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Distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation

A distributed photovoltaic and second-order cone technology, applied in photovoltaic power generation, energy storage, AC network load balancing, etc., can solve problems such as intermittent output rate of photovoltaic power generation, increased difficulty of solving, and inability to describe power characteristics in detail

Active Publication Date: 2018-03-27
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Abstract
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AI Technical Summary

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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  • Distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation
  • Distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation
  • Distributed photovoltaic and energy storage coordinated planning method and system based on second-order cone relaxation

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Embodiment

[0100] 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:

[0101] S1: Site selection and capacity determination of the constructed distributed power generation model to obtain constraints and cost objective functions;

[0102] 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;

[0103] S3: Solve the transformed objective function in step S2, and use the solution result to coordinate planning of photovoltaic and energy storage data.

[0104] Step S1 also includes output modeling of the distributed power supply, and the modeling process is as follows:

[0105] S11: Simplification of continuous time;

[0106] 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. The method includes the steps of S1, performing siting and sizing for a distributed power supply model to be constructed, and obtaining constraint conditions and a cost objective function; S2, performing relaxation and optimization on the constraint conditions and the cost objective function of the distributed power supply model by using a second-order cone algorithm, and obtaining transformed constraint conditions and a transformed cost objectivefunction; and S3, solving the transformed objective function in the step S2, and performing coordinated planning of photovoltaic and energy storage data by using the solving result. The method and system of the invention has the beneficial effects of being capable of storing or discharging energy according to the load demand, adjusting the photovoltaic output, and balancing the load; being capableof suppressing the fluctuation of the photovoltaic output within a certain range, and improving the quality of the photovoltaic output electric energy; and effectively simplifying the model and solving the objective function faster by relaxation and transformation of the model using the second-order cone algorithm.

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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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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