And this paper structures the emulation model of 10kv transformer substation by utilizing matlab toolbox , emulations the fault course when single - phase ground fault occurs in the small current earth system . and validates the validity of the " gradual identifying law " 并利用matlab工具箱构建10kv变电站仿真模型,对中性点不接地和经消弧线圈接地系统在不同故障情况下的故障过程进行了仿真,进而验证了“递进信息法”的正确性。
Being a method of time - domain electrical magnetic surveying , the transient electromagnetic method ( tem ) can transmit first pulse electromagnetic field to underground making use of loop or electrical source and receive secondary induction field during of the pulse intermission 瞬变电磁法是一种时间域电磁测量方法，是利用不接地回线或接地线源向地下发送一次脉冲磁场，在一次脉冲磁场的间歇期间，采用不接地线圈接收感应二次磁场。
This paper studies the application of inductively coupled plasma ( icp ) technology to the etching compound semiconductor insb - in film . by means of single probe and double probe , the ion density and electron temperature of chamber ( 30mm and 50mm in height respectively ) under varied process condition were diagnosed . the spatial distribution of the axial position of the two parameters and the varied curve that the two parameters varies with the power and air pressure are obtained 利用单探针和双探针诊断30mm高反应室和50mm高反应室在各种工艺条件下的离子密度和电子温度，得到这两个参数在反应室轴向位置的空间分布、随功率和气压的变化曲线、顶盖接地和反应室体积对它们的影响，结果表明离子密度为10 ~ 8 10 ~ ( 10 ) cm ~ ( - 3 ) ，电子温度在4 10ev之间；当顶盖接地时，该处的等离子体密度明显大于不接地；在同样条件下， 50mm高反应室内的离子密度明显大于30mm高反应室。
Moreover , the epiipc functions properly and stably under well due to the reasonable electrical circuit design and very strong anti - jamming design . this design successfully solves the directionally power current leakage fault action and reject action , and makes it working in both neutral point non - grounded and grounded through resistors or coils under compensate systems and over compensate systems 本次研制的保护器较好地解决了功率方向型漏电的误动作和拒动作问题,使得它既能较好地运行在中性点不接地的系统中,又能用在中性点经消弧线圈接地的欠补偿系统中,同时试用于过补偿系统中。
Overvoltage automatic recording device is restricted by the way which can get overvoltage from power system for a long time , and ca n ' t make great progress . because realtime recording higher voltage level power system require some special device which can get overvoltage , and some technique difficulty exist . and 10kv distribution network is used to supply power for user directly ， its distribution is extensive ， equipment is more and electric insulation level is low , it is easy that overvoltage accident occur 因为要对10kv以上更高电压等级的过电压进行实时记录对过电压获取设备的要求高，技术难度大，并考虑到10kv配电网承担着直接向用户供电的任务，分布广、设备多、绝缘水平低和过电压出现频繁，尤其在中性点不接地系统中，更易因过电压造成绝缘事故。
