Optimal Aggregation Approach for Virtual Power Plant Considering Network Reconfiguration

Abstract

As an aggregator of distributed energy resources (DERs) such as distributed generator, energy storage, and load, the virtual power plant (VPP) enables these small DERs participating in system operation. One of the critical issues is how to aggregate DERs to form VPPs appropriately. To improve the controllability and reduce the operation cost of VPP, the complementary DERs with close electrical distances should be aggregated in the same VPP. In this paper, it is formulated as an optimal network partition model for minimizing the voltage deviation inside VPPs and the fluctuation of injection power at the point of common coupling (PCC). A new convex formulation of network reconfiguration strategy is incorporated in this approach which can guarantee the components of the same VPP connected and further improve the performance of VPPs. The proposed approach is cast as an instance of mixed-integer linear programming (MILP) and can be effectively solved. Moreover, a scenario reduction method is developed to reduce the computation burden based on the k-shape algorithm. Numerical tests on the 13-bus and 70-bus distribution networks justify the effectiveness of the proposed approach.

Community Integrated Energy System Trading: A Comprehensive Review

“…Accordingly, a CIES can be regarded as a smaller version of an energy system that covers power generation, conversion, and clusters of different loads. One characteristic of CIESs is the strong emphasis on the close geography of energy production and utilization, unlike the decentralized manner of the virtual power plant in [25].…”

“…Flexible IDR resources form the trading premise of CIESs. Current modeling of IDR is greatly simplified with relatively simple classification or value constraints, which cause insufficient accuracy and calculation errors in the IDR model [25]. The IDR resources in CIESs are influenced by the types and characteristics of generators and devices, energy usage patterns, and energy coupling, and by the flexible demands of diversified consumers (pricing/incentive).…”

Optimal Network Partition and Edge Server Placement for Distributed State Estimation

“…Network partition is a basic problem in multiple distributed scenarios such as distributed optimal power flow [24], [25], distributed energy resource aggregation [26], DSE, etc. Since real time is a main concern on state estimation, researchers mostly focus on state variable balance.…”

Distributionally robust optimization for virtual power plant clusters considering carbon emission-based dynamic dispatch priority

“…Zhang et al (2021) propose a dynamic clustering algorithm that allocates energy storage systems to different virtual power plants to reduce load losses. In Wang et al (2021), network reconfiguration is considered in the aggregation approach to reduce the fluctuations of voltages and power.…”