当前城市电网容量增长空间有限,清洁能源渗透的随机性及负荷分布的不均衡性,导致城市电网输电阻塞频繁发生;110kV高压配电网检修及运行方式调整受限其灵活调节能力,转供时序操作难以保证系统可靠安全供电。相较于中低压配电网,高压配电网拓扑重构具备广域时间尺度上的大范围潮流转移能力,协同储能电站灵活的充放电特性,可有效解决上述问题。因此提出基于模型预测控制方法,将转供0-1离散控制与储能荷电状态(state of charge,SOC)连续调节相结合,构建高压配电网转供与储能电站协同控制的日前-日内优化模型;日前计划为日内调度提供参考;日内调度采用滚动优化校正方式,精细化调控储能电站出力以降低转供时序操作风险。算例结果表明,所提模型可充分挖掘2种调控方式不同时间尺度的调控潜力,达到消除阻塞、降低避峰切负荷风险,提高能源消纳水平的目的;同时结合提前预防、分步转供的操作原则,在保证运行低风险的同时指导高压配电网检修及运行方式调整。
The callus is initiated in three media (B5,MS,White) from the buds,leaves and stem segments of Buddleja officinalis.The results shows that the inducing frequencies of tender leaves of buddleja offcinalis on media are as high as 100%.No significant differences between tender leaves and buds is observed,as to the frequency.The frequency was decreased as the leaf became older.The medium with 6-BA 0.5mg/L and NAA 1.0mg/L is selected as the best medium for callus culture.However,B5 is more suitable for calli and cells to grow and divide than MS and white.The growth rate of leaves is faster than buds and stem segments.The Medium with 6-BA 0.5mg/L and NAA 1.0mg/L is applicable to increase the cell growth.
