Energy storage inverter charging and discharging control circuit and control method thereof

An energy storage inverter, charge and discharge control technology, applied in the field of electronics, can solve problems such as poor flexibility and low adaptability, and achieve the effects of high engineering value, good adaptability and practicability, and good application prospects

Pending Publication Date: 2020-06-05
SUZHOU VOCATIONAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for existing circuits to adopt a single conversion circuit architecture to meet the needs of various applications, resulting in the need to reconfigure and design circuits for different applications, which has disadvantages such as poor flexibility and low adaptability

Method used

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  • Energy storage inverter charging and discharging control circuit and control method thereof
  • Energy storage inverter charging and discharging control circuit and control method thereof
  • Energy storage inverter charging and discharging control circuit and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 2 As shown, when the a1 and b1 ends of the switch S1 of the control circuit 2 are closed and turned on, and the a2 and b2 of the switch S2 are turned on, the bidirectional non-isolated DC-DC converter A1 and the bidirectional non-isolated DC-DC conversion The combined operation of the converter B and 2 forms a new cascaded bidirectional non-isolated converter circuit, which improves the voltage conversion and matching capabilities of charging and discharging.

Embodiment 2

[0031] Such as image 3 As shown, when the a1 and b1 terminals of the switch S1 of the control circuit 2 are closed and turned on, and the a2 and c2 of the switch S2 are turned on, the equivalent bidirectional non-isolated DC-DC converter A1 works alone and is suitable for voltage conversion Charging and discharging occasions with small range and no isolation application.

Embodiment 3

[0033] Such as Figure 4 As shown, when the a1 and b1 ends of the switch S1 of the control circuit 2 are closed and turned on, and the a2 and d2 of the switch S2 are turned on, the equivalent bidirectional non-isolated DC-DC converter A1 and the bidirectional isolated DC-DC Converter C works in 3-phase cascade, suitable for charging and discharging occasions that require high voltage conversion and isolation applications.

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PUM

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Abstract

The invention provides an energy storage inverter charging and discharging control circuit and a control method thereof. The control circuit comprises a bidirectional non-isolated DC-DC converter A, acontrol circuit, a bidirectional non-isolated DC-DC converter B, a bidirectional non-isolated DC-DC converter C and a controller. The control circuit has multiple working modes of isolation, non-isolation, wide-range conversion and the like at the same time; the requirements of energy storage charging and discharging application of an energy storage inverter under various different working conditions can be met; various electric energy functions can be achieved through one circuit architecture; good adaptability and practicability are achieved; the application requirements of charging and discharging circuits of different types of energy storage inverters can be met in cooperation with the control method of the control circuit; and very good application prospects and extremely high engineering value are achieved.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a charging and discharging control circuit and a control method for an energy storage inverter. Background technique [0002] The energy storage inverter, as an electric energy conversion device applied in the energy storage system, can realize the transformation, control and management functions of various electric energies. The function realization and high-efficiency operation of the system play an important role, especially in the new energy storage application projects of solar photovoltaic, wind power and other occasions. The charging and discharging control circuit needs to have two-way power conversion, which can carry out unified control and management on the charging and discharging of the energy storage battery. For different application occasions of energy storage inverters, different circuit methods are required. For example, some occasions require a...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0063H02J7/0068
Inventor 汪义旺张波宋佳
Owner SUZHOU VOCATIONAL UNIV
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