Optimal Compensation Models in Cophase Power Supply System
-
摘要: 为消除同相牵引供电系统中的三相不平衡、滤除谐波、补偿无功,讨论了平衡变换的两种最优补偿模型:以波形质量最优为目标的波形畸变最小模型和以获得最佳负载为目标的最佳负载模型.通过仿真分析了系统电压畸变时两种补偿模型的补偿效果.结果表明,波形畸变最小模型使系统只提供负载所需要的基波有功电流,最佳负载模型将不对称的单相负载变成三相(或两相或四相)对称纯阻性负载.在三相系统电压对称无谐波时,两者补偿特性一致;当三相系统电压不对称有谐波时,两者补偿特性有区别.Abstract: To balance the three phases,filter the harmonics and compensate the reactive power in a cophase power supply system,two optimal compensation models were proposed: the minimum waveform distortion model,which can get best waveform quality,and the optimum resistance model,which can get optimum load.Then,the compensation effects of the two models with distortion voltages were analyzed by simulation.The results show that the former can only get fundamental active current,and the latter can transform an unbalanced single phase into a balanced three-(or two-or four-) phase resistant load.The two models have the same compensation characteristics under voltages without distortion and unbalance,and there are differences under voltages with distortion and unbalance.
-
张秀峰,钱清泉,李群湛,等.基于有源滤波器和AT供电方式的新型同相牵引供电系统[J].中国铁道科学,2006,27(6):73-78.ZHANG Xiufeng,QIAN Qingquan,LI Qunzhan,et al.A novel cophase power supply system based on active power filter and at power supply mode[J].China Railway Science,2006,27(6):73-78.[2] 张秀峰,连级三.基于斯科特变压器的新型同相AT牵引供电系统[J].机车电传动,2006(4):14-18.ZHANG Xiufeng,LIAN Jisan.A new cophase AT traction power supply system based on scott transformer[J].Electric Drive for Locomotives,2006(4):14-18.[3] 张秀峰,连级三,高仕斌.基于三相变四相变压器的新型同相牵引供电系统[J].中国电机工程学报,2006,26(15):20-23.ZHANG Xiufeng,LIAN Jisan,GAO Shibin.A new cophase traction power supply system based on three-phase to four-phase transformer[J].Proceedings of the CSEE,2006,26(15):20-23.[4] 李群湛.电气化铁道并联综合补偿及其应用[M].北京:中国铁道出版社,1993:1-13.[5] 李群湛.牵引变电所供电分析及综合补偿技术[M].北京:中国铁道出版社,2006:58-100.[6] 谭秀炳,刘向阳.交流电气化铁道牵引供电系统[M].成都:西南交通大学出版社,2002:15-41.[7] 陈维荣,唐蕾.非理想电压下有源电力滤波器的电流检测[J].西南交通大学学报,2006,41(1):31-36.CHEN Weirong,TANG Lei.Current detection control of active power filter under non-ideal voltage source[J].Journal of Southwest Jiaotong University,2006,41(1):31-36.[8] 王兆安,杨军,刘进军.谐波抑制和无功功率补偿[M].北京:机械工业出版社,2002:209-241.[9] 王茂海,刘会金.通用瞬时功率定义及广义谐波理论[J].中国电机工程学报,2001,21(9):68-73.WANG Maohai,LIU Huijin.A universal definnition of instantaneous power and broad-sere harmonic theory[J].Proceedings of the CSEE,2001,21(9):68-73.[10] 王茂海,刘会金.通用瞬时功率理论的完善与负载性能评价指标的建立[J].中国电机工程学报,2002,22(7):81-84.WANG Maohai,LIU Huijin.Perfecting of the universal instantaneous power theory and presentation of load performance index[J].Proceedings of the CSEE,2002,22(7):81-84.[11] 杨杰,赖声礼,李心广,等.三相电压不对称时谐波与基波有功、无功电流的精确检测方法研究[J].继电器,2003,31(4):6-9.YANG Jie,LAI Shengli,LI Xinguang,et al.Research on precision detection method of harmonies fundamental active current and reactive current in the case of asymmetrical three-phase voltage[J].Relay,2003,31(4):6-9.
点击查看大图
计量
- 文章访问数: 1644
- HTML全文浏览量: 96
- PDF下载量: 369
- 被引次数: 0