考虑可变能力曲线的BESS并行一次频率和本地电压控制的最佳提供：建模和实验评估
Optimal Provision of Concurrent Primary Frequency and Local Voltage Control from a BESS Considering Variable Capability Curves: Modelling and Experimental Assessment
摘要：
提出了一种蓄电池储能系统（BESS）的控制方法，以同时提供主频率和局部电压调节服务。实时操作中的最佳操作点计算过程共同考虑转换器的实际可变有功和无功功率容量以及BESS的荷电状态。控制器优化电网服务的提供，考虑测量的电网和电池状态，并使用三时间常数模型（TTC）预测电池直流电压作为电流轨迹的函数。提出了一种计算效率高的算法来解决制定的最优控制问题。实验测试验证了所提出的概念，并显示了商业实用规模的720 kVA/560 kWh BESS的有效性所采用的控制框架。
英文摘要：
This paper proposes a control method for battery energy storage systems (BESSs) to provide concurrent primary frequency and local voltage regulation services. The actual variable active and reactive power capability of the converter, along with the state-of-charge of the BESS, are jointly considered by the optimal operating point calculation process within the real-time operation. The controller optimizes the provision of grid services, considering the measured grid and battery statuses and predicting the battery DC voltage as a function of the current trajectory using a three-time-constant model (TTC). A computationally-efficient algorithm is proposed to solve the formulated optimal control problem. Experimental tests validate the proposed concepts and show the effectiveness of the employed control framework on a commercial utility-scale 720 kVA/560 kWh BESS.
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