Solar photovoltaic dispatch margins with stochastic unbalanced demand in distribution networks
Solar photovoltaic dispatch margins with stochastic unbalanced demand in distribution networks
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DOI：
10.1016/j.ijepes.2022.107976
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
M. R. Feizi;Shengfei Yin;M. Khodayar
中科院分区：
文献类型：
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作者：
M. R. Feizi;Shengfei Yin;M. Khodayar
可变光伏机组发电容量的增加给三相不平衡配电网的运行带来了新的挑战。本文提出了一个两阶段优化问题，以确定考虑配电网运行约束的光伏发电的可行调度裕度。使用列和约束生成方法来解决所提出的问题。配电网约束被表述为二阶锥体约束。该方法考虑了预测需求和最大光伏发电量的不确定性以及配电网的不平衡运行。考虑到配电网需求的最坏情况实现，对光伏发电的调度裕度进行了量化。该网络解决了储能和可调度发电资源的斜坡限制对光伏发电调度裕度的影响。光伏发电的调度裕度在修改后的 IEEE 13 总线系统中进行了量化。结果表明，强制可调度机组爬坡率将增加光伏发电的调度利润下限，而利用储能则增加了光伏发电调度利润下限和上限之间的差异。
The increase in the generation capacity of the variable photovoltaic units introduces new challenges to the operation of the unbalanced three-phase distribution networks. In this paper, a two-stage optimization problem is formulated to identify the feasible dispatch margins of photovoltaic generation considering the distribution network operation constraints. The proposed problem is solved using the column-and-constraint generation approach. The distribution network constraints are formulated as second-order cone constraints. The uncertainty in the forecasted demand and maximum photovoltaic generation as well as the unbalanced operation of the distribution network is considered in the proposed approach. The dispatch margins of photovoltaic generation are quantified considering the worst-case realization of demand in the distribution network. The impacts of energy storage and the ramping limits of the dispatchable generation resources on the dispatch margins of photovoltaic generation are addressed in this network. The dispatch margins of photovoltaic generation are quantified in the modified IEEE 13-bus system. It is shown that enforcing the ramping rates for the dispatchable units will increase the lower dispatch margins of photovoltaic generation, and leveraging energy storage increases the difference between the lower and upper photovoltaic dispatch margins.