电网

Lastly, the communication mode and the communication protocol of the communication system in DAS are discussed.

最后，论文讨论了配电网通信系统的通信方式和通信规约的选择，提出了一种基于Internet的通信方式。

On the foundation of this model, the deadbeat control algorithm and the robust control algorithm have been present.

针对目前控制方法中存在的问题，将UPQC视为一个整体，建立抽象出包含UPQC与电网、负载的统一数学模型。

According to the characteristics of subarea control and interlayer control of AVC,the reactive power optimization based on the principle of decomposition coordination in provincial grid is proposed to better improvement the astringency of algorithm,calculation speed and disposal of discrete variables.

针对AVC分区、分层控制的特点，提出在省级电网实现基于分解协调原理的无功优化，以期在算法的收敛性、计算速度以及对离散变量的处理几方面有明显的改进。

The essential of this method is the model and algorithm of a parallel fast decoupled load flow with coarse-grain spaces based on the decomposition and coordination principle of large-scale networks.

该方法的核心是基于大规模电网分解协调原理的粗粒度空间并行快速解耦潮流模型和算法。

The core of this parallel algorithm is the models and algorithms of coarse-grain space parallel fast decoupled load flow and coarse-grain space parallel linearized load flow proposed in this dissertation based on the decomposition and coordination principle of large-scale networks.

该方法的核心是基于大规模电网分解协调计算原理，本文提出的粗粒度空间并行的快速解耦潮流模型及算法和直流潮流模型及算法。

Therefore the establishment of the model of DEH system and the identification of its parameters are significant for the steady analysis of the electric network.

所以调速系统模型的建立和参数的正确辨识对于电网的稳定分析具有重要意义。

Along with the fast development of the power system,DEH becomes the essential control system for stream turbines,especially for large stream turbines.

随着电力系统的飞速发展，电网正在向电压高、距离远、容量大的方向发展，单元机组的运行方式也更趋复杂。

The main achievement is as following: Present a new software structure with insert mode based on diagram and data platform. With this structure the software can be used in various voltage levels of power networks by switching function groupware with corresponding edition. Therefore it is important to solve software universality and developability.(2) Present a new idea that any operating condition is combination of running mode of plant or station, power supply topological and rules of equipment maintenance. This idea is very useful at simplifying setup and choice of operating conditions and ensuring calculation result correction.(3) Present a new idea of protection setting examination and rectification. Protection setting examination is used to examine the selectivity、 sensitivity and speed under certain operating condition, and pass an opinion whether these settings are wrong;Setting rectification is used to calculate new relay settings when error is found in setting examination.(4) Point out that interaction design is the key step in developing power system application software,which can secure usability.

主要成果有：(1)提出了以图形/数据平台为基础的插件式软件结构，通过配置不同版本的功能插件即可应用于不同特点的电网，对解决软件的通用性和可发展性具有重要意义；(2)提出了基于厂站方式、供电方式和检修规律相组合的运行方式分解方法，它能有效提高运行方式选择的合理性与全面性，使定值计算的正确性得到保障；(3)提出了保护定值校正的思想并进行了软件实现，它能检测当前保护定值在选择性、灵敏性、快速性等方面是否适合当前的运行方式，并对不正确的定值进行纠正；(4)指出交互设计应作为电力系统应用软件开发中的一个关键步骤，目的是保证软件的可用性，并对软件开发的过程进行了总结，提出了许多有益的实践经验。

The effect of DG to the distribution network voltage profile is analyzed in a quantitative manner.

定量分析了分布式发电对配电网电压分布的影响。

In China much attention has been paid to the application of the High Voltage Direct Current transmission.

直流输电方式及其相关技术在我国电网建设中已得到越来越广泛的重视。

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。