A sliding mode guidance control method and device for a supercapacitor energy storage system
A supercapacitor and supercapacitor technology, applied in circuit devices, battery circuit devices, collectors, etc., can solve problems such as voltage deviation, easy overcharging of batteries, low energy efficiency, etc., to achieve suppression of switch jitter, good scalability, The effect of improving energy efficiency
Active Publication Date: 2022-04-01
CENT SOUTH UNIV
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Problems solved by technology
Although the decentralized control method has been widely used in practice, this method has two limitations: 1) the battery is prone to overcharging due to the thermal effect of the balancing resistors causing voltage deviation; 2) due to the high-voltage characteristics of the battery during charging, the energy efficiency relatively low
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[0040] This embodiment is carried out based on the technical solution of the present invention, provides detailed implementation and specific operation process, and further explains the technical solution of the present invention.
[0041] see figure 1 , a sliding mode guide control device for a supercapacitor energy storage system provided in this embodiment is used to charge the supercapacitor energy storage system; the supercapacitor energy storage system includes several supercapacitor units connected in series, such as figure 2 As shown, each supercapacitor unit includes a single supercapacitor, a MOSFET switch and a switch resistor, and the switch resistor is connected in series with the switch and then connected in parallel with the supercapacitor monomer to form a switch resistance circuit of the supercapacitor monomer; The sliding mode guiding control device includes a power supply module, a voltage measurement module, an integrated main control module, a switch contro...
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The invention discloses a sliding mode guidance control method and device for supercapacitor energy storage system charging. The tree is used as a communication topology for the charging of the supercapacitor energy storage system; during the charging of the supercapacitor energy storage system, the terminal voltage of each supercapacitor is collected periodically, and the terminal voltage data is sent to the local and lower supercapacitors according to the communication topology The controller of the unit; the controller of each supercapacitor unit calculates the voltage tracking error and generates a switch control signal based on sliding mode control when the terminal voltage data of the local and upper supercapacitor cells are obtained in each cycle; the switch control signal is converted is a driving signal to drive the switch in the local supercapacitor unit to be turned on and off. The invention can reduce the voltage deviation, improve the reliability of the system, effectively improve the energy efficiency and have good scalability.
Description
technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a sliding mode guidance control method and device for a supercapacitor energy storage system. Background technique [0002] In practical applications, supercapacitors are usually connected in series as fixed modules to meet the voltage requirements of application scenarios. Due to manufacturing tolerances, supercapacitors are usually affected by voltage imbalance, which may cause some supercapacitors to be overcharged during the charging process, so that the reliability and lifetime of supercapacitor energy storage systems composed of multiple supercapacitors will be degraded. Therefore, balancing circuits are usually applied to supercapacitor energy storage systems to eliminate imbalances and improve system reliability. Existing supercapacitor balancing circuits can be classified into two categories, namely active balancing circuits and passive balancing circuits. Acti...
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IPC IPC(8): H02J7/00
CPCH02J7/0019H02J2207/50
Inventor 李恒白璐廖洪涛刘勇杰武悦张晓勇蒋富杨迎泽刘伟荣彭军黄志武
Owner CENT SOUTH UNIV