摘要
火电机组的一次调频性能不仅对电网的安全稳定有重要意义,也关系到机组本身运行经济性。为实现机组一次调频性能的优化,通过系统辨识构建符合机组实际特性的汽轮机调节系统,并增加一个阀门流量非线性环节使模型结构更为真实。基于模型实现了对一次调频影响因素的量化分析,根据分析结果修正了阀门流量函数,增加主汽压力修正环节,基于鲁棒性考虑实现了对一次调频控制参数的重新整定,最终使机组一次调频功能设置更趋合理。实际机组的一次调频试验表明:不同负荷条件下,调整后机组负荷响应速度指标均能满足规程要求,故其一次调频性能是令人满意的。
The performance of the primary frequency regulation in thermal power unit is of importance to the stability of power system and its economy. To optimize the performance,a model of steam turbine and its governing system were established based on system identification,and a key element of valve discharge characteristics was introduced into the model for its optimization. Through the improved model,performance factors of primary frequency regulation were quantitatively analyzed. According to analysis result,the valve discharge characteristic function was corrected,and the main steam pressure compensation was also brought into consideration,then control parameters of primary frequency regulation were re-tuned by considering robustness. Consequently,as indicated by the actual primary frequency regulation test,the performance of primary frequency regulation was satisfactory under multi-load conditions.
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第10期109-114,130,共6页
Journal of Engineering for Thermal Energy and Power
基金
国网湖南省电力公司科技项目(5216A515002D)
关键词
汽轮机调节系统
建模
一次调频
阀门流量特性
主汽压力
参数整定
steam turbine and its governing system
modeling
primary frequency regulation
valve discharge characteristics
main steam pressure
parameter tuning
