CAJ | 학술논문

特高压输电线路的潜供电弧燃烧时间长,如果不能及时熄灭,将造成单相自动重合闸失败,从而影响供电安全和系统稳定。因此,有必要研究特高压输电线路的潜供电流。本文首先归纳总结了潜供电流的各种数学计算方法及其优缺点,并指出目前特高压输电线路潜供电流研究中的不足是缺乏仿真和实测数据以及没有考虑电弧模型。接着针对我国在建的淮南—上海1000kV特高压交流同塔双回输电工程,采用PSCAD/EMTDC软件建立了其详细的仿真模型,包含系统模型、线路模型以及电弧模型。最后利用所建模型,对该工程潜供电流进行了仿真研究,计算了单点故障、两点故障和不同线路负载率下的潜供电流及其持续时间。研究结果表明,该工程潜供电流不会影响单相自动重合闸的成功重合。
특고압수전선로적잠공전호연소시간장,여과불능급시식멸,장조성단상자동중합갑실패,종이영향공전안전화계통은정。인차,유필요연구특고압수전선로적잠공전류。본문수선귀납총결료잠공전류적각충수학계산방법급기우결점,병지출목전특고압수전선로잠공전류연구중적불족시결핍방진화실측수거이급몰유고필전호모형。접착침대아국재건적회남—상해1000kV특고압교류동탑쌍회수전공정,채용PSCAD/EMTDC연건건립료기상세적방진모형,포함계통모형、선로모형이급전호모형。최후이용소건모형,대해공정잠공전류진행료방진연구,계산료단점고장、량점고장화불동선로부재솔하적잠공전류급기지속시간。연구결과표명,해공정잠공전류불회영향단상자동중합갑적성공중합。
Since the combustion of secondary arcs in UHV transmission lines is long.If these arcs can＇t be extinguished in time,the single-phase automatic reclosure would be failed,thus having bad effect on supply security and system stability.As a result,it is necessary to study secondary arc currents of UHV transmission lines.In this paper,various secondary arc current＇s calculation methods and their advantages and disadvantages are firstly summarized.Meanwhile,the shortages of researches at present on secondary arc current in UHV transmission lines are pointed out,of which one is lacking in simulation and experimental data,the other is without consideration of the arc model.Next,according to the Huainan-Shanghai 1000kV UHVAC double-circuit transmission project which is under construction in China,its simulation model,including models of system,line and arc,is built in details with PSCAD/EMTDC software.Finally,on the base of the built model,simulation research on secondary arc current is presented in the paper.The secondary arc current and its time duration are calculated respectively in the cases of single-point fault,two-point fault as well as under the circumstance when line load ratios are different.The results show that secondary arc current of the project wouldn＇t have influence on accomplish of the single-phase automatic reclosure.