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非有效接地
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  non-effective earthing
     Analysis of Resonant Voltage in Non-effective Earthing System
     非有效接地系统的谐振电压分析
短句来源
     Analyses the mechanism of resonant voltage generated in the non-effective earthing system,which is susceptible to resonance,discusses the ferromagnetic resonance of voltage transformer and the resonance resulting from phase-broken earthing of the system and the measures to eliminate them in particular,and suggests the way to prevent the occurrence of resonance in the non -effective earthing system.
     针对非有效接地系统易发生谐振的问题,分析了系统产生谐振电压的机理,并着重阐述了电压互感器铁磁谐振及系统断相接地引起谐振的产生及消除措施,提出了防止非有效接地系统发生谐振的方法。
短句来源
  non-effectively earthed
     Study on non-effectively earthed system neutral point capacitive current testing methods
     中性点非有效接地系统电容电流测试方法的研究
短句来源
  “非有效接地”译为未确定词的双语例句
     The Analysis of Resonant Voltage for Invalid Grounded System
     非有效接地系统的谐振电压分析
短句来源
     Design of Zinc Oxide Lighting Protector Characteristic Parameter for 35kV Non-Effective Grounding System in High Altitude
     高海拔地区35kV非有效接地系统氧化锌避雷器特性参数的设计
短句来源
     35 kV and 66 kV medium voltage(MV) distribution networks belong to neutral non-effective grounding system, at present there is no good fault location method for them.
     35kV、66kV中压配电网属于中性点非有效接地系统, 目前尚无很好的故障测距方法。
短句来源
     In the neutral point effective ground system, the permissible touch voltage is 50 V (on the ground ) , which serves as the main basis for the determination of the actuation value of the device.
     在中性点非有效接地系统中,允许接触电压为50V(地面),这是确定该装置动作值的主要依据。
短句来源
     The paper isbased on using information fusion, fuzzy set theory to integrate all fault detectionmethod.
     本论文研究应用信息融合、模糊理论解决中性点非有效接地故障选线有效性问题,构造多重判据选线,进行智能融合。
短句来源
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     Towards Effective and Efficient NFS Querying on XML Document
     有效完全结构XML查询
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     An Effective Algorithm to Increase the Nonlinearity of S-boxes
     提高S盒线性度的有效算法
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     Analysis of Resonant Voltage in Non-effective Earthing System
     有效接地系统的谐振电压分析
短句来源
     The Analysis of Resonant Voltage for Invalid Grounded System
     有效接地系统的谐振电压分析
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     2) effective teaching;
     有效教学 ;
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  non-effectively earthed
A reliable fault location method of isolating the single phase-to-ground fault (SPGF) in the non-effectively earthed network, which makes use of the fault generated trnasient signals, is also proposed.
      


At present, there exist different understandings of the functions of the earthed protection device. Through analysis and calculations, this paper suggests that the main function of such device is to provide protection against the human indirect touch of 6kV network and that the protection against the direct touch can notbe guaranteed. In the neutral point effective ground system, the permissible touch voltage is 50 V (on the ground ) , which serves as the main basis for the determination of the actuation value...

At present, there exist different understandings of the functions of the earthed protection device. Through analysis and calculations, this paper suggests that the main function of such device is to provide protection against the human indirect touch of 6kV network and that the protection against the direct touch can notbe guaranteed. In the neutral point effective ground system, the permissible touch voltage is 50 V (on the ground ) , which serves as the main basis for the determination of the actuation value of the device. To ensure human safety, the safety current of the human body should not be greater than 30 mA in the surface and underground conditions of mines. To ensure the reliability of the power supply to the open - pit mines, it is not only necessary but also possible to achieve the longitudinal and transversal selectivity of the earthed protection device in the power networks of mines. This paper presents the selective protection scheme for reference by the design engineers.

目前大家对接地保护装置的作用有着不同的理解。本文经过分析计算之后提出了接地保护装置的作用主要是对人员间接接触6kV电网时有防护作用,不能苛求该装置对直接接触6kV电网也要有防护功能;在中性点非有效接地系统中,允许接触电压为50V(地面),这是确定该装置动作值的主要依据。为保证人身安全,在矿山地面及矿井井下条件下,人身安全电流不宜大于30mA。为保证露天矿供电可靠性,实现矿山电网接地保护的纵横向选择性,不仅必要,而且可能。本文最后提出了选择性保护方案建议,供设计人员参考。

The paper analyses that non-interspace MOA for 35kV neutral point non-effective grounding system exists the problem and parameterdesign of GB11032-89 is non-rationality. According to high altitude characteristic,the paper provides suited characteristic parameter for 35kV system MOA.

文章从氧化锌避雷器电气特性分析入手 ,针对目前 35kV中性点非有效接地系统无间隙MOA存在的主要问题及GB1 1 0 32 - 89《交流无间隙金属氧化物避雷器》设计参数的不合理性 ,结合高原特点 ,系统地提出了适应高海拔地区35kV系统MOA的特性参数。并对挂网运行情况进行了总结评价。

When phase to earth fault occurs on a neutral non direct grounded power system, it is necessary to select the faulted circuit quickly,but so far this has not been done very well.This paper gives a brief analysis firstly to fault transient characteristics of these kinds of system,and then presents a novel fault circuit selecting method.The proposed method utilizes wavelets transform to obtain useful fault transient components,and therefore is superior in adaptability and sensibility to currently used methods...

When phase to earth fault occurs on a neutral non direct grounded power system, it is necessary to select the faulted circuit quickly,but so far this has not been done very well.This paper gives a brief analysis firstly to fault transient characteristics of these kinds of system,and then presents a novel fault circuit selecting method.The proposed method utilizes wavelets transform to obtain useful fault transient components,and therefore is superior in adaptability and sensibility to currently used methods in which steady state components are based.

中性点非有效接地配电网发生单相接地故障时 ,尽快选出故障线路对电网运行有重要意义 ,但选线问题迄今尚未能很好解决。在分析了小电流接地电网发生单相接地时暂态特征的基础上 ,提出应用小波变换提取故障暂态信息 ,实现故障选线的方法。由于利用暂态量 ,该方法适应性、灵敏性均优于现有的基于稳态量方法。

 
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