Results 81 to 90 of about 17,121 (168)

Voltage Hierarchical Control Strategy of Active Distribution Network Based on Deep Reinforcement Learning [PDF]

open access: yes
ObjectivesThe randomness and volatility of distributed power generation poses significant challenges for the voltage control in active distribution network (AND).
DU Wanlin   +6 more
core   +1 more source

高压直流断路器的研制现状

open access: yesGaoya dianqi, 1989
一、直流输电系统概况 自1954年世界上出现第一条高压直流输电线路以来,高压直流输电系统愈来愈受到人们的重视。三十多年来,世界上已相继建成许多高压和超高压直流输电系统。直流输电只送有功功率,减少了无功线损和交流输电系统所必需的无功功率线路补偿设备。在输送相同功率的情况下,直流系统的线路造价和绝缘设备用量都比交流系统低。但是直流系统的换流设备造价昂贵。电力系统专家认为,综合直流系统的线路造价和换流设备造价等因素 ...
吉嘉琴, 张力超, 张节容
doaj  

60GHz RoF系统功率设计及分配

open access: yesGuangtongxin yanjiu, 2007
文章以Matlab为编程、分析工具,运用上、下行链路分离正序法对60 GHz射频光纤(RoF)系统进行功率设计、计算及分配,其中包括对RoF系统中光器件光功率的设计、无线传输部分电功率的估计以及对上行链路重要接收点的信噪比分析。通过系统的功率分配设计,对RoF系统的可实现性、合理性和稳定性做出必要的分析。最后,依据设计方案和功率计算结果,建立实际、可行的60 GHz RoF系统。
张奇, 林如俭, 修明磊
doaj  

Advanced control strategies applied to power converters [PDF]

open access: yes, 2019
Los convertidores de potencia basados en interruptores de potencia controlables son equipos indispensables en los sistemas de potencia modernos. Sirven como interfaces inteligentes entre la red pública, las fuentes de energía renovables (incluidos los ...
Luo, Wensheng
core  

轻型HVDC和SVC简介

open access: yesGaoya dianqi, 2002
轻型HVDC和SVC是近10a来发展起来的新技术它是采用IGBT组成的电压源换流器(VSC)取代传统的晶闸管、GTO组成的电流源换流器(CSC),以获取对有功功率和无功功率的高速双向控制,使整个换流设备简化,紧凑,且投资减少,在中低压领域优势尤为显著。
马振军
doaj  

Research on Reconfiguration Strategy of Distributed Distribution Network With Self-Healing Performance Under High-Proportion Renewable Energy Access [PDF]

open access: yes
ObjectivesAs the proportion of renewable energy in power grids increases year by year, the volatility and uncertainty of the grid are significantly heightened, posing challenges to the safe operation of distribution networks.
HUANG Yijun, WU Renbo
core   +1 more source

Design of Min-temperature Measurement System Based on AT89C51 and DS18B20 [PDF]

open access: yes, 2007
设计了以美国DALLAS半导体公司的单总线温度传感器DS18B20为核心,以ATMEL公司的AT89C51为控制器的最简温度测量系统。介绍了系统的结构、硬件和软件,并给出了AT89C51与DS18B20通讯的部分汇编语言代码。与传统装置比,具有结构简单、抗干扰能力强、测量精度高、适用范围广等特点。In this paper,Min-temperature Measurement System(MTMS) is designed.The Single Bus Temperature Sensor ...
张海
core  

Risk Prediction Method of Low Frequency Oscillation in Maintenance Power Network Based on Long Short Term Memory Neural Network [PDF]

open access: yes
With the expansion of power grid scale and the increase of power components, the maintenance methods of power system become more and more complex. It is difficult to evaluate the low-frequency oscillation risk of power grid under massive maintenance only
DU Xiaoyong   +8 more
core   +1 more source

低压智能分相补偿技术

open access: yesGaoya dianqi, 2002
介绍了一种新型的低压无功补偿技术———智能分相补偿装置。该装置采用过零触发的电子开关 ,可对三相无功功率进行分相自动投切 ,同时可以对电能在传输过程中的多路参数进行自动监测、记录、统计 ,并按要求进行各种分析。
葛军, 陈琦
doaj  

轴快流CO2激光器谐振式软开关电源

open access: yesGaoya dianqi, 2010
采用新型谐振式软开关技术,成功地研制出激励高功率轴快流CO2激光器的零电流谐振式软开关电源。该电源工作在25 kHz的开关频率下,主电路采用半桥式谐振变换方式,电源处于软开关工作方式,IGBT功率管为零电流开通和关断。该电源输出电流5~120 mA连续可调,功率管低损耗工作,无需镇流电阻,实现了6支CO2激光放电管的并联起辉和稳定工作。
李波, 王又青
doaj  

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