查询词典 power transmission

Products sell well both inside and outside the Great Wall, the major north-south, widely used in electric power, metallurgical, petrochemical, mining, railway transportation, building materials, telecommunications, communications and other industries to meet the thermal power plants, hydropower stations and power transmission stations, smelters, coal mines, oil fields, oil refineries Factory, cement plant, all the cable railway bridge project needs.

产品畅销长城内外，大江南北，广泛运用于电力、冶金、石化、矿山、铁路交通、建材、邮电、通讯等行业，可满足火电厂、水电站、输变电站、冶炼厂、煤矿、油田、炼油厂、水泥厂、铁路桥梁工程全部电缆的需要。

For the ill conditioned load flow caused by the error produced in the transformation from electricity quantities to average power, direct current load flow and sensitivity vector are presented to find out the ill node, then by adjusting the load curve and generation curve in a certain principle, which is shown in detail with several flow charts, a new operation mode is reestablished to ensure the convergence of the calculation. Optimal multiplier method is proposed to work out the least square solution according to ill conditioned structural power network. The electricity quantities flow method enhances the reliability and accuracy of the calculation of the power transmission losses.

该方法可根据当前输电网中各个变电站24小时的电量记录，利用电量潮流计算对输电网总线损和各条线路损耗进行计算，使计算的精度满足降损措施分析和指标考核的要求；并且对于由负荷出力曲线转化成平均功率计算潮流时引入的误差，进而导致潮流计算不收敛的情况，采用直流潮流法，依据相角对有功功率的灵敏度向量判断出"网络异常点"，并且给出了解决此种情况的方法流程图；针对结构病态的电力系统潮流计算不收敛的情况，运用非线性约束优化方法中的最优乘子法求解潮流方程的最小二乘解，从而解决了电量潮流法计算理论线损时的收敛性问题，增强了该方法的适用性。

Therefore, new desires of power generation, power transmission and distribution and power utilization are put forward.

因此对发电、输配电和电能的使用提出新的要求。

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。

The company is the electric member unit of enterprises federation of China; Member unit of construction technology branch of special committee of power transmission and transformation of Chinese Electrical Engineering Society; National vltrahigh voltage give switchyard construction technical information unit and national power system , net explorer of network , to transmit power professional operation job unit , net explorer of network .

公司为中国电力企业联合会会员单位；中国电机工程学会输变电专委会施工技术分会会员单位；全国超高压送变电施工技术信息网网员单位及全国电力系统送电专业运行工作网网员单位。

Because of the serious power supply and the problems in security and stability of the grid, it is very important to have an delaminating and districting operation in Zhenjiang's power grid, thus to prevent the hidden trouble that the high fault current would bring to the secure operation of the power grid, and also the power transmission can be assured at the same time.

在目前供电形式严峻、电网安全稳定问题突出的局面下，合理的对镇江电网进行分层分区运行，减小短路电流过大对电网安全运行带来的隐患将起到非常重要的作用，同时也为镇江电力外送提供保障。

Sichuan Provincial Foreign Trade Metals and Minerals Import and Export limited liability company mainly engaged in technology transfer and production of complete sets of equipment and raw materials in bulk import and export business, operating the main products are: thermal power generation equipment, hydro-electric power equipment, power transmission equipment, environmental equipment, water treatment Equipment, general machinery, light industrial machinery, construction machinery, grain, oil, food machinery, transport machinery, plastics machinery, chemical machinery, packaging machinery, machine tools, machine tools, measuring tool cutting tools, hand tools, farm tools, rubber processing equipment, telecommunications equipment, system Sugar equipment, compressed air equipment, geological drilling equipment, ceramic equipment, railroad equipment, rolling stock, chemical equipment, industrial Li, teaching equipment, communications equipment, glass equipment, communication cables, power cables, all kinds of special light bulbs, all kinds of Electronic components, all kinds of hardware, all kinds of aluminum, profiles, steel, pig iron, iron alloy, nonferrous metals, ferrous metals, non-metallic mineral products and chemical raw materials, the company is now working with various world-renowned brand manufacturers and agents There is a close business contacts at the same time the company has also developed international financial institutions, loans and government bonds, and other related businesses bidding, so far, I Division in loans from the World Bank, Asian Bank loans in the tender have been repeatedly successful.

四川省外贸五金矿产进出口有限责任公司主要从事技术引进，成套设备和大宗生产原材料的进出口业务，经营的主要产品有：火力发电设备、水力发电设备、输变电设备、环保设备、水处理设备、通用机械、轻工机械、建筑施工机械、粮油食品机械、运输机械、塑料机械、化工机械、包装机械、机床、机床工具、量具刃具、手工工具、农具、橡胶加工设备、邮电设备、制糖设备、空气压缩设备、地质钻探设备、搪瓷设备、铁道设备、机车车辆、化工仪器、工业黧器、示教仪器、通讯仪器、玻璃仪器、通信电缆、电力电缆、各种特种灯泡、各种电子元件、各种小五金、各种铝材、型材、钢材、生铁、铁合金、有色金属、黑色金属、非金属矿产品和化工原料等，公司现与多个世界著名品牌的生产厂和代理商有着密切的业务往来；同时公司还开展国际金融机构贷款和国债项目等相关的招投标业务，迄今为止，我司在世界银行贷款、亚洲银行贷款等的招标中曾先后多次中标。

Considering the geographic dispersive distribution of large-scale offshore wind farms and the feature that doubly-fed wind power generators or direct-driven/ hybrid-driven wind power generators are mainly adopted in them, a power transmission topological structure of VSC-HVDC system corresponding to the connection offshore wind farms with power grid is proposed, and related control strategy is designed.

针对大规模近海风电场地理分布上高度分散以及主要采用双馈式或直驱/半直驱式风电机组的特点，提出了相应的电压源型变流器的高压直流(voltage source converter based HVDC，VSC-HVDC)并网传输拓扑结构，并设计了相应的控制策略。

This article is based on the optimal power flow calculation system optimization, the price in generating cost for target function, through constructing Lagrange equation using matrix calculation, to find the shadow price equation and the proportion of each node determine the price, the coefficient of power transmission and power nodes.

本文是基于最优潮流计算对系统电价最优化，以发电成本为目标函数，通过构建拉格朗日方程，运用矩阵计算对方程求解，寻找影子价格确定各节点电价的比例系数，由此求出节点电价和传输电价。

In this paper the basic principle of dynamic simulation with PSS/E is presented; the effectiveness and adaptability of flexible HVDC power transmission model are analyzed, and on the basis of actual power system the quasi steady-state VSC-HVDC dynamic model VSCDCT is simulated. Simulation results show that it is available to apply PSS/E in transient stability analysis of practical large-scale AD/DC power system.

介绍了PSS/E动态仿真的基本原理；分析了柔性直流输电模型VSCDCT的有效性和适用性，并基于实际系统对准稳态直流动态模型VSCDCT进行了仿真研究，仿真结果表明 PSS/E直流模型能够满足大规模交/直流系统仿真的要求。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。