基于权重系数校正的火储两阶段联合调频方法
Two-stage Frequency Regulation Method for Energy Storage Coordinated with Thermal Power Unit Based on Weight Coefficient Correction
王益斌 1陈飞雄 1邵振国 1张抒凌 2张伟骏 2李智诚2
作者信息
- 1. 福州大学电气工程与自动化学院(福建省电器智能化工程技术研究中心),福建福州 350108
- 2. 国网福建省电力有限公司电力科学研究院,福建福州 350007
- 折叠
摘要
随着不确定性可再生能源大规模并网,电网频率特性日益复杂.传统火电机组具有响应时间长、无法准确跟踪指令等问题,亟须利用储能提高火电机组参与自动发电控制(automatic generation control,AGC)调频时的调节性能.首先,针对调频考核规则,建立调频性能指标数学模型,并考虑火储系统出力特性,结合改进层次分析法校正调频子指标权重系数,以此构建以调频性能最优为目标的第一阶段优化模型;在此基础上,为了减少储能荷电状态(state of charge,SOC)越限和深度充放情况,以储能SOC偏差最小为目标构建第二阶段优化模型.仿真验证表明:所提的两阶段调频方法能够提高火储联合系统的调频性能和调频收益,同时有效减少储能深度充放情况和工作寿命损耗,提高储能辅助调频服务的可持续性.
Abstract
With the large-scale uncertain renewable energy connected to the grid,the frequency characteristics of the power grid are increasingly complex.Plagued by long response times and the inability to accurately track frequency regulation commands,traditional thermal power units call for urgent improvement in the performance of its participation in frequency regulation of automatic generation control(AGC)of thermal power by use of energy storage.Therefore,firstly,the mathematical model of frequency regulation performance index is established according to frequency regulation assessment rules.Besides,considering the output characteristics of the energy storage system,combined with the improved analytic hierarchy process to correct the weight coefficient of the frequency regulation sub index,the first-stage optimization model aiming at the optimal AGC performance is constructed.On this basis,in order to reduce the limit crossing and storage depth charging&discharging cases at the state of charge(SOC),the second-stage optimization model is constructed in order to minimize the SOC deviation.The simulation verification shows that the two-stage frequency regulation method proposed in this paper can improve the frequency regulation performance and benefits of the system of energy storage coordinated with thermal power unit,while reducing the energy storage in-depth charging&discharging cases and working life loss,thus improving the sustainability of frequency regulation auxiliary service of energy storage.
关键词
调频辅助服务/储能/自动发电控制/改进层次分析法/两阶段调频Key words
frequency regulation auxiliary service/energy storage/automatic generation control/improved analytic hierarchy process/two-stage frequency regulation引用本文复制引用
基金项目
国家自然科学基金青年基金(52107080)
福建省自然科学基金青创项目(2021J05135)
国家电网福建省电力公司科技项目(521304200059)
出版年
2024
国家科技期刊平台
NSTL
万方数据