查询词典 power base

SD series power inverters for tale communication facilities are devices that invert mains supply and battery power into uninterrupted and filtered AC power to provide computer and other electric equipment with continuous power supply in the case of unstable mains supply and power failure.

SD系列通信逆变电源设备是一种将市电及电池的电能转化为不间断的、净化的交流电能的变换装置，用以给计算机和其他电气设备提供可使用的连续交流电源，以备市电的不稳定及断电。

The result shows that, the Direct Power Supply Model is inexorable selection of the whole social and economic development and the Yangtze River Power Corporation development. It also assesses one proposed strategy and finds that the active participation in price competition for networking, may help display the obvious low cost advantage of the hydropower enterprise, and the strive for direct power supply may afford more opportunity for the low cost enterprise to touch some of the end users. This not only helps to break the monopolized (currently an actually single agent) power purchase system, but also creates a policy advantage which helps the local areas to directly use the local water resources to develop large industries (for adjusting the industrial structure, increasing employment and especially for the relocation of emigrants). It also helps to develop the regional economy. Besides, this strategy will also promote the cooperation with other related enterprises, and thus promote the development of a multiple-element industry. Because the Direct Power Supply Model can make the low cost hydropower firm master partly terminal customers, then it is a normous chance for the low cost hydropower firm.

研究结果表明，直供电商业经营模式是中国整个社会经济发展和长江电力公司企业发展的必然要求和选择，在理论和实践也是切实可行的；直供电商业模式不局限于定向"电力公司"——电网购电客户，也应可约定直接向大用户，这样可以使低成本的水电公司有机会掌握部分终端客户，这除了可以打破当前实质上的单一主体的垄断购电体制外，还可以为直接利用当地水能资源、发展大工业、调整产业结构、增加就业尤其是安置移民、进而创造相当的政策性优势，进而促进区域经济发展，同时，还将有利于促进本企业与有关企业合作，发展相关多元化产业；由于直供电商业经营模式可以让低成本的水电公司掌握部分终端客户，所以对低成本的水电公司是一个巨大的机遇。

For this purpose, the minimum modulus eigenvalue of power flow Jacobian matrix of AC/DC power system is researched; by means of the sensitivity index of nodal voltage to reactive power variation and combining with participating factor, the bus or region where the voltage instability could happen most possibly are judged to provide decision-making foundation for the configuration of reactive power compensation device in power system.

该方法研究了交直流系统潮流方程雅可比矩阵的最小模特征值，以节点电压对无功功率变化的灵敏度为指标，结合参与因子，判断全电网中最有可能发生电压不稳定的节点或者区域，从而为系统无功功率补偿装置的配置提供决策依据。

The authors research the algorithm for power system static voltage stability. Taking the modulus minimum eigenvalue of power flow Jacobian matrix as the criteria to weigh the weakness of power system, the active power injected into nodes equivalent is substituted by equivalent conductance to ground as well as the reactive power injected into nodes is substituted by equivalent susceptance to ground.

研究了电力系统静态电压稳定性算法，以潮流雅可比矩阵最小模特征值的大小作为衡量电网薄弱程度的标准，以等效对地电导代替节点注入有功功率，以等效对地电纳来代替节点注入无功功率。

The article presents the cause of the formation of market power in electric power market, the relation between scarcity and market power, and the analysis methods of market power, enumerates several mitigatory measures of market power and analyzes advantages and disadvantages of them.

对电力市场中市场势力的形成原因、市场势力与稀缺性的关系以及市场势力的分析方法进行了研究探讨，列举了几种平抑市场势力的方法，并对各种方法的优缺点进行了分析，为我国电力市场的规范发展提出了建

In recent years, SiC FET power transistor and GaN high electron movability power transistor represent the third generation semiconductor-wide bandgap semiconductor power devices, have advantages of high breakdown voltage, high power density, as well as high output power, high operation efficiency, high operation frequency, wide instant aneous bandwidth, operation in high temperature environment and strong ability of resisting radiation.

