CAJ | 학술논문

为了解特高压交流输电线路邻近建筑物时畸变电场,采用有限元法计算了1 000kV交流同塔双回输电线路邻近不同结构和材料建筑物时的工频电场。首先建立了含弧垂导线、钢架和空气场域的计算模型和有限元模型;然后计算分析了钢架附近地面、阳台和屋顶的工频电场,通过与实验模型比较验证了计算方法的有效性;最后分析了钢筋和砖土材料房屋楼顶的畸变电场,比较了2种房屋是否开窗时阳台和室内的场强。结果表明,有限元法可有效计算建筑物周围的工频电场;靠近导线侧房屋棱角及棱边附近工频电场畸变较大,钢筋和砖土房屋楼顶棱边中心处畸变电场分别为10.40kV/m和6.02kV/m,较不存在房屋时分别畸变了123.18%和29.18%;砖土材料对室内电场屏蔽效果较差,其一层室内最大场强可达4.82kV/m;开窗会使钢筋房屋阳台处电场从32.2mV/m增大到1.95kV/m,但砖土房屋阳台电场变化较小。
위료해특고압교류수전선로린근건축물시기변전장,채용유한원법계산료1 000kV교류동탑쌍회수전선로린근불동결구화재료건축물시적공빈전장。수선건립료함호수도선、강가화공기장역적계산모형화유한원모형;연후계산분석료강가부근지면、양태화옥정적공빈전장,통과여실험모형비교험증료계산방법적유효성;최후분석료강근화전토재료방옥루정적기변전장,비교료2충방옥시부개창시양태화실내적장강。결과표명,유한원법가유효계산건축물주위적공빈전장;고근도선측방옥릉각급릉변부근공빈전장기변교대,강근화전토방옥루정릉변중심처기변전장분별위10.40kV/m화6.02kV/m,교불존재방옥시분별기변료123.18%화29.18%;전토재료대실내전장병폐효과교차,기일층실내최대장강가체4.82kV/m;개창회사강근방옥양태처전장종32.2mV/m증대도1.95kV/m,단전토방옥양태전장변화교소。
To research distorted electric field of the building near UHV AC transmission lines, a finite element method/FEM} was applied to calculate the distorted electric field produced by 1 000 kV AC double circuit transmission lines on the same tower, including the electric field of reinforced building and brick building. Firstly, the calculation model and finite element model of transmission lines with sag, steel frame and air field were established. Then, the electric field of the balcony, the roof and the surrounding area of the steel frame were calculated. UHV AC experiments verified the effectiveness of the calculation method. Finally, the distorted electric field of the reinforced building roof and the brick building roof are researched. In the cases of window opened and closed the electric field of both the balconies and indoors are compared. The results show that FEM can effectively calculate the distorted electric field of the buildings. The electric field of the building edges and building corners are seriously distorted. The electric field of the reinforced building roof and the brick building roof were 10.40 kV/m and 6.02 kV/m, respectively, distorted by 123. 61% and 29. 18%, respectively. The reinforced building had a stronger shielding effect on indoor electric field than the brick building, and the indoor electric field of the brick building reached 4.82 kV/m; the electric field change of the reinforced building was greater than that of the brick building by opening the window, while the electric field of reinforced building balcony reached 1.95 kV/m from 32.22 mV/m.