虚拟同步发电机 - Open Access .click

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Gaoya dianqi
在储能换流器（power conversion system，PCS）控制系统中采用了虚拟同步机（virtual synchronous generation，VSG）控制策略，使其拥有与同步发电机相近的旋转及励磁特性。提出一种新型自适应虚拟惯量VSG控制方法，引入频率变化率表征虚拟惯量，减少储能VSG频率调节时的调节偏差与调节时间；针对储能系统常见低频扰动，采用虚拟电力系统静态稳定器（power system stabilizer，PSS）调节环节，增加VSG控制系统阻尼比，维持频率稳定。MATLAB/
冯晓静 +4 more
doaj

基于神经网络的GFVSG多参数协同自适应优化控制策略

Gaoya dianqi
构网型虚拟同步发电机（GFVSG）可以为电网提供主动支撑，但存在有功频率响应慢和频率抗扰动能力差的问题。文中借助GFVSG参数灵活可调的优势，提出一种基于神经网络的GFVSG多参数协同自适应优化控制策略。首先，建立数学模型，解析转动惯量与阻尼系数对系统的动态影响机理，其次，结合同步发电机功角特性与频率振荡曲线，归纳出参数的动态整定准则与实时需求；最后，引入强非线性映射能力的RBF神经网络，构建参数自整定框架，设计复合误差函数，引入动态耦合系数，实现多参数协同自适应优化控制。仿真结果表明 ...
王旭, 贾彦, 郭强, 郭名洋
doaj

虚拟同步发电机频率偏差前馈阻尼控制策略的参数整定方法

Gaoya dianqi
虚拟同步发电机（virtual synchronous generator，VSG）也存在类似于传统同步发电机的功率振荡特性，频率偏差前馈阻尼方法实现简单，能够有效抑制有功功率指令值或电网频率跳变情况下VSG的有功功率振荡，同时不会影响VSG原有的惯量特性。然而，现有研究在建立频率偏差前馈阻尼方法的有功功率环闭环传递函数模型时未考虑功率低通滤波的影响，系统阶数由3阶变为2阶，若仍采用现有的参数整定方法可能导致前馈系数设计不正确。为此，文中在考虑低通滤波的基础上建立了VSG的传递函数模型 ...
杨桂兴 +6 more
doaj

[Application and research progress of mandibular distraction osteogenesis in craniofacial microsomia]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li L, Zhang Z.
europepmc +1 more source

[Extracellular matrix materials and tissue regeneration and repair]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao L, Xie H.
europepmc +1 more source

[Advances in application of digital orthopedic technology in total hip arthroplasty for developmental dysplasia of hip]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang B, Li H, Li M, Kong X, Chai W.
europepmc +1 more source

[<i>Fuzheng Xiaoyan</i> Granules ameliorate cancer-related fatigue during breast cancer chemotherapy by regulating the AKT1/BAD/BCL-2 pathway]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Sun X +6 more
europepmc +1 more source

[Molecular imprinting strategies and advances targeting biomembranes]. [PDF]

Se Pu
Yuan XT, Wang L, Chen LX, Hu LH.
europepmc +1 more source

[Clinical decision-making for immediate restoration of terminal dentition: determination and transfer of jaw relations]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Gu Y, Yang S, Yuan Q.
europepmc +1 more source

[Expert Consensus on the Clinical Practice of Child Life Services]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Nursing Group Of Chinese Pediatric Society Chinese Medical Association +1 more
europepmc +1 more source