近年来以SiC场效应功率晶体管和GaN高电子迁移率功率晶体管为代表的第三代半导体－宽禁带半导体功率器件具有击穿电压高、功率密度高、输出功率高、工作效率高、工作频率高、瞬时带宽宽、适合在高温环境下工作和抗辐射能力强等优点。

Therefore, this thesis raises "commercial power and DC remote power supply" which is off-line power mode of Uninterruptible Power Supply to resolve the problems of PAS CS power failure.

为此本文提出以"市电+直流远程供电"离线式UPS电源，解决小灵通基站停电问题。

For the current situations that electrical power operation environment is more complex, the power organization reformconstantly, the electricity market is formed step by step, the current electrical equipment is outdate, and for the so many problems that lowenergy efficiency, poor power quality, less interaction between customers and power grid company, this paper defines the smart grid that is suited to China's power grid situation, and summarizes five features for the smart grid such as self-healing, interactive, optimization,compatibility, integration and the differences between smart grid and traditional grid, then introduces the four systems of smart grid and two foundations before building the smart grid, and finally concludes that smart grid is the inevitable result for the economical and technological development.

针对目前电力运行环境的日趋复杂、电力体制改革的不断前进、电力市场的逐步行成、现有的电力设备亟待更新、能源利用率低、电能质量差、用户与电网公司交互作用少等诸多问题，讨论了适合中国电网情况的智能电网的定义，总结出了智能电网自愈、互动、优化、兼容、集成五大特点，概括出了智能电网和传统电网的区别，并详细介绍了构成智能电网的四大体系和建立智能电网的两大基础，最后总结出智能电网是经济和技术发展的必然结果，我国应加快智能电网的研究发展。

Let us therefore consider a master of a family with all these subordinate relations of wife, children, servants, and slaves, united under the domestic rule of a family; which, what resemblance soever it may have in its order, offices, and number too, with a little common-wealth, yet is very far from it, both in its constitution, power and end: or if it must be thought a monarchy, and the paterfamilias the absolute monarch in it, absolute monarchy will have but a very shattered and short power, when it is plain, by what has been said before, that the master of the family has a very distinct and differently limited power, both as to time and extent, over those several persons that are in it; for excepting the slave (and the family is as much a family, and his power as paterfamilias as great, whether there be any slaves in his family or no) he has no legislative power of life and death over any of them, and none too but what a mistress of a family may have as well as he.

所以，让我们在家庭规则之下来考虑家庭的主人与所有妻子，孩子，仆人和奴隶的从属关系；家庭，无论在它的秩序，各种职务以及人数方面多么的类似于一个小国家，然而在它的构造，权力和目的方面与国家是相去甚远的：或者如果一定要把它想成一个君主国，家长是绝对君主的话，这个绝对君主国也仅仅拥有零碎和短暂的权力，因为根据前面的论述，很明显：家庭主人对其余人的有限权力，无论在时间上还是在范围上与君主的权力都是截然不同的；因为除了奴隶，他没有对任何人的生命和死亡拥有立法的权力，女主人也同样没有。

The voltage and the sensitivity of voltage to system operation parameters are calculated by Newton power flow approach; the various higher order derivatives of voltage and voltage sensitivity to line openbreak parameter can be obtained by using the convergent correction equation of power flow and the equation of calculating sensitivity for the N power system. Finally, the voltage and sensitivity of N-1 power system can he calculated by correcting the voltage and sensitivity of N power system by Taylor series expansion.

通过牛顿潮流计算出N网络的各节点电压及其对系统运行参数的灵敏度；利用已收敛的潮流修正方程式和N网络灵敏度计算方程式分别对线路开断参数多阶求导，从而计算出电压和灵敏度对此线路开断参数的多阶导数值；根据泰勒级数展开式修正N网络的电压和灵敏度值，得到N-1网络的电压和灵敏度值。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。