电网

They have given examples such as China National Petroleum, Sinopec, power grid companies, the Electric Power Supervisory Committee or other specialist industry bodies, highlighting that all of these bodies are vice-ministerial, ministerial or above.

中国能源专家说，这个司局级的能源局级别太低，相对应的是，不管是中石油、中石化还是国家电网公司等企业，还是电监会等专门的行业机构，都是部级建制。

Combined with the reality of Shanghai power network,a kind of new fault diagnosis device for WH type ring network cabinet was introduced.

结合上海电网的实际，介绍了一种新型的WH型环网柜故障诊断装置。

As thebiggest hydropower station of two-row placed units in the world, LijiaxiaHydropower Stationinstalled capacity 1600(4×400MWof Yellow River upstreamis the chief station for hump modulation and frequency modulation in northwest area.

李家峡水电站是目前世界上最大的双排机水电站，装机1600(4×400)MW，是西北电网中的骨干调频、调峰电厂。

With analysis on the control model, an improved automatic tuning method for arc-suppression coil is proposed, that is: adopting voltage feed forward control to restrain interfere of 50Hz displacement voltage, which can improve the characteristic of the injected signal significantly, make the injected signal without reference to unbalanced network and neutral displaced system. Another innovation is detecting the magnitude of neutral point signal-frequency voltage to judge the resonant state, which improves the sensitivity and accuracy of resonant judgement effectively.

基于对控制模型的分析，提出了一种新的注入变频信号的消弧线圈自动调谐方法：通过电压前馈校正控制的引入，有效抑制了50Hz工频电压对注入信号的干扰，使得注入信号不受电网不对称及中性点位移电压的影响；提出以中性点注入信号电压幅值最大做为新的谐振判据，有效提高了谐振状态判断的灵敏度和准确度。

Furthermore, the dynamic resonance adjustment method is as follows: measuring capacitive current in real-time when the grid operates in normal, tuning arc-suppression coil and making it compensate for the capacitive current completely when single-phase-to-ground fault occurs.

引言消弧线圈的作用是当电网发生单相接地故障后，提供一电感电流IL 补偿接地电容电流IC，使接地电流减小，也使得故障相接地电弧两端的恢复电压速度降低，达到熄灭电弧的目的。

Geo-magnetically induced currents are triggered by geomagnetic storms, the frequency of which ranges from 0.001 Hz to 0.100 Hz. GIC will cause DC bias saturation of transformers, unnecessary relay tripping and blackouts.

中文摘要：磁暴在输电线路引发的地磁感应电流频率为0.001～0.100 Hz，这种准直流的GIC将造成变压器直流偏磁饱和，引发电网保护误动作和停电事故。

An adaptive zero-sequence trip protection ground system in 110 kV and above power grid was introduced.

介绍了110kV及以上电网自适应零序电流速断保护接地系统。

The main research aim and direction of transmission tower is to achieve its safety and economics.

特高压电网的建设、输电新技术的推广应用给输电线路杆塔的研究提出许多新的课题，安全可靠、经济合理是杆塔结构研究的主要目标和方向。

Interconnections to neighboring power systems are usually formed at the transmission system level.

与相邻电网之间的连接组成了电力传输系统。

Reactive power compensation is an effective method to reduce the loss of power grid and raise the efficiency of transmission.

无功补偿是降低电网损耗，提高配电效率的有效手段。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了