带蓄电池SOC反馈的虚拟同步发电机系统

为了更好地模拟同步发电机的惯性环节并发挥不同储能单元的优势,对带有蓄电池和超级电容组成的混合储能单元的虚拟同步发电机系统进行研究,详细分析了系统的数学模型和控制策略,考虑储能元件自身的特点以及蓄电池的使用寿命,提出了含蓄电池荷电状态(state of charge,SOC)反馈的虚拟同步发电机系统控制策略。通过搭建相应的MATLAB/SIMULINK仿真模型,分析蓄电池在正常充电状态与SOC达到上限时储能的功率分配情况,验证所提出的控制策略的正确性和有效性。结果表明,所提出的带蓄电池SOC反馈控制的虚拟同步发电机系统,可在功率波动时实现功率合理分配,在维持系统的稳定性的同时延长储能的使用寿命。

Virtual Synchronous Generator System with Battery SOC Feedback Control

In order to better simulate the inertia of the synchronous generator and make full use of the advantages of different energy storage units,a virtual synchronous generator system with a hybrid energy storage unit composed of battery and ultracapacitor is studied and the mathematical model of the system is analyzed in detail.In the control strategy,taking into account the characteristics of the energy storage units themselves and the service life of the battery,a control strategy including battery SOC feedback is proposed.By setting up a corresponding MATLAB/SIMULINK simulation model,the system is analyzed in the normal state of charge and the SOC is reached.At the upper limit,the power distribution of the energy storage verified the correctness and effectiveness of the proposed control strategy.The results show that the proposed virtual synchronous generator system with battery SOC feedback control can achieve a reasonable power distribution when the power fluctuates,and prolongs the service life of the energy storage while maintaining the stability of the system.