Central energy management method for photovoltaic DC micro-grid system based on power tracking control
Central energy management method for photovoltaic DC micro-grid system based on power tracking control
复制标题
基于功率跟踪控制的光伏直流微电网系统集中能量管理方法
DOI：
10.1049/iet-rpg.2016.0351
复制
发表时间：
2017
影响因子：
2.6
通讯作者：
Ma WeiZhong
中科院分区：
文献类型：
--
作者：
Han Yang;Xie XiaoGao;Deng Hao;Ma WeiZhong
为了降低可再生能源的高渗透率对公用电网的冲击，抑制微网功率波动对电能质量的影响，研究了一种直流微网功率跟踪控制策略。在此基础上，设计了一种基于该控制策略的集中式能量管理方法。以包含可再生能源和混合储能单元的直流微电网为例，根据分布式电源及其控制系统模型，建立了完整的控制系统模型。基于频域法对功率跟踪控制策略进行了分析和设计。采用所设计的控制策略，系统可以吸收不同频率范围内的负载功率波动，实现混合储能单元的协调运行。此外，基于CEMM，控制系统以在并网模式下从公用电网吸收预定量的电力/向公用电网输送预定量的电力。通过这种方式，实现了不同模式之间的平滑切换和微电网的稳定运行。最后，通过仿真直流微网系统验证了系统的功能。
To reduce the impact of high penetration of renewable energy on the utility grid and suppress the influence of micro‐grid power fluctuation on power quality, a power tracking control strategy for DC micro‐grid has been studied. Furthermore, a central energy management method (CEMM) based on this control strategy has been designed. The DC micro‐grid, which contains renewable energy and hybrid energy storage unit, is used to build a complete control system model according to the distributed power supply and its control system model. The power tracking control strategy has been analysed and designed based on frequency domain method. With the designed control strategy, the system can realise coordinated operation of the hybrid energy storage unit by absorbing the load power fluctuation within different frequency range. Furthermore, based on the CEMM, the system is controlled to absorb/deliver predefined amount of power from/to the utility grid under grid‐connected mode. In this way, smooth switching between different modes and the stable operation of the micro‐grid are realised. Finally, the function of the system is verified with an emulated DC micro‐grid system.