英语翻译翻译时可作参考,语义是关联的Differential protective relay has been use

英语翻译
翻译时可作参考,语义是关联的
Differential protective relay has been used as the primary
protection of most power transformers for many years.Inrush
can be generated when a transformer is switched on the
transmission line or an external line fault is cleared.It may
result in mal-operation of differential protection if blocking
scheme is unavailable.Therefore,discrimination between an
internal and a magnetizing inrush current has long been
recognized as a challenging power transformer protection
problem.Since a magnetizing inrush current generally
contains a large second harmonic component [2],[3] in
comparison to an internal fault,conventional transformer
protection systems are designed to restrain during inrush
transient phenomenon by sensing this large second harmonic.
However,the second harmonic component may also be
generated during internal fault due to CT saturation or the
existence of a shunt capacitor or the distributive capacitance
in a long EHV transmission line to which the transformer
may be connected.In certain cases,the magnitude of the
second harmonic in an internal fault current can be close to
or greater than that present in the magnetizing.Moreover,the
second harmonic components in the magnetizing inrush
currents tend to be relatively small in modern large power
transformer because of improvements in the power
transformer core material.Recently,other techniques have
been developed to carry out current classification applied in
transformer protection,including pattern recognition using
trained artificial neural network (ANN),transformer
inductance during saturation,fuzzy logic and flux and
voltage restraints [3],[4].These techniques require a large
computational burden,large memory to accommodate the
required algorithms,complex experimental data or large
dependence on the transformer parameters.
This paper proposes a new principle to discriminate
between an internal fault and a magnetizing inrush current
by correlation function principle in DSP and the selfcorrelation
function of the sampled data is calculated and
compared with the standard self-correlation function formed
with sinusoidal current.The results of theoretical analysis
and dynamic simulation verify the feasibility of the
proposed method.
12303338你才抽疯呢，自然有人会的

Differential protective relay has been used as the primary protection of most power transformers for many years.差动保护继电器在大多数电力变压器中作为主保护已经采用好多年了.Inrush can be generated when a transformer is switched on the transmission line or an external line fault is cleared.涌流可能产生在变压器切换到输电线上或外部线路故障被清除时.It may result in mal-operation of differential protection if blocking scheme is unavailable.Therefore,discrimination between an internal and a magnetizing inrush current has long been recognized as a challenging power transformer protection problem.如果未能利用闭锁方案,它会导致差动保护的误动作.因此,在内部涌流和励磁涌流之间做出鉴别一直被认为是电力变压器保护的具有挑战性的问题.Since a magnetizing inrush current generally contains a large second harmonic component [2],[3] in comparison to an internal fault,conventional transformer protection systems are designed to restrain during inrush transient phenomenon by sensing this large second harmonic.因为励磁涌流与内部涌流相比,一般包含大的二次谐波分量【2】,【3】,所以常规的变压器保护系统都通过传感这一大的二次谐波而被设计成在涌流瞬态现象过程中抑制.However,the second harmonic component may also be generated during internal fault due to CT saturation or the existence of a shunt capacitor or the distributive capacitance in a long EHV transmission line to which the transformer may be connected.然而,二次谐波分量在内部故障过程中也可能因CT（电流互感器）饱和,或并联电容器的存在,或可能与变压器连接的大长度超高压输电线上分布电容的存在而产生.In certain cases,the magnitude of the second harmonic in an internal fault current can be close to or greater than that present in the magnetizing.Moreover,the second harmonic components in the magnetizing inrush currents tend to be relatively small in modern large power transformer because of improvements in the power transformer core material.在一定情况下,在内部故障电流中二次谐波的幅值可能接近或大于存在于励磁作用中的幅值.而且,在现代化的大型电力变压器中,励磁涌流中的二次谐波分量往往相对较小,因为电力变压器铁芯的材料改进了.Recently,other techniques have been developed to carry out current classification applied in transformer protection,including pattern recognition using trained artificial neural network (ANN),transformer inductance during saturation,fuzzy logic and flux and voltage restraints [3],[4].最近,其他技术已经开发出来,以进行电流的分类而用于变压器保护,这些技术包括：采用经过训练的人工神经网络（ANN）,在饱和过程中的变压器电感,模糊逻辑,以及磁通和电压制动来识别图形【3】,【4】.These techniques require a large computational burden,large memory toaccommodate the required algorithms,complex experimental data or large dependence on the transformer parameters.这些技术需要大的计算负荷,大的存储器来容纳所需的算法,还需要复杂的实验数据或对变压器参数大的依存性.
问题补充：This paper proposes a new principle to discriminate between an internal fault and a magnetizing inrush current by correlation function principle in DSP and the selfcorrelation
function of the sampled data is calculated and compared with the standard self-correlation function formed with sinusoidal current.The results of theoretical analysis and dynamic simulation verify the feasibility of the proposed method.
本文提出了一种新的原理,以便用数据信号处理（DSP）中的相关函数原理鉴别内部故障涌流和励磁涌流,并对采样数据的自相关函数进行了计算,并与由正弦电流形成的标准自相关函数做了比较.理论分析和动态仿真的结果验证了所提出方法的可行性.