电网

However, it also marks the biggest foray overseas for State Grid, one of China's largest companies through its control of 80 per cent of the country's power transmission assets.

不过，这也是中国国家电网规模最大的一笔海外交易。国家电网是中国最大的企业之一，控制着中国80%的输电资产及部分发电资产。

The TCR firing angle can be fully changed within one cycle of the fundamental frequency, thus providing smooth and fast control of reactive power supply to the system.

即不管负载的无功功率如何变化，总要使二者之和为常数，这个常数等于电容器组发出的容性无功功率的数值，使取自电网的无功功率为常数或为0，即：=常数（或0），最终使得电网的功率因数保持在设定值，电压几乎不波动，从而达到无功补偿的目的，以抑制负载波动所造成的系统电压波动和闪变。

Finally it is verified that the reactors cannot be used in the control of the 220 kV grid short circuit current.

最大限度地提高220kV分区电网的可供电容量，首先要解决的是220kV电网

According to the development plan of North China Grid and the short circuit current increasing cycle and period of Beijing-Tianjin-Tangshan Grid,rational control scheme of short circuit current and countermeasures are put forward.

根据华北电网的发展规化，针对京津唐电网短路电流增长的周期性和阶段性，提出了合理限制短路电流水平的思路和对策。

The Influences of EHV grid on the short circuit current and reactive compensation in Fujian power grid and the opening of electromagenetically coupled power loop of 1 000 kV and 500 kV are discussed.

分析了特高压电网对福建电网短路电流和无功补偿的影响以及1 000 kV/500 kV电磁环网的解环等问题。

During construction of our country's ultra-high voltage power grid, both electromagnetic loop circuit and stressed long UHV transmission passage may lead to low frequency power oscillation.

在我国特高压电网建设过程中，高低压电磁环网和重载的长距离特高压送电通道，都可能导致电网发生低频功率振荡。

By adding an equivalent harmonic impedance in the branch circuit of power grid, this HAPF could force all the harmonic currents flow into passive power filters, which resulting in eliminating harmonic contamination more effective. And using the capacitive feature of PPF in the fundamental frequency, this HAPF could compensate fixed-capacity reactive power without increasing APF's burden. Moreover, in order to decrease APF's cost, the fundamental voltage will largely be endured by capacitor in view of the series resonance circuit tuned at the fundamental frequency, so the APF just bears little harmonic voltages.

其基本工作原理是：有源部分等效于在电网支路中串联了一个谐波阻抗，该谐波阻抗对基波电流不起作用，而对谐波电流产生很大阻碍作用，迫使谐波电流流入无源滤波器，从而达到滤除谐波的目的；同时新型注入式混合有源滤波器还充分利用了无源滤波器的无功补偿功能，在不增加有源部分容量的前提下，可以提供一定容量的无功功率；由于有源部分承受的电网基波电压不大，也没有基波电流流入，因此逆变器容量小，初期投资较小。

Finally the suggestion on applying some SHG methodology to current bulk grid construction and operation is put forward.

最后，提出了将某些自愈电网方法应用于当前大电网建设和运行的建议。

At last, based on post-evaluation of process, in allusion to several problems of current power grid construction, the paper suggests that the PMC pattern is one kind which

最后，在过程评价的基础上，针对目前电网建设管理中存在的一些问题，提出PMC模式是一种适合我国国情的电网建设管理模式，并基于全面成本管理的思想，对项目公司与PMC承包商之间的激励约束问题做了进一步探讨。

A new design scheme of hand-held power harmonic analyzer based on LabVIEW DSP module is presented.

治理谐波的先决条件是从电网中方便、实时和准确地对电网谐波含量进行测量与分析[1]。

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