查询词典 power-driven

Taking the harmonic attenuation of the 10KV power distribution network at the 110KV substation in a smeltery as object of study, this dissertation aims to do research on the control strategies and its industrial application technologies for eliminating harmonic in medium and high voltage power network, prepare theory and teclinological knowledge for its universal application in our country, and accumulate experiences for its high-voltage and high-power application.

本文以某冶炼厂110KV变电站10KV馈电网的谐波治理为研究对象，旨在研究中压、中等容量电网的谐波治理控制策略和工程应用技术，为有源电力滤波器在国内的早日普及应用奠定理论和技术基础，为高压、大功率APF的应用投石问路、积累经验。

For reducing the LEMP lighting electromagnetic pulse radiation, the electrical source uses the Box-type power supply arrester, the power supply arrester and the modular power supply arrester as the third SPD surge protection device. The Low-voltage surge arrester or spark gap is laid between the compute net and equipotential grounding grids for avoiding signal interference and counterattack of ground voltage. The parameter and model of the signal lighting-protector of lines of communication are chosen according to the transfer rate, work level and characteristic impedance.

对控制房和DCS柜采用避雷针、独立针的直接雷防护；系统电源分别采用箱式电源避雷器、电源避雷器、模块式电源避雷器作为三级电源保护，减少LEMP雷电电磁脉冲辐射；计算机网络与等电位地网间设置低压避雷器或火花隙防止信号干扰和避免地电压反击；根据传输速率、工作电平、特性阻抗等，选择通信线路的信号防雷保护器的参数和型号。

On the basis of SPInet(State Power Information Network), electric power enterprises of all kinds use assistant operating system to some degree, for example, financial software, management information system, power fee management system etc.

在采用国家电力公司信息网的基础上，各省区县电力企业虽然都不同程度地运行了相应的辅助处理系统，如财务软件、MIS系统、电费管理系统等。

The modified particle swarm optimization is utilized to solve the proposed reactive power optimization model; and combining with non–stationary multi-stage assignment penalty function, the reactive power optimization problem is transferred into a problem to solve extreme-value without constraints, thus the calculation accuracy and global convergence ability of MPSO are effectively improved, and power grid company can achieve maximal economic benefit by means of the proposed algorithm.

应用改进粒子群优化算法求解该无功优化模型，并结合动态调整罚函数法将无功优化问题转化成无约束求极值问题，从而有效地提高了改进粒子群优化算法的全局收敛能力和计算精度，使电网公司取得了最大经济效益。

High-voltage power distribution and the step-down transformer should regulate the electricity sector for the construction of the installation; Chai oil-fired units. UPS and low-voltage power distribution panels to be installed in accordance with the norms of telecommunications power.

高压配电所和降压变压器应按照电力部门的规范进行建设安装；柴油发电机组、UPS和低压配电屏的安装应遵照电信电源规范进行。

AC Power Supply System Communication Power Supply System exchanges generally are high-voltage power distribution, step-down transformer, Chai oil-fired units, UPS and low-voltage distribution screen composition.

通信电源的交流供电系统一般由高压配电所、降压变压器、柴油发电机组、UPS和低压配电屏组成。

In this condition, the parallel transformer can exhibit nearly zero impedance to harmonic current and very high primary self-impedance to fundamental current and thus lead harmonic current in power systems to flow into the transformer branch. With a step-down transformer, the power semiconductor switches of the active power filter are always worked in relatively low voltage, which ensure the security and reliability of the active filtering device.

实时检测并联变压器一次侧的谐波电流，根据谐波补偿条件，得到谐波补偿电流的指令信号，通过电力电子变流器跟踪产生谐波补偿电流注入到二次侧补偿绕组中，使得并联变压器对谐波电流呈现近似为零的低阻抗，对基波电流呈现很大的一次侧自阻抗，从而输导系统中的谐波电流流入并联变压器支路。

With the fast development of power system and the stepwise realization of power market, the problem of large-scale power grids stability becomes more complicated.

随着电力系统的飞速发展和电力市场的逐步实现，大电网的稳定问题变得更加复杂。

Study testifies that the gender pattern of Chinese households today on the whole displays an inequality trend with strong males and weak females, but there are large gender differences in different dimensions and power spaces, while the husband-and-wife power has become a dominant family control power.

研究证实，今天中国家庭权力的性别格局就总体而言，仍呈男强女弱的不平等态势，但在不同维度和权力空间存在着较大的性别差异，而夫妻权力已成为家庭主导性的控制权力。

The design and construction of sub-station of the power bureau is an integral part of this system engineering project; it consists of three components, data query, exception management and system management, mainly for the benefits of power dispatching and maintenance personnel of the Liaoning Power Grid.

电业局子站的设计与实现是该系统工程项目中的重要组成部分，主要面向辽宁省电网电力调度的管理与维护人员，包括数据查询、异常管理、系统管理三个组成部分。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