摘要
为了减少电力牵引负荷对电能质量的影响,以Y/△-11接线的牵引变压器为例,分析了由电力牵引负荷引起的负序电流和电压损失,提出了以无功功率和母线电压为约束条件、以负序电流为目标函数的牵引变电站动态无功补偿控制的数学模型。根据电力牵引负荷的变化,计算出两供电臂所需的补偿容量,可在提高功率因数的同时,有效地减少牵引变压器高压侧的负序电流和低压侧的电压损失。
In order to reduce the influence of traction load on power quality,taking the Y/△- 11 traction transformer as an example,the negative sequence current and voltage loss caused by traction load are analyzed. With reactive power and bus voltage as constraints and negative sequence current as objective function,a mathematical model of dynamic reactive power compensation control in the traction substation is put forward. Compensation capacities of two power supplying arms can be calculated according to traction loads. The method can heighten power factor and simultaneously decrease the negative sequence current at high- voltage side and the voltage loss at low-voltatre side.
出处
《电力自动化设备》
EI
CSCD
北大核心
2006年第9期20-22,33,共4页
Electric Power Automation Equipment
关键词
牵引变电站
无功补偿
负序电流
电压损失
traction substation
reactive power compensation
negative sequence current
voltage loss
