电网

Firstly, according to the operating features of tie-line, the key decision factors deciding the operating mode of tie-line are extracted, a rule base of definition of tie-line operating modes is established and a discriminative model of tie-line operating modes is proposed; then during the design of the interface with data of EMS, the flow sheet for tie-line power flow monitoring is optimized; finally, an on-line monitoring system for tie-line power flow, which possesses the functions such as definition of tie-line operating mode rule base, transmission line operating mode monitoring and tie-line power flow monitoring, is developed, and the developed system can provide report forms of statistical analysis on transfinite record of tie-line power flow.

结合电网断面的运行特点提取了决定断面运行方式的关键因素，建立了断面运行方式定义规则库并提出了断面运行方式判别模型。在与EMS的数据接口设计中，对断面潮流监测流程进行了优化。在此基础上开发的电网断面潮流在线监测系统具有断面运行方式规则库定义、线路运行状态监测及断面潮流监测等功能，还可提供断面潮流超限记录的统计分析报表。

The invention relates to the method and system for remote monitoring the transient falling voltage of electric supply of electricity network.

一种电网市电电压瞬时跌落的远程监测方法及系统属于电网市电电压监测领域。

In this paper,the truncated error of trapezium methodis analyzed under ideal state of electrical power parameters,a sin function,when sampling digital measurement and the relationship between the error and the amount of sampling points is offered.

对电力参数的理想情况采样数字化测量的典型算法的截断误差进行了分析，给出了误差与采样点数的关系；根据国家关于电能质量和公用电网谐波的标准规定，对非正弦状态下的误差也做出了符合实际的估计；在电网正常情况下截断误差与采样点数的关系与理想波形时相同。

The short-circuit current in some parts of Shanghai Power Grid that is the receiving end of East China Power Grid exceeds limits, which forces the structure and the operation modes of the 500 kV grid to make some adjustment, and the 500 kV double-loop-network is compelled to uncouple in certain conditions.

作为华东电网的受端的上海邵分厂站500 kV短路电流的超标，迫使500 kV电网结构或运行方式做出相应调整，500 kV双环网在一定情况下被迫解环。

These researches can improve the wind development in scale and in order, which are beneficial to our wind industry.

提出了电网对风电大规模接入应在协调电网规划、风电与其他电源协调发展等方面采取的相应措施。

The efficiency gains achieved by upgrading to a smarter grid from a conventional grid would be like switching from a typewriter to a word-processor.

通例电网更新改造为智能电网，就好比打字机换成电脑文字处理体系。

Manufacturing center Jiangxi province has put the power grid on yellow alert, the second level of four stages of severity.

制造中心江西省已经发布电网黄色预警，电网告急分为四个级别，黄色为第二级。

It is introduced that harmonic current in the electric network and harmonic current detecting method based on instantaneous reactive power theory in the paper,and then it presents the current detecting method in the anisomerous mains voltage,aberrance circuit based on instantaneous reactive power theory .

通过对电网谐波和瞬时无功功率理论在谐波检测中应用的分析研究，作者给出了基于瞬时无功功率理论的检测方法在电网电压不对称、存在畸变时的电流检测方法。

The majior contributions are summarized as follows:1. Enhanced the concept of min-max transfer capacity, which is the conservative transfer ability against the optimistic transfer ability that ATC evaluates.2. Constructed a TRM model of bi-level optimization based on leader-follower decision-making model, and an analytic method of computing TRM is proposed. A bi-section search algorithm simplifies and speeds up the calculation.3. Proposed the min-max transfer capability model considering steady voltage stability. The BiGA algorithm used in this model is shown to be robust.

本文针对这些问题，补充、提出了一些方法和见解，具体研究成果如下：1、针对ATC评估的是&乐观&情况下电网输电能力，提出了&保守&情况下的电网输电能力-至少传输容量的概念。2、提出基于主从决策的TRM双层优化模型，给出了TRM计算的解析方法，两次一维搜索的算法减小了TRM求解的难度，提高了计算速度。3、提出考虑静态电压稳定约束的至少传输容量评估模型，针对模型特点提出的BiGA算法具有较强的鲁棒性。

To advance the effectuality and adaptability of grid safe reliable analysis, The paper study specially the influence about the small-load generators used excitation system based on detailed models to the 220kV main grid through the BPA soft and theory reasoning .

为了提高电网安全稳定分析的有效性和适应性，本文使用中国版PSD-BPA 稳定分析程序，针对2006 年安徽电网从110kV 接入系统的小机组励磁系统详细模型对 220kV 主网安全稳定水平的影响进行了专项研究。

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。