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Distributed photovoltaic access prediction method, system and device

A technology of distributed photovoltaics and prediction methods, which is applied in the direction of circuit devices, character and pattern recognition, instruments, etc., can solve problems that affect the safety and stability of power systems, and the impact of power grid fluctuations, and achieve the effect of improving accuracy and typicality

Active Publication Date: 2022-07-26
南京瀚元科技有限公司
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Problems solved by technology

However, with the increase of the proportion of distributed energy, the power grid is more and more affected by fluctuations
When distributed energy sources are connected to the grid on a large scale, it will seriously affect the security and stability of the power system

Method used

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  • Distributed photovoltaic access prediction method, system and device
  • Distributed photovoltaic access prediction method, system and device
  • Distributed photovoltaic access prediction method, system and device

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Embodiment Construction

[0062] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0063] like figure 1 As shown, a distributed photovoltaic access prediction method includes the following steps:

[0064] For a forecast period, such as six months or one year, do the following:

[0065] S1. Obtain photovoltaic station data, power load data, power grid equipment data and weather-related data.

[0066] 1. PV station data includes active power, reactive power, daily power generation, capacity of a single PV power station, PV output efficiency coefficient, and ...

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Abstract

The invention provides a distributed photovoltaic access prediction method, system and device. The method comprises the following steps: acquiring photovoltaic station data, electrical load data, power grid equipment data and meteorological related data; determining a representative day according to the photovoltaic station data, the electrical load data and the meteorological related data, and calculating the load at each moment of the representative day and the photovoltaic output at each moment of the representative day; updating equipment equivalent impedance data according to the power grid equipment data; carrying out load flow calculation according to the active power and reactive power of the inverter side of the photovoltaic station, the load at each moment of the representative day, the photovoltaic output at each moment of the representative day and equipment equivalent impedance data to obtain a calculation result of each piece of equipment at each moment; and comparing the calculation result of each device at each moment with a preset value, and determining an abnormal device. According to the invention, the operation state of the power grid after distributed photovoltaic grid connection can be simulated, and abnormal equipment is pre-judged in advance, so that a more scientific and accurate evaluation basis is provided for operation and maintenance personnel.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a distributed photovoltaic access prediction method, system and device. Background technique [0002] Due to the randomness and uncertainty of the output of wind and solar power generation, the power flow and harmonics of the power grid will be difficult to predict after the distributed energy is connected to the grid. With the increasing use of distributed energy machines, it will inevitably bring many problems to the planning, operation and protection of the power system. [0003] At present, the proportion of distributed photovoltaics in China is relatively small, and most of the photovoltaic access planning work is based on the requirements of "connected as needed". However, as the proportion of distributed energy resources increases, the power grid is increasingly affected by fluctuations. When distributed energy is connected to the grid on a large sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/00G06F30/20G06K9/62
CPCH02J3/381H02J3/004G06F30/20H02J2203/10H02J2203/20H02J2300/24G06F2113/04G06F18/23213
Inventor 钱琪马超夏宗阳
Owner 南京瀚元科技有限公司
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