并联系统

高频UPS并联系统研究

Research on High-frequency UPS Parallel System

在逐步寻找此最可能失效点的过程中，建立自适应的重要抽样法来求解并联系统的失效概率，推导该方法失效概率估计值、方差和变异系数的计算公式。

The adaptive importance sampling method based on the most probable failure point is presented to estimate the failure probability of the parallel system . The formulae of the failure probability , the variance and the coefficient of variation are derived for the presented adaptive importance sampling method .

用MonteCarlo法评估高压交直流并联系统可靠性

Reliability Evaluation of HVAC / DC Parallel Systems by Monte Carlo Method

本文对具有PH型修理的三个不同部件串-并联系统进行了可靠性分析。

Reliability analysis of three dissimilar units series-parallel system with phase type repair is presented in this paper .

CAN总线在高频UPS冗余并联系统中的应用

Application of CAN Busin the High Frequency Redundant Parallel UPS System

BOOSTPFC变换器并联系统均流控制技术

Current Sharing Control for Boost PFC Converters in Parallel Operation

考虑由两不同部件组成的并联系统，假定部件的寿命服从指数分布，部件失效后的修理时间服从PH分布，修复如新。

In this paper a parallel repairable system is considered as consisting of two dissimilar units and a single repairman .

一类并联系统可靠度的Bayes置信下限

On Bayes Confidence Inferior Limit of Collateral System Degree of Reliability

反步均流型Buck变换器并联系统的建模与设计

Modeling and Design of the Paralleled Buck Converter System with the Backstepping Current Sharing Technique

介绍了并联系统UPS的特性及其实现，现场外接旁路的设计与具体操作，以及日常维护中的问题。

The characters and reality of double parallel system UPS , external bypass design and operation , and the suggestions about the ordinary maintenance are introduced also .

本文利用可靠性理论，对串联系统、并联系统、n中取K表决系统及备用系统进行了可靠性分析，简要地推导了部分公式，论证了冗余系统所具有的高可靠性。

The paper analyzes the reliability of series system , parallel system , getting K from n system and reserve system , briefly deduces a part of formulas and proves the high reliability of the redundancy system .

采用VISUALBASIC6.0开发了长管道多泵并联系统水锤计算的可视化软件。

The software for calculation of water hammer in parallel pumps system with long pipeline is developed by Visual Basic 6.0.In the mathematic model of the software , the popular characteristics method for numerical calculation of water hammer is adopted ;

这种方法适用于具有任意n个模块的逆变器并联系统，能够更有效的抑制环流（相对普通电感）并且不影响并联系统的稳态电压精度。

This method has such advantages as suitable for any parallel inverter system with n modules , better performance on restraining circulating current ( compared to uncoupled inductors ) and no influence on the steady voltage accuracy of parallel system .

独立同分布R-S（t）串并联系统的结构可靠度

The Reliable Probability for the Independent Identical Distribution R-S ( t ) Series and Parallel System

为了提高机载开关电源中半导体器件并联系统可靠性评估的准确性，运用经验Bayes法和经典的统计方法，研究了该系统的可靠性评估问题。

In order to improve the accuracy of the reliability evaluation for semiconductor parallel system , evaluated are the reliability for this system by using empirical Bayes and classical statistical methods .

并以基础为质量-弹簧-阻尼器的并联系统为例，利用MATLAB的仿真功能，对系统的响应比曲线进行模拟仿真，来分析系统参数对隔振效果的影响；

A parallel connection of mass-spring-damper was taken as an example . By means of the simulation function of Matlab , the responsibility curve of this system was simulated and the influence of system parameters on vibration isolation effect was analyzed .

基于复转矩系数法与特征根法，对交直流（AC/DC）并联系统的次同步振荡（SSO）阻尼特性进行了分析。

Based on complex torque coefficient method and eigenvalue analysis , the subsynchronous oscillation ( SSO ) damping characteristics of an AC / DC parallel system were studied .

本文在研究UPS冗余并联系统带阻性负载的基础上，首次深入分析了UPS冗余并联系统带感性负载和整流性负载的情况，利用MATLAB进行仿真，同时给出不同负载下系统的仿真模型和波形。

The thesis based on the redundant parallel operation of UPS with resistor analyses the operations of system with inductor and rectifier bridge load at first . The thesis gives the MATLAB simulation models and waveforms of the different loads .

