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Planning method for DC upgrade and reconstruction of multi-stage AC/DC hybrid power distribution network

An AC-DC hybrid connection and upgrading technology, which is applied in the direction of AC-DC network circuit layout, AC network circuit, DC network circuit device, etc., can solve the problem that the DC component of the distribution network cannot be carried out in an orderly manner at low cost, and lacks planning and connection, etc. problem, to achieve the effect of orderly introduction at low cost

Active Publication Date: 2019-10-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Application Information

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Problems solved by technology

[0005] The present invention provides a planning method for DC upgrading and reconstruction of multi-stage AC-DC hybrid distribution network, which is used to solve the problems caused by the existing planning method of AC-DC distribution network, which is only aimed at a single planning and lacks the planning connection between stages. The technical problem that the introduction of grid DC components cannot be carried out in an orderly manner at low cost

Method used

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  • Planning method for DC upgrade and reconstruction of multi-stage AC/DC hybrid power distribution network
  • Planning method for DC upgrade and reconstruction of multi-stage AC/DC hybrid power distribution network
  • Planning method for DC upgrade and reconstruction of multi-stage AC/DC hybrid power distribution network

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Embodiment 1

[0048] A planning method 100 for DC upgrade and transformation of multi-stage AC-DC hybrid distribution network, such as figure 1 shown, including:

[0049] Step 110: Based on the actual source-load operation scenario at the current stage, the genetic algorithm is used to perform DC transformation on the AC lines and AC nodes in the topology structure of the AC-DC hybrid distribution network planned in the previous stage, and obtain the topology structure of the distribution network Multiple distribution network topology children of ;

[0050] Step 120: Based on the above-mentioned multiple distribution network topology sub-generations, with the minimum unit output as the sub-goal and the minimum investment cost and operating cost as the main goal, perform nested optimization iterations to screen the optimal distribution network topology sub-generation generation;

[0051] Step 130 , based on the above-mentioned optimal distribution network topology child, obtain a new AC-DC...

Embodiment 2

[0136] A storage medium, in which instructions are stored, and when the computer reads the instructions, the computer is made to execute any one of the DC upgrading transformations of the multi-stage AC / DC hybrid distribution network as described in the first embodiment above planning method.

[0137] The relevant technical solutions are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to a planning method for DC upgrade and reconstruction of the multi-stage AC / DC hybrid power distribution network. The method comprises steps that based on a current actual source-load operation scenario, a genetic algorithm is utilized, an AC line and an AC node in the AC / DC hybrid power distribution network topology obtained in previous stage planning are subjected to DC reconstruction to obtain multiple power distribution network topology sub generations based on the power distribution network topology, the minimum output of a unit is taken as a sub goal, nested optimization is based on the minimum sum of investment expense and operating expense, the optimal power distribution network topology sub generation is screened, the corresponding AC / DC hybrid power distribution network topology is obtained, and the above process is repeated. The method is advantaged in that the AC line and the AC node in the previous planning result are subjected to DC reconstruction,the minimum expense of the reconstruction process is taken as a main goal, multi-stage reconstruction is performed, orderly introduction of DC components in the power distribution network can be effectively realized, moreover, the idea of two-layer optimization is introduced, the genetic algorithm is improved for optimal planning, and planning problem solving is realized.

Description

technical field [0001] The invention belongs to the field of power grid planning, and more specifically relates to a planning method for DC upgrading and transformation of a multi-stage AC-DC hybrid distribution network. Background technique [0002] With the innovation and development of new energy technology, the penetration of distributed power into the distribution network is the general trend of the future distribution network development. At the same time, driven by power electronics technology, the proportion of DC loads is also increasing. However, the traditional AC power distribution network is not suitable for this new scenario in many aspects. For example, most of the distributed power sources are DC power sources (or unstable AC power is converted to DC), which need to be connected to the AC distribution network through the converter. The same is true for the power grid, a large number of DC loads, and the investment cost is high. Therefore, compared with the A...

Claims

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Application Information

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IPC IPC(8): H02J4/00H02J3/00H02J3/02H02J1/00
CPCH02J4/00H02J3/00H02J3/02H02J1/00H02J2203/20
Inventor 何耿生卢东昊任俊谕韩天森陈金富孙辰军赵昭罗真乔琰
Owner HUAZHONG UNIV OF SCI & TECH
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