近区故障 meaning in Chinese
close-in fault
Examples
- The merit of travelling waves location is its high precision , but it has dead line if the fault location is close to the line terminal or the fault occurs at the time close to zero point of current
行波法测距的优点是精度高，但对近区故障或电流过零附近时刻发生的故障存在测距死区。 - Because affected by the type of lines , fault resistance and two sides systems ， fault analytical location has lower precision , but it has no dead line and is more better accurate if the fault location is close to the line terminal
故障分析法由于受线路类型、过渡电阻、两端系统的影响测距精度较差，但故障分析法不存在测距死区，尤其对近区故障的测距较为准确。 - Applying relative arithmetic to all kinds of faults and calculating off - line , we can master time - distance relation chart for all kinds of faults . computation indicates : when transmission lines occur faults , the data window of protection algorithm consisting of prefault and postfault data at the same time has important significance . the following methods are useful to achieve the inverse time characteristic : calculating impedance by using flourier in a full cycle , calculating work voltage by using fault component , calculating the torque created by a phase comparator or a magnitude comparator
实际的计算表明：输电线路发生故障后，用故障前后的数据同时充满保护算法的数据窗，对于快速切除近区故障具有很重要的意义；同时利用故障前后的数据，下述方法可以比较好地实现距离保护的反时限特性：直接用全周傅里叶算法进行阻抗计算；采用工频变化量阻抗继电器进行工作电压的计算；采用转矩的思想进行转矩的计算。 - So the development of self - energy sf6 cb is very important . in the paper , the math model of arc - quenching chamber air - pressure character is built on the base of 126kv / 31 . 5ka self - energy sf6 cb ' s exploiting , then the theory analysis and calculation is deeply been done for cylinder radius , nozzle spout radius and opening position of moved contact that they have the essential effect for the use of arc energy in the course of opening . arc - quenching chamber parameter is confirmed according to the request of full opening and fault opening when the cb is opening
本文针对126kv31 . 5ka自能式sf _ 6断路器的研制，建立了相应的灭弧室气压特性数学模型，对自能式sf _ 6断路器开断过程中电弧能量利用有重要影响的灭弧室缸径、喷口直径、动触杆开口位置进行了详细深入的理论分析和计算，并根据断路器开断中的满容量开断和近区故障开断的要求确定了灭弧室参数。 - Microprocessor distance protection set is one of the most important protections for high - pressure transmission lines . when high pressure transmission line occurs fault , due to it ' s high voltage level , faults brings big impact to power system and users . the closer the faults occur , the bigger impact it brings
高压线路发生故障时，由于电压等级高，涉及面大，对于电力系统以及电力用户冲击很大；高压线路故障地点距离保护安装处越近，对于电力系统以及电力用户的冲击越大；距离保护的近区故障快速动作具有很重要的意义，本文基于上述目的研究微机距离保护的反时限。