为促进太阳能、风能等新能源消纳,进一步拓宽火电储能技术升级和灵活性改造渠道,助力双碳目标和新型电力系统建设,提出增设储能系统辅助火电机组调频以解决火电机组爬坡慢、机组振荡不稳定等问题。基于国内外研究现状,提出机组以及储能系统荷电状态出力控制策略模型,通过Matlab/Simulink搭建两区域电网进行模拟仿真。结果表明,在阶跃扰动下区域1机组耦合1 MW飞轮储能系统后,峰值降至1.93×10-3 pu,降低4×10-4 pu,占原频率波动率的9.39%,机组实际出力从2.45×10-2 pu降至1.61×10-2 pu,降低34%。结果表明,在外界相同扰动条件下,采用飞轮储能辅助火电机组调频可有效减小系统频率波动量,减少汽轮机输出功率波动,提升调频性能。
Abstract
The rapid development of new energy sources has had a certain impact on the original power grid structure, leading to increased wear and tear of unit equipment, which has had a certain impact on the stability, safety, and economy of thermal power unit operation. Therefore, it is proposed to add an energy storage system to solve the above problems. Based on the current research status at home and abroad, a unit, steam turbine, and SOC based output control strategy model are proposed, and a two region power grid is built through Matlab/Simulink for simulation and simulation. The results indicate that under step disturbance, after coupling the 1 MW wheel energy storage system with unit 1 in region 1, the peak value drops to 1.93×10-3 pu, reduced by 4×10-4 pu, accounting for 9.39% of the original frequency fluctuation, and the actual output of the unit ranges from 2.45×10-2 pu reduced to 1.61×10-2 pu, reduced by 34%. The results indicate that under the same external disturbance conditions, using flywheel energy storage to assist in frequency regulation of thermal power units can effectively reduce system frequency fluctuations, reduce turbine output power fluctuations, and improve frequency regulation performance.
关键词
飞轮储能 /
一次调频 /
控制策略 /
火电机组 /
评价指标
Key words
flywheel energy storage /
primary frequency modulation /
control strategy /
thermal power units /
evaluation indicators
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基金
保定市科技计划（2272P008）; 国家自然科学基金（52106010）; 中央高校基本科研业务费专项资金（2022MS084）
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