DLMP-Based Quantification and Analysis Method of Operational Flexibility in Flexible Distribution Networks

Abstract

With high penetration of flexible resources, operational flexibility of flexible distribution networks (FDNs) is important to ensure high-quality electricity services. This paper proposes a value quantification and analysis method for operational flexibility in FDNs based on distribution locational marginal pricing (DLMP). First, flexibility constraints are formulated from the perspective of node integration, branch transfer, and network aggregation of flexibility. Then, a unified analytical framework for quantifying the operational flexibility is established, in which spatial-temporal transfer of flexibility is modeled with the derivation of flexibility sensitivity factors. Further, a DLMP-based flexibility value quantification model is proposed with nodal net power as the unit for flexibility pricing. The obtained flexibility price can not only quantify flexibility value but also be used to guide the flexible resources. Finally, the effectiveness of the proposed method is validated on a modified IEEE 33-node distribution system and a modified IEEE 123-node distribution system. Results verify that the proposed method can quantify the impact of nodal net power on operational flexibility and effectively improve the overall flexibility performance through the guide of flexibility price.

Enhancing flexibility evaluation in AC/DC distribution systems for sustainable energy integration

“…where P trs EV,j,i (t) and P dis EV,j,i (t) are the active power of the ith EV in the jth EV parking lot being shifted and discharged (Jian et al, 2022) at time t, respectively. P tot EV,j (t) is the total charging power of EVs in EV parking lot j at time t.…”

Editorial: Edge computation and digital distribution networks

“…DDNs is the digitalized appearance of the physical distribution network, in which ubiquitous connections and massive data are the basic characteristics (Huo et al, 2022). It is an important task to utilize the massive data and propose novel operation modes to construct more efficient and intelligent distribution networks (Jian et al, 2022). Among the advanced digital technologies in DDNs, edge computing has received wide attention (Zhao et al, 2022).…”

Optimal Cluster Scheduling of Active–Reactive Power for Distribution Network Considering Aggregated Flexibility of Heterogeneous Building-Integrated DERs

“…Integration and quantification for the regulation capacity of flexible resources are regarded as effective means to take advantage of the flexibility of smart-building systems [4,[14][15][16][17][18]. Several important investigations have been reported on the virtual battery model [14], virtual synchronous machine model [15], flexible supply-and-demand balance model [16], and node power model [17] for the aggregation of flexible resources. A generic and scalable approach considering zonotopic sets for flexible energy systems was studied in [18] to describe their flexibility quantitatively.…”

“…The authors studied a virtual power plant aggregation and operation mechanism to effectively guarantee the stability of the aggregation results [14]. An adaptive and robust optimization algorithm was adopted to accurately quantify the maximum power support range of the heat grid to the power grid [17]. After the aggregation of the flexible resources, the coordination and optimization of the distribution network with cluster division based on the flexible resources in the smart-building system can be achieved.…”