电气传动2016，Vol.46Issue(10)：49-53,5.DOI:10.19457/j.1001-2095.20161010
不平衡故障下光伏并网系统控制策略研究
Research on Control Strategy of Photovoltaic Grid-connected System under Unbalanced Faults
王慧 1冯小萍 2王晓飞 2南东亮 2王密娜 2高明明2
作者信息
- 1. 华北电力大学新能源电力系统国家重点实验室，河北 保定 071003
- 2. 国网新疆电力公司，新疆 乌鲁木齐 830002
- 折叠
摘要
Abstract
DC bus voltage and grid-connected current of the traditional two-stage PV inverter will be unstable under power grid′s unbalanced fault,which causes the PV inverter′s outage due to overvoltage or overcurrent. Outage of the PV inverter can worsen the secure operation of power grid and cause more serious accidents. To solve this problem,a control strategy was presented based on analysis of the three-phase PV grid-connected inverter system′s topology and control method. During the fault of power grid,the proposed strategy could not only ensure the stability of DC bus voltage and grid-connected current,but also make the PV inverter to provide a certain reactive power support to the grid. An experimental system and digital simulation platform of the three-phase PV grid-connected inverter system were built,and the validity and superiority of the proposed control strategy under the power grid′s unbalanced fault are verified by simulation results.关键词
光伏逆变系统/不平衡故障/直流电压/并网电流Key words
photovoltaic inverter system/unbalanced faults/DC-voltage/grid-connected current分类
信息技术与安全科学引用本文复制引用
王慧,冯小萍,王晓飞,南东亮,王密娜,高明明..不平衡故障下光伏并网系统控制策略研究[J].电气传动,2016,46(10):49-53,5.
