• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2019, Vol. 40 ›› Issue (10): 75-83.doi: 10.3969/j.issn.1000-7229.2019.10.011

• 智能电网 • 上一篇    下一篇

孤岛模式下互联微电网的自适应同步频率控制

钟永洁,翟苏巍,孙永辉   

  1. 河海大学能源与电气学院,南京市 210098
  • 出版日期:2019-10-01
  • 作者简介:钟永洁(1990),男,硕士研究生,主要研究方向为微电网控制及优化、综合能源系统建模及优化等; 翟苏巍(1991),男,博士研究生,主要研究方向为微电网、含可再生能源的电力系统建模与优化调控等; 孙永辉(1980),男,教授,博士生导师,通信作者,主要研究方向为电力系统分析与控制、负荷预测、综合能源系统等。
  • 基金资助:
    国家自然科学基金项目(61673161);江苏省自然科学基金项目(BK20161510)

Adaptive Synchronization Frequency Control for Interconnected Micro-grids in Island Mode

ZHONG Yongjie,ZHAI Suwei,SUN Yonghui   

  1. College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China
  • Online:2019-10-01
  • Supported by:
    This work is supported by National Natural Science Foundation of China(No. 61673161)and Natural Science Foundation of Jiangsu Province(No. BK20161510).

摘要: 文章在负荷频率控制(load frequency control,LFC)相关技术基础上,针对孤岛模式下互联微电网(micro-grids,MG)组成的电力系统,提出新的广义动态LFC模型、鲁棒分散式LFC控制策略。首先,描述单区域、多区域控制系统的LFC机制,将经典的LFC方法应用于运行场景多变、孤岛模式下互联MG组成的电力系统中。然后,针对孤岛模式下互联MG组成的电力系统,提出一种基于一致性协同控制策略的LFC算法,该算法通过控制调速器-涡轮的输入及管理储能系统(energy storage systems,ESS)向MG中注入或吸收的功率量,实现孤岛MG的自适应同步频率控制。其次,阐明饱和约束下的ESS可以有效地减轻小惯性和小阻尼在MG中引起的不稳定现象。最后通过搭建孤岛模式下6个互联MG组成的电力系统仿真模型验证该算法的正确性与有效性,所得到的控制器能够使干扰的影响最小化并保持鲁棒的性能。

关键词: 自适应同步, 微电网(MG), 频率, 负荷频率控制(LFC), 储能系统(ESS)

Abstract:  On the basis of load frequency control (LFC) related technology, a new generalized dynamic LFC model and a robust decentralized LFC control strategy are proposed in this paper for the power system composed of interconnected micro-grids (MGs) in island mode. Firstly, the LFC mechanisms of a single area and multi-area control system are described, and the classical LFC scheme is applied to power system with changeable scene and interconnected MGs in island mode. Secondly, for a power system with six interconnected MGs in island mode, a kind of coordinated control strategy is proposed on the basis of consistency of LFC algorithm, where by controlling the turbine governor input and managing the amount of energy that energy storage systems (ESS) have to absorb/inject from/into MGs, a new adaptive synchronization frequency control method for islanding MGs is proposed. Then, it is illustrated that ESS under saturation constraint can reduce the instability caused by small inertia and small damping in MGs. Finally, the correctness and effectiveness of the proposed algorithm are verified by the simulation results with the power system including six interconnected MGs, which shows that the proposed controller can minimize the impact of interference and maintain robust performance of the interconnected MGs in island mode.

Key words: adaptive synchronization, micro-grids (MG), frequency, load frequency control (LFC), energy storage systems (ESS)

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