斩波串级调速系统逆变侧电子保护电路的研究与设计
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摘要
根据常规斩波串级调速系统的拓扑结构,分析了调速设备故障时接触器保护在动作保护过程中主回路的暂态过程。由于接触器动作时间较长,在其动作期间调速设备易受到高电压、大电流的冲击,导致电力电子器件损坏。针对接触器保护的弊端,设计了带电子保护电路的主回路拓扑结构。并分析了高压失电工况下常规的和带电子保护电路的斩波串级调速系统的暂态过程,同时进行详细的理论推导,得出高压失电工况下理论分析的依据。最后在模拟带载试验平台上分别对常规斩波串级调速系统和增加电子保护电路的调速系统在高压失电的工况下进行测试。测试结果表明理论计算与实际测量值基本一致,同时验证了电子保护电路有效解决了有源逆变结构下的高压失电或者逆变颠覆的问题。
According to the topology of conventional chopper cascade speed system, this paper analyzes the transient process of main loop of contactor protection when device failure. Because the contactor action requires a longer time, equipment is vulnerable to the impact of high voltage, high current during the contactor action, and cause damage to power electronic devices. For contactors and fast-cut protection drawbacks, the main circuit topology with electronic protection circuit is designed. Then transient process of conventional chopper cascade speed system and chopper cascade speed system with electronic protection circuit under high voltage power failure conditions are analyzed, and theoretics is detailedly deduced. The basis of theoretical analysis under high-voltage power failure condition is got. Finally, the conventional chopper cascade speed control system and with electronic protection circuits for high-voltage power failure conditions are tested on the simulated load test platforms. Experimental results show that the theoretical calculation is consistent with the actual measured values, and verify that electronic protection circuits effectively solve the problem of high-voltage power failure and inverter subversion under active inverter structure.
According to the topology of conventional chopper cascade speed system, this paper analyzes the transient process of main loop of contactor protection when device failure. Because the contactor action requires a longer time, equipment is vulnerable to the impact of high voltage, high current during the contactor action, and cause damage to power electronic devices. For contactors and fast-cut protection drawbacks, the main circuit topology with electronic protection circuit is designed. Then transient process of conventional chopper cascade speed system and chopper cascade speed system with electronic protection circuit under high voltage power failure conditions are analyzed, and theoretics is detailedly deduced. The basis of theoretical analysis under high-voltage power failure condition is got. Finally, the conventional chopper cascade speed control system and with electronic protection circuits for high-voltage power failure conditions are tested on the simulated load test platforms. Experimental results show that the theoretical calculation is consistent with the actual measured values, and verify that electronic protection circuits effectively solve the problem of high-voltage power failure and inverter subversion under active inverter structure.
引文
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[12]姚致清,张茜,刘喜梅.基于PSCAD/EMTDC的三相光伏并网发电系统仿真研究[J].电力系统保护与控制,2010,38(17):76-81.YAO Zhiqing,ZHANG Qian,LIU Ximei.Research on simulation of a three-phase grid-connected photovoltaic generation system based on PSCAD/EMTDC[J].Power System Protection and Control,2010,38(17):76-81.
[2]姚致清,赵倩,刘喜梅.基于准同步原理的逆变器并网技术研究[J].电力系统保护与控制,2011,39(24):123-126.YAO Zhiqing,ZHAO Qian,LIU Ximei.Research on grid-connected technology of inverter based on quasi synchronous principle[J].Power System Protection and Control,2011,39(24):123-126.
[3]姚致清,刘涛,张爱玲,等.直流融冰技术的研究及应用[J].电力系统保护与控制,2010,38(21):57-62.YAO Zhiqing,LIU Tao,ZHANG Ailing,et al.Research&application on DC de-icing technology[J].Power System Protection and Control,2010,38(21):57-62.
[4]张军伟,王兵树,姜萍.斩波串级调速系统建模与双闭环控制仿真[J].控制工程,2011,18(6):977-981.ZHANG Junwei,WANG Bingshu,JIANG Ping.System modeling and double closed-loop control simulation in chopped wave cascade speed control system[J].Control Engineering of China,2011,18(6):977-981.
[5]江友华,宁宇,吴国祥.基于状态空间平均模型的全数字双闭环斩波内馈串级调速系统[J].控制理论与应用,2007,24(1):109-112.JIANG Youhua,NING Yu,WU Guoxiang.Study on digital dual closed-loop chopper inner-feed cascade variable speed drive system based on state-space averaging model and its application[J].Control Theory&Applications,2007,24(1):109-112.
[6]龚博,程善美,秦忆.基于载波的三电平中点电压平衡控制策略[J].电工技术学报,2013,28(6):172-177.GONG Bo,CHENG Shanmei,QIN Yi.A three-level neutral point voltage balance control strategy based on carriers of SPWM[J].Transactions of China Electrotechnical Society,2013,28(6):172-177.
[7]周德贤,王一华.晶闸管内反馈串级调速与高频斩波串级调速对比[J].电机与控制应用,2007,34(2):42-45.ZHOU Dexian,WANG Yihua.Comparison of cascade speed regulation between inner-feedback and high-frequency chopper in SCR[J].Electric Machines&Control Application,2007,34(2):42-45.
[8]谢军,孙忠献,温晓玲.斩波串级调速系统主电路的分析[J].机电工程,2007,24(9):81-82.XIE Jun,SUN Zhongxian,WEN Xiaoling.Analysis on main circuit in chop-wave cascade speed-regulation system[J].Mechanical&Electrical Engineering Magazine,2007,24(9):81-82.
[9]王清灵,顾军.矿井提升机斩波串级调速系统的研究[J].工矿自动化,2008,12(6):19-22.WANG Qingling,GU Jun.Research of chopping cascade speed-regulation system of mine hoist[J].Industry and Mine Automation,2008,12(6):19-22.
[10]申张亮,郑建勇,梅军,等.基于改进电压空间矢量调制的有源滤波器双滞环电流跟踪控制策略[J].中国电机工程学报,2011,31(15):8-14.SHEN Zhangliang,ZHENG Jianyong,MEI Jun,et al.Double hysteresis current tracking control scheme for active power filter based on improved voltage space vector[J].Proceedings of the CSEE,2011,31(15):8-14.
[11]顾和荣,杨子龙,邬伟扬.并网逆变器输出电流滞环跟踪控制技术研究[J].中国电机工程学报,2006,26(9):108-112.GU Herong,YANG Zilong,WU Weiyang.Research on hysteresis band current tracking control of grid-connected inverter[J].Proceedings of the CSEE,2006,26(9):108-112.
[12]姚致清,张茜,刘喜梅.基于PSCAD/EMTDC的三相光伏并网发电系统仿真研究[J].电力系统保护与控制,2010,38(17):76-81.YAO Zhiqing,ZHANG Qian,LIU Ximei.Research on simulation of a three-phase grid-connected photovoltaic generation system based on PSCAD/EMTDC[J].Power System Protection and Control,2010,38(17):76-81.