换流器

Application of an optimal control strategy to a new type of HVDC system based on voltage source converters.

一种优化控制策略在基于电压源换流器的HVDC系统中的应用。

It is difficult to obtain the dynamic models of converters, overlong overhead HVDC lines and passive filters in audio frequency.

然而，由于运行工况及气候的影响，难以求取换流器及长距离高压架空线路在音频带内的动态数学模型。

The DC reactive power is the only parameter to be specified in calculation, and the partial differential formulas in Jacobian matrix do not change when the DC control model changes.

计算时，只需规定换流器直流侧的无功功率，而且当直流系统控制方式发生变化后不需重新推导Jacobian矩阵中的偏导公式。

As the primary protection for high voltage direct current converters, there are two kinds of typical operational equations for valve short circuit protections.

作为高压直流输电系统中换流器的主保护，现有的阀短路保护主要有2类动作方程。

Above all by hand in dc network to the coupling between concerns and be changed stream implement changeover equation, derivation gives rectangular coordinates to fasten matrix of the Jacobi that makes dc system, Hessian, the means that offers section to seek solution in the light of the change that makes dc system control fashion next begs solution voltage to stabilize the usable transmission ability below tie condition.

首先由交直流网络间的耦合关系和换流器转换方程，推导出直角坐标系交直流系统的Jacobi、Hessian矩阵，然后针对交直流系统控制方式的改变提出分段求解的方法求解电压稳定约束条件下的可用传输能力。

Rectifier / converter equipment from Auckland company Santon Technology Co., Ltd. design and manufacture, the company battery chargers and speed drive manufacturers have years of experience.

整流器/换流器设备由奥克兰公司Santon技术有限公司设计和制造，该公司对电池充电器和变速驱动器的制造有多年经验。

This method allows to increase considerably the accuracy of digital simulation of converters and thus increase the step length of simulation.

使用该方法可以显著地提高换流器数字仿真的计算精度，从而可以加大仿真计算步长。

Control strategy for VSC-HVDC system under unsymmetry of three phase voltage .

三相电压不对称时带有电压源换流器的HVDC系统的控制策略。

High frequency emergency lighting apparatus for telecommunication power system is proposed in this paper. The proposed circuit configuration comprises an electronic ballast, a line voltage detector, and a charger/discharger. To compact the system structure and raise the efficiency, the class E inverter and bi-directional converter are employed, respectively.

本文中主要提出一种应用於电信电源供应系统之高频紧急照明装置，所提之架构包括采用E类换流器为主电路之电子安定器、市电侦测电路及单级双向充放电电路，其主要特徵是电路简单、维修容易且具高效能。

Other conclusion include: the trip of transient protection must be locked when the power circuit breaker of transimission line operated,because the trip is incorrect at this time;the features of transient current and its energy is different between the fault and thunder over- voltage in transimission line,and them can be identified;the ratio of high frequency component of current in serise capaciters compensation line , SVC and HVDC system is far little than fault transient current, so all of them do not affect the working of trasient current protection.

研究了在串联补偿电容的输电线路上发生故障时，串联补偿电容的MOV非线性保护电路对暂态保护的影响。串补电容MOV保护电路的非线性电流高频分量含量很小。静止补偿器、高压直流输电系统换流器的非线性特性产生的谐波分量含量极少。仿真计算表明，在与暂态保护判据中高频分量对应的频率范围内，其电流对应的功率谱估计值大大低于线路故障时故障电流的功率谱估计值，因此它们都不会对暂态电流保护的正常工作产生影响。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了