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Method for stabilizing power fluctuation in time scale sections based on photovoltaic hybrid energy storage

A hybrid energy storage and power fluctuation technology, applied in photovoltaic power generation, reducing/preventing power oscillation, energy storage, etc., can solve problems such as large power fluctuations, photovoltaic power generation instability, etc., to improve the effect and solve the aliasing phenomenon , the effect of a clear division of labor

Pending Publication Date: 2020-07-31
TBEA SUNOASIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large power fluctuations caused by the intermittent and unstable photovoltaic power generation in the above-mentioned related fields, the present invention provides a method based on photovoltaic hybrid energy storage to stabilize power fluctuations in time scales

Method used

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  • Method for stabilizing power fluctuation in time scale sections based on photovoltaic hybrid energy storage
  • Method for stabilizing power fluctuation in time scale sections based on photovoltaic hybrid energy storage
  • Method for stabilizing power fluctuation in time scale sections based on photovoltaic hybrid energy storage

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Embodiment 1

[0035] Such as figure 1 As shown, this embodiment provides a method for suppressing power fluctuations based on photovoltaic hybrid energy storage in sub-time scales, including:

[0036] Step 1, output photovoltaic output curve P pv (t);

[0037] Step 2, judge the photovoltaic output curve P pv (t) Whether it meets the requirements of grid connection, if so, directly connect to the grid, otherwise, perform hybrid energy storage to stabilize power fluctuation processing;

[0038] The hybrid energy storage includes power energy storage and energy energy storage.

[0039] Further, the processing of suppressing power fluctuations includes:

[0040] Step a, judging the photovoltaic output curve P that does not meet the grid-connected requirements pv (t) Is it greater than the climbing rate slope k of the small time scale segment 1 , if yes, discharge, otherwise charge;

[0041] Step b, judging the photovoltaic output curve P obtained after processing in step a pv (t) Whethe...

Embodiment 2

[0053] This embodiment provides a method for suppressing power fluctuations based on photovoltaic hybrid energy storage in sub-time scales, including:

[0054] Step 1, output photovoltaic output curve P pv (t);

[0055] Step 2, judge the photovoltaic output curve P pv (t) Whether it meets the requirements of grid connection, if so, directly connect to the grid, otherwise, perform hybrid energy storage to stabilize power fluctuation processing;

[0056] The hybrid energy storage includes power energy storage and energy energy storage.

[0057] Further, the processing of suppressing power fluctuations includes:

[0058] Step a, judging the photovoltaic output curve P that does not meet the grid-connected requirements pv (t) Is it greater than the climbing rate slope k of the small time scale segment1 , if yes, discharge, otherwise charge;

[0059] Step b, judging the photovoltaic output curve P obtained after processing in step a pv (t) Whether the corresponding photovolta...

Embodiment 3

[0071] This embodiment provides a method for suppressing power fluctuations based on photovoltaic hybrid energy storage in sub-time scales, including:

[0072] Step 1, output photovoltaic output curve P pv (t);

[0073] Step 2, judge the photovoltaic output curve P pv (t) Whether it meets the requirements of grid connection, if so, directly connect to the grid, otherwise, perform hybrid energy storage to stabilize power fluctuation processing;

[0074] The hybrid energy storage includes power energy storage and energy energy storage.

[0075] Further, the processing of suppressing power fluctuations includes:

[0076] Step a, judging the photovoltaic output curve P that does not meet the grid-connected requirements pv (t) Is it greater than the climbing rate slope k of the small time scale segment 1 , if yes, discharge, otherwise charge;

[0077] Step b, judging the photovoltaic output curve P obtained after processing in step a pv (t) Whether the corresponding photovol...

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Abstract

The invention discloses a method for stabilizing power fluctuation in time scale sections based on photovoltaic hybrid energy storage. The method comprises the steps of outputting a photovoltaic output curve Ppv (t); and judging whether the Ppv (t) meets a grid connection condition or not, and if so, carrying out grid connection, and otherwise, stabilizing power fluctuation processing. The power fluctuation stabilizing processing comprises the steps of a judging whether Ppv (t) which does not meet the grid connection requirement is larger than the slope k1 of the ramp rate or not, if yes, discharging, and otherwise, charging; b judging whether the photovoltaic output time corresponding to the Ppv (t) processed in the step a meets the requirement of a large time scale section or not, if so,entering a step c, and otherwise, repeating the step a; c judging whether the Ppv (t) is greater than the slope k2 of the ramp rate or not, if so, discharging, and otherwise, charging; and d judgingwhether the Ppv (t) processed in the step c meets the grid connection requirement or not, if so, carrying out grid connection, and otherwise, repeating the step c to carry out segmented power fluctuation stabilization by adopting a super capacitor and compressed air energy storage. The aliasing phenomenon of hybrid energy storage work is effectively solved, and a relatively good power fluctuationstabilization effect is obtained.

Description

technical field [0001] The invention relates to the technical field of new energy management, in particular to a method for suppressing power fluctuations based on photovoltaic hybrid energy storage in time scale segments. Background technique [0002] In recent years, with the development of the economy, the problems of energy shortage and environmental pollution have become increasingly prominent, and the power generation of renewable energy represented by photovoltaics has grown rapidly. However, large-scale photovoltaic grid connection, the characteristics of uncertainty, volatility and randomness of photovoltaic output power are likely to affect the power quality and stability of the grid, and cause a certain impact on the grid. At this stage, adding energy storage devices is an effective means to solve photovoltaic power fluctuations. [0003] The energy storage system can be divided into two types according to the type, one is energy-type energy storage with high ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/48H02J3/24H02J3/28
CPCH02J3/48H02J3/24H02J3/28H02J7/345Y02E10/56Y02E70/30
Inventor 王宗尧何浪昝夏露贾显李胜
Owner TBEA SUNOASIS
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