Optimal Dispatch of the Source-Grid-Load-Storage under a High Penetration of Photovoltaic Access to the Distribution Network

Abstract

In the context of carbon peaking and carbon neutralization, distributed photovoltaics is a relatively mature new energy power generation technology that is being widely promoted. However, the randomness and volatility of distributed generation bring severe challenges to the distribution network’s operation. Based on this, taking the typical scenario of a high proportion of distributed photovoltaic grid connections against the background of a whole-county photovoltaic system as the research object, this paper constructs a source-grid-load-storage coordination optimal scheduling model in distribution networks, considering the spatial distribution of power flow, tie-line power fluctuation, grid loss, and voltage amplitude from the perspective of optimal day-to-day scheduling. Next, the Lehmer weighted and improved multi-mutation cooperation strategy differential evolution (LW-IMCSDE) algorithm is introduced to enhance the differential evolution algorithm based on the weighted Lehmer average, improved multi-mutation cooperation, and population update strategies. The feasibility and effectiveness of the algorithm are investigated by using a test function to verify its effectiveness. Finally, the feasibility and effectiveness of the proposed strategy are verified in two typical power scenarios: summer and winter.

Integrated Planning and Operation Dispatching of Source–Grid–Load–Storage in a New Power System: A Coupled Socio–Cyber–Physical Perspective

“…Traditional power dispatching techniques struggle to adapt to the increasingly complex operational characteristics of the new power system and the diverse demands of user loads [91,92]. Therefore, it is imperative to research and implement more efficient and flexible dispatching technology to effectively allocate system resources, improve energy utilization efficiency, reduce operational costs, and enhance the system's flexibility and reliability, ultimately achieving operational optimization [93,94].…”

A Review of Voltage Control Studies on Low Voltage Distribution Networks Containing High Penetration Distributed Photovoltaics

“…Considering the two-layer nested model for distributed energy storage (DES) planning, it can effectively improve the voltage security margin and reduce the subsequent voltage management cost [10]. Zhang et al [11] propose a source-network-load-storage hierarchical coordinated optimal control strategy to cope with the distribution grid scheduling problem caused by the county-wide PV grid integration, which optimizes the energy storage measurement and the load side through the algorithm to improve the convergence speed and the economic operation efficiency of the grid. The two-tier planning model considers the energy storage system to have a better economy and be more robust.…”

Exploring Pathways toward the Development of High-Proportion Solar Photovoltaic Generation for Carbon Neutrality: The Example of China

“…Several studies have highlighted the research on the development of high-proportion solar PV generation, but these studies usually focused on the access and consumption of high-penetration solar PV generation and the optimization of the power system for high-penetration solar PV generation [24][25][26]. However, few studies have focused on the development process of high-proportion solar PV generation, although some of the literature considers the impact of the construction of highproportion solar PV generation on the achievement of the carbon neutrality goal [27,28]. More specifically, few attempts have been made to apply a unified analysis framework for exploring potential pathways to developing high-proportion solar PV generation to promote its high-quality development, considering the back force of the constraint of achieving carbon neutrality within the specified timeframe.…”