Ex-post real-time distribution LMP based on state estimation
Ex-post real-time distribution LMP based on state estimation
复制标题
基于状态估计的事后实时分配LMP
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Qingzhen Liu
中科院分区：
文献类型：
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作者：
Yikui Liu;Jie Li;Lei Wu;Qingzhen Liu
随着分布式能源（DER）集成和需求响应能力的增加，现代配电系统预计将经历一个放松管制的过程，就像输电系统中正在发生的事情一样。本文提出了一种事后实时配电系统位置边际电价（DLMP），它是一种有效的经济信号，能够反映配电系统不同接入点的增量负荷供应的边际成本，同时考虑了配电网用户和居民用户的实际实时行为。DLMP是为每个总线上的每个相位定义的。在配电系统状态估计器提供的当前系统运行点处，通过线性化基于节点电流注入的系统状态方程，建立增量线性优化问题。增量线性优化问题的目标是最大化增量配电系统的社会福利，同时受到一组增量系统状态方程，功率平衡方程和灵活的发电/负荷的调整限制。通过增量线性优化问题的最优对偶解计算事后实时DLMP。采用一个改进的IEEE 13节点配电系统来评估所提出的模型的性能。
The modern distribution system with proliferated distributed energy resources (DERs) integration and increased demand response capacities is expecting to experience a deregulation process just as what is happening in the transmission system. Ex-post real-time distribution system locational marginal pricing (DLMP) is proposed in this paper as an effective economic signal to reflect the marginal cost of supplying incremental loads in different connecting points of the distribution system while considering actual real-time behaviors of DERs and residential consumers. DLMP is defined for each phase at each bus. An incremental linear optimization problem is built by linearizing nodal current injection-based system state equations at the current system operation point, which is provided by the distribution system state estimator. The objective of the incremental linear optimization problem is to maximize the incremental distribution system social welfare, while constrained by a set of incremental system state equations, power balance equations, and adjustment limits of flexible generations/loads. Ex-post real-time DLMPs are calculated via the optimal dual solutions of the incremental linear optimization problem. A modified IEEE 13-bus distribution system is adopted to evaluate the performance of the proposed model.