电网

As the main analysis tool for the control decision table of distributed security and stability control system in Shandong 500 kV Power Network, EEAC makes the project more efficient.

EEAC法作为山东 500 kV电网分布式安全稳定控制系统策略表的主力分析软件，极大地加快了工程进度，提高了工作效率。

As the main analysis tool for the control decision table of distributed security and stability control system in Shandong 500 kV Power Network, EEAC makes the project more efficient.

本文将EEAC应用于山东电网安全稳定控制分析的工程实践中，极大地提高了工作效率。1

Key words: electric power system and automation; unified modeling language; CASE tool; Geodatabase; distribution network

关键 词：电力系统及其自动化；统一建模语言；CASE工具；空间数据库；配电网

From Edison's 220-V three-wire dc grid to 4-kV single-phase and 2.3-kV three-phase transmission, ac transmission voltages in the United States have risen progressively to 150, 230, 345, 500, and now 765 kV.

从爱迪生的220V三相直流电网到单相4kV和三相2.3kV输电，美国的交流输电电压已经逐步上升到150，230，345，500和现在的765kV。

Based on these, the author suggests that Electric Power System of the urban transportation should be equipped with Three-branch Filter or active harmonic Conditioner.

在此基础上，明确指出轨道交通供电系统应安装滤波装置或者有源滤波装置，这不但可以大大地减小对电网的影响，也可以提高自身系统的运行质量和可靠性。

The experimental set for 330kV tank circuit breakers has been set up and the possible factors influence the relationship between the environmental temperature and moisture in SF6 gas.

以西北电网330kV罐式断路器为例，建立实验装置，研究SF6气体压力、断路器罐体大小、20℃时SF6气体中起始水分含量和断路器内固体材料对环境温度与SF6气体中水分含量间关系的影响。

The series resonance type fault current limiter has the advantage of simple operating principle and topological structure etc. It may be designed with serial compensation following the condition of the electrical network. However, from the simulation, we draw the conclucion: in the process of restraining fault current after a fault occurrence in electrical network, capacitor and parallel inverter switch will stand for poor working condition.

串联谐振式限流器具有工作原理、拓扑结构简单等优点，并且可以根据需要设计成带串补型，但通过仿真分析得出：其在电网发生短路故障进入短路限流工况过程中，其电容器及并联转换开关将工作在相当恶劣的条件下。

The method of fault analysis for six-phase transmission is very complicated, and the research on the protective scheme for six-phase transmission lines is few at the present time, and it had badly confined the practical application of six-phase transmission.

在我国由于耕地面积的减少和地理环境的制约，节约线路走廊占用空间，提高线路的功率传输密度已经成为电网建设需要考虑的一个重要因素，在这方面六相输电方式有着独特的优势。

Study on error code performance of relay protection signal over optical fiber channel ;2. Some suggestions for the protection with the optical fiber channel construction and the maintenance are proposed.

分析了山西电网中以光纤作为保护通道的优越性，针对不同的线路保护采用不同种类的光纤保护方式，并对光纤保护设备在安装、调试及日后维护过程中出现的问题进行分析，为保护用光纤通道的建设及维护提一些建议。

For a class of Shunt-wound Active Power Line Conditioner, based on analysis of mathematical model of system and target of control, the algorithm of fuzzy variable structure sliding mode control is presented. The control algorithm can avoid complicated calculation of harmonic electric current in traditional control algorithm, and realize the feedback control of electric current. The algorithm is simple and easily implemented.

针对一类并联型有源电网调节器在分析系统数学模型和控制目标的基础上，提出了模糊滑模控制策略，避免了传统控制方法中复杂的谐波电流计算，实现对电源电流的闭环控制，该算法简单、易于实现，仿真结果证实了变结构滑模控制的有效性。

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