电网

Study on fault location scheme for distribution network based on wave theory.

基于行波理论的配电网故障定位方法的研究。

Its software uses system self-detecting algorithm to assure measurement channel .It uses softening hardware technique software synchronic data sampling to trace the frequency of exterior signal, in other words , it gives sampling control signals 128 times of power net's frequency .It uses Direct Digital Frequency Synthetics algorithm to transform radical sine waveform parameter table into needed current. It uses FFT algorithm to get radical waveform altitude of current ,voltage and resistor .

整个系统在软件设计上采用系统自检验算法保证测量通道可用，采用硬件软化技术--软件锁相环技术，达到对外部信号频率的跟踪，给出频率为电网工频128倍的采样控制信号：直接数字频率合成技术将基波参数表转换成需要的电流信号，采用FFT变换及基波幅度的计算方法得到被测电流、电压基波幅度和电阻大小。

Fault diagnosis layer model of distribution network based on weighted mean roughness.

基于加权平均粗糙度的配电网故障诊断分层模型。

The advantages and research advancement of the combining system with wind power and pump storage hydropower are introduced.

针对一小型模拟电网，拟定了一种风电-抽水蓄能系统的联合运行方案，并在最大化利用风电的目标下，建立了该方案的经济运行计算分析模型。

A summarization of the impact of large scale wind power on power systems.

综述了大规模风电接入电网对电力系统带来的影响。

With the wind scale of the expansion, due to the wind and the occasional random to the characteristics of wind power on the stability of power grids have been Can not be ignored.

随着风电规模的不断扩大，由于风能的随机性和间歇性的特点，风电对电网稳定性的影响已不容忽视。

And with the enlargement of the wind farm scale, the negative effects of wind power become more and more serious, and turn to be great obstacle of the further utilization of the wind resource.

随着风电场规模的不断扩大，风电特性对电网的负面影响愈加显著，成为制约风电场建设规模的严重障碍。

The tremendous electromagnetic stresses and thermal accumulation caused directly or indirectly by the short circuits will do harm to the transformer windings, such as wingding deformation.

运行于电网中的电力变压器，不可避免地将遭受各种短路故障的冲击，由于短路电流产生的巨大电动力和绕组的瞬间急剧发热，造成变压器绕组变形。

Providing professional work of have a change of luck is a basic function of the electrified wire netting in power market.

提供转运业务是电力市场中电网的一项基本功能。

With the development of undertaking of the electric electric wire netting , the pattern of national network has already taken shape basically.

随着电力电网事业的发展，全国联网的格局已基本形成。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。