电力调度数据网作为电网生产控制大区最重要的传输载体,在电力系统中得到了全面的应用,所面临的网络安全风险与日俱增.阐述了对电力调度数据网进行安全加固的必要性,分析了访问控制、加密认证等安全加固措施的原理、作用及实现方法.最后介绍了安全加固技术在常德电网的应用,验证了这些措施的安全性和可行性.

1 调度数据网管理机制构建的背景 随着调度数据网在公司系统的全面推广应用, 调度数据的通信形式发生了重大变革.与传统专线模拟通道相比, 调度数据网具有易维护、成本低、良好的安全性和可靠性等优点.调度数据通信方式朝着网络化方向发展已成既定趋势, 然而地区调度数据网在可研设计、安装调试、运行检修、竣工验收等环节仍存在诸多问题.

简单介绍异步起动稀土永磁同步电动机原理及设计,并通过测试数据和用户使用效果来分析说明稀土永磁同步电机节能应用特点及注意事项。

The principle,structure and development process of asynchronous soft starting of high efficiency rare earth permanent magnet motor were introduced,many problems such as large starting current,big vibration,difficulties in starting,etc.which exist in the use of the ordinary asynchronous starting of rare earth permanent magnet synchronous motor were analyzed,and puts forward the way to deal with such kinds of situations.The asynchronous soft starting of high efficiency rare earth permanent magnet motor,can retain the high force performance of the ordinary asynchronous starting of rare earth permanent magnet synchronous motor,meanwhile it can also improve a lot in the starting performance of the motor.

<正>随着全球经济一体化进程的加快和知识经济时代的来临,发展高新技术企业是调整经济产业结构、培养新的经济增长点、转变经济增长方式、提高经济实力和市场竞争力的惟一途径。然而,由于高科技产业化过程本身所蕴涵的技术因素和风险,使绝大多数高新技术企业在创业初期因无良好的业绩、

Based on analysis of T-s haracteristics in the starting process of REPWSM and the skin effect how to affect the rotor parameters,the new method improving the integrated starting performance of REPWSM was proposed.In this method many measures were adopted such as:designing deep slot shape of rotor to obtain a high,flat and stiff slip-torque curve;adopting half or few pole pairs of stator windings to start motor in high slip and weaken generating or break torque.Experiments on the prototype verify the advantages of above design measures.

稀土永磁同步电动机是一种超高效节能电机,我所生产的XYT系列稀土永磁同步电动机其效率超过美国高效电动机的标准.从原理上讲,稀土永磁同步电动机要比感应式异步电动机损耗小、效率高;但若缺少合理的设计方案、得当的工艺措施、以及优质的电磁材料同样生产不出高品质的产品,本文就此加以讨论.