摘要
由于逆变型分布式电源在中低压配电网中渗透率的增加,区域配电网运行模式及网内DG控制方式会对故障后输出的电流及端口电压产生明显影响。文章首先分析了区域配电网并网运行模式下电压控制和电流控制IBDG在PQ策略下的故障特性,然后分析了孤岛下电压控制IBDG在Droop策略下的故障特性,为了抑制电压波动并调节系统电压,设计了一种容性等效输出阻抗的电压电流环,并建立了子配网孤岛下不同故障类型的分析计算模型。最后基于PSCAD搭建了仿真模型,通过仿真分析验证该方法的正确性与有效性。
The ever growing penetration of distributed generation in a distribution network has a profound impact on network protection and fault characteristics. Power electronic inverter-based DG （IBDG） are of special concern in distribution network fault characteristics analysis. In this paper, the effects of voltage and current controllers for IBDGs under PQ control scheme on grid operation of distribution network sub-region are investigated and compared. The Droop control scheme of IBDG is analyzed and the sub-region fault analysis model under island operation is established. For significantly against the voltage deviation and adjust voltage during fault, a voltage-current inner loop with capacitive equivalent output impedances is designed. At last, the results verify the feasibility and validity of theory and method based on PSCAD.
作者
逯怀东
张庆
杜景远
吕平
许明
熊雄
井天军
Lu Huaidong Zhang Qing Du Jingyuan Xu Ming Xiong Xiong Jing tianjun(Jinan Power Company, Shandong Power Cooperation of State Grid, Jinan 250012, China College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China)
出处
《可再生能源》
CAS
北大核心
2016年第12期1786-1791,共6页
Renewable Energy Resources
基金
国家自然科学基金(51407186)
关键词
分布式发电
电压型逆变器
电流型逆变器
等效输出阻抗
孤岛运行
控制策略
distributed generation
voltage type inverter
current type inverter
equivalent output impedance
island operation
control scheme
