Coordinated planning method and system for distributed photovoltaic and energy storage based on second-order cone relaxation

A distributed photovoltaic and second-order cone technology, which is applied in the field of power system distribution, can solve problems such as complex models, increased difficulty in solving, and intermittent output of photovoltaic power generation, and achieve the effects of smoothing fluctuations, simplifying models, and improving quality

Active Publication Date: 2021-09-07
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0002] Photovoltaic power generation is a power generation method that converts the light energy irradiated by the sun into DC power, but the output rate of photovoltaic power generation is intermittent
[0003] In the existing photovoltaic and energy storage coordinated planning method, the modeling of photovoltaic and energy storage is not very accurate, and the characteristics of the power supply cannot be described in detail, and the model is complex, which increases the difficulty of solution

Method used

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  • Coordinated planning method and system for distributed photovoltaic and energy storage based on second-order cone relaxation
  • Coordinated planning method and system for distributed photovoltaic and energy storage based on second-order cone relaxation
  • Coordinated planning method and system for distributed photovoltaic and energy storage based on second-order cone relaxation

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Embodiment

[0099] Example: such as figure 1 Shown; A distributed photovoltaic and energy storage coordinated planning method based on second-order cone relaxation, which includes: the method steps are as follows:

[0100] S1: Site selection and capacity determination of the constructed distributed power generation model to obtain constraints and cost objective functions;

[0101] S2: Use the second-order cone algorithm to perform relaxation optimization on the constraint conditions and cost objective function of the distributed power supply model, and obtain the transformed constraint conditions and cost objective function;

[0102] S3: Solve the transformed objective function in step S2, and use the solution result to coordinate planning of photovoltaic and energy storage data.

[0103] Step S1 also includes output modeling of the distributed power supply, and the modeling process is as follows:

[0104] S11: Simplification of continuous time;

[0105] Divide any day into 24 time per...

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Abstract

The invention discloses a distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation, which includes S1: performing site selection and capacity determination on the constructed distributed power supply model, and obtaining constraint conditions and cost objective functions; S2 : Use the second-order cone algorithm to relax and optimize the constraint conditions and cost objective function of the distributed power supply model, and obtain the transformed constraint conditions and cost objective function; S3: Solve the transformed objective function in step S2, and use the solution results to Photovoltaic and energy storage data for coordinated planning. The beneficial effects obtained by the present invention are: the electricity can be stored or released according to the load demand, the photovoltaic output can be adjusted, and the load can be balanced; the fluctuation of the photovoltaic output can be stabilized within a certain range, and the quality of the photovoltaic output electric energy can be improved; the model can be relaxed by using the second-order cone algorithm Transformation, effectively simplify the model, and solve the objective function faster.

Description

technical field [0001] The invention belongs to the field of power system distribution, and relates to a second-order cone relaxation algorithm, and more specifically, to a distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation. Background technique [0002] Photovoltaic power generation is a power generation method that converts the light energy irradiated by the sun into DC power, but the output rate of photovoltaic power generation is intermittent. [0003] In the existing photovoltaic and energy storage coordinated planning method, the modeling of photovoltaic and energy storage is not very accurate, and the characteristics of the power supply cannot be described in detail, and the model is complex, which increases the difficulty of solution. Contents of the invention [0004] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a distributed photovo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/28
CPCH02J3/383H02J3/28H02J2203/20Y02E10/56Y02E70/30
Inventor 王建国徐瑞林陈涛周婧婧李俊杰李哲吴志顾晨骁刘亚斐
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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