为了得到控制简单、输出性能优良而且工程实用性高的UPS系统，本文研究了数字化的UPS并联系统，通过理论分析、设计、实验，得到了一些有用结论和实际经验。

In order to improve the performance and practicability of the UPS , this paper focuses on the digital parallel on-line UPS by the means of analysis , design and experiment , receiving some useful conclusions and experience .

实验结果表明该高频UPS并联系统工作稳定、具有良好的动静态性能，UPS的网络监控系统运行可靠、界面友好，可以满足UPS并联系统得网络监控要求。

The experimental results indicate UPS system operates stably , has good dynamic 、 steady-state performance , and UPS network supervision system works reliably , has friendly interface , meets the need of Parallel UPS system network supervision .

开关电源并联系统常用的自动均流控制方法在自动电压调节器AVR（AutomaticVoltageRegulator）开环模式下会大幅改变励磁电流静态值，故只能安全用于AVR闭环模式下。

In AVR ( Automatic Voltage Regulator ) open-loop mode , the common automatic current sharing control of parallel switching power supply system may change the static excitation current greatly . It can only be used safely in AVR close-loop mode .

最后对基于网络控制及功率下垂控制的逆变器并联系统进行实验研究，验证了基于网络控制及PQ下垂控制的逆变器并联系统的可行性。

At last , the experiment result of the parallel inverter system with networked control and droop method is given , and it verifies the ascendance of the networked control .

论文对PWMDC／DC电源的电路结构和工作模式、并联系统的结构、是否采用直流输入母线、以及系统的控制方案等问题进行了分析和讨论。

The problems such as the circuit and the working mode of the PWM DC / DC modules , the configuration of the parallel connection , the usage of the input DC bus , and the system control strategy were analyzed and discussed as well .

由已知寿命分布和测试数据的五个不同类型部件，组成一串并联系统，本文应用MonteCarlo方法，Bootstrap方法，和DoubleMonteCarlo方法给出该系统的可靠度置信下限。

A series-parallel system is consisted of five parts , of which the life distributions and test data are known . Some numerical results of the reliability lower confidence limits of the system are obtained by Monte Carlo , Bootstrap , and Double Monte Carlo methods .

针对电力系统实际负荷以及直流系统本身的非线性特性，在微分代数模型的基础上，将M导数、M括号以及MIMO微分代数系统反馈线性化技术运用到交直流并联系统非线性控制器设计中。

The M derivative 、 M bracket and MIMO feedback linearization based on differential algebraic models are introduced to the design of nonlinear controller for parallel AC / DC power system in view of the nonlinearity of power loads and HVDC in real power systems .

在单机交直流并联系统算例中对VSC附加无功控制器参数进行了配置，动态仿真结果表明该附加无功控制器相比于定无功功率控制能够有效的抑制交流电压波动。

In AC / DC parallel system with single machine case , the parameters of VSC additional reactive power controller have been selected , and dynamic simulation result has verified that VSC with the additional reactive power controller can suppress AC voltage fluctuation effectively .

为了改善连线阻抗不等时并联系统均流性的问题，本文从连线阻抗电压降补偿的角度入手，给出了改进的PQ下垂法，并对这种新的控制策略进行了仿真和实验验证。

In order to improve the phenomenon that parallel system has poor current sharing under different line impedance , the paper improves PQ droop control from the aspect of line impedance voltage compensation , and the new control strategy are validated by simulations and experiments .

以两台60KW单相全桥电压控制性逆变器为对象，建立了单相逆变器及并联系统的数学模型，对大功率单相逆变器的并联控制与保护技术进行了分析研究。

Based on two single-phase voltage-controlled inverters , the paper established the mathematical model of inverter and its parallel control system , then studies and analyzes the parallel system and protection methods .

一种具有两类失效模式的并联系统

A parallel system with items having two kinds of failure mode

并联系统预防性维修费用的优化方法

Optimal Method to Minimize the Preventive Maintenance Cost of Parallel Systems