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Novel hybrid energy storage device and control method

A technology of hybrid energy storage and control methods, which is applied in energy storage, photovoltaic modules, AC network load balancing, etc.

Pending Publication Date: 2021-11-09
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using a single energy storage device, due to multiple charging and discharging, the damage to the energy storage device is very large

Method used

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  • Novel hybrid energy storage device and control method
  • Novel hybrid energy storage device and control method
  • Novel hybrid energy storage device and control method

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Embodiment Construction

[0026] A novel hybrid energy storage device and control method, including a power generation unit and a hybrid energy storage unit, wherein the power generation unit includes a wind generator 8 and a photovoltaic array 9, the hybrid energy storage unit includes a battery 4 and a super capacitor 5, and the battery 4 and a super capacitor 5 are respectively connected to the input ports of the storage battery DC / DC bidirectional conversion unit 1 and the supercapacitor DC / DC bidirectional conversion unit 2, and the output ports of the battery DC / DC bidirectional conversion unit 1 and the supercapacitor DC / DC bidirectional conversion unit 2 are connected to the AC / DC The DC side of the bidirectional conversion unit 3 is connected, and the AC side of the AC / DC bidirectional conversion unit 3 is connected to the AC bus; the output end of the wind power generator 8 is connected to the AC bus through the machine-side converter 7 and the grid-side converter 6 in turn;

[0027] The gener...

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Abstract

The invention discloses a novel hybrid energy storage device and a control method. According to the device, a photovoltaic array and a wind driven generator serve as a power generation unit, a super capacitor and a storage battery serve as a hybrid energy storage unit, the super capacitor and the storage battery stabilize the voltage on a direct current bus of the hybrid energy storage unit through a super capacitor DC / DC bidirectional conversion unit and a storage battery DC / DC bidirectional conversion unit respectively, and the super capacitor and the storage battery realize grid connection through the AC / DC bidirectional conversion unit and the VSC control unit and compensate the output power of the solar photovoltaic array and the wind driven generator. According to the invention, the advantages of two primary energy storage devices are considered at the same time, the respective defects of two primary energy storage systems are made up, the operation stability and reliability of the power system can be ensured, and the problem of unstable output power of renewable energy sources is made up.

Description

technical field [0001] The patent of the present invention relates to the field of hybrid energy storage, in particular to a hybrid energy storage device and a control method. [0002] technical background [0003] In recent years, my country has vigorously developed clean renewable energy power sources, the demand for renewable energy has continued to grow, and the integration of renewable energy with the power grid has continued. Because the output power of renewable energy varies with the weather, it is impossible to formulate an accurate power generation plan, so large-scale renewable energy grid integration will affect the stability and reliability of power system operation. Therefore, the development of energy storage technology has become the focus of attention. [0004] We can temporarily store electricity generated from renewable sources in energy storage devices. Existing energy storage media can be divided into energy type and power type. Energy-based energy sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38H02S10/12H02S10/20
CPCH02J3/32H02J3/38H02S10/12H02S10/20H02J2300/24H02J2300/28Y02E70/30Y02E10/56
Inventor 王君瑞郭腾向上
Owner BEIFANG UNIV OF NATITIES
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