突加负载对同步发电机整流系统直流侧电压的影响
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摘要
为了研究发电机整流系统输出直流母线电压随突加负载的变化机理,基于交流发电机突加静态平衡负载的分析方法,给出了发电机整流系统直流侧突加负载时的瞬时电压表达式。首先,给出了发电机整流系统等效电路模型;然后,将直流侧负载等效到整流桥的交流侧,并利用整流桥本身的特性,推导了突加负载时直流侧瞬时电压表达式;最后,通过交流发电机突加静态平衡负载的理论计算结果检验了相应PSCAD仿真模型的可行性,并在此基础上,建立了发电机整流系统直流侧突加负载的PSCAD仿真模型,仿真结果验证了所提计算方法的正确性。
A study of instantaneous voltage changes in the generator rectifier system during the sudden application of DC load is based on the analysis of a suddenly-applied balanced static load in the alternator. Firstly,an equivalent circuit model of the generator rectifier system is established. Then,the DC-side load is made to be equivalent to the AC-side load of the bridge rectifier,and the behavior of the rectifier itself is used to derive an expression for DC-side instantaneous voltage at the time of the sudden application of load. Finally,the results of theoretical calculation and PSCAD simulation are given respectively according to a suddenly-applied balanced static load in the alternator and suddenly-applied DC load in the generator rectifier system. The theoretical calculation verifies the feasibility of the PSCAD simulation model and proves to be accurate by the results of PSCAD simulation.
A study of instantaneous voltage changes in the generator rectifier system during the sudden application of DC load is based on the analysis of a suddenly-applied balanced static load in the alternator. Firstly,an equivalent circuit model of the generator rectifier system is established. Then,the DC-side load is made to be equivalent to the AC-side load of the bridge rectifier,and the behavior of the rectifier itself is used to derive an expression for DC-side instantaneous voltage at the time of the sudden application of load. Finally,the results of theoretical calculation and PSCAD simulation are given respectively according to a suddenly-applied balanced static load in the alternator and suddenly-applied DC load in the generator rectifier system. The theoretical calculation verifies the feasibility of the PSCAD simulation model and proves to be accurate by the results of PSCAD simulation.
引文
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[2]高景德.交流电机过渡历程及运行方式的分析[M].北京:科学出版社,1964.
[3]甄洪斌,张晓锋,沈兵,等.脉冲负荷对舰船综合电力系统的冲击作用研究[J].中国电机工程学报,2006,26(12):85-88.ZHEN Hong-bin,ZHANG Xiao-feng,SHEN Bing,et al. Research on impact of pulsed power loads on naval integrated power system[J]. Proceedings of the CSEE,2006,26(12):85-88.(in Chinese)
[4]杨国豪.突加负载对船舶电站励磁装置参数的要求[J].中国修船,2000(5):21-26.YANG Guo-hao. Key factors of marine power station exciting system depends on emergency load[J].China Ship Repair,2000(5):21-26.(in Chinese)
[5]王同功,冯涛.空载起动运行三相感应电动机突加负载及其瞬时断电时的动态仿真[J].防爆电机,2013,48(2):26-28.WANG Tong-gong,FENG Tao. Simulation of no-load starting three-phase induction motor under pop-inload and instantaneous interruption of power supply[J].Explosion-Proof Electric Machine,2013,48(2):26-28.(in Chinese)
[6]管旭.突加负载时感应电动机动态过程的仿真[J].船电技术,2013,33(4):19-21.GUAN Xu. Simulation on pulsing loads of induction motor dynamic process[J]. Marine Electric,2013,33(4):19-21.(in Chinese)
[7]冯涛,王同功.三相感应电动机突加阶跃负载及瞬间断电重新投入电网时的动态仿真[J].电机与控制应用,2013,40(2):10-13.FENG Tao,WANG Tong-gong. Dynamic simulation of three-phase induction motor suddenly applied step load and rejoined power grid after momentary power failure[J]. Electric Machines&Control Application,2013,40(2):10-13.(in Chinese)
[8]王金全,胡亚超,李建科,等.脉冲功率负载对柴油发电机组-整流系统直流侧电压影响的试验研究[J].移动电源与车辆,2015(1):33-37.WANG Jin-quan,HU Ya-chao,LI Jian-ke,et al.Experiment research on the influence of a pulsed power load to the DC voltage of a diesel generator setrectifier system[J]. Movable Power Station&Vehicle,2015(1):33-37.(in Chinese)
[9]张晓锋.同步发电机整流系统的运行稳定性研究[D].北京:清华大学,1995.
[10]魏克银,刘德志,欧阳斌,等.带四线制整流桥负载同步发电机的等效电路模型与小信号模型[J].电工技术学报,2010,25(5):48-53.WEI Ke-yin,LIU De-zhi,OUYANG Bin,et al. Equivalent circuit model and small-signal model of synchronous generator with 4-wire rectifier load[J].Transactions of China Electrotechnical Society,2010,25(5):48-53.(in Chinese)
[11]陈新刚,冀路明,孙俊忠.考虑直流侧线路电阻时十二相发电机整流系统突然短路研究[J].中小型电机,2003,30(6):30-33.CHEN Xin-gang,JI Lu-ming,SUN Jun-zhong. Study on sudden short-circuit of 12-phase generator-rectifier system taken DC-side line resister into account[J].S&M Electric Machines,2003,30(6):30-33.(in Chinese)
[12]陈坚.电力电子学——电力电子变换和控制技术[M].北京:高等教育出版社,2002.