Fault protection device of high-energy power supply system and protection method thereof

A technology for fault protection and power system, applied in the direction of emergency protection circuit device, emergency protection circuit device, circuit device for limiting overcurrent/overvoltage, etc. The problem of secondary damage and the inability to reduce the manufacturing cost, so as to achieve the effect of fast and reliable protection function, good economy and lower production cost.

Active Publication Date: 2011-05-18
GLORYMV ELECTRONICS
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AI Technical Summary

Problems solved by technology

In the case of multiple capacitors with high energy storage density connected in parallel, once an internal short-circuit fault occurs in one of the capacitors, the energy stored in the remaining capacitors will all be poured into the short-circuit capacitor, and the capacitor will explode in this fault state. Consequences, will also cause secondary damage to the power supply system due to the explosion. In the prior art, in the application of multi-capacitor parallel connection, a current-limiting element with a certain resistance and inductance is connected in series to each para

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  • Fault protection device of high-energy power supply system and protection method thereof
  • Fault protection device of high-energy power supply system and protection method thereof

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[0018] Such as figure 1 As shown, in the present invention, the high voltage ends of two groups of energy storage capacitor groups 1 are connected in series with the current limiting element group 2 respectively, and then connected to the load in parallel with the controllable switch 5 and the energy absorption resistor 6; The voltage terminal is connected with a current detection unit 3 in series, so that the energy storage capacitor bank 1 is detected in real time through each group of current detection unit 3, and the opening and closing of the controllable switch 5 is controlled, and the energy absorption resistor 6 is connected to the fault in the event of a fault. The energy storage capacitor bank 1 for energy release.

[0019] The drive control unit 4 is connected in series between the two current detection units 3; the drive control unit 4 drives the opening and closing of the controllable switch 5, so that when the current detection unit 3 detects the energy storage capa...

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Abstract

The invention discloses a fault protection device of a high-energy power supply system and a protection method thereof. The fault protection device is characterized in that high-voltage ends of two groups of energy storage capacitor banks are respectively connected with a current-limiting element group in series and then connected with a controllable switch and an energy absorption resistor in parallel to be connected to a load; and low-voltage ends of the two groups of energy storage capacitor banks are respectively connected with one current detecting unit in series. By adopting the structure and the method, the fault protection device and the protection method thereof have the advantages of capabilities of reducing the size and the production cost of a high-energy power supply system by replacing a high-grade current limiting element with a small-size low-grade current limiting element, rapid and reliable protection function, wide applicability and favorable economy, simple structure and suitability for large-scale production and reformation.

Description

technical field [0001] The invention relates to a high-energy power supply system, in particular to a fault protection device and a protection method for the high-energy power supply system. Background technique [0002] The exploration and research of new energy has always been the research direction of the country's cutting-edge science and technology. With the continuous development of the country's science and technology and economy, the research requirements for new energy research devices have also been raised. The power system part of this type of research device is currently Usually, multiple capacitors are connected in parallel, so that the energy storage capacity can reach several megajoules to hundreds of megajoules, meeting the demand for high energy storage. [0003] The life of high-density energy storage capacitors has always been a key issue in research, especially in the process of fast charging and discharging, its life will be greatly shortened. In the ca...

Claims

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Application Information

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IPC IPC(8): H02H9/02
Inventor 王年峰宫龙刘林
Owner GLORYMV ELECTRONICS
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