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Distributed optimization tide method of radial power distribution network

A method of power flow, technology for distribution networks, applied in the field of electrical engineering

Active Publication Date: 2018-01-05
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Abstract
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  • Application Information

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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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  • Distributed optimization tide method of radial power distribution network
  • Distributed optimization tide method of radial power distribution network
  • Distributed optimization tide method of radial power distribution network

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Embodiment Construction

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0054] The invention discloses a distributed optimization power flow method for a radial distribution network, comprising the following steps:

[0055] (1) For the radial topology of the distribution network, photovoltaic power generation and battery energy storage devices are connected to the distribution network in a distributed manner;

[0056] For the photovoltaic power generation unit connected to node i, ignoring its operating cost, the photovoltaic power generation unit model connected to node i can be expressed as:

[0057] The apparent power of the photovoltaic power generation unit during the t period is equal to the sum of the actual active power and the reactive output of the photovoltaic power generation unit during the t period;

[0058] Moreover, the sum of the squares of the actual active power and reactive output of the photovoltaic powe...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/06
Inventor 李文博朱星旭蒋佳音杨思孙东磊蒋哲陈博麻常辉张磊张冰赵康滕国钧
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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