光储柴独立微电网中的虚拟同步发电机控制策略

发布时间：2018-06-02 22:40

  本文选题：柴油发电机组 + 独立微网　； 参考：《电工技术学报》2017年23期

【摘要】：针对由可再生能源发电系统、常规柴油发电机组(DGS)和蓄电池储能系统组成的独立微网,提出一种适合微网在孤岛模式下稳定运行的虚拟同步发电机(VSG)控制策略。首先,建立DGS在同步旋转坐标系下的数学模型,并分析其输出电压和转速的阶跃响应特性;其次,在充分考虑DGS和VSG不同控制特性的基础上,提出一种适应独立微网分层协调控制的改进型VSG策略;然后,在基本VSG控制器中增加虚拟阻抗环节,灵活实现对微网谐波的抑制;最后,建立一套包含2台100 k V·A VSG及1台440 k W DGS并联的独立微网实验平台,实验结果验证了所述控制策略的正确性与有效性。
[Abstract]:Aiming at the independent microgrid composed of renewable energy generation system, conventional diesel generator unit DGSand battery energy storage system, a virtual synchronous generator (VSGG) control strategy suitable for the stable operation of microgrid in isolated island mode is proposed. Firstly, the mathematical model of DGS in synchronous rotating coordinate system is established, and the step response characteristics of its output voltage and rotational speed are analyzed. Secondly, on the basis of fully considering the different control characteristics of DGS and VSG, This paper proposes an improved VSG strategy for independent microgrid hierarchical coordination control. Then, virtual impedance is added to the basic VSG controller, and the harmonic suppression of microgrid is realized flexibly. Finally, A set of independent microgrid experiment platform including 2 parallel k V A VSG and 1 440 k W DGS parallel is established. The experimental results show that the proposed control strategy is correct and effective.
【作者单位】： 合肥工业大学电气与自动化工程学院;阳光电源股份有限公司;
【基金】：国家高技术研究发展计划(863计划)(2015AA050607) 国家重点研发计划(2016YFB0900300)资助项目
【分类号】：TM31
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本文编号：1970459