以下为句子列表：
英文: And networks pervade technology: the Internet, power grids and transportation systems are but a few examples.
中文: 网络也普遍存在科技之中，像是网际网路、电力网及运输系统等等。
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英文: Harmonics, reactive power, voltage flicker and negative-sequence current of power grids can affect the power quality and harm the power equipment badly.
中文: 摘要电网中存在谐波、无功、电压闪变及负序电流等问题，严重影响电能质量，危害电力设备。
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英文: Hebi hasreliable power grids with over 2000 mva substation capacity and 5.5 billion kw of annual power supply.
中文: 城区内供电能力充足，电网结构合理，自动化水平高，供电可靠性强，年供电量55亿千瓦时，变电容量2000多兆伏安。
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英文: It also could clog railway lines and ports and trigger brown-outs as overloaded power grids collapse.
中文: 同时如果电网负荷过重，还可能导致铁路和码头无法正常运行从而引起城市供电不足。
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英文: To put into operation a large amount of non-linear load, make in harmony wave of rural power grids serious becoming in pollution, pass to rural local electric wire netting main in harmony analysis of wave source, put forward in order to restrain from inse
中文: 摘要大量非线性负荷的投运，使农村电网的谐波污染日趋严重，通过对农村地方电网主要谐波源的分析，最终提出了以限制接入农村电网的谐波源的电压总谐波畸变率和各次谐波电压含有率为目标的增加换流装置脉动数，以及在谐波源附近装设小额定值的电力有源滤波器配以无源滤波器的混合型电力滤波方式，以进行谐波治理。
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