摘要
随着大规模的新能源并网,电力系统的频率稳定问题面临着巨大挑战。由于火电机组惯量更大,可以深度挖掘其一次调频的潜力,通过分频装置对一次调频系统的反馈信号进行分解得到不同频段的信号,对不同频段信号设置适当的频率死区区间,从而能够分频段对火电机组进行控制调节,进而改善提升火电机组的一次调频性能。为了研究机组分频控制对系统一次调频能力的影响,在仿真软件中搭建电力系统一次调频模型,在不同工作环境状况下的仿真结果表明分频控制能够有效地改善系统调频性能。此外,还引入锅炉的协调控制系统模型。通过对锅炉主蒸汽压力的分析,验证了该策略在加强机组一次调频能力的同时,也提高了机组的稳定性。
With the large-scale grid connection of new energy,the frequency stability of power system is facing great challenges.Due to the larger inertia of thermal power units,the potential of primary frequency modulation can be deeply explored.The feedback signal of primary frequency modulation system was decomposed by frequency division device to obtain signals of different frequency bands,and appropriate frequency dead band interval was set for signals of different frequency bands,so that the thermal power units can be controlled and adjusted by frequency division,thus improving and improving the primary frequency modulation performance of thermal power units.In order to study the influence of unit frequency division control on the primary frequency modulation capability of the system,the primary frequency modulation model of the power system was built in the simulation software.The simulation results under different working conditions show that the frequency division control can effectively improve the system frequency modulation performance.In addition,the coordinated control system model of the boiler was also introduced.Through the analysis of the main steam pressure of the boiler,it is verified that this strategy not only strengthens the primary frequency regulation ability of the unit,but also improves the stability of the unit.
作者
沈烨昱
牛玉广
杜鸣
张国斌
霍红岩
郭瑞君
SHEN Ye-yu;NIU Yu-guang;DU Ming;ZHANG Guo-bin;HUO Hong-yan;GUO Rui-jun(School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China;Inner Mongolia Electric Power Research Institute,Hohhot 010020,China)
出处
《科学技术与工程》
北大核心
2023年第36期15498-15505,共8页
Science Technology and Engineering
基金
国家自然科学基金(52206009)
内蒙古电力(集团)有限责任公司科技项目(2022-26)。
关键词
一次调频
火电机组
分频器
调频死区
锅炉主蒸汽压力
primary frequency regulation
thermal power unit
frequency divider
frequency modulation dead band
boiler main steam pressure
