摘要
风电等可再生能源大规模并网,其间歇性和波动性的出力特性会给电网带来机组调频容量不充足、调频效果不理想等调频问题。为此,文中提出一种大规模储能参与电网调频的双层控制策略。首先,基于复频域分析提出区域调节需求信号分配模式和区域控制误差信号分配模式的切换时机判据。然后,全面考虑不同调频电源的技术特征,提出大规模电池储能和火电机组协调响应系统自动发电控制指令的双层控制策略,在上层基于电源调频成本函数实现多约束条件下的功率经济分配,在下层基于模型预测控制实现频率分布式优化控制。最后,通过仿真验证了文中所提策略的经济性和有效性。
When large-scale renewable energy such as wind power is integrated into power grid,the intermittency and fluctuation of its output characteristics bring problems such as insufficient frequency regulation capacity and unsatisfactory frequency regulation performance to power grid.Therefore,a bi-level control strategy for power grid frequency regulation with participation of largescale energy storage is proposed.Firstly,a criterion for switching between area regulation requirement and area control error allocation modes is proposed based on the analysis in the complex frequency domain.Secondly,considering technical characteristics of different frequency regulation power sources comprehensively,a bi-level control strategy is proposed for the coordinated response to automatic generation control instructions with large-scale battery energy storage and thermal power generation units.In the upper layer,the economic distribution of power is realized based on the frequency regulation cost function of power sources.In the lower layer,distributed optimal control of frequency is realized based on model predictive control.Finally,the economics and effectiveness of the proposed strategy are verified by simulation.
作者
张舒鹏
董树锋
徐成司
韩荣杰
寿挺
李建斌
ZHANG Shupeng;DONG Shufeng;XU Chengsi;HAN Rongjie;SHOU Ting;LI Jianbin(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Hangzhou Xiaoshan Power Supply Company of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 311200,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2020年第19期55-62,共8页
Automation of Electric Power Systems
基金
国家重点研发计划资助项目(2016YFB0901300)。
关键词
大规模储能
调频
分配模式
成本函数
模型预测控制
large-scale energy storage
frequency regulation
allocation mode
cost function
model predictive control
