摘要
本文介绍了应用于电气化铁路牵引网的静止无功发生器(SVG)的工作原理,对比了SVG的直接电流控制和间接电流控制策略的优缺点,设计了SVG电压调节的控制策略,采用基于直接电流控制法的双闭环控制的控制策略即电压外环反馈和电流内环反馈,根据SVG的工作原理和文中设计的控制策略,应用MATLAB7.0/SIMULINK软件进行了仿真,仿真结果表明所设计的SVG能够快速、准确地补偿了牵引供电系统的电压跌落和波动,保持系统供电电压的稳定性,还可以解决因电压跌落引起的牵引变压器二次侧的电流过大问题而引起的牵引变电所的过流保护装置误动作问题,验证了SVG调节方案的可行性,有效提高了牵引供电系统的供电质量、可靠性和安全性。
The paper introduces the working principle of SVG and compared the advantages and disadvantages of direct current and indirect current control of SVG,then designed SVG＇s control strategy for voltage regulation：the control strategy of double closed-loop control based on direct current control method-voltage outer loop and current loop control strategy.According to the work principle and the design of SVG,the paper use MATLAB7.0/SIMULINK simulated the system＇s movement situation.The simulation results show that：SVG can well realize the function,can fast and accurately compensate the voltage sag and the fluctuation of traction power supply system;keep the system supply voltage stability;improve the power supply voltage and solve over current protective device＇s malfunction due to voltage sag.Verified the design＇s feasibility,the design can effectively improve the traction power supply system＇s power quality,reliability and safety.
出处
《变频器世界》
2015年第6期42-45,共4页
The World of Inverters
关键词
静止无功发生器
直接电流控制
电压跌落
电压补偿
Static vat generator
Direct current control
Voltage sag
Voltage compensation
