p-q-r理论在电压凹陷检测中的应用
首发时间:2008-09-22
摘要:动态电压调节器是目前解决电压凹陷问题的较好选择,文章基于p-q-r理论,通过以单相电源作为参考电压构造虚拟三相系统及多次坐标变换,提出了一种在单相系统中实时检测电压凹陷并计算补偿电压的方法。在p-q-r坐标下控制器能快速计算出电压有效值和补偿电压,补偿电压经过反变换即可得到a-b-c坐标下各相的补偿电压。仿真结果证明基于p-q-r理论的检测方法具有很好的静态和动态特性。
关键词: 电压凹陷 p-q-r理论 零序电压 电压畸变 动态电压调节器态电压调节器
For information in English, please click here
APPLICATION OF p-q-r THEORY IN SINGLE-PHASE DYNAMIC VOLTAGE REGULATOR
Abstract:At present dynamic voltage regulator (DVR) is a better manner to solve the voltage sag. According to the p-q-r theory and by means of constituting a suppositional three phases system by using single phase power supply as voltage reference and conducting the repeatedly coordinate transformation, a real-time method to detect voltage sag in single phase system and calculate the compensating voltage is proposed. After the coordinate transformation the fundamental component at power supply side becomes the dc component in p-q-r coordinate system, so the controller in p-q-r coordinate system can rapidly calculate the effective value of voltage and compensating voltage. By means of inverse transformation, the compensating voltage of three phases in a-b-c coordinate system can be obtained from the compensating voltage in p-q-r coordinate system. The detection method based on p-q-r theory possesses good static and dynamic characteristics. Simulation results show that the proposed method is correct.
Keywords: Voltage sag p-q-r theory Zero-sequence voltage Voltage distortion Dynamicsequence voltage Voltage distortion Dynamic
基金:
论文图表:
引用
No.2424431965912220****
同行评议
共计0人参与
勘误表
p-q-r理论在电压凹陷检测中的应用
评论
全部评论0/1000