Results 31 to 40 of about 2,074 (132)
A Wireless Multi-Objective Power Sharing Method for Energy Storage System in DC Micro-Grid Considering Oscillatory-Type Power [PDF]
As the construction of new power systems, DC microgrids will become an important part of the distribution network. As AC load connecting to DC microgrids, the oscillating power will enter the DC system, which affects the power distribution of energy ...
LU Gang +4 more
core +1 more source
Gaoya dianqi, 2018 随着直流微电网系统的广泛应用,其控制技术得到不断关注。直流微电网系统由光伏阵列、电动汽车充换站、大电网及其接口变换器构成。针对其结构特点,采用一种能量协调控制策略以维持直流母线的电压稳定。该控制策略根据直流微电网中母线电压信息（DBS）进行运行模式划分,不同运行模式下,直流微电网各单元的控制策略可进行无缝切换,实现系统协调自治。采用下垂控制实现对多个光伏阵列或者电动汽车蓄电池模块的功率均分。仿真结果表明,直流母线电压保持稳定的同时,直流微电网系统能够在并离网不同模式间进行平滑切换 ...
张国荣, 王啸飞, 王盛
doaj
Study on Double Phase-Locked Loop on the Synthetic Inertia Control of Offshore Wind Farm Frequency Regulation [PDF]
To build the new power system with the main body of new energy, the offshore wind farm (OWF) is an important part and has been rapidly developed in coastal cities.
CAI Chuanwei +5 more
core +1 more source
Research on Large-Signal Stability Assessment Methods of DC Microgrids Based on Artificial Intelligence [PDF]
ObjectivesDC microgrids are prone to the issue of large-signal stability due to the low inertia and constant power load characteristics. Traditional model-based methods involve complex calculations and are difficult to solve.
HONG Tao +4 more
core +1 more source
Gaoya dianqi, 2019 针对并联多模块电流型双向直流—直流变换器,为了实现功率组合的灵活性及模块化设计,提出了一种改进模式的分布式控制策略。该策略通过采样高压侧电压和低压侧电流,实现下垂控制,同时采用电压补偿技术,改善了高压侧电压调整率。搭建了二台功率各为1.5 kW的样机进行了实验验证。实验结果表明:该方法无论在静态还是动态下,可以实现模块之间良好的功率均分;同时改善了电压调整率并能实现热插拔功能。
宋波, 杨峰, 易航
doaj
Research on Tidal Optimization of Voltage Overrun Problem in Photovoltaic Distribution Network With Electrical Energy Router [PDF]
ObjectivesWith the access of high-penetration distributed photovoltaic to the distribution network, the problems of power back-feeding and voltage overrun become more and more serious.
FENG Zining +3 more
core +1 more source
Review of Energy Management Systems for Islanded Microgrids [PDF]
ObjectivesAgainst the backdrop of energy resource scarcity and increasing environmental demands, distributed energy supply technologies, particularly renewable energy technologies, have attracted significant attention due to their high energy efficiency,
BIE Yu +4 more
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2021 结合半潜式和单立柱式海上风机浮式基础的特点,提出了一种用于海上风机的新型钢格构式基础。首先,根据美国可再生能源实验室(National Renewable Energy Laboratory,NREL)提供的5 MW海上风机样机对提出的新型浮式基础进行了结构设计。然后,采用水动力-空气动力-控制系统-系泊系统耦合方法对风-浪联合作用下的新型海上浮式风机的动力响应进行了分析。结果表明:钢格构式浮式基础的纵荡运动主要受风速变化影响,纵摇运动受风速-波浪变化的显著影响,而垂荡运动主要受波浪变化控制 ...
张浩, 王宇航, 闫渤文, 周绪红
doaj
Dynamic Power Decoupling Control of Virtual Synchronous Generator Based on Improved Virtual Impedance [PDF]
ObjectivesWhen a virtual synchronous generator (VSG) is connected to a medium and low voltage distribution network, the line impedance exhibits resistive and inductive characteristics, resulting in strong coupling in the VSG output power.
REN Mingwei +4 more
core +1 more source
Jixie chuandong, 2008 通过对"模型黄河"自动制模机横梁受力分析,并计算在各主要作用力作用下及横梁长度和载荷位置变化的情况下横梁的挠度变形总值,来判断横梁挠度变形是否超出制模机成型精度要求范围。在分析计算基础上,采用了根据横梁跨度的变化分段定值补偿挠度变形的措施,使伺服电机带动垂直丝杠按用修正后的y′值产生位移,以修正横梁挠度变形对成型精度的影响,简化了控制计算,依此来保证制模机的成型精度。
杨勇, 刘百宣
doaj