非理想电网条件下大容量混合风电场运行理论与柔性控制技术研究

项目名称： 非理想电网条件下大容量混合风电场运行理论与柔性控制技术研究

项目编号： No.51477016

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 姚骏

作者单位： 重庆大学

项目金额： 80万元

中文摘要： 随着含双馈型风电系统和全功率型风电系统为主的大容量混合风电场在电网中逐步规划和建设，如何提高其在大规模远距离接入电网后的安全稳定运行能力成为值得研究的课题。本项目针对其在电网电压不平衡、电网谐波电压以及电网短路故障等非理想电网条件下的电网适应能力和故障穿越等问题，以典型的双馈风电系统和永磁直驱风电系统构成的混合风电场为研究对象，建立该混合风电场的动态等值模型，分析其在电网电压不平衡、电网谐波电压以及电网短路故障等非理想电网下的运行特性，详细推导和分析双馈风电场和永磁直驱风电场在非理想电网下的可控运行区域，提出各种工况下混合风电场的协同控制方法，并探索线路参数和风电场容量比等因素对协同控制效果的影响。通过对大容量混合风电场接入电网后的运行特性展开全面分析和研究，进一步获得大规模风电场在非理想电网条件下的运行理论和柔性并网控制技术，为实现最大规模风电接入电网的系统安全和稳定运行奠定理论基础。

中文关键词： 风力发电；大容量混合风电场；双馈感应风电系统；全功率型风电系统；非理想电网

英文摘要： With the development of large-scale wind farm with doubly fed induction generator (DFIG)-based wind turbine and full-scale converter-based wind turbine in the power grid, how to improve the safely stable operation capability under remote grid-connection conditions becomes to be an interesting topic. This project focuses on the issues about the operation adaptability and fault ride-through capability for the hybrid wind farm under non-ideal grid conditions such as unbalanced grid voltage, distorted grid voltage and grid short circuit faults. The operation principle and coordinated control method for the hybrid wind farm composed by two typical wind turbines including DFIG-based wind turbine and direct-driven permanent magnet synchronous generator (PMSG)-based wind turbine will be investigated. Firstly, the dynamic equivalent model of the hybrid wind farm will be established, and the operation characteristics of the hybrid wind farm under non-ideal grid conditions will be analyzed. Furthermore, the controllable operation area of the DFIG-based wind farm and PMSG-based wind farm will be deduced and analyzed respectively, and the coordinated control strategy for the hybrid wind farm will be proposed. Finally, the influences of the transmission line parameters and the ratio of wind farm capacity will be considered and investigated. With the comprehensive analysis and study of operation characteristics for the large-scale hybrid wind farm integrated into the grid, the operation theory and flexible grid-connection control technology for the large-scale wind farm can be further achieved, which will also lay the theoretical foundation for maximum-scale wind power generation integrated with the grid.

英文关键词： wind power generation;large-scale hybrid wind farms;doubly fed induction generator (DFIG)-based wind turbine generation system;full-scale converter-based wind turbine generation system;non-ideal grid conditions