Control strategy for inverter-interfaced distributed generation during unbalanced voltage sag considering scenario classification

被引：0
|
作者：
Shi J. [1 ]
Ji L. [1 ]
Chang X. [2 ]
Hong Q. [3 ]
Cao Z. [1 ]
Mi Y. [1 ]
Bao Z. [1 ]
Zhang L. [1 ]
机构：
[1] School of Electrical Engineering, Shanghai University of Electric Power, Shanghai
[2] State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan
[3] University of Strathclyde, Glasgow
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2020年 / 48卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Control strategy; Current limitation; Inverter-interfaced distributed generation; Scenario classification; Unbalanced voltage sag; Voltage support;
D O I：
10.19783/j.cnki.pspc.191507
中图分类号：
学科分类号：
摘要：
During voltage sag, the Inverter-Interfaced Distributed Generation (IIDG) may suffer from overcurrent and disconnection, which affect the safe and stable operation of IIDG and the power system. Thus, a new IIDG control strategy considering different operation scenarios is proposed. First, by considering the phase voltage amplitude constraint, a positive sequence components-based voltage support method is established. This maximizes the voltage support capability. To fully use the inverter capacity and ensure its safety, a scenario classification method considering the severity of voltage sag and the active power of the IIDG is presented. Based on the current injection mode of each scenario and the control objectives, the reference currents are calculated to ensure voltage support and current limitation. By delivering the active power and negative sequence reactive power, both system stability and voltage imbalance are improved. Finally, a simulation model with IIDG is established based on Matlab/Simulink. The simulation results verify the effectiveness of the proposed strategy. © 2020, Power System Protection and Control Press. All right reserved.
引用
收藏
页码：9 / 17
页数：8
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