基于逆变型微电源的低压微电网运行仿真分析  

Operation simulation analysis of low voltage microgrid composed of inverter-based micro sources

作　　者：张继红[1] 赵杰[1] 吴振奎[1] 宋文隽[1] 

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010

出　　处：《电测与仪表》2015年第1期30-34,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51367012)

摘　　要：针对以逆变器为接口的微电源和蓄电池储能单元,文章简述了P/Q控制策略,重点分析了蓄电池储能单元的逆变器下垂控制策略,提出了适用于低压系统中的改进的P/V下垂控制策略。该策略加入了功率微分项,减少了功率计算环节所引起的滞后;加入电压和频率偏差的前馈调节,实现电压和频率的再次调节,减小了有差调节所带来的偏差。同时,建立了低压微电网模型。重点仿真了微电网运行模式切换以及孤岛下投切负荷等情况,验证了蓄电池改进下垂控制策略的正确性以及微电网模型运行的稳定性。For the micro source and energy storage unit with inverter interface, the paper summarizes P/Q control strategy, analyzes the droop control strategy of battery energy storage in detail, and proposes an improved P/V droop control strategy in low voltage system. The strategy adds power differential term to reduce the lag caused by the power calculation part. By adding feed - forward control on voltage and frequency deviation, the secondary regulation of the voltage and frequency can be achieved, and the deviation caused by error regulation is reduced. The low voltage mi- crogrid model is also built. Operation mode switching of the microgrid and load switching in islanding mode are simu- lated, which verifies the improved droop control strategy of the battery and the stability of the microgrid operation.

关 键 词：低压微电网 逆变型微电源 P/Q控制 P/V下垂控制 运行仿真 

分 类 号：TM743[电气工程—电力系统及自动化]