电力地

The characteristics of power oscillation of UPFC installed line are analyzed from the point of view of oscillation energy function,and a damping control strategy aiming at oscillation energy descending is developed.

文献[3]基于系统的某一运行工况设计出统一潮流控制器UPFC线性附加阻尼控制器，其缺点是不能很好地适应电力系统的强非线性及运行方式复杂多变的特点。

The substation will be placed at ground level on a concrete plinth with power cable holes.

这个变电站将放在地水准平面上带有电力电缆孔的缆混凝土石柱上。

Satisfy the user's power needs.

最大限度地满足用户的电力需求。

The sensitivity of the proposed criterion is higher than that of the quondam criterion, and no floating threshold is used. It can judge the evolved fault quickly and correctly whether the power systems swing or not.

与目前所用的判别元件相比，该元件不需要采用浮动门槛，动作灵敏度较高，不受电力系统振荡的影响，能更准确有效地判断出系统是否发生了发展性故障。

That meant, as a customer service rep for the electric company, I was dispatching repairmen right and left.

那意味着，我作为一名电力公司的客户服务代表就得不停地向各处派出维修人员。

The measurement system error model analysis is introduced into power system real time network state analysis as an important part for the first time, which can improve on the state estimation quality and provide the capability to monitor the operation of the measurement system; 2. The theory and algorithm of the on-line estimation and update of measurement noise variance based on the relation between the residual variance and noise variance. The statistic properties of the sample variance are discussed and the relation between the estimation precision and sample size under given confidence level is derived; 3. The theory and algorithm of detection and identification of measurement bias are presented, which is based on the relation between residual mean and noise mean. The statistic properties of sample mean are discussed and the relation between estimation precision and sample size is derived; 4. The Givens orthogonal transformation algorithm is selected to be the essential algorithm of state estimation, the fast orthogonal transformation algorithm with damp factor and the algorithm which can handle the zero injection measurements efficiently are presented; 5. The quantity analysis theory of bad data detectivity and identifibility are presented, which describes the relation between the elements in matrix W〓 and bad data amplitude and can provide the theory base for measurement system design and valuation.

一、首次将量测系统误差模型分析做为一个环节引入电力系统实时网络状态分析中，为EMS系统增加了实时监视系统运行、修正量测系统误差模型的新功能，进一步发挥了实时网络状态分析应用软件的潜力；二、首次提出了应用样本方差在线估计与修正量测系统误差方差的基本理论，讨论了样本方差的统计性质和概率分布，推导出了样本容量、估计精度和置信度之间的关系，给出了在线估计与修正量测系统误差方差的算法；三、首次提出了应用样本均值在线检测与辨识量测偏差的基本理论，讨论了样本均值的统计性质，推导了样本容量、估计精度和置信度之间的基本关系，给出了在线检测与辨识量测偏差的算法；四、在状态估计算法设计中，以Givens变换算法做为基本算法，提出了快速正交变换阻尼因子法和可以有效地处理零注入量测的混合法，并对实时应用中的一些问题进行了讨论；五、提出了不良数据可检测性与可辨识性的定量分析理论，揭示了描述量测系统配置、网络结构与参数的残差灵敏度矩阵中的元素与不良数据的幅值在可检测、可辨识能力上的定量关系，为量测系统配置设计与评价提供了理论基础；六、综合国内外最新研究成果，采用自适应自回归预测技术和稀疏矢量技术，构造了较完善的不良数据检测与辨识算法。

Based upon master-slave- splitting iteration, rigorous solution of the whole AC/DC hybrid power system state estimation can be achieved, and different algorithms are adopted for estimation of AC and DC systems respectively.

该方法自然地将整个电力网络的状态估计问题分解成交流估计和直流估计两个子问题，通过主从分裂迭代，可获得严格的全局状态估计解。

After years of development, the product has 100 from monotony to diversification, seriation, fire hose, interior lining gun, fire hydrant, dc interface, fire hydrant box, reel, fire extinguisher box, outdoor fire hydrant, fire pump flow indicator, connectors.it, wet alarm valve, drench alarm valve, gate valve, signal, signal, sprinkler nozzle, antivirus mask, emergency lighting lamp safety, explosion-proof discussas etc categories of hundreds of specifications of products widely used in telecommunications, civil aviation, power, industry and real estate industry and other industries, experienced the test of time, market and the approval and favorable comment from user deeply.

经过多年的发展，百安的产品已从单一化到多元化、系列化发展，有衬里消防水带、室内消火栓、直流水枪、消防接口、消防卷盘、消火栓箱、灭火器箱、室外消火栓、消防水泵接合器、水流指示器、湿式报警阀、雨淋报警阀、信号蝶阀、信号闸阀、防毒面罩、洒水喷头、安全标志灯、应急照明灯、防爆地漏等十几种大类数百种规格的产品群，广泛用于电信、民航、工业、电力、房地产业等各行各业，久经市场和时间的考验，深受用户的赞许和好评。

Synchronous generators will cause self-excitation with the help of a r mature reaction,its sttor current and voltage will increase.

现代电力系统的容量、电压、长度不断增加，同步发电机就可能因电枢反应的助磁作用而发生定子电流和电压自发地增大，形成自励磁。

The use of this material produced Light-Storing spontaneous fire safety signs, by building the system, clearly and accurately shown in the emergency evacuation, fire safety in a variety of necessary information, and its function is self-luminous power system failure is more sudden its superiority, so as to emergency evacuation personnel to provide more convenience and security.

利用这种材料生产的蓄光自发型消防安全标志，通过在建筑中的系统使用，清晰，准确地显示出了在紧急疏散、消防安全中所需要的各种信息，而其具有的自发光功能在电力系统中断时更能突现其优越，从而为人员的紧急疏散提供了更多的便利和安全保障。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。