【摘要】 风力发电在资源消耗、能源安全以及生态友好等方面优势愈加明显,得到了飞速发展。研究风电并网系统的小干扰稳定性及其动态特性具有重要意义,针对含风电系统存在的低频振荡问题,提出采用频率响应法设计功率阻尼控制器(POD)的参数,提高系统的稳定性,使含欠阻尼模态的风电并网系统的阻尼比达到10%以上。最后,以经典四机两区系统为算例,通过所提设计方法对POD控制器参数设计,仿真对比分析静止无功补偿装置(SVC)投入和未投入所设计POD控制器两种情况下,含双馈感应风机(DFIG)并网系统的阻尼特性,验证文中提出设计方法的有效性和可行性。仿真结果表明:所提基于频率响应的POD参数设计方法,有效地改善了系统阻尼特性,达到了设计要求。更多还原

【Abstract】 Because of the benefits of wind power in the energy cost reduction and energy security,the use of wind power is spreading.It has important sense to studies small signal stability and dynamic stability of the study system connected with the wind power. An approach based on the method of frequency response is introduced to design the power oscillation damping( POD) controllers for improving the system stability;by designing an appropriate POD controllers,the damping ratio of the test system could reach 10%.The parameters of POD controller design of the system in the original four-machine,two-area study system with doubly-fed induction generator( DFIG)-base wind farm.The modal analysis and the time-domain simulation are used for comparing the validity and effectiveness of the POD controllers with disconnecting POD controllers.The simulation results show that the proposed design method can effectively improve the damping characteristics of the system,and meet the design requirements well.更多还原