Results 21 to 30 of about 377 (76)

混合串补抑制双馈风电场次同步振荡研究

Gaoya dianqi, 2019
随着串联电容补偿输电在风电并网工程中的推广应用,国内外部分双馈风电场（doubly fed induction generator,DFIG）面临着严峻的次同步振荡（subsynchronous oscillation,SSO）问题。为抑制DFIG风电场所面临的SSO问题,文中利用由静态同步串联补偿器（static synchronous series compensatory,SSSC）和固定电容器组成的混合串联补偿装置来实现风电场的并网,并提出了一种混合串补装置换流器附加控制抑制风电场SSO的方法 ...
朱鑫要, 周前, 刘建坤, 金梦
doaj  

十一电平链式STATCOM直流电容电压平衡控制研究

Gaoya dianqi, 2010
直流侧电容电压的不平衡及其控制是链式STATCOM要解决的关键问题。笔者给出了链式STATCOM直流电容稳态数学模型,分析了逆变桥参数对电容电压不平衡的影响,指出开关脉冲延时不同、混合型损耗差异以及并联型损耗差异是造成电容电压不平衡的主要原因。结合十一电平STATCOM,提出采用基频开关法投和基频脉冲循环换位法可以有效的保持链式STATCOM直流电容电压的平衡稳定,STATCOM的PSCAD模型及其仿真验证了该方法的可行性和有效性。
任明炜, 孙玉坤, 饶翔
doaj  

考虑风电场接入的电力系统暂态稳定约束网源协同规划方法

Gaoya dianqi
针对风电并网系统的暂态稳定性问题，文中研究了考虑风电场接入的电力系统暂态稳定约束网源协同规划方法，从规划和运行结合的视角增强电力系统暂态稳定性。论文首先以系统网架（网）优化加强、无功补偿电源（源）位置和容量优化、同步机有功功率（源）调整为手段，建立了暂态功角稳定和暂态电压稳定的能量约束条件，提出了考虑双馈风机（DFIG）、静止无功补偿器（SVC）等元件动态特性以及暂态功角和暂态电压稳定约束的网源协同规划半不定优化模型；其次通过罚函数法将所提半不定优化模型转化为无约束优化问题 ...
陆明璇, 梁毅, 张晓天, 芦思晨, 夏世威, 李海洋   +5 more
doaj  

三电平STATCOM新型直接功率控制策略研究 Research on Novel Direct Power Control Strategy of Three-Level STATCOM

, 2015
张一彦, 高睿, 肖一鸣
semanticscholar   +1 more source

[Rehabilitation guidelines and specifications for traumatic spinal cord injury (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Professional Committee Of Spine And Spinal Cord Injury Rehabilitation China Association Of Rehabilitation Of Disabled Persons, Professional Committee Of Spine Chinese Association Of Rehabilitation Medicine, The Second Medical-Rehabilitation Integration Working Committee Chinese Association Of Rehabilitation Medicine, Spine And Spinal Cord Injury Repair Study Group The Third Professional Committee Of Neurorestoratology Chinese Medical Doctor Association.   +3 more
europepmc   +1 more source

[Medical treatment standards for emergency burn wounded (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
National Health Commission Of The People's Republic Of China.
europepmc   +1 more source

[Chinese guidelines for clinical diagnosis, treatment, and management of cirrhosis (2025)]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Chinese Society of Hepatology, Chinese Medical Association.   +1 more
europepmc   +1 more source

[Application of percutaneous endoscopic gastrostomy in children with methylmalonic acidemia or propionic acidemia complicated by feeding difficulties: a case series of 7 patients]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Li WY, Zeng YM, Zhang JY, Lu XY, Wang WJ, Huang M, Qiu XY, Huang M, Wang YY, Chen YY, Dong GQ.   +10 more
europepmc   +1 more source

[Guidelines for the diagnosis and treatment of acute-on-chronic liver failure (2025 version)]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Severe Liver Disease and Artificial Liver Group, Chinese Society of Hepatology, Chinese Medical Association, Nutrition and Regeneration in End-Stage Liver Disease Group, Chinese Society of Hepatology, Chinese Medical Association.   +5 more
europepmc   +1 more source

[Long-term outcomes of the endoscopic transcanal transpromontorial approach for vestibular schwannoma]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Wang Q, Wu H, Mei L, Cai X.
europepmc   +1 more source