规模化储能分区聚合有功调度控制技术研究

随着规模化储能电站的集中建设和投运,储能以其快速、精准的功率控制特性,可有效改善系统的动态调节性能。针对规模化储能电站所接入的电网分区,文中从电力和电量两个维度,分析储能电站集群的聚合充放电能力并提出了聚合分析算法,为调度主站端的储能电站集群的快速功率控制、短时削峰或填谷、负荷趋势跟踪提供辅助决策依据。首先,根据当前电网分区在发用电平衡和输变电潮流控制中的调度控制需求,总结和归纳了储能分区聚合的控制目标;其次,提出了储能电站参与电网分区控制的分配策略,即通过状态转换、考虑荷电状态均衡的功率调整依次计算调用容量,实现满足分区控制目标的闭环滚动跟踪;最后,通过算例验证该策略能充分发挥储能资源的规模聚合特性,支撑调度机构解决电网分区运行控制难题。

Large-scale energy storage aggregation active power dispatching and control in subarea division of power grid

With large-scale energy storage stations constructed and being in operation, energy storage source effectively promotes power system dynamic regulating performance for its fast and high precision power control characteristics. Firstly, charging and discharging ability of energy storage stations aggregation is analyzed and the aggregation analysis algorithm of subarea division of power grid is proposed. The analysis results provide ancillary decision-marking proposals in fast power control, peak shifting in short time and load trend following. Secondly, it summarizes the control objectives of energy storage stations aggregation according to requirements of active power balance and power flow control for transmission and transformation in subarea division of power grid. It proposes dispatching strategy which includes charging and discharging state convert and power regulation on the basis of state of charge (SOC) for storage stations in equilibrium to calculate regulating volume in order to satisfy the control objectives in close loop. Finally, a case proves that it develops the aggregation and scale advantage of energy storage source, and thus solves problems in dispatching and control for subarea division of power grid.