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Super capacitor-storage battery hybrid energy storage system based on impedance source topology

A hybrid energy storage system and supercapacitor technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as low system efficiency and slow power response output, achieve high boost ratio, and improve capacitor voltage stress , Capacitive voltage stress reduction effect

Pending Publication Date: 2022-03-22
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of slow power response output and low system efficiency in existing energy storage devices

Method used

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  • Super capacitor-storage battery hybrid energy storage system based on impedance source topology
  • Super capacitor-storage battery hybrid energy storage system based on impedance source topology
  • Super capacitor-storage battery hybrid energy storage system based on impedance source topology

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Embodiment Construction

[0040] Such as figure 1 , figure 2 As shown, the supercapacitor-battery hybrid energy storage system based on impedance source topology, the system includes: bidirectional impedance source converter, energy storage unit;

[0041] The bidirectional impedance source converter includes capacitors C1, C2, C3, and C4, inductors L1, L2, and L3, and switch tubes S1, S2, S3, and S4;

[0042] The energy storage unit includes a battery BT and a supercapacitor SC;

[0043] One end of the inductor L1 is connected to the source of the switching tube S2, the drain of the switching tube S2 is connected to the other end of the inductor L3, one end of the inductor L3 is connected to the positive pole of the supercapacitor SC, and the negative pole of the supercapacitor SC is connected to the DC bus; the two ends of the capacitor C2 are respectively connected to the source of the switching tube S2, Supercapacitor SC negative pole;

[0044] The other end of the inductor L1 is connected to th...

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Abstract

The super capacitor-storage battery hybrid energy storage system based on the impedance source topology comprises a bidirectional impedance source converter, an energy storage unit, a sampling unit, a charging controller and a discharging controller. The energy storage unit comprises a storage battery BT and a super capacitor SC. The input end of the sampling unit is connected with the super capacitor SC, the storage battery BT and the direct current bus. The output end of the sampling unit is connected with the charging controller and the discharging controller. And the charging controller and the discharging controller are respectively connected with the control end of the switching tube. And according to the DC bus voltage / power signal collected by the sampling unit, the switching tube is controlled to be in different switching states, so that the hybrid energy storage system is charged or discharged. According to the hybrid energy storage system, the charging and discharging states of different types of energy storage elements in the device are controlled according to the change of the voltage / power of the direct current bus, and the different types of energy storage elements are reasonably utilized while voltage / power fluctuation is stabilized.

Description

technical field [0001] The invention relates to the technical field of DC microgrid energy storage, in particular to a supercapacitor-battery hybrid energy storage system based on impedance source topology. Background technique [0002] Introducing energy storage devices in DC microgrids to buffer power fluctuations Energy storage technology is currently the main means to solve the power imbalance problem of DC microgrids, and plays an indispensable role in integrating intermittent distributed energy into the grid. References [1] "Zhang Qinjin, Niu Miao, Liu Yancheng, Zeng Yuji, Chen Long. Energy storage bidirectional DC / DC converter adaptive charge-discharge seamless switching strategy [J / OL]. Electrical measurement and instrumentation: 1-11 [2021-10-27]). [0003] Due to the randomness of DC microgrid power fluctuations, energy storage devices are required to have high energy density, high power density, and long service life. At the current level of development, a single...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/36H02J3/38H02J3/24H02J7/34H02J7/06
CPCH02J3/32H02J3/36H02J3/38H02J3/24H02J7/345H02J7/06Y02E60/60
Inventor 陈曦郑峰
Owner CHINA THREE GORGES UNIV
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