混合储能在风光互补微网中的控制策略

在风光互补发电系统组成的微网中,储能技术的应用占有重要地位,它可以进一步完善风光互补发电技术,使系统中各个部分的控制更加合理、有效,使系统更加稳定、安全,并且提高了整体使用寿命与经济性。构建了一种应用于风光互补微网中的超级电容器蓄电池混合储能系统,提出了基于功率外环加电流内环控制的VSC控制策略以及基于滑动平均滤波器的DC/DC控制策略。利用Matlab构建模拟微网并进行仿真,其验证结果表明基于上述策略的混合储能系统在微网中的应用是合理有效的,同时超级电容的高功率密度及蓄电池的高能量密度的特点的结合提高了混合储能系统的灵活性与实用性。

Control strategy of a hybrid energy storage in wind-solar hybrid generation micro-grid

The application of energy storage technology occupies an important position in micro-grid consisted of wind and solar power generation system, and ensures the stability and security of the system and the improvement of the efficiency and life span. A network of hybrid energy storage system is built, and a control strategy of VSC based on current inner loop and power control outer loop and a control strategy of DC / DC based on slip average filter are proposed. An analogy micro-grid by Matlab is built and verified, the result shows that the application is reasonable and effective. At the same time, the combination of the advantage of storage battery in high energy density with that of super capacitor in high power density can improve the flexibility and widen the application fields of the whole system.