摘要
针对单所同相供电和长距离贯通式同相供电,提出一种基于Vv-SVG的电气化铁路同相供电综合补偿方案及控制策略。介绍Vv-SVG的同相供电系统的构成,将同相供电综合补偿方案分为2端口和3端口补偿模式。基于相量图分析牵引和再生工况下的负序补偿原理,引入负序约束因子和无功约束因子,得到2端口和3端口补偿模式下的负序综合补偿数学模型及公共连接点处谐波电流补偿模型。在瞬时无功理论基础上,研究并提出了适用于所提综合补偿方案的控制策略。以某牵引变电所数据为例,说明了所提补偿方案确定方法的有效性,且能够降低补偿装置的容量;通过仿真说明了所提综合补偿方案及控制策略的正确性。
Aiming at the co-phase power supply with one substation and the long-distance interconnected co-phase power supply,a comprehensive compensation scheme and control strategy for the co-phase power supply of electrified railway based on Vv-SVG were proposed.The composition of co-phase power supply system based on Vv-SVG was introduced,and the comprehensive compensation scheme of co-phase power supply was divided into two-port and three-port compensation modes.Based on the phasor diagram,the principle of negative sequence comprehensive compensation under traction and regeneration conditions was analyzed.By introducing constraint factor of negative sequence and constraint factor of reactive power,the mathematical model of negative sequence comprehensive compensation under two-port and three-port compensation modes and model of harmonic current compensation at point of common coupling were obtained.Based on the instantaneous reactive power theory,the control strategy was proposed which is suitable for the proposed comprehensive compensation scheme.In the case of the data of a traction substation,the effectiveness of the proposed method was illustrated,and the capacity of the compensation device can be reduced.The simulation results show the correctness of the proposed comprehensive compensation scheme and control strategy.
作者
王辉
李群湛
解绍锋
高圣夫
WANG Hui;LI Qunzhan;XIE Shaofegn;GAO Shengfu(School of Electric Engineering,Southwest Jiaotong University,Chengdu 611756,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2021年第9期46-55,共10页
Journal of the China Railway Society
基金
国家自然科学基金(51877182)
中国国家铁路集团有限公司科技研究开发计划(SY2020G001)
四川省科技计划资助项目(2021YJ0028)。
关键词
同相供电
负序
Vv接线变压器
静止无功发生器
综合补偿
co-phase power supply
negative sequence
Vv connection transformer
static var generator
comprehensive compensation
