直驱永磁风力发电机的变系数PD虚拟惯量控制研究
Study on Variable-coefficient Virtual Inertia Control of Directly-driven Permanent Magnet Synchronous Generator
唐杰 1刘琳 1黄肇 1邵武 1刘白杨 1易资兴1
作者信息
- 1. 多电源地区电网运行与控制湖南省重点实验室 (邵阳学院),湖南 邵阳 422000
- 折叠
摘要
传统PD虚拟惯量控制虽然能有效避免无惯量情况下频率的二次跌落问题,但应对风速变化时,传统控制方法中固定的惯性系数可能导致惯量响应中惯量的过余或不足,风机输出有功功率延时变化,影响系统频率的变化,惯量响应效果不理想.为此,在搭建PD虚拟惯量控制模型的基础上,综合考虑转子动能与风速变化对虚拟惯量调节的影响,通过当前风速与下一时刻预测风速对应的旋转动能超前算出满足系统的变微分系数,优化传统控制方法中的风机辅助功率,匹配系统适时的惯量效应,在系统频率调整方面具有更高的灵活性,同时避免了传统控制方法机械、固定的全惯量支撑,减小机组的调频压力.最后通过仿真验证了所提策略的有效性.
Abstract
Conventional PD virtual inertia control can effectively avoid the problem of frequency quadratic drop in the absence of inertia.But its fixed inertia coefficient may lead to over-or under-inertia in inertia response under varying wind speed,resulting in changes in output active power delay of wind turbines,impact on frequency change,and unsatisfactory inertia response utility.In this paper,based on the construction of the PD virtual inertia control model,the influence of rotor kinetic energy and wind speed changes on the adjustment of virtual inertia is comprehensively considered.By pre-calculating the forward rotation energy corresponding to the predicted wind speed of the next moment with the current wind speed,the variable differential coefficient satisfying the system is obtained,and the auxiliary power of the wind turbine in the traditional control method is optimized to match real-time inertia effect of the system frequency adjustment with higher flexibility,while avoiding mechanical and fixed full inertia support in traditional control methods and reducing frequency regulation pressure of the unit.The effectiveness of the proposed strategy is verified through simulation.
关键词
虚拟惯量控制/惯量响应/惯量系数/频率调整Key words
virtual inertia control/inertia response/inertia coefficient/frequency adjustment引用本文复制引用
基金项目
邵阳学院研究生创新项目(CX2022SY037)
湖南省教育厅科研项目(22C0448)
湖南省联合基金(2022JJ50206)
湖南省自然科学基金(2023JJ50263)
出版年
2024
NETL
NSTL
万方数据