Distributed optimization tide method of radial power distribution network

Abstract

The invention discloses a distributed optimization tide method of a radial power distribution network. The method comprises the steps of connecting a photovoltaic power generation and battery energy storage device into a power distribution network in a distributed manner, constructing an optimization tide model of the power distribution network, splitting an original problem of optimization tide of the power distribution network into several subproblems by constructing an augmented Lagrangian function, solving the original problem by asynchronous iteration among the subproblems, breaking the optimization tide model into an upper layer and a lower layer, and performing distributed solving on the optimization tide problem by an alternate direction multiplier algorithm to obtain final optimaloutput and node electrovalency of distributed units. The distributed method can be realized only by exchange of upper and lower limited boundary information; and node shadow price related to internalconstraint of the power distribution network and root node electrovalency of the power distribution network are mutually independent, so that the method can serve as a coordination strategy of a power distribution system operator to a polymer in a power 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...

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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.

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