Optimal Network Charge for Peer-to-Peer Energy Trading: A Grid Perspective

Abstract

Peer-to-peer (P2P) energy trading is a promising market scheme to accommodate the increasing distributed energy resources (DERs). However, how P2P to be integrated into the existing power systems remains to be investigated. In this paper, we apply network charge as a means for the grid operator to attribute transmission loss and ensure network constraints for empowering P2P transaction. The interaction between the grid operator and the prosumers is modeled as a Stackelberg game, which yields a bi-level optimization problem. We prove that the Stackelberg game admits an equilibrium network charge price. Besides, we propose a method to obtain the network charge price by converting the bi-level optimization into a single-level mixed-integer quadratic programming (MIQP), which can handle a reasonable scale of prosumers efficiently. Simulations on the IEEE bus systems show that the proposed optimal network charge is favorable as it can benefit both the grid operator and the prosumers for empowering the P2P market, and achieves near-optimal social welfare. Moreover, the results show that the presence of energy storage will make the prosumers more sensitive to the network charge price changes.

A Survey of ADMM Variants for Distributed Optimization: Problems, Algorithms and Features

“…The well-known alternating direction method of multipliers (ADMM) has emerged as one of the most popular tools for distributed optimization. It has found massive applications in broad areas ranging from statistical learning [5,6], multiagent reinforcement learning [7], imaging processing [8,9], data mining [10,11], power system control [12][13][14][15], smart grid operation [16][17][18][19][20][21][22], smart building management [23][24][25], multi-robot coordination [26], wireless communication control [27,28], autonomous vehicle routing [29,30] and beyond. The popularity of ADMM can be attributed to its many distinguishing advantages, such as modular structure, superior convergence, easy implementation and high flexibility.…”