电网

In this paper, typical physical topology and its characteristics of low-voltage network are analyzed in detail, topology model of power line communication over low-voltage network is given for simulation, and the means based on Ant Colony Optimization is put forward, which is used to construct the power line communication networks without any available information of power line wiring in a building On the basis of these, the effect and anti-destruction means are analyzed and tested by emulating experiments.

该文详细地分析了典型低压配电网物理拓扑结构和特点，给出了低压配电网通信仿真拓扑模型，提出了一种适用于未知建筑物电力线拓扑结构条件下的蚁群电力线组网方法；在此基础上，通过仿真试验验证了该组网路由算法的有效性和抗毁性。

It not only can make the normal calculation of current, but also can make static and motional simulation calculation of all kinds of breakdown.

它不仅可以进行电网正常的潮流计算，还可以对电网的各种故障进行静态和动态过程的仿真计算，为调度员进行事故处理和合理安排运行方式提供依据。

The weighted moving average method and GM(1,1) model to forecast the sales of electric energy in North China Power Grid respectively are used,then the forecast result by the way of the Matlab software is given.

为提高电网负荷预测的准确率，分别运用加权移动平均预测技术和GM(1，1)模型对华北电网的售电量进行了预测，借助Matlab软件，得到了预测结果。

Along with the development of regional power network, the structure of network becomes more and more complicated.

随着地区电网的不断发展，电网结构日趋复杂，用户对于电能质量的要求也日益提高。

If the output grid operators qualified in their area of operation of domestic offtake by the nearest national transmission grid operators to take up this duty.

若有输出资格的电网运营商在其区域内不经营国内转输，则由距离最近的国内传输电网运营商承担此义务。

For eliminating the hidden danger caused by the misiperation in the present operation law and flow, the system will manage the operation rule and the operation course by the computer, at the same time verify the validity of every operation step of every course to avoid operation mistake as a result of the carelessness of operator or the change of the operation mode.

本文所建系统针对供电公司现有操作制度和工作流程中的隐患，利用科学的算法和规则进行安全校验，避免了电网操作过程中由于人的疏忽和电网的变化而引起误操作的发生。

The matrix of path reflects construction cost of connected line of distribution network.

在此基础上，进行配电网的联络线优化，实现中压配电网闭环设计的要求。

Maximum expected voltage unbalance at PCC during normal operation of the grid: Voltage unbalance defined as relative value of negative phase voltage component, expressed in percentage of positive voltage component.

电网正常运行电网接入点预计的最大电压不对称：不对称电压的定义为负相电压分量的相对值，用正电压分量的百分数来表示。

When voltage quality problem appears,it is necessary to find out the reasons caused by power system and electricity user.

当电网电压质量出现问题时，从电力用户方面查找原因并加以治理是必要的，但同时也要考核电网状况。

The model is given out after having studied the existing measure of secure and stable control and summarizing the lack of itThis model is based on the on-line emergency control framework of "On-line Preconceive Calculation and Real-time Matching" of EEAC and performs the effective control of system through the integration of the Whole Model Stability Quantification Analysis Software with EMS and the Area Energy Stability Control System.

这种安全稳定控制是将全模型稳定定量分析软件、电网EMS系统和区域电网稳定控制系统三者有机地结合在一起，对系统实现有效的控制。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。