摘要
为了研究低电压穿越问题,设计了一套由动态电压恢复器组成的低电压穿越试验系统。提出采用电压dq综合值结合其变化率作为低电压故障发生检测判据,采用电压差前馈结合谐振控制环作为补偿策略,实现对电网低电压故障的快速补偿。经电压补偿试验表明,采用上述低电压故障检测及补偿策略的动态电压恢复器能够快速实现电压补偿。
Low voltage ride through（ LVRT） is an important technical problem for power quality. In order to study LVRT,this paper designed an LVRT experimental system composed of dynamic voltage restorer（ DVR）,and used voltage dq integrated value and its change rate as detection criterion for voltage drops,and used the voltage feed forward and resonance control loop as the compensation strategy,which can achieve fast compensation of low voltage power grid fault. The experiment is completed using above platform. The test results show that DVR which adopts above detection and compensation strategy can achieve the compensation for low voltage fault quickly.
出处
《电器与能效管理技术》
2015年第13期59-62,67,共5页
Electrical & Energy Management Technology
关键词
低电压穿越
动态电压恢复器
电压dq综合值
谐振控制环
low voltage ride-through（LVRT）
dynamic voltage restorer
voltage dq integrated value
resonance control loop
