电压跌落下三相整流器低电压穿越自动控制方法  

Automatic Control Method for Low-Voltage Ride Through of Three-Phase Rectifier Under Voltage Drop

作　　者：翟元元 ZHAI Yuanyuan(Henan Yuguang Zinc Industry Co.,Ltd.,Jiyuan,Henan 459000,China)

机构地区：[1]河南豫光锌业有限公司,河南济源459000

出　　处：《自动化应用》2024年第16期54-56,共3页Automation Application

摘　　要：常规的整流器低电压穿越自动控制方法以交流侧功率控制为主,无法满足直流侧电压快速平衡的需求。因此,设计了电压跌落下三相整流器低电压穿越自动控制方法。该方法可跟踪电网电压相位,根据自耦调压原理对整流器低电压穿越进行自耦调压,计算出定值侧无功功率参考值,控制整流器低穿并网点电压阈值,将并网点电压始终控制在合理范围内,实现电压跌落下三相整流器低电压穿越自动控制。通过对比实验,验证了所提方法并网点电压与基线电压几乎一致,说明低穿自动控制效果较好,能够确保并网的稳定运行。The conventional automatic control method for low-voltage ride through of rectifiers mainly relies on AC side power control,which cannot meet the demand for fast balance of DC side voltage.Therefore,an automatic control method for lowvoltage ride through of three-phase rectifiers under voltage drop was designed.This method can track the voltage phase of the power grid,and based on the principle of self coupling voltage regulation,perform self coupling voltage regulation on the lowvoltage ride through of the rectifier.Calculate the reference value of reactive power on the fixed value side,control the voltage threshold of the rectifier′s low-voltage trip through the grid connection point,so that the voltage at the grid connection point is always controlled within a reasonable range,and achieve automatic control of the low-voltage ride through of the three-phase rectifier under voltage drop.Through comparative experiments,it was verified that the proposed method has almost the same voltage at the grid connection point as the baseline voltage,indicating that the low breakdown automatic control effect is good and can ensure stable operation of the grid connection.

关 键 词：自耦调压 整流器 低电压穿越 自动控制方法 电压跌落 定值则 

分 类 号：TM721[电气工程—电力系统及自动化]