电网

Situation of power grids and user requirements..

虚线链接的设备是根据电网实际情况和用户的要求可选择的通信方式。

Simulation results of North China Power Grid show that the proposed method is practicable and effective.

华北电网系统的仿真结果表明了该方法的实用性和有效性。

The method is to setup distribution application functions foundation class library. By using foundation class library, the developing work can be simple and the migration jobs are predigestion.

本文在对国外DMS应用功能进行全面分析和总结的基础上，首次针对我国的配电网发展情况确定了适合我国需要的DMS应用功能。

Then the result will accord with fact.(3) According to the network data and power supply data provided by A power company, this dissertation forecasts power supply of the power company and 12 presidial power supply bureaus in 2006 first. Second, make use of the BP ANN to forecast the base quantity of line loss rate of 12 power supply bureaus and A power company in 2006. Then modify the base quantity by the amount of some items.

3以A市电网的数据为例，首先结合常规负荷预测的单耗法和弹性系数法，来预测2006年A市电力公司和所属12个供电局的供电量；然后再用论文的神经网络方法来预测2006年12个供电局和电力公司的线损率；最后对影响线损率的主要规划项目进行定量线损分析，并将其用来修正神经网络预测结果。

According to accidents caused by disqualification of transformer pressure relief valve in power systems operation,a series of digital test systems were developed to suit for different pressure relief valves. Also the working principle and performance of this system were introduced.

针对电网实际运行中由于变压器压力释放阀的质量问题导致的事故，建立了一套适用于不同规格压力释放阀的数字式测试系统，介绍了其工作原理以及性能。

Integrating C-type of traveling wave location method with AC signal injection method, a compositive location method for single-phase earth fault in 35kV distribution network is proposed, in which firstly the fault is presumedly located by C-type of traveling wave location method to preliminarily determine the position where fault occurs; then the fault is accurately located by AC signal injection method.

基于C型行波法和交流信号注入法提出35 kV配电网单相接地故障的综合定位方法：首先采用C型行波法进行初步定位，确定故障距离和故障所在区段，然后用交流信号注入法进行精确定位。

The difficulties during developing this technique is that dielectric loss tangent measured is very small, and many factors influence the high-precision measuring, such as the excursion of the primary wave on power line, the existence of the harmonious wave, and the electromagnetic interference in the field and so on.

该检测技术的难点在于待测介质损耗角很小，电网基波频率不稳、高次谐波的存在以及现场电磁干扰等因素都会影响测量准确度的提高。

And then the author makes the probability analysis model considering the needs and features of the predictive analysis.

然后从预测分析的需要和特点出发建立了电网连锁故障的概率分析模型。

To solve problems on the urban power network planning,an immune genetic algorithm based on selection probability of similarity and vector distance is developed in the paper.

首次提出基于相似性矢量距选择概率的免疫遗传算法来求解城市高压配电网规划。

As part of the deal, State Grid will pay C$152m for a 9.9 per cent stake in Quadra.

作为协议的一部分，国家电网将出资1.52亿加元收购Quadra 9.9%的股份。

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。