This study proposes a combined hybrid energy storage system(HESS) and transmission grid(TG) model, and a corresponding time series operation simulation(TSOS) model is established to relieve the peak-shaving pressure o...This study proposes a combined hybrid energy storage system(HESS) and transmission grid(TG) model, and a corresponding time series operation simulation(TSOS) model is established to relieve the peak-shaving pressure of power systems under the integration of renewable energy. First, a linear model for the optimal operation of the HESS is established, which considers the different power-efficiency characteristics of the pumped storage system, electrochemical storage system, and a new type of liquid compressed air energy storage. Second, a TSOS simulation model for peak shaving is built to maximize the power entering the grid from the wind farms and HESS. Based on the proposed model, this study considers the transmission capacity of a TG. By adding the power-flow constraints of the TG, a TSOS-based HESS and TG combination model for peak shaving is established. Finally, the improved IEEE-39 and IEEE-118 bus systems were considered as examples to verify the effectiveness and feasibility of the proposed model.展开更多
针对抽蓄与火电机组联合调峰同步调用(synchronous dispatching of pumped storage-thermal,SDPT)、抽蓄定时抽发调用(timing dispatching of pumped storage-thermal,TDPT)顺序及策略所存在的问题,统筹抽蓄的调用效益和火电深度调峰经...针对抽蓄与火电机组联合调峰同步调用(synchronous dispatching of pumped storage-thermal,SDPT)、抽蓄定时抽发调用(timing dispatching of pumped storage-thermal,TDPT)顺序及策略所存在的问题,统筹抽蓄的调用效益和火电深度调峰经济性,提出了抽蓄-火电分层调用顺序及策略,建立了抽蓄-火电联合调峰分层优化调度模型(hierarchical optimal dispatching of combined peak-shaving of pumped storage-thermal,HDPT)。其中上层模型以改善净负荷峰谷波动性最优和抽蓄的调用效益最大为目标优化抽蓄机组出力;下层模型计及火电深调成本和弃风惩罚成本,以系统总调峰成本最小为目标优化火电机组出力。最后以某实际区域系统为例,仿真对比了TDPT、SDPT、HDPT 3种方案,得出所提方案可大幅改善系统调峰经济性和火电调峰经济性,减小弃风率,并大幅提高抽蓄机组利用率。研究结果可为抽蓄调度决策提供参考。展开更多
基金supported by the State Grid Science and Technology Project (No.52999821N004)。
文摘This study proposes a combined hybrid energy storage system(HESS) and transmission grid(TG) model, and a corresponding time series operation simulation(TSOS) model is established to relieve the peak-shaving pressure of power systems under the integration of renewable energy. First, a linear model for the optimal operation of the HESS is established, which considers the different power-efficiency characteristics of the pumped storage system, electrochemical storage system, and a new type of liquid compressed air energy storage. Second, a TSOS simulation model for peak shaving is built to maximize the power entering the grid from the wind farms and HESS. Based on the proposed model, this study considers the transmission capacity of a TG. By adding the power-flow constraints of the TG, a TSOS-based HESS and TG combination model for peak shaving is established. Finally, the improved IEEE-39 and IEEE-118 bus systems were considered as examples to verify the effectiveness and feasibility of the proposed model.
文摘针对抽蓄与火电机组联合调峰同步调用(synchronous dispatching of pumped storage-thermal,SDPT)、抽蓄定时抽发调用(timing dispatching of pumped storage-thermal,TDPT)顺序及策略所存在的问题,统筹抽蓄的调用效益和火电深度调峰经济性,提出了抽蓄-火电分层调用顺序及策略,建立了抽蓄-火电联合调峰分层优化调度模型(hierarchical optimal dispatching of combined peak-shaving of pumped storage-thermal,HDPT)。其中上层模型以改善净负荷峰谷波动性最优和抽蓄的调用效益最大为目标优化抽蓄机组出力;下层模型计及火电深调成本和弃风惩罚成本,以系统总调峰成本最小为目标优化火电机组出力。最后以某实际区域系统为例,仿真对比了TDPT、SDPT、HDPT 3种方案,得出所提方案可大幅改善系统调峰经济性和火电调峰经济性,减小弃风率,并大幅提高抽蓄机组利用率。研究结果可为抽蓄调度决策提供参考。
