电测与仪表2017，Vol.54Issue(2)：31-37,7.
直流微网低电压穿越控制策略研究
LVRT control strategy for DC micro-grid
孟明 1贺海博 1王志鹏 2李圆智1
作者信息
- 1. 华北电力大学电力工程系,河北保定071003
- 2. 国网石家庄供电公司,石家庄050000
- 折叠
摘要
Abstract
In view of the low voltage ride through (LVRT) issue of DC micro-grid system,the power flow characteristics under different operating conditions are analyzed,and an overall control method of the coordinated control for photovoltaic/battery storage/loads as well as the coordinated control for the active and reactive power is put forward,which is based on the comprehensive considerations of the LVRT control requirements and the effect for system operation comes from the random fluctuations of PV outputs and load during the fault.During low voltage of the system,the coordinated control for photovoltaic/battery storage/load can maintain the constant DC bus voltage and balance the power of system.Meanwhile,the grid-side converter is employed to realize the coordinated control for the active and reactive power according to the grid voltage change level,thus providing reactive power to support grid-side voltage recovery and avoid over-current of the grid-side converter output.Finally,the results implemented in Matlab/Simulink platform show that the proposed control strategy can achieve the optimal utilization of energy,meet the LVRT control requirements and ensure the reliable operation of the system,so that the effectiveness of the LVRT control strategy is verified.关键词
直流微网/光储荷协调控制/低电压穿越/有功无功协调控制/电压支撑Key words
DC micro-grid/coordinated control for photovoltaic/battery storage/load/low voltage ride through (LVRT)/coordinated control for active and reactive power/voltage support分类
信息技术与安全科学引用本文复制引用
孟明,贺海博,王志鹏,李圆智..直流微网低电压穿越控制策略研究[J].电测与仪表,2017,54(2):31-37,7.
