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Wind-solar-storage combined frequency modulation method and system based on fuzzy logic control

A fuzzy logic, wind-solar storage technology, applied in the field of wind-solar-storage combined frequency modulation methods and systems, can solve problems such as the lack of a combined wind-solar-storage frequency modulation solution, and achieve the effects of eliminating the secondary drop problem, restraining the drop rate, and improving the inertia of the system

Pending Publication Date: 2022-04-12
NARI TECH CO LTD +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing frequency modulation methods mainly focus on wind-storage combination and solar-storage combination, and there is no solution for wind-storage-storage combination frequency modulation. With the increasing proportion of new energy, an effective technical solution is urgently needed to solve the existing technical problems

Method used

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  • Wind-solar-storage combined frequency modulation method and system based on fuzzy logic control
  • Wind-solar-storage combined frequency modulation method and system based on fuzzy logic control
  • Wind-solar-storage combined frequency modulation method and system based on fuzzy logic control

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Embodiment 1

[0074] The present invention provides a combined frequency modulation method based on fuzzy logic control, including the following content:

[0075] When responding to frequency increase events, wind power and photovoltaics can be operated at non-maximum power points to achieve load reduction operation, and the unsatisfactory part can be supplemented by absorbing energy from energy storage to the grid. However, the occurrence probability of the frequency drop event is greater, and the operation process is more complicated, so the present invention mainly studies and simulates the frequency drop situation.

[0076] Considering that there is no obvious regional division of photovoltaic output, while wind power generation is Figure 8 As shown, it can be divided into four major regions according to their wind speed and rotational speed. A-B is the start-up area of ​​the fan. At this time, it operates at the lowest speed and completes the transition from off-grid to grid-connecte...

Embodiment 2

[0129] The present invention also provides a wind-solar-storage combined frequency modulation system based on fuzzy logic control, including:

[0130] The collection module is used to obtain the total frequency deviation, frequency change rate, fan speed, fan output value and photovoltaic output value of the wind, solar, storage and power generation system;

[0131]The fuzzy logic control module is used to use frequency deviation and frequency change rate as the input of the preset first fuzzy logic controller to obtain the total active power increment required for frequency modulation of wind, light and storage, and use the fan speed and fan output value as The input of the preset second fuzzy logic controller is to obtain the frequency regulation participation coefficient of the fan to determine the frequency regulation output of the fan, and the photovoltaic output value and frequency deviation are used as the input of the preset third fuzzy logic controller to obtain the ph...

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Abstract

The invention discloses a wind and light storage combined frequency modulation method based on fuzzy logic control. The method comprises the following steps: acquiring the total frequency deviation, frequency change rate, fan rotating speed, fan output value and photovoltaic output value of a wind, light and storage power generation system; taking the frequency deviation and the frequency change rate as the preset input of a first fuzzy logic controller to obtain the total active power increment of frequency modulation required by wind, light and storage, and taking the fan rotating speed and the fan output value as the preset input of a second fuzzy logic controller to obtain a fan frequency modulation participation coefficient for determining the fan frequency modulation output; taking the photovoltaic output value and the frequency deviation as input of a preset third fuzzy logic controller to obtain a photovoltaic frequency modulation participation coefficient of photovoltaic frequency modulation output; wind, light and storage combined frequency modulation operation is realized through fuzzy logic control.

Description

technical field [0001] The invention belongs to the technical field of new energy grid-connected frequency stabilization, and in particular relates to a method and system for combined frequency regulation of wind, wind and storage based on fuzzy logic control. Background technique [0002] In recent years, the proportion of new energy in the power structure of the power system has been continuously increasing, among which wind power and photovoltaics are developing most rapidly. On the one hand, wind and solar generally operate at the maximum power point, and basically do not have the capability of primary frequency regulation; on the other hand, the characteristics of wind and solar power generation complicate the frequency and breadth of power system frequency regulation, and the threat to the frequency stability of the power system is becoming more and more prominent. By changing the control method of the converter through additional control, photovoltaic and wind power c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38H02J3/46H02J3/48H02J3/32H02J3/00
CPCY02E10/56Y02E10/76Y02E40/10Y02E70/30
Inventor 崔晓丹吴家龙冯佳期张晶晶许剑冰李威段方维任金华雷鸣杨天舒薛峰
Owner NARI TECH CO LTD
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