电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2015年
10期
114-118
,共5页
章敏捷%章耀耀%张楠%王曦冉
章敏捷%章耀耀%張楠%王晞冉
장민첩%장요요%장남%왕희염
输电线路%二次电弧%重合闸时间%暂态能量函数%暂态稳定性%时间闭锁
輸電線路%二次電弧%重閤閘時間%暫態能量函數%暫態穩定性%時間閉鎖
수전선로%이차전호%중합갑시간%잠태능량함수%잠태은정성%시간폐쇄
transmission lines%secondary arc%reclosing time%transient energy function%transient stability%time lock-out
判断二次电弧的自适应重合闸作为一种注重可靠性的重合闸动作方式通过测量线路熄弧特征量来进行重合闸闭锁判别。一般自适应研究是以重合闸系统判断完全正确且没有误动可能作为前提,忽略了重合闸动作在暂态过程中的误动于永久性故障下可能对系统产生的危害。由于在故障跳闸后系统暂态能量随时间呈现波动状态,依照时间轴上暂态能量分布对系统重合闸进行大冲击闭锁,可大幅减小由于探测量波动、探测误差、设备误动等对系统暂态稳定性造成的冲击。仿真实验证明,该方法比原有方法在防误动、可靠闭锁方面有明显改善。
判斷二次電弧的自適應重閤閘作為一種註重可靠性的重閤閘動作方式通過測量線路熄弧特徵量來進行重閤閘閉鎖判彆。一般自適應研究是以重閤閘繫統判斷完全正確且沒有誤動可能作為前提,忽略瞭重閤閘動作在暫態過程中的誤動于永久性故障下可能對繫統產生的危害。由于在故障跳閘後繫統暫態能量隨時間呈現波動狀態,依照時間軸上暫態能量分佈對繫統重閤閘進行大遲擊閉鎖,可大幅減小由于探測量波動、探測誤差、設備誤動等對繫統暫態穩定性造成的遲擊。倣真實驗證明,該方法比原有方法在防誤動、可靠閉鎖方麵有明顯改善。
판단이차전호적자괄응중합갑작위일충주중가고성적중합갑동작방식통과측량선로식호특정량래진행중합갑폐쇄판별。일반자괄응연구시이중합갑계통판단완전정학차몰유오동가능작위전제,홀략료중합갑동작재잠태과정중적오동우영구성고장하가능대계통산생적위해。유우재고장도갑후계통잠태능량수시간정현파동상태,의조시간축상잠태능량분포대계통중합갑진행대충격폐쇄,가대폭감소유우탐측량파동、탐측오차、설비오동등대계통잠태은정성조성적충격。방진실험증명,해방법비원유방법재방오동、가고폐쇄방면유명현개선。
Adaptive reciosure by judging secondary arc is a reclosing way that focuses on reliability.It distinguishes reclosing lockout by measuring the amount of extinguished arc characteristics of line.Generally, the research of adap-tive reciosure is based on unmistaken judging and act of reclosure system, ignoring the potential harm that reciosure could misact in permanent fault that affects transient stability.Because the transient energy of system after a fault trip fluctuates with the growing time, when locking the system of reciosure that causes large impact basing on the distribu-tion of transient energy of timeline, it can greatly reduce impact of transient stability of system that is caused by the fluctuations of detectable amounts, detection error and equipment malfunction.The results of simulation show that the method has a more significant improvement than the original method in anti misoperation and reliable latching.