电网故障条件下储能逆变器无功电流控制与输出极限分析  

The reactive current control and output limit analysis of energy storage inverter

作　　者：刘淳 余畅舟 徐海珍 LIU Chun;YU Changzhou;XU Haizhen(Department of electronic information and electrical engineering,Hefei University,Hefei 230601,China)

机构地区：[1]合肥学院电子信息与电气工程系

出　　处：《电气应用》2020年第1期10-15,共6页Electrotechnical Application

摘　　要：储能逆变器作为一种并网逆变系统同样会受到电网故障的影响。在故障持续阶段,储能逆变器需要向电网注入无功电流,已满足并网导则的需求。针对储能逆变器的低电压穿越条件下的无功输出极限问题,通过引入具有约束范围的最优化算法验证了储能逆变器系统输出正序无功电流的最大值,从无功电流输出角度分析储能逆变器的LVRT能力。As a grid-connected inverter system, energy storage inverters are also affected by grid faults. In the fault duration stage, the energy storage inverters need to inject reactive current into the power grid, which has met the requirements of grid-connected guidelines. Aiming at the reactive power output limit problem of energy storage inverters under the condition of low voltage ride through(LVRT), the maximum output positive sequence reactive current of energy storage inverters is verified by introducing an optimization algorithm with constrained range, and LVRT capability of energy storage inverters is analyzed from the point of reactive current output.

关 键 词：储能逆变器 低电压穿越 无功电流输出 

分 类 号：TM464[电气工程—电器]