摘要
针对目前电气化铁道AT或直供系统中普遍存在的负序、谐波和功率因数低等电能质量问题,提出了一种基于YN_接线平衡变压器的电气化铁道电能质量综合治理系统.该系统充分挖掘了YN_型牵引变压器二次侧可带三相系统的潜能,在无需降压变压器的情况下,实现了三相全桥型有源功率调节系统和主牵引变压器的融合.给出了该系统的构成方式,分析了该系统补偿负序、谐波和无功的基本原理,提出了电流检测和控制方法.根据实际变电站参数和实测牵引负荷数据建立了该系统的仿真模型.仿真结果表明所提系统具有良好的负序、谐波和无功补偿性能.
A novel power quality conditioning system based on the YN_ ∨ balance transformer to improve the power quality, such as negative sequence, harmonic and lower power factor in electric railways with AT or direct power supply, was proposed. The system fully uses the potential of the traction transformer secondary side with three-phase system, and it integrates the three-phase full-bridge active power regulation system with the main transformer omitting step-down transformer. The composition method of the system, the principle of the compensation of the negative sequence and harmonic and reactive power were described. The current detection and control methods were also proposed. According to the actual parameter and measured data in a substation, a system simulation model was built. The results indicate that the proposed system has excellent performance in the compensation of the negative sequence, harmonic and reactive power.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第8期54-59,共6页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51077044)
湖南省自然科学基金重点资助项目(12JJ2034)
关键词
负序
谐波
平衡变压器
电气化铁道
电能质量治理
negative sequence
harmonic
balance transformer
electric railway
power quality im-provement
