intermediate-current plasma arc welding

With the help of Electromagnetic Transient Program(EMTP),three 1000kV tower models that is lumped inductance model,single.

杆塔的准确模拟对特高压变电站反击侵入波幅值影响很大,为使其模拟计算结果更准确,建立了集中电感、单波阻抗和多波阻抗3种1000kV杆塔模型;针对1000kV变电站不同的运行方式,计算分析了雷电反击侵入波。

Typical Case Analysis of Icing Load On-line Monitoring System of Central China Power Grid;

华中电网覆冰监测系统典型实例分析

2 power plant tCentral China power grid is researched.

“十二五”期间平顶山二电厂将建设4台1GW超超临界燃煤机组,为保证电厂电力的外送,促进电网与电源的协调发展,文章进行了平顶山二电厂向华中电网送电的输电规划研究,重点研究了华中东部四省市场空间、电厂向华中东部四省送电的必要性及输电方案,通过对各输电方案的综合技术经济比较提出了推荐方案。

To research the accuracy of the load model and its parameters being adopted in the dispatching department of central China power grid to guide the load modeling scientifically, the equivalent impedances of distribution networks of central China power grid are calculated by power system analysis software package (PSASP).

为探讨目前华中电网调度部门实际使用的负荷模型及其参数的准确性,指导科学建模工作,利用电力系统分析综合程序PSASP计算了华中电网各配电网的等值阻抗,仿真结果表明目前应用的等值负荷模型参数与实际情况有一定差距,配电网络结构、运行电压、等值阻抗处理方法等因素对负荷模型等值的准确性均有影响,利用仿真得到的负荷模型等值参数可减少电压稳定问题突出的电网所需要的稳定措施量。

Peak-Load Adjustment Influnce of Three Gorge Hydropower Plant to Central China Power Network;

三峡电站对华中电网调峰的影响分析

Based on the Central China power network in 2008,this paper specially analyzes the safety and stability of 500 kV circle network in the east of Hubei as viewed from the load flow and stability calculation.

以2008年华中电网为基础,从潮流稳定计算分析的角度对2008年建成的500kV鄂东环网的安全稳定方面的问题进行了专门分析,提出了鄂东环网建成后的相关稳定措施建议。

5kV IGBT modules, and the their medium voltage applications including in traction, industrial drives and pulse power have been introduced in this paper.

5kV IGBT芯片制造和封装技术的特点,以及在牵引、工业传动和大功率脉冲等方面的中电压应用。

Influence on position precition of centre adjustment voltage to control cylinder;

置中电压对比例方向阀控缸位置精度的影响

Analysis on Demand-supply Situation in Central China Grid & Countermeasures for It;

华中电网电力供需形势及对策

This paper combines actual transmit electricity item of central China grid to study mechanism of low frequency oscillations.

为理解和解决电力系统的低频振荡问题,结合川渝并入华中电网互联输电的实际工程,基于低频振荡故障的数学模型和机理的研究,计算分析了目前华中电网产生低频振荡的几率、地点和稳定特性。

Discussion on Reducing Abandoned Water & Increasing Electricity Output in Mid-China Power System;

华中电网减少水电弃水增发电量问题探讨

Discussion on Developing PSPS in Mid-China Power System;

华中电网抽水蓄能电站建设问题探讨

Discussion on Reformation and Capacity Enlargement of Hydropower Units in Mid-China Power System;

谈华中电网水电机组改造和扩机增容