摘要
为研究无功补偿和谐波抑制的关键技术中的无功、不对称和谐波电流检测与计算方法,提出基于序分量提取的同步坐标法。研究结果表明:采用无锁相环的广义dq0变换,能准确提取出基波及整数次谐波正、负序以及零序分量;根据不同的无功补偿目标,能准确地检测出基波正序有功电流和基波正序无功电流,分开基波正序无功电流、不对称与谐波电流,实现分别补偿;该法可用于三相三线制和四线制电力系统以及不对称系统;理论推导和仿真结果验证所提方法的正确性。
In order to study the detection method and calculation of reactive power,unbalance and harmonic current,an improved synchronous reference frame method based on sequence component extraction in the time domain was presented.The results show that for the use of general dq0 theory without PLL,the method can accurately extract positive,negative and zero sequence components of both fundamental and integer harmonics,detect fundamental positive sequence active currents and reactive currents,as well as distinguish the fundamental positive sequence reactive current from the sum of unbalanced components and harmonic currents based on different compensating purposes.The proposed method is suitable for the three-phase three-wire or four-wire or unbalanced power system and is verified by theoretical analysis and simulation.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期419-426,共8页
Journal of Central South University:Science and Technology
基金
浙江省科技计划项目(2007C16034)
国家火炬计划项目(2008GH040894)
关键词
序分量提取
同步参考坐标法
检测
不对称系统
sequence component extraction
synchronous reference frame method
detection
unbalanced system
