摘要
针对电气化铁路存在的负序、谐波和无功的电能质量问题以及机车过分相问题,提出一种基于模块化多电平变换器MMC(Modular Multilevel Converter)的新型同相牵引供电系统。其较传统的同相供电系统优势在于:使用目前高铁普遍采用的结构简单的V/V变压器替代结构复杂的平衡变压器;APC采用三相换流器替代单相背靠背换流器,可节省一相换流器桥臂;三相换流器采用MMC结构,可省去降压隔离变压器。同时提出相应的控制策略用于补偿机车负载的负序、谐波和无功。仿真验证了新型同相牵引供电系统的正确性和有效性。
In view of the negative sequence,harmonics and reactive power quality problems of the electric railway,and the problem of locomotive passing the phase separation system,a new type of traction power supply system based on MMC was presented in this paper.Compared with the conventional co-phase power supply system,its advantages lie in：the V/V transformer with simple structure,which is widely used in high speed railway,is used to replace the balance transformer with complicated structure.APC adopts three-phase converter instead of single-phase back-to-back converter,which can save one phase converter bridge arm.The three-phase converter using MMC structure can save a step-down and isolation transformer.At the same time,the corresponding control strategy was put forward to compensate the negative sequence,harmonics and reactive power of the load.Finally,The simulation results showed the correctness and effectiveness of the proposed new type traction power supply system.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2017年第4期25-31,共7页
Journal of the China Railway Society
关键词
电气化铁路
新型同相供电
模块化多电平变换器
有源补偿器
V/V变压器
电能质量
electrified railway
new co-phase power supply system
modular multilevel converter（MMC）
active power compensator（APC）
V/V transformer
power quality
