摘要
舰船、电厂和钢铁等生产中的重要负荷感应电机失电后要求快速地切换至备用电源,但这类动态负荷在不利条件下所带来的瞬态冲击会产生严重的后果。为解决这一问题,提出一种基于固态切换开关(SSTS)的感应电机类负荷电源快速切换控制新策略,其在各种备用电源与主电源间相位差下,既能够快速将关键负荷从主电源切换至备用电源上,又能够有效抑制电源切换中的瞬态冲击;然后,深入分析了备用电源投入控制过程中感应电机的复杂瞬态,重点讨论了影响瞬态冲击抑制的主要因素;此外,还研究计算了已知备用电源与主电源间具有相位差时控制参数与电流峰值之间的关系,并根据电流抑制需求确定控制参数;最后,通过定子电流计算结果和实测波形,验证了所提电源快速切换控制策略及参数计算的正确性和有效性。
As an important load of naval vessels, electric plants and steel plants, induction motorshould be switched rapidly from main source to alternative source after its power outages. However, thetransient inrush produced by such dynamic load under the adverse conditions would have seriousconsequences. Accordingly, a novel rapid power switching control strategy of induction motor load wasproposed based on solid state transfer switch (SSTS) in this paper. The proposed strategy could not onlyrapidly transfer the critical load from main source to alternative source, but also effectively suppressthe transient inrush under the condition of the various phase-angle differences between the two sources.Then, the complex transient of induction motor during the switching control process of the alternativesource was analyzed. And the main factors affecting the suppression of the transient inrush werediscussed. Besides, the relationship between control parameters and current peak values was explainedwhen the phase-angle difference between the two sources was known. The control parameters could beobtained by the requirement of the current-limit suppression. Finally, the calculation and test results ofthe stator currents verified that the proposed rapid power switching strategy and the parameters calculation were correct and effective.
作者
崔学深
张自力
王泽忠
李和明
杨娅萍
Cui Xueshen;Zhang Zili;Wang Zezhong;Li Heming;Yang Yaping(School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 China;State Grid Handan electric Power Supply Company Handan 056002 China;State Grid Heibei Cheng’an Electric Power Company Cheng’an 056700 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第18期21-28,共8页
Transactions of China Electrotechnical Society
基金
中央高校基本科研业务费专项资金(13XS06)
国家自然科学基金(51077048)资助项目
关键词
电源快速切换新策略
固态切换开关
控制参数
限流
感应电机
Novel rapid power switching strategy
solid state transfer switch
control parameters
current limit
induction motor
