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在大功率DC/DC开关电源中,为了获得更大的功率，特别是为了得到大电流时，经常采用N个单元并联的方法。多个单元并联具有高可靠性，并能实现电路模块标准化等优点。然而在并联中遇到的主要问题就是电流不均，特别在加重负载时，会引起较为严重的后果。普通的均流方法是采取独立的PWM控制器的各个模块，通过电流采样反馈到PWM控制器的引脚FB或者引脚COMP，即反馈运放的输入或者输出脚来调节输出电压，从而达到均流的目的。显然，电流采样是一个关键问题：用电阻采样，损耗比较大，电流放大后畸变比较大；用电流传感器成
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基站电源的日常维护与管理
蓄电池是基站电源系统的重要组成部分，其运行的稳定与否直接关系着通信网络的畅通和安全，因此建立完善的电源维护体系刻不容缓。
目前，基站电源配套的蓄电池大多是先进的阀控式密封铅酸蓄电池，这种电池的每节单体电压一般有２Ｖ、６Ｖ和１２Ｖ三种，在使用时将多节单体串连，组成４８Ｖ的蓄电池组。在对电源系统可靠性要求较高的场合，一般采用两组蓄电池并联运行的方式
-The base station power supply daily maintenance and ma
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A distribution system is an interface between the bulk power system and the consumers.
Among these systems, radial distribution systems are popular because of low cost and
simple design. In distribution systems, the voltages at buses reduces when
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Article_herra Distorted voltage and current waveforms is one of
the problems associated to electric power quality. Continuous
use of non-linear loads provokes the existence of voltage
waveforms with a high distortion. Thus, it is necessary to k
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A hybrid fuzzy-PI controller for voltage source
converter based HVDC (VSC-HVDC) transmission system is
proposed in this paper. At first, the elementary model of VSCHVDC
is described. Then the fuzzy self-tuning control strategy is
proposed, in
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风电场建模的案例分析。资料中详细分析了风电场建模的方法，并着重考虑了短路电流、LVRT、稳定性分析等内容。- Using an actual wind farm configuration, this paper
compares the effects of modeling detail on power flow
calculations such as those used to determine reactive power
requirements, voltag
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电力系统故障分析c语言编程计算故障时系统潮流，故障电压和频率-Power system fault analysis c language programming calculation of the fault system load flow, fault voltage and frequency
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Standalone Photovoltaic (PV) system requires a proper battery
charge controller. In this paper an efficient battery charge
controller using Buck-Boost regulator with Maximum Power
Point Tracking (MPPT) is presented. The voltage command is
det
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The training techniques, allows a wide range of use of the asynchronous machine with good
performance, tell her great robustness, reliability and electromagnetic low cost. The vector control
strategy takes into account the dynamic structure of
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The existence of the modules capacitors necessitates the control of their voltage level. A
dedicated controller is described that has two main parts the averaging controller that takes
care of the average capacitor voltage level per leg and the b
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The principal information obtained the load-flow study is the phase angle of the voltage at each bus, and the real and reactive power flowing and relability in each line.- The principal information obtained the load-flow study is the phase angle o
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针对直流电网中的最优潮流问题，提出了一种基于模糊控制理论的自适应粒子群算法，以实现电网兼顾有功网损和电压质量的优化运行。(To solve optimal power flow problem in DC grid, an adaptive particle swarm optimization (PSO) algorithm based on fuzzy control theory is proposed in this paper, and optimal operation consi
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