自适应零序电流速断保护中实时计算系统参数算法仿真与研究_刘辉.pdfVIP

20 06 1 1 25 2 3 6 T eleco m Pow er T echnolog ies N ov . 25 , 2 00 6, V ol . 23 N o. 6 : 1009- 36 64( 2 006) 06- 0022- 03 , ( , 44 30 02) [ 1] : 针对 统零序电流速断保护 的灵敏度受系统运行方式变化和接地短路类型影响的局限性, 提出了实时检测系统参 数来实现自适应式零序电流速断保护文中以计算系统等值零序内阻抗为例, 并通过仿真研究证实了方法的有效性和可行性 : 零序电流速断保护; 自适应保护; 仿真 : T M 493 : A Simula ion and S u dy on h e Algor i hm of Real-T im e Calcula ion on Sys em P ar am e er s for A dap ive Zero- Sequence Curren F as -T r ipp ing P r o ec ion s L IU Hui , YU AN Zhao- qiang ( Dep . of Elec ric Engineering and Infor ma io n T echnolo gy , T hr ee Go rges U niv ersi y , Y ichang 44 30 02 , China) Abs r ac : A imed a he limi a io n of he sensi ivi y of he f as- ripping zero- sequence cur ren pr o ec io ns aff ec ed by var ie ies of sys em o pera ion condi ions and by diff er ences of g rounded f aul y pes, his paper presen s a f easible design o f real- ime calcula io n on sy s em par ame ers o r ealize he adap iv e f as- ripping zero- sequence cur ren pr o ec io ns . T he pr o- posed appro ach u ses in r ea-l ime calcula ing sy s em in ernal equivalen zer o- sequence im pedance o ver ify eff ec iveness and f easibili y w i h simula ion s udies . Key w o rds : f as- r ipping zer o- sequence cur ren pro ec ions; adap ive pro ec ion relay; simula ion dio 0 0 0 0 1 - u = R i + L dt 1( a) , K ,R0 L 0 [ 2]