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Distributed photovoltaic energy storage point selection layout optimization method

A distributed photovoltaic and layout optimization technology, which can be used in the fields of renewable energy integration, sustainable buildings, forecasting, etc., and can solve problems such as voltage overvoltage

Pending Publication Date: 2022-01-07
STATE GRID GASU ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a distributed photovoltaic energy storage point selection layout optimization method to solve the problem of voltage overvoltage in local areas after photovoltaics are added

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  • Distributed photovoltaic energy storage point selection layout optimization method
  • Distributed photovoltaic energy storage point selection layout optimization method
  • Distributed photovoltaic energy storage point selection layout optimization method

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Embodiment Construction

[0035] Based on the site selection sequence, the present invention establishes a point selection layout algorithm model in combination with power flow distribution and node voltage fluctuations in the system. Specifically, a distributed photovoltaic energy storage point selection layout optimization method of the present invention includes the following steps:

[0036] S1. Considering the number of layout points and configuration energy storage economy, establish the objective function.

[0037] Objective function F=min{f 电压 |maxf 效益}, f 电压 is the node voltage fluctuation index, f 效益 It is the comprehensive benefit index. (1) Considering the number of layout points, establish node voltage fluctuation index

[0038] Node voltage is one of the important indicators to characterize system stability and power quality. The voltage of each node in the system should be kept at a certain level, and its fluctuation should also be kept at a small level. After the distributed power ...

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Abstract

The invention relates to a distributed photovoltaic energy storage point selection layout optimization method. The method comprises the steps of S1, considering the layout point number and configuration energy storage economy, and building an objective function which comprises a node voltage fluctuation index and a comprehensive benefit index; and S2, considering the capacity of each point, and constructing a constraint condition at least comprising an energy storage layout point number constraint and an energy storage power and capacity constraint; S3, initializing a system model, calculating the power flow distribution of the system model, and substituting a power flow calculation result into the objective function and the constraint condition, and performing optimization solution to obtain an optimal solution. According to the invention, indexes such as system node voltage fluctuation, energy storage capacity and comprehensive benefits are comprehensively considered, the layout point number of an energy storage device and operation constraints of system energy storage are set, an energy storage optimal site selection configuration result (optimal layout point number, layout position and capacity of each point) is solved by using a multi-objective algorithm, and then the problem of overvoltage of a local area after photovoltaic addition is solved.

Description

technical field [0001] The invention relates to the technical field of new energy power systems, in particular to a method for optimizing the layout of distributed photovoltaic energy storage points. Background technique [0002] In recent years, with the continuous construction of distributed photovoltaics, the impact of photovoltaic access on regional power systems and provincial power grids has become increasingly serious. Photovoltaic power generation relies on light resources and has obvious fluctuations. As the penetration rate of photovoltaic power generation increases, it is easy to cause node voltage fluctuations. In severe cases, it can cause serious accidents such as power generation equipment off-grid, load shedding, and grid disconnection. In this context, equipping distributed photovoltaics with a certain capacity of energy storage has become a common method to improve the power quality and operational stability of the grid. [0003] At present, the cost of en...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/06G06Q10/04G06Q50/06
CPCH02J3/381H02J3/06G06Q10/04G06Q50/06H02J2203/10H02J2203/20Y02B10/10
Inventor 张金平周强王定美李津刘丽娟吕清泉王明松张健美张珍珍张彦琪高鹏飞张睿骁王晟刘海伟
Owner STATE GRID GASU ELECTRIC POWER RES INST
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