| 引用本文: | 张钦智,王宾,李琰,刘超.风电场经柔性直流输电系统故障穿越协调控制研究[J].电力系统保护与控制,2020,48(10):131-138.[点击复制] |
| ZHANG Qinzhi,WANG Bin,LI Yan,LIU Chao.Research on fault crossing coordination control of a wind farm via a flexible direct current transmission system[J].Power System Protection and Control,2020,48(10):131-138[点击复制] |
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| 摘要: |
| 当大型风电场经柔性直流输电系统长距离输送时，需解决交流电网故障时导致直流功率过剩及电压上升等问题。传统方法中仅用卸荷电路或改变控制策略都各自存在缺陷，不能够快速、经济、可靠地完成故障穿越。针对以上问题，提出一种投入自调控耗能电阻与通过风场最大功率跟踪减少输送功率相结合的故障穿越协调控制策略。在故障初期投入耗能电阻来弥补控制策略通信延时的问题。其次在引入最大功率跟踪减载后，可适当退出部分耗能电阻，从而避开单一方案的缺点，取得更好的故障穿越效果。最后基于PSCAD/EMTDC建立模型，仿真验证了该协调控制策略的有效性。 |
| 关键词: 柔性直流输电 双馈风力发电 自调控耗能电阻 最大功率跟踪 故障穿越协调控制 |
| DOI：10.19783/j.cnki.pspc.190769 |
| 投稿时间：2019-07-03修订日期：2019-10-15 |
| 基金项目:北京市自然科学基金(20151100094);新能源与储能运行控制国家重点实验室开放基金项目资助(NYB51201901143) |
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| Research on fault crossing coordination control of a wind farm via a flexible direct current transmission system |
| ZHANG Qinzhi,WANG Bin,LI Yan,LIU Chao |
| (College of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255049, China;Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;China Electric Power Research Institute Co., Ltd., Beijing 100192, China) |
| Abstract: |
| When output from large wind farms are transported over a long distance by flexible HVDC transmission system, problems such as excessive DC power and voltage rise need to be solved if the AC power grid fails. The use of unloading circuit or changing control strategy has its own shortcomings, so they couldn’t finish the fault ride through fast, efficiently, and reliably. Given these problems, a fault-crossing coordinated control strategy is proposed. This combines a self-regulating energy dissipation resistor with reducing transmission power through maximum power tracking in the wind field. At the beginning of the fault, an energy dissipation resistance is put in to compensate for the communication delay of the control strategy. Secondly, after the introduction of maximum power tracking load shedding, some of the energy dissipation resistance can be withdrawn appropriately, so as to avoid the shortcomings of a single scheme and achieve better effect. Finally, the simulation verifies the effectiveness of the coordinated control strategy by PSCAD/EMTDC. This work is supported by Beijing Natural Science Foundation (No. 20151100094) and State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (No. NYB51201901143). |
| Key words: VSC-HVDC double-fed wind power generation self-regulating energy dissipation resistance MPPT fault traversing coordinated control |
