摘要
随着新能源机组大量接入电力系统,系统惯性水平降低,电网的频率稳定性面临严重挑战,为此本文提出一种考虑火电机组N-1故障下频率安全和储能电池寿命损失抑制的火电厂储能联合发电系统日前调度模型。首先,对于火电厂和储能耦合的联合发电系统,建立了火电厂火电机组N-1故障下频率安全约束。然后,研究了储能电池运行的寿命损失函数,由此建立寿命损失抑制的储能电池运行成本目标函数。随后在其基础上,建立了火电厂储能联合发电系统的日前调度模型,该模型能够在火电机组N-1故障情况下,充分利用储能系统瞬时放电的特性,保证系统频率运行在安全的范围之内,并且使得储能电池的寿命损失百分比比较低。最后,本文对某实际地区的火电厂储能联合发电系统的日前调度模型进行仿真分析,验证了本文所提模型的有效性。
Since a large number of renewable units are integrated to the power system,the system inertia level is reduced,and the frequency stability of the power grid is faced with serious challenges.Therefore,a day ahead scheduling model of combined generation systems of thermal power plants and battery energy storage system(BESS)considering frequency security constraints of N-1 failure for thermal power plants is proposed.Firstly,for combined generation systems of thermal power plants and BESS,a frequency safety constraint is established for the N-1 fault of thermal units.Then,on this basis,the day⁃ahead scheduling model of combined generation systems of thermal power plants and BESS is established,which can rapidly increase the power by using the characteristics of the instantaneous discharge of BESS under N-1 failure of thermal power plants,and thus ensure that the system frequency can be operated in the secure range,while making the life damage percentage of the energy storage bat⁃tery relatively low.Finally,this paper simulates and analyzes this proposed day ahead scheduling model in a practi⁃cal case study,and verifies the effectiveness of the proposed model.
作者
沈玉明
王强钢
桂旭
徐加银
王绪利
冯沛儒
江桂芬
SHEN Yuming;WANG Qianggang;GUI Xu;XU Jiayin;WANG Xuli;FENG Peiru;JIANG Guifen(Economic Research Institute of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230000,China;State Key Laboratory of Power Transmission Equipment Technology(Chongqing University),Chongqing 400044,China)
出处
《电工电能新技术》
北大核心
2025年第11期120-128,共9页
Advanced Technology of Electrical Engineering and Energy
基金
国网安徽省电力有限公司经济技术研究院科技项目(B6120923000A)。
关键词
日前调度模型
频率安全
储能系统
储能电池寿命损失
day⁃ahead scheduling model
frequency security constraints
battery energy storage system
life dam⁃age of energy storage battery
