A distributed optimization method for power flow in radial distribution network

Abstract

The invention discloses a distributed optimization power flow method for a radial distribution network, which includes: connecting photovoltaic power generation and battery energy storage devices to the distribution network in a distributed manner, and constructing an optimal power flow model of the distribution network; Construct the augmented Lagrangian function, split the original problem of distribution network optimization power flow into several sub-problems, and solve the original problem by asynchronous iteration between sub-problems; decompose the optimal power flow model into upper and lower layers, and adopt The alternating direction multiplier algorithm realizes the distributed solution to the optimal power flow problem, and obtains the final optimal output of each distributed unit and the electricity price of each node. The distributed method designed in the present invention can be realized only by the exchange of limited boundary information between the upper and lower layers, and the node shadow price related to the internal constraints of the distribution network is independent from the power price of the root node of the distribution network. Coordination Strategies of Distribution System Operators to Aggregators in an Electricity Market Environment.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a distributed optimization power flow method for a radial distribution network used for the regulation and control of a distribution network containing distributed power sources. Background technique [0002] At present, a large amount of renewable energy power generation is integrated into the distribution network in a distributed manner, which makes the traditional power distribution network gradually show the characteristics of active power, and increases the difficulty of power balance and voltage support regulation. In addition, small power sources are often incorporated into the distribution network in a distributed manner. At the same time, the potential of users themselves to participate in active regulation has gradually been valued. Therefore, through reasonable regulation of active quantities distributed in the distribution network, effective Alleviate or solve th...

AI Technical Summary

Problems solved by technology

Although this method realizes the distributed calculation formula of the distribution network optimization power flow, it handles the voltage problem in the distribution network too simply, and does not involve the detailed modeling of the power distribution unit or aggregate, which has certain limitations.

Images