电网技术2023，Vol.47Issue(12)：4906-4915,10.DOI:10.13335/j.1000-3673.pst.2023.1375
考虑风电机组运行差异化的低电压穿越分散预防控制
Decentralized Prevention and Control of Low Voltage Ride Through Considering Differential Operation of Wind Turbines
摘要
Abstract
This paper proposes a short-term voltage dispersion prevention control strategy for wind farms that considers the differentiation of unit statuses to address the issue of poor universality in the traditional low-voltage control strategies for the grid-connected doubly-fed wind farms under the multi-voltage disturbance scenarios.Firstly,the dynamic characteristics of low-voltage ride-through for the doubly-fed wind farms equipped with the reactive power control and the Crowbar protection circuits are analyzed to determine the current and impedance characteristics of each wind turbine unit during the low-voltage ride-through.Subsequently,the node voltage method,by considering the impedance variation within the wind farm,is employed to establish a dynamic relationship between the injected current of each unit and the terminal voltage,thereby determining the impact level of each unit on the node voltages within the station during the low-voltage ride-through.Furthermore,the voltage control objectives for wind farms under different voltage disturbance scenarios are designed,and a prevention control strategy for wind farms adaptable to various voltage sag depths is formulated.Finally,a wind farm consisting of four doubly-fed wind turbine units and a realistic electromagnetic transient model of an actual wind farm are built in the Simulink and RTLAB OP5600 real-time digital simulation platform to validate the effectiveness of the proposed wind farm control strategy.关键词
风电场/电压支撑/电压计算/低电压穿越Key words
wind farm/voltage support/voltage calculation/low voltage ride through分类
信息技术与安全科学引用本文复制引用
陈厚合,王子琦,王长江,姜涛,刘先超,李国庆..考虑风电机组运行差异化的低电压穿越分散预防控制[J].电网技术,2023,47(12):4906-4915,10.基金项目
国家自然科学基金项目(52377083) （52377083）
国家自然科学基金委-国家电网公司智能电网联合基金项目(U2066208).Project Supported by the National Natural Science Foundation of China(52377083) （U2066208）
Joint Foundation of Smart Grid of the National Natural Science Foundation of China-State Grid Corporation of China(U2066208). （U2066208）
