电器与能效管理技术 ›› 2022, Vol. 0 ›› Issue (5): 47-54.doi: 10.16628/j.cnki.2095-8188.2022.05.008

• 储能技术 • 上一篇    下一篇

计及储能损耗和功率预测误差的风光储微电网功率平抑策略

张茂林1, 肖辉1, 曾林俊2, 赵文钦1, 王俊1   

  1. 1.长沙理工大学 电气与信息工程学院, 湖南 长沙 410114
    2.湖南大学 电气与信息工程学院, 湖南 长沙 410082
  • 收稿日期:2022-02-08 出版日期:2022-05-30 发布日期:2022-07-01
  • 作者简介:张茂林(1998—),男,硕士研究生,研究方向为微电网的优化调度与配置。|肖 辉(1975—),女,教授,研究方向为电力系统优化运行、微电网的优化调度。|曾林俊(1993—),男,博士研究生,研究方向为电力系统源网荷储协同互动、优化调度。
  • 基金资助:
    国家自然科学基金资助项目(52007009);湖南省教育厅重点资助项目(18A120)

Power Smoothing Strategy for Wind PV Energy Storage Microgrid Considering Energy Storage Losses and Power Prediction Errors

ZHANG Maolin1, XIAO Hui1, ZENG Linjun2, ZHAO Wenqin1, WANG Jun1   

  1. 1. College of Electrical and Information Engineering,Changsha University of Science and Technology, Changsha 410114, China
    2. College of Electrical and Information Engineering,Hunan University, Changsha 410082, China
  • Received:2022-02-08 Online:2022-05-30 Published:2022-07-01

摘要:

在含有风力、光伏、居民负荷、蓄电池、超级电容和电动汽车的微电网中,为平抑微电网并网功率波动,提出一种计及储能损耗和功率预测误差的功率平抑策略。首先对并网功率的日前预测数据进行小波包分解,用蓄电池和超级电容平抑功率波动,并建立优化调控模型,优化蓄电池和超级电容出力;然后针对功率的日前预测数据的误差,建立基于模型预测控制的滚动优化调度模型,通过调整电动汽车有序充放电消除误差。最后构建实际微电网仿真模型,运行结果符合预期,表明所提方法能有效减少储能的过充、过放,提升并网功率追踪调度计划的能力。

关键词: 微电网, 优化调控, 蓄电池和超级电容, 模型预测控制

Abstract:

In a microgrid containing wind power,photovoltaic power,residential load,battery,supercapacitor and electric vehicles,a power smoothing strategy considering the energy storage loss and power prediction error is proposed to smoothen the grid-connected power fluctuation.Firstly,the day-ahead prediction data of grid-connected power were decomposed by wavelet packet,and the power fluctuation was smoothed by battery and ultracapacitor.The optimal regulation model was established to optimize the output of battery and ultracapacitor.Then,a rolling optimization scheduling model based on the model predictive control was established for the error of power day-ahead prediction data,and the error was eliminated by adjusting the orderly charging and discharging of electric vehicles.Finally,a real microgrid simulation model was constructed.The operation results meet the expectations,which shows that the proposed method can effectively reduce the over-charge and over-discharge of energy storage,and improve the ability of the grid-connected power tracking scheduling.

Key words: micro power grid, optimized regulation, battery and supercapacitor, model predictive control

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