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自动励磁调节器整定计算的探讨 被引量:12
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作者 孙孜平 高春如 +1 位作者 沈俭 彭慧韬 《电力系统自动化》 EI CSCD 北大核心 2003年第3期68-71,共4页
介绍了因自动励磁调节器 (AVR)故障 ,过电压、过励磁保护设置不完善 ,以及整定欠合理而导致发电机、主变压器严重过电压和过励磁的实例 ;对微机型 AVR的过励磁或过电压、励磁过电流、低励磁限制和保护整定计算进行了探讨 ;提出了为完善... 介绍了因自动励磁调节器 (AVR)故障 ,过电压、过励磁保护设置不完善 ,以及整定欠合理而导致发电机、主变压器严重过电压和过励磁的实例 ;对微机型 AVR的过励磁或过电压、励磁过电流、低励磁限制和保护整定计算进行了探讨 ;提出了为完善以上保护功能 ,确保发电机、主变压器的安全运行而改进过励磁和过电压保护的措施。 展开更多
关键词 自动励磁调节器 整定计算 发电机 失步功能 励磁回路
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Reversible pre-excitation cardiomyopathy:a case report
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作者 Wang Jinxi Zhai Mei +1 位作者 Zhang Yuhui Zhang Jian 《中华心力衰竭和心肌病杂志(中英文)》 2024年第2期123-127,共5页
This paper reported a 25-year-old hospitalized woman complained of recurrent chest tightness and dyspnea for 3 months.The electrocardiogram showed pre-excitation and the echocardiogram showed left ventricular wall con... This paper reported a 25-year-old hospitalized woman complained of recurrent chest tightness and dyspnea for 3 months.The electrocardiogram showed pre-excitation and the echocardiogram showed left ventricular wall contraction reduced diffusely and moved asynchronously.In the systolic period,the regional septum basal segment moved to the right ventricle like an aneurysm.In cardiac magnetic resonance imaging examination,there was no significant myocardial fibrosis.The patient further had an endomyocardial biopsy and pathological examination showed nonspecific changes,only with mild interstitial edema.After an electrophysiological study,the patient was finally diagnosed with pre-excitation cardiomyopathy with a right anteroseptal para-hisian manifest accessory pathway.Radiofrequency catheter ablation was then performed to block the advanced pathway.6 months after ablation,the left ventricular systolic function and synchrony improved significantly,and the symptoms were alleviated. 展开更多
关键词 Pre-excitation cardiomyopathy Asynchronous electromechanical contraction coupling Reversible cardiac function
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