Novel partitioning method suitable for distributed voltage control of power distribution network

A voltage control model and voltage control technology, applied in AC network voltage adjustment, constraint-based CAD, photovoltaic power generation, etc.

Pending Publication Date: 2020-12-25
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the computational efficiency of the ADMM algorithm is closely related to the selection of the penalty factor, and the convergence speed of the APP algorithm is also sensitive to the selection of auxiliary function parameters

Method used

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  • Novel partitioning method suitable for distributed voltage control of power distribution network
  • Novel partitioning method suitable for distributed voltage control of power distribution network
  • Novel partitioning method suitable for distributed voltage control of power distribution network

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Embodiment 1

[0071] A new partition method suitable for distributed voltage control of distribution network, including the following steps:

[0072] Step 1: Through the power flow constraints of the second-order cone relaxation, establish the voltage control model of the active distribution network aiming at the minimum total network loss and the minimum node voltage amplitude deviation in the distribution network area to be studied, and perform step 2;

[0073] Step 2: By establishing a modular function of electrical distance, a network partition method is established for the distributed control of the active distribution network, and the regional total network system of the distribution network is divided into multiple sub-regions through the network partition method, where each partition Quantify the computational complexity function by the number of decision variables and constraints in the subsequent sub-regions, perform step 3,;

[0074] Step 3: Combine the partition method between t...

Embodiment 2

[0114] A new partitioning method suitable for distribution network distributed voltage control, a voltage control model of an active distribution network, in the present invention, the objective function is to minimize network loss and bus voltage deviation, namely:

[0115]

[0116]

[0117]

[0118]

[0119]

[0120]

[0121]

[0122] where F refers to the objective function of the model, T is the total time period, Indicates the total network loss in the time period t, and ij indicates the direction of positive power flow from node i to node j. E is a set of lines, and B is a set of nodes. r ij Indicates the resistance of branch ij, I ij，t Indicates the current of branch ij in time period t, V i，t Indicates the voltage value at node i. The above power flow constraint (2) is usually used in branch power flow models. After using the second-order cone relaxation technique, the expression (2d) is formed, and represent the square of the branch curre...

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Abstract

The invention relates to the technical field of power distribution networks, and aims to provide a novel partitioning method suitable for distributed voltage control of a power distribution network. Avoltage control model of an active power distribution network taking minimum total network loss and minimum node voltage amplitude deviation of a to-be-researched power distribution network region astargets is established. A network partitioning method is established for active power distribution network distributed control. A total network system of the power distribution network region is divided into a plurality of sub-regions, and decision variables in the sub-regions and the number of constraints in the sub-regions are used to quantitatively calculate a complexity function. According tothe partitioning method between every two adjacent sub-regions, an auxiliary power generation source is added to each sub-region of the boundary in a boundary bus, and a distributed coordination model is established. The distributed coordination model is solved based on a Lagrange dual relaxation distributed solving method. According to local information exchange between the boundary sub-regions,the boundary variables are coordinated and updated to obtain an optimal decision result of the to-be-researched power distribution network to limit the output of the power of a photovoltaic unit anda wind turbine generator.

Description

technical field [0001] The invention relates to the technical field of distributed power distribution, in particular to a novel partitioning method suitable for distributed voltage control of distribution networks. Background technique [0002] In recent years, with the continuous development of distributed power sources such as Wind Turbine Generation (WTG) and Photovoltaic Generation (PVG), the structure of active distribution networks has become more and more complex. The high permeability of distributed generation (Distributed Generations, DGs) will have a great negative impact on the voltage, how to effectively coordinate DGs to control the voltage has become an important problem to be solved in the active distribution network. In addition, centralized optimization methods are widely used in voltage control, but they often encounter large bottlenecks in the calculation of large-scale actual distribution networks. Therefore, distributed voltage control becomes a promisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/06H02J3/18H02J3/12H02J3/38H02J3/28G06Q50/06G06F30/23G06F113/04G06F111/04
CPCH02J3/466H02J3/06H02J3/18H02J3/12H02J3/381H02J3/28G06Q50/06G06F30/23H02J2203/10H02J2203/20H02J2300/24H02J2300/28H02J2300/40G06F2113/04G06F2111/04Y02E10/56Y02E10/76Y02E40/30Y02E70/30
Inventor 高红均阮贺彬刘俊勇刘友波向月
Owner SICHUAN UNIV
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