MATLAB对小电流接地系统单相故障的仿真  

Emulation of MATLAB in the single-phase to ground fault on power system with neutral unearthed

作　　者：张庆生[1] 陶维青[1] 

机构地区：[1]合肥工业大学电气及其自动化学院,安徽合肥230009

出　　处：《仪器仪表用户》2006年第5期154-155,共2页Instrumentation

摘　　要：在小电流接地系统中发生单相接地时,虽然故障点电流很小对负荷的供电没有太多影响,但是其他两相的接地电压升高了,为了防止故障进一步扩大成两点或多点接地短路,应及时采取措施予以消除。MATLAB是对系统进行仿真,通过零序电流和零序电压的波形对系统进行分析,从而得到哪相发生故障。The single-phase to ground happens in the power system with neutral unearthed.lt doesn't influence the providing-power of the load much that the current of the fault pot is very small,but the voltages of the other phases jump.In order to provide the fault from enlarging two pots' or too many pots' grouding short,we must take the action to eliminate it in time.MATLAB emulates the system.From analyzing the shape of the wave of the zero sequence current and zero sequence voltage,we acquire which phase fails.

关 键 词：小电流接地 仿真 零序电流 零序电压 波形 

分 类 号：TM7[电气工程—电力系统及自动化]