一种新型双电池风力发电储能系统及控制策略

A NOVEL DUAL-BATTERY ENERGY STORAGE SYSTEM AND CONTROL STRATEGY FOR WIND POWER APPLICATION

提出一种新型双电池风电储能系统,它能以较低的运行成本将风电功率波动维持在规定的范围内;风电场可在每个调度时段内输出恒定功率,使风电稳定地并入电网。当调度功率低于实际风电功率时,起充电作用的电池处于工作状态,当调度功率高于实际风电功率时,起放电作用的电池处于工作状态;当其中一个电池充满电或深度放电时,2组电池的充、放电状态切换。为了延长电池使用寿命,对调度功率进行优化,以确保2组电池都在完整充、放电循环下运行,此双电池储能系统可显著降低系统运行成本。利用一台具有真实风电功率数据的3 MW风电机组进行仿真分析,验证了所提系统及控制策略的有效性。

A new dual-battery wind energy storage system is proposed,which can maintain the fluctuation of wind power within a specified range at a lower operating cost. Wind farms can output constant power in each dispatching period,so that wind power can be stably integrated into the grid. When the dispatching power is lower than the actual wind power,the batteries with charging function are in working state,and when the dispatching power is higher than the actual wind power,the batteries with discharging function are in working state,when one of the batteries is full or deep discharging,the charging and discharging states of the two batteries are switched.To prolong the service life of batteries,the dispatching power is optimized to ensure that both batteries operate under complete charging and discharging cycles. This dual-battery energy storage system can significantly reduce the operating cost of the system. A 3 MW wind turbine with real wind power data is simulated and analyzed,and the effectiveness of the proposed system and control strategy is verified.