感應(yīng)強度。對于在1000kV特高壓交流ZMP1貓頭型輸電桿塔線路附近的普通民眾,應(yīng)注意對身體組織關(guān)節(jié)處以及腿部的電磁輻射防護。
[Abstract]:In order to realize the efficient use of energy and gradually form the energy pattern centered on electric energy, the reverse distribution of energy resources and energy demand is becoming more and more obvious. The country is vigorously building UHV power grids to meet the needs of social development. The possible electromagnetic hazard caused by UHV AC transmission equipment has attracted people's attention and concern. Many scholars have studied the possible electromagnetic radiation caused by UHV AC transmission equipment. However, the selected UHV AC transmission line model is simple, the transmission tower is single, and there is a big gap between the UHV AC transmission line and the actual UHV AC transmission project, and the influence of UHV AC transmission line on human body is relatively simple. Look at the human body as a solution field and so on. Based on this, this paper studies the electromagnetic environment variation law around the UHV AC transmission tower and the improved UHV AC transmission tower, and makes the electromagnetic environment safety assessment. Based on the current 1000kV UHV AC transmission project, this paper analyzes some common factors, such as height from the ground, phase spacing, line splitting root number, line arrangement, The influence of phase sequence and phase sequence of double loop on the distribution of power frequency electromagnetic field around UHV AC transmission line considering the sag of transmission line, At the same time, the distribution of power frequency electric field and power frequency magnetic field around the current 1000kV UHV AC ZMP1 cat head transmission tower line and the compact transmission tower line proposed by some main research units of State Grid are compared and analyzed. Combining the size of human body and the electromagnetic parameters of organism tissue given by authoritative journals at home and abroad at the same time some verification is carried out to construct the human body model which is close to the actual situation. In this paper, 1000kV UHV AC ZMP1 cat head and compact transmission tower lines are studied, which take into account the actual sag line and the human body under the line passing through the typical height difference area under the usual weather conditions for many years. The electric field intensity, current density and magnetic induction intensity distribution of the scalp, skull, brain tissue and the head central nervous system in the human torso and human head are included. The results of several simulation calculations are compared and analyzed. The safety of electromagnetic radiation is compared with the occupational limit in the guidelines of ICNIRP(International Commission on Non-Ionizing Radiation Protection. the International Committee on Non-Ionizing radiation Protection and the standard of limit for ordinary people. The safety of electromagnetic radiation is evaluated and some protection suggestions are given. The results show that the current density of the current 1000kV UHV AC transmission line is mainly focused on the tissue junction and the legs of the human body for the electric field intensity generated in the human body located near the current UHV AC transmission line. The current ZMP1 cat head 1000kV UHV AC transmission tower line produces no more electric field intensity and magnetic induction intensity in the human body than the ordinary people's limit in the ICNIRP guidelines. On the other hand, there is a risk that the current density will exceed the ICNIRP limit for the general public at the junction of human tissue and legs, but not above the limit for professional personnel in the ICNIRP guidelines. The 1000kV UHV AC transmission line with compact transmission tower can greatly reduce the electric field intensity, current density and magnetic induction intensity produced in human body. For the ordinary people in the vicinity of the 1000kV UHV AC ZMP1 cat head transmission tower line, the electromagnetic radiation protection should be paid attention to at the joints of the body tissue and the legs.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM75

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