多路并联高效节能的高压大功率斩波调速系统
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摘要
超大功率电机斩波串级调速系统节能空间远大于小功率电机,但目前鲜有研究,主要是因为单个IGBT构成的斩波器不能解决超大功率电机转子电压高且电流过大问题。针对性提出多路斩波并联电路拓扑结构,基于状态空间平均法对主回路进行分析,建立系统数学模型。采用叠层母排结构,利用每个斩波器的电抗器自动均流,实现5 400 k W多路并联调速系统,突破了单路斩波器小电流瓶颈。实验数据表明各斩波支路电流均衡,总和为母线电流值,设备运行稳定,节能效果明显,经济和社会效益突出。
Energy saving space in chopper cascade speed control system of super high power motor is much larger than that of small power motor,but there are few studies so far,mainly because single IGBT chopper cannot solve the problem of high voltage of the motor rotor and heavy current of the rotor. The topology structure of multi chopper parallel circuit is put forward in this paper. Based on the state-space average method,the mathematical model of the system is established. The laminated bus bar structure is used to reduce stray inductance,and the chopper reactor automatically equalizes the current,hence a 5 400 k W chopper parallel cascade speed control system is achieved. It broke through the bottleneck of single channel chopper. The experimental data show that the current of the chopping circuit is balanced,and the sum of branch currents is equal to the value of the bus current. Stable operation of the equipment and obvious saving effect verify the correctness of the proposed method,and the economic and social benefits are outstanding.
Energy saving space in chopper cascade speed control system of super high power motor is much larger than that of small power motor,but there are few studies so far,mainly because single IGBT chopper cannot solve the problem of high voltage of the motor rotor and heavy current of the rotor. The topology structure of multi chopper parallel circuit is put forward in this paper. Based on the state-space average method,the mathematical model of the system is established. The laminated bus bar structure is used to reduce stray inductance,and the chopper reactor automatically equalizes the current,hence a 5 400 k W chopper parallel cascade speed control system is achieved. It broke through the bottleneck of single channel chopper. The experimental data show that the current of the chopping circuit is balanced,and the sum of branch currents is equal to the value of the bus current. Stable operation of the equipment and obvious saving effect verify the correctness of the proposed method,and the economic and social benefits are outstanding.
引文
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[14]张卓.4 MW大功率高压电流型绕线电机调速节能系统研究与应用[D].广州:广东工业大学,2015.
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[17]张庆红,林永君,王兴武,等.串级调速系统的远程监控系统设计与实现[J].电力科学与工程,2015,31(7):46-52.
[2]曹以龙,江友华,陈宏伟.串级调速技术的发展与现状[J].变频器世界,2009(3):26.
[3]杨亚杰,葛玻.转子变频调速的进展[J].电源技术,2011(7):880-883.
[4]屈维谦.交流调速的功率控制原理[J].华北电力大学学报,2002,29(3):39-43.
[5]屈维谦.串级调速的再讨论[J].电气传动自动化,2007,29(3):1-6.
[6]冯阳,王亚芳,王奔,等.变结构控制策略在串级调速系统中的应用[J].电力科学与工程,2014,30(7):55-59.
[7]张军伟,王兵树,万军,等.高频斩波串级调速系统功率因数的分析与计算[J].大电机技术,2011(1):13-18.
[8]王春杰.大功率异步机转子变频调速系统及其控制策略研究[D].天津:天津大学,2005.
[9]张军伟.异步电动机高频斩波串级调速系统模型及特性的研究[D].保定:华北电力大学,2011.
[10]张军伟,王兵树,万军,等.斩波串级调速系统机械特性的分析[J].电机与控制应用,2010,37(1):25-30.
[11]王兵树,张军伟,林永君,等.斩波串级调速系统主回路分析与参数选择[J].华东电力,2010,38(9):1350-1354.
[12]姜栋栋.SEC串级调速系统IGBT有源逆变控制的设计与实现[D].保定:华北电力大学,2012.
[13]高娜,吴小泽,王钦若,等.2.5MW转子侧变频调速节能系统的应用研究[J].变频器世界,2013(10):77-81.
[14]张卓.4 MW大功率高压电流型绕线电机调速节能系统研究与应用[D].广州:广东工业大学,2015.
[15]毕天昊,王钦若,张卓,等.4MW斩波串级调速系统的应用研究[J].科技视界,2015(17):8-9.
[16]徐德鸿.电力电子系统建模及控制[M].北京:机械工业出版社,2006.
[17]张庆红,林永君,王兴武,等.串级调速系统的远程监控系统设计与实现[J].电力科学与工程,2015,31(7):46-52.