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Direct-driving wave power-generating and energy-storing device and control method

A technology of wave power generation and energy storage devices, which is applied in the direction of AC network load balancing, etc., can solve the problems that the capacity and power requirements of the wave power generation system cannot be met at the same time, and the power fluctuation cannot be stabilized in real time, so as to solve the problem of DC bus power and voltage Fluctuation, reduced control difficulty, fast charging and discharging effects

Active Publication Date: 2012-03-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single energy storage system cannot meet the capacity and power requirements of the wave power generation system at the same time, and cannot achieve real-time stabilization of power fluctuations

Method used

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  • Direct-driving wave power-generating and energy-storing device and control method

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 As shown, the direct drive wave power generation energy storage device of the present invention includes a direct drive wave generator 1, an AC / DC (alternating current / direct current) converter 2, a DC / AC (alternating current / direct current) converter 3, several A load 4 , two DC / DC converters 5 , 6 , a hybrid energy storage system 7 and a controller 8 , wherein the hybrid energy storage system 7 includes a supercapacitor bank 71 and a battery pack 72 . The mover of the direct-drive wave generator 1 is connected to a buoy floating in the sea to convert the kinetic energy of the waves into low-frequency alternating current and send it to the input end of the AC / DC converter 2, and the AC / DC converter 2 converts the low-frequency alternating current into direct current. The output terminal of the AC / DC converter 2 is connected t...

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PUM

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Abstract

The invention relates to a direct-driving wave power-generating and energy-storing device and a control method. The direct-driving wave power-generating and energy-storing device is characterized by comprising a direct-driving wave generator, an AC / DC (Alternating Current or Direct Current) converter, a DC / AC (Direct Current or Alternating Current) converter, a plurality of loads, two DC / DC (Direct Current or Direct Current) converters, a mixed energy storing system and a controller, wherein the mixed energy storing system comprises an ultra-capacitor bank and a storage battery pack; the direct-driving wave generator is used for converting the kinetic energy of waves to a low frequency alternating current and sending to the AC / DC converter; the AC / DC converter is used for converting the low frequency alternating current to a direct current and connect and connected with the input end of the DC / AC converter through a direct current bus; the output end of the DC / AC converter is connected with the loads; the direct current bus is respectively connected with one ends of the two DC / DC converters, the other end of one of the two DC / DC converters is connected with the capacitor bank, and the other end of the other of the two DC / DC converters is connected with the storage battery pack; and the controller is used for controlling the ultra-capacitor bank and the storage battery pack to regulate power flow so as to keep the balance between the output power of the direct-driving wave generator and the power of the loads. The invention can be widely applied to the process of converting the kinetic energy of sea water fluctuation to the electric energy.

Description

technical field [0001] The invention relates to an energy storage device and a control method, in particular to a direct-drive wave power generation energy storage device and a control method for converting the kinetic energy of seawater fluctuations into electric energy. Background technique [0002] Ocean wave power generation converts the kinetic energy of vertical seawater fluctuations into electrical energy. Since the speed and frequency of ocean waves are relatively low, the general ocean wave cycle is from a few seconds to more than ten seconds. Kinetic energy is converted into a form that can drive a rotary motor, which increases the cost and complexity of the system, and adds additional energy loss and maintenance. The direct-drive wave power generation system generally uses a linear generator to directly convert the up and down movement of waves into electrical energy, and its maintenance cycle and cost are relatively small. However, the electric power generated b...

Claims

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Application Information

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IPC IPC(8): H02J3/32
Inventor 肖曦聂赞相康庆
Owner TSINGHUA UNIV
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