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Power supply restoration method and system for AC/DC hybrid distribution network

A technology of AC-DC mixing and power supply recovery, which is applied in the direction of AC network circuits, power transmission AC networks, circuit devices, etc., to achieve the effects of strong robustness, convenient scheduling operation, and strong applicability

Inactive Publication Date: 2018-04-17
STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research and practice of flexible DC at home and abroad are mainly focused on the application of high-voltage, large-capacity transmission projects; while the research on the AC-DC hybrid distribution network using flexible DC devices is still in the exploratory stage

Method used

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  • Power supply restoration method and system for AC/DC hybrid distribution network
  • Power supply restoration method and system for AC/DC hybrid distribution network
  • Power supply restoration method and system for AC/DC hybrid distribution network

Examples

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Embodiment 1

[0054] This embodiment provides a power supply restoration method for an AC / DC hybrid distribution network, which includes the following steps:

[0055] 1) Pre-store various parameters of the AC-DC hybrid distribution network, establish the initial topology of the power grid in the system, and record the load of the power grid in real time during operation.

[0056] 11) Initialize, enter distribution network data, and establish corresponding databases, including insertion line database, load database and node attribute database;

[0057] Model the AC-DC hybrid distribution network, number each node (and limit the range allowed by the voltage amplitude), and pass the electrical parameters (including line impedance, maximum allowable power flow, etc.) of each line connecting each node through the computer Enter the line database.

[0058] 12) For the AC side power grid, read the data described in step 11), and establish an initial topology structure by improving the adjacency m...

Embodiment 2

[0115] This embodiment provides a power supply recovery system for an AC-DC hybrid distribution network, which includes:

[0116] Grid initial topology establishment unit: pre-store various parameters of the AC-DC hybrid distribution network, establish the initial grid topology in the distribution network system, and record the grid load in real time during operation;

[0117] Fault information collection unit: collect fault information and lock the power-off area;

[0118] Optimization problem model establishment unit: establish a power supply restoration optimization problem model;

[0119] Model solving unit: use the primal-dual interior point method to solve the power supply restoration optimization problem model;

[0120] Output unit: output power supply recovery results and control decision-making results.

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Abstract

The invention discloses a power supply restoration method and system for an AC / DC hybrid distribution network. The method comprises the steps of (1) pre-storing various parameters of the AC / DC hybriddistribution network, building an initial topological structure of the distribution network in a distribution network system and recording the load condition of the distribution network in real time during operation; (2) collecting fault information and locking a power-losing area; (3) building a power supply restoration optimization problem model; (4) solving the power supply restoration optimization problem model in the step (3) by adopting a primal-dual interior point method; and (5) outputting a power supply restoration result and a control decision content result. An easy-to-implement efficient and reliable power supply restoration method is provided for the AC / DC hybrid distribution network containing flexible DC power transmission; the optimization problem of power supply restoration is solved by adopting the widely applied primal-dual interior point method; the power supply restoration method and method can be applicable to the AC / DC hybrid distribution networks of various structures through simple correction operation; and meanwhile, vector control parameters of corresponding voltage source converters are obtained.

Description

technical field [0001] The invention relates to the field of power system operation control, in particular to a power supply recovery method based on the primal-dual interior point method for an AC-DC hybrid distribution network with flexible DC transmission. technical background [0002] Compared with the traditional AC distribution network, the AC-DC hybrid distribution network using flexible DC devices can better accommodate distributed power sources and DC loads, and alleviate the contradiction between the limited corridors of urban power grid sites and high load density. Provide dynamic reactive power support, improve system safety and stability and reduce losses. AC-DC hybrid distribution network is an important development trend of distribution network, which can effectively improve the power quality, reliability and operation efficiency of urban power distribution system. [0003] The AC-DC hybrid distribution network using flexible DC devices provides new possibili...

Claims

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Application Information

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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 周志芳张利军孙可徐晨博孙轶恺孙黎滢戴攀王坤李圆庄峥宇茅逸斐韩蓓李国杰汪可友
Owner STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHN INST
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