高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
4期
899-904
,共6页
同步关合技术%最佳相位%永磁真空断路器%预击穿%合闸速度%机械分散性
同步關閤技術%最佳相位%永磁真空斷路器%預擊穿%閤閘速度%機械分散性
동보관합기술%최가상위%영자진공단로기%예격천%합갑속도%궤계분산성
synchronous switching%optimal switching phase%permanent magnetic actuator(PMA)%pre-breakdown%closing speed%mechanical dispersion
为了实现永磁真空断路器的同步关合,必须先分析断路器关合时的最佳相位。永磁真空断路器在关合时,动静触头间会发生预击穿,要使断路器在预定的相位角关合,需分析预击穿对同步关合的影响。采用27.5kV用永磁真空断路器,分别在直流和工频交流电压下进行了实验研究。采用高速高精度的采集系统,运用Matlab软件的非线性拟合功能对采样数据进行拟合,得到预击穿间隙和电压之间的关系,分析了在零相位附近实现同步关合时对合闸速度的要求。分析得出,在触头间隙非常小的情况下发生预击穿时可忽略预击穿对同步关合的影响。通过对实验数据进行分析,说明要实现同步关合就必须对机械分散所带来的误差进行补偿。
為瞭實現永磁真空斷路器的同步關閤,必鬚先分析斷路器關閤時的最佳相位。永磁真空斷路器在關閤時,動靜觸頭間會髮生預擊穿,要使斷路器在預定的相位角關閤,需分析預擊穿對同步關閤的影響。採用27.5kV用永磁真空斷路器,分彆在直流和工頻交流電壓下進行瞭實驗研究。採用高速高精度的採集繫統,運用Matlab軟件的非線性擬閤功能對採樣數據進行擬閤,得到預擊穿間隙和電壓之間的關繫,分析瞭在零相位附近實現同步關閤時對閤閘速度的要求。分析得齣,在觸頭間隙非常小的情況下髮生預擊穿時可忽略預擊穿對同步關閤的影響。通過對實驗數據進行分析,說明要實現同步關閤就必鬚對機械分散所帶來的誤差進行補償。
위료실현영자진공단로기적동보관합,필수선분석단로기관합시적최가상위。영자진공단로기재관합시,동정촉두간회발생예격천,요사단로기재예정적상위각관합,수분석예격천대동보관합적영향。채용27.5kV용영자진공단로기,분별재직류화공빈교류전압하진행료실험연구。채용고속고정도적채집계통,운용Matlab연건적비선성의합공능대채양수거진행의합,득도예격천간극화전압지간적관계,분석료재령상위부근실현동보관합시대합갑속도적요구。분석득출,재촉두간극비상소적정황하발생예격천시가홀략예격천대동보관합적영향。통과대실험수거진행분석,설명요실현동보관합취필수대궤계분산소대래적오차진행보상。
In order to implement synchronous switching of permanent magnetic actuator（PMA）,the optimal switching phase should be analyzed.During the switching of vacuum breaker,vacuum gap will pre-breakdown,and the influence of pre-breakdown on PMA should be included to ensure closing in the proposed phase.We experimentally studied 27.5 kV PMA vacuum breaker in DC and AC voltage.Using the nonlinear fitting function of matlab,we processed the experimental data obtained from high speed and high accurate instruments,and obtained relations between voltage and the pre-breakdown gap,respectively.Moreover,we analyzed the closing speed to synchronous switching when the closing angle is nearby zero angle of system voltage.It is found that the influence of pre-breakdown on synchronous switching can be ignored if the distance of pre-breakdown is very small.Finally,we analyzed the effect of mechanical dispersion on dynamic pre-breakdown characteristics of synchronous switch phase.
