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Method for stabilizing wind-solar generation system output power fluctuation with composite energy storage technology

A technology for output power and wind power generation, applied in the direction of single-network parallel feeding arrangement, AC network load balancing, etc., can solve problems such as output power fluctuations and smooth power fluctuations

Active Publication Date: 2013-04-03
ZHEJIANG UNIV
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  • Description
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Problems solved by technology

[0013] The purpose of the present invention is to overcome the shortcomings of the existing single energy storage technology in stabilizing power fluctuations, and provide a method for stabilizing the output power fluctuations of wind and solar power generation systems using composite energy storage technology

Method used

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  • Method for stabilizing wind-solar generation system output power fluctuation with composite energy storage technology
  • Method for stabilizing wind-solar generation system output power fluctuation with composite energy storage technology
  • Method for stabilizing wind-solar generation system output power fluctuation with composite energy storage technology

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Embodiment

[0121] Step 1: Combined with the actual situation of the specific area, extract the classic wind speed data in the area, call the particle swarm optimization algorithm (PSO), and optimize the control parameters A, B, C, T of the variable time constant control f1_max , T f1_min , T f2_max , T f2_min And the capacity used by supercapacitors and batteries.

[0122] Table 1 Considering the parameters of variable time constant control and the calculation results of energy storage capacity

[0123]

[0124] Step 2: According to the control parameters obtained in step 1, the inertial time constant of the supercapacitor is designed by the formula (1), and the inertial time constant is adjusted in real time according to the current power command value.

[0125] T f 1 = T f 1 ...

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Abstract

The invention discloses a method for stabilizing a wind-solar generation system output power fluctuation with a composite energy storage technology. The method puts forward a variable time constant filter control in the process of stabilizing the power fluctuation, optimizes a time constant of a low-pass filter in real time, realizes a flexible and fast control of a charging and discharging power of an energy storage system, improves the operation of the energy storage system and reduces the use capacity of the energy storage; the maximum output power control which is put forward ensures that the stored energy is operated in a reasonable range simultaneously. The method uses the composite energy storage technology and combines the energy storage system with a rapid response characteristic and the energy storage system with a large-capacity storage characteristic to stabilize the power fluctuation; the two energy storage devices make up defects with each other so as to reach a better stabilizing effect and greater economic benefits. The method meets a trend of applying energy storage technology to the new energy power generation and can provide a reference for the new energy grid problem.

Description

technical field [0001] The invention belongs to the field of new energy in electric power systems, and relates to the application of energy storage technology in the grid connection of new energy in electric power systems, in particular to a method for using composite energy storage technology to stabilize output power fluctuations of wind and solar power generation systems. Background technique [0002] In recent years, the research on distributed power generation technology has made great progress, and various distributed power generation technologies have gradually matured, with wind power generation and photovoltaic power generation being the most typical. Wind power and solar power have the advantages of abundant reserves, no pollution, and renewable energy, which make them promising alternative energy sources in the future. However, the output power of distributed power generation units such as wind power and solar power is intermittent and random. Fluctuations in wind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
Inventor 江全元刘霞汪海蛟张宋彬龚裕仲洪海生许建兵
Owner ZHEJIANG UNIV
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