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single earth fault
相关语句
  单相接地故障
     Due to the nature of weak and unstable fault current,single earth fault detection in non-solid grounded network has been very difficult.
     小电流接地电网单相接地故障电流小,电弧不稳定,难以检测。
短句来源
  单相接地
     Application of DSP and MAX125 to Single Earth Fault Selection Device
     DSP和MAX125在单相接地选线装置中的应用
短句来源
     Based on the characteristics of TMS320LF2407, this paper presents the application of DSP to single earth fault selection device with small current grounding system.
     根据TMS320LF2407的特点,介绍了DSP在小电流接地系统单相接地选线装置中的应用。
短句来源
     This relay is both an interphase fault, turn-to-turn, single earth fault protection and an overvoltage protection.
     既是相间短路保护、匝间短路和单相接地保护,也可兼作过电压保护。
短句来源
     Due to the nature of weak and unstable fault current,single earth fault detection in non-solid grounded network has been very difficult.
     小电流接地电网单相接地故障电流小,电弧不稳定,难以检测。
短句来源
     At last,soft design in discussed in single earth fault selection device.
     最后,给出了单相接地选线装置中的DSP软件设计方法。
短句来源
  “single earth fault”译为未确定词的双语例句
     The statistical results of calculation precision. error distribution, calculation speed and so on are given. A real case about the adjustment calculation of single earth fault and re-close operation is also given.
     文中介绍了其在CC2000开放式 EMS环境中的在线实时环境、数据流,以及为调度人员使用方便而在程序运行模式、人机界面等方面进行的工程考虑,并给出了计算精度、误差分布、计算速度等统计结果和实际工况单相重合闸操作的整定计算实例。
短句来源
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The character and scheme of differential protection of high-power transformers are analysed. This kind of relay is constituted by active filters, integrated operational amplifier, CMOS circuit etc. The operating time approaches to 10 ms. The protection consists of percentage, 2nd, 5th harmonic restraint, differential cut-off, broken wire interlocking. This relay is both an interphase fault, turn-to-turn, single earth fault protection and an overvoltage protection. The pick-up current is 0.1 I_(non) of...

The character and scheme of differential protection of high-power transformers are analysed. This kind of relay is constituted by active filters, integrated operational amplifier, CMOS circuit etc. The operating time approaches to 10 ms. The protection consists of percentage, 2nd, 5th harmonic restraint, differential cut-off, broken wire interlocking. This relay is both an interphase fault, turn-to-turn, single earth fault protection and an overvoltage protection. The pick-up current is 0.1 I_(non) of the transformer.

本文分析了超高压大容量变压器构成差动保护的特征及实施方案,本装置中由于采用了性能较好的有源滤波器,电路中将运算放大器和CMOS门电路混合使用,差动保护的动作时间接近半个周波。差动保护由比率制动、二次谐和五次波制动,差动速断等部分构成。对不带负荷调压的变压器动作电流为0.1倍额定电流。既是相间短路保护、匝间短路和单相接地保护,也可兼作过电压保护。装置中设有电流互感器二次回路断线闭锁。

The single earth-fault in three phase network earthed neutral is called as single phase short circuit, and that in three phase network insulated to earth is called as leakage fault. The paper emphatically clarifies their inherent law and difference by means of comparative analysis, and then points out their different monitoring counterplot.

同样是三相电网的“单相接地”,发生于中性点直接接地系统称“单相短路”故障,而发生于中性点绝缘系统叫“接地漏电”故障。本文通过这两种“单相接地故障”的对比分析,着重阐明二者的内在规律及其相异性,进而指出这两种故障监测与保护的不同对策。

EEAC method, has high-speed and quantitative characteristics. is the unique transient stability analysis method which can meet the requirement of on-line real-time application in the EMS in the world for power system. EEAC on-line software package has won users' trust and approval and is being improved continually from algorithm to engineering practice by the accumulation of experience from users' feedback, since it has been put into on-line operation in Northeast China Power System for five years. The on-line...

EEAC method, has high-speed and quantitative characteristics. is the unique transient stability analysis method which can meet the requirement of on-line real-time application in the EMS in the world for power system. EEAC on-line software package has won users' trust and approval and is being improved continually from algorithm to engineering practice by the accumulation of experience from users' feedback, since it has been put into on-line operation in Northeast China Power System for five years. The on-line real-time environment and data flow of EEAC method in the CC2000open environment of EMS are introduced. Some engineering considerations, such as the program operation model and man-machine interface. are presented to give the dispatchers convenience. The statistical results of calculation precision. error distribution, calculation speed and so on are given. A real case about the adjustment calculation of single earth fault and re-close operation is also given.

EEAC算法是目前国际上唯一能满足在线实时要求,具有定量性、快速性的电力系统暂态稳定分析方法。 EEAC在线软件包在东北电网中经过5年在线运行,获得了用户的信任和认可,也从用户的反馈中积累了丰富的经验,从算法到工程实施都得到了不断改进。文中介绍了其在CC2000开放式 EMS环境中的在线实时环境、数据流,以及为调度人员使用方便而在程序运行模式、人机界面等方面进行的工程考虑,并给出了计算精度、误差分布、计算速度等统计结果和实际工况单相重合闸操作的整定计算实例。

 
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