查询词典 power-free

A novel hybrid active power filterwith series resonance circuit turned at fundamental frequency is proposed,which is composed of high-capacity passive power filtersfor harmonic currents suppression as well as reactive power compensation and an active power filterfor improving filtering performance as well as overcoming resonance problem due to PPFs.

提出一种基波串联谐振式混合型有源滤波器，利用大容量无源滤波器实现谐波抑制和无功补偿；采用有源滤波器改善系统滤波效果并阻尼无源滤波器与系统阻抗之间的串、并联谐振。

According to the history development and basic values of the silent power system ,our will is necessary and inevitable to the usher in of the silent power system of ,but how usher in, how establish, writer will from the origins of the silent power system ,development, present condition our country present stage concrete the state of nation do with plain analysis, conceive to establish the silent power system that it has the Chinese state of the nation characteristic, to rise and throw the function that the brick leads the jade.

根据沉默权制度的历史发展及基本价值，我国对沉默权制度的引进将是必要的和必然的，但如何引进，如何确立，笔者将从沉默权制度的起源、发展、现状和我国现阶段具体国情做以浅显分析，设想确立其具有中国国情特征的沉默权制度，以起抛砖引玉的作用。

When the power system load in a small disturbance, the system itself to maintain the stability of the power transmission capacity, the use of automatic excitation regulator device may reduce the reactance of the generator, and then further to maintain the transformer high-voltage bus voltage constant, so compensation not only its own reactor, but also compensation for the step-up transformer reactance, thus greatly improving the power limits of generators, which greatly increased the static stability of power system.

当电力系统的负载发生微小的扰动时，系统本身保持稳定送电的能力，使用自动励磁调节装置，则可减小发电机的电抗，再进一步维持变压器高压母线的电压恒定，这样不仅完全补偿了自身的电抗，而且还补偿了升压变压器的电抗，这样就大大提高了发电机的极限功率，即大大地提高了电力系统的静态稳定。

We established abstract functional spaces, proved that the plastic deformation power rate functional is strict convex and the friction power rate functional and the tensional stress power rate functional are convex. So, strict convexity of the total power rate functional 〓 can be obtained. Further, By nonlinear analysis theory, we proved the existence and uniqueness of minimal point of functional 〓.

本文首先建立了抽象的泛函空间，证明了塑性变形功率泛函是严格凸泛函，摩擦功率泛函和外力功率泛函是凸泛函，从而得到总能耗率泛函的严格凸性，进一步地，利用非线性分析的理论，得到总能耗率泛函有唯一的极小值点。

The second part mostly analyzes the legal status of high school and the suability of higher education administrative power. During this part, the writer proposes that we should take the experiences of the France and Germany and give high school the status of artificial people of state officer. The third part introduces during which situation judicial power can interfere with higher education administrative power. Then this part sums up four aspects of high school educational administrative power which can be in the scope of judicial review of administrative actions. The fourth part mainly researches the principle during the trial of higher education administrative cases and claim that bring the basic principles of administrative law into hi...

在这一部分，笔者在借鉴法国和德国高校法律地位的基础上提出了赋予我国高校"公务法人"地位的观点，并进行了论证；第三部分首先研究了确定高等教育行政诉讼受案范围应考虑的因素，然后归纳了高校教育行政权的四个方面作为高等教育行政诉讼的受案范围；第四部分主要研究了高等教育行政案件的审理原则，提出了将行政法基本原则引入高等教育行政诉讼的主张，并在理论上进行了详细的论证；第五部分论证了高校、教育行政机关的被告地位和高校学生、高考考生的原告地位；第六部分主要从特征和分配两个角度分析了高等教育行政诉讼的举证责任。

Precision instrument: Mode of relative power of %26plusmn;0.02dB or %26plusmn;0.5%: Measuring %26plusmn;0.02dB or %26plusmn;0.5% are inside limits; Exceed measure limits to installed at 0 o'clock for %26plusmn;0.04dB or %26plusmn;1%: In the %26plusmn;0.5% of the most acute limits complete scale Power consults power outputs: 100mW precision:%26plusmn;1.2% The face plate after general technology index outputs: Imitate 0-1V(does not take digital filter wave) or calibration coefficient is amended, 1K%26Omega; outputs impedance, BNC connects contact voltage: 220V and 240Vac,+ 5%~10%, 48~66Hz power asks: Weight of the biggest 8W(10VA): Suttle 2.6 kilograms of dimension: 88mm %26times;212mm %26times;273mmgrows

精度 仪器：%26plusmn；0.02dB或%26plusmn；0.5%相对功率模式：在测量规模内为%26plusmn；0.02dB或%26plusmn；0.5%；超出测量规模为%26plusmn；0.04dB或%26plusmn；1%零点设置：在最灵敏的规模全刻度的%26plusmn；0.5%功率参考功率输出：100mW 精度：%26plusmn；1.2%一般技术指标后面板输出：模拟0-1V或校准系数批改，1K%26Omega；输出阻抗，BNC连贯头电压：220V和240Vac，+5%~10%，48~66Hz 功率要求：最大8W(10VA)分量：净重2.6公斤尺寸：88mm%26times；212mm%26times；273mm长

Although the measures such as the simulation method with detailed generator model in which the dynamic behavior of exciting system is taken into account and installing power system stabilizers in main generators of Northeast Power Grid were adopted, it was still unable to effectively verify the reasonableness of parameter setting of PSS as well as its integrated matching result, and there was not enough scientific foundation for the selection of power grid model, especially load models. Moreover, it was hard to make accurate quantitative analysis, even though the qualitative analysis, on the close extent of selected models to actual operation of power grid.

虽然采取了计及励磁系统动态行为的详细发电机模型的仿真方法、在东北电网重要发电机组上加装电力系统稳定器(power system stabilizer，PSS)等措施，但PSS参数整定的合理性及整体匹配效果无法得到有效验证，选择电力系统模型尤其是负荷模型还缺乏足够科学依据，对所选模型与电网运行实际的贴近程度也很难做出准确的定量甚至定性的分析。

This time designs the topic is 4*125MW power plant electricity preliminary design, this power plant is a topicality important thermal power plant, this factory plan installs four 125MW condensation type thermoelectricity generation unit, the aggregate capacity 500MW close middle-scale power plant scale, this institute is located middle the city.

摘要本次所设计的课题是4*125MW发电厂电气部分设计，该发电厂是一个地区性重要的火力发电厂，计划安装四台125MW凝汽式火力发电机组，总容量500MW接近中型发电厂的规模。

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。

On the basis of analysis on the dynamic frequency after power vacancy,the reason of unideal function of traditional device are dissected: it is set by using assumed load and power vacancy.The changed range of real load power and real power vacancy lead to big error.

在对电力系统出现功率缺额后的动态频率特性进行分析的基础上，剖析了传统低频减载装置动作效果不理想的原因：用假定的负荷和假定的功率缺额整定，由于实际负荷功率和实际的功率缺额变化幅度很大，而造成很大的误差。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。