differential pressure switch是什么意思

anjia01242022-10-04 11:39:542条回答

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亮铮铮 共回答了21个问题 | 采纳率95.2%
差压开关
双语对照
词典结果:
differential pressure switch
[英][ˌdɪfəˈrenʃəl ˈpreʃə switʃ][美][ˌdɪfəˈrɛnʃəl ˈprɛʃɚ swɪtʃ]
压差开关,压差传感器;
1年前
fj12530 共回答了3个问题 | 采纳率
压差开关,压差传感器
1年前

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翻译:differential ring extensions with no new constants
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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.
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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.
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Solve the differential equations:
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Because the differential cross section is usually independent of ¢,we need to consider beam particles at only ¢=0.We have to take into account the fact that in a real beam,there are more particles at some values of b than at others.
因为微分散射截面通常都不依赖于¢,我们只需要考虑位于¢=0的束中粒子.我们必须考虑到一个事实,即实际的粒子束中,某些b的取值总是比其他b的取值对应着更多粒子.(即粒子数目对于b的分布不是均匀的,取某些特定b值会得到更多粒子数目)
That is,the number of particles in a real beam is proportional to InbAb,the area of the ring between b and b + Ab,where we have integrated over the values of to obtain the factor of lit.Here Ab is the interval between the values of b used in the program.Because there is only one target in the beam,the target density is n = (公式)
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differential pressure switch
[英][ˌdɪfəˈrenʃəl ˈpreʃə switʃ]
[美][ˌdɪfəˈrɛnʃəl ˈprɛʃɚ swɪtʃ]
意思为:压差开关,压差传感器;
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英语翻译
急用,别人给我的一段文字,大家如果愿意帮我翻译一下:
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different不同的,相异的. differential不同的,相异的,区别的. 两者意思用法完全一致吗?
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翻译:
基因分示法很容易导致克隆出人为痕迹
注释:
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differential(微分的)形容词
还有一个:differentiable可微的