风光发电系统中模拟电机特性的储能优化控制

Energy Storage Optimization Control for Simulating Motor Characteristics in Wind-solar Generation System

储能控制技术是微电网发展的核心之一,在出力稳定性不足的光伏和风力发电中,优化储能的控制策略可以提升系统平滑功率波动的能力。针对风光发电微电网中电力接口缺少惯性缓冲,在系统受到扰动时,容易产生较大的响应冲击,研究了将旋转电机的惯性和阻尼特性引入储能的控制中,使储能具备旋转电机的鲁棒性,增强了系统抵抗干扰的能力。提出了根据蓄电池荷电状态进行负荷所需功率分配控制蓄电池充放电的优化控制策略,避免了蓄电池的过充过放,延长了蓄电池的使用寿命。通过小信号分析和 Matlab/Simulink 仿真,验证了控制策略能够优化储能性能,提升系统运行的可靠性。

Energy storage control technology is one of the development cores of the micro-grid. In the photovoltaic and wind power generation with insufficient stability,the optimal control strategy of energy storage can enhance the ability of smooth power fluctuation of the system. In view of lacking inertial buffer of power interface in the wind-solar micro-grid and big response shock in case fluctuation of the system,it is studied to introduce the inertial and damping characteristics of rotating motor into the control of energy storage,so to keep the energy storage possess the robustness of rotating motor and increase interference resistance ability of the system. The optimal control strategy for control ling the charge and discharge of the battery is proposed for the needed power distribution in accordance with battery charge status,so to void the excess charge and discharge of the battery and extend service life of the battery. The ability of the control strategy to optimize the energy storage performance and improve reliability of system operation is verified by the small signal analysis and system simulation.