DC/DC chopper suitable for superconducting magnetic energy storage

A technology of superconducting magnetic energy storage and superconducting energy storage, which is applied in the field of superconducting magnetic energy storage, can solve the problems of low stability of superconducting magnetic energy storage system and inability to eliminate high-frequency PWM pulse voltage of superconducting magnets, and achieve The effect of improving stability

Active Publication Date: 2018-04-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method belonging to the technical field of superconducting magnetic energy storage, thereby solving the...

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  • DC/DC chopper suitable for superconducting magnetic energy storage
  • DC/DC chopper suitable for superconducting magnetic energy storage
  • DC/DC chopper suitable for superconducting magnetic energy storage

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0042] Such as figure 2 As shown, a DC / DC chopper suitable for superconducting magnetic energy storage includes a first chopper (chopper 1), a second chopper (chopper 2) and a connection to the first chopper tor and the DC capacitor of the second chopper C 2 ,

[0043] Chopper 1 consists of two IGBTs (S 1 and S 1 ), two parallel diodes (D 1 and D 2 ) and a filter inductor L. Among them, ...

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Abstract

The invention discloses a DC/DC chopper suitable for superconducting magnetic energy storage, comprising a first chopper, a second chopper, and a DC capacitor connecting the first chopper and the second chopper. The first chopper is characterized in that a first IGBT and a second IGBT are connected in series, a first diode and a second diode are respectively connected in parallel across the collector and the emitter of the first IGBT and the second IGBT, one end of a filter inductor is connected with the collector of the second IGBT and the other end to the positive of the DC capacitor, and the emitter of the second IGBT is connected to the negative of the DC capacitor. The second chopper is characterized in that a third IGBT is connected in series with a fourth diode, the third IGBT and the fourth diode are connected in parallel across the DC capacitor, a fourth IGBT and a third diode are connected in series and then connected in parallel across the DC capacitor, one end of a superconducting energy storage inductor is connected to the emitter of the third IGBT, and the other end is connected to the collector of the fourth IGBT. The DC/DC chopper can eliminate the high-frequency PWM pulse voltage of the superconductive energy storage inductor and improve the stability of the superconducting magnetic energy storage.

Description

technical field [0001] The invention belongs to the technical field of superconducting magnetic energy storage, and more specifically relates to a DC / DC chopper suitable for superconducting magnetic energy storage. Background technique [0002] Traditional power systems do not have large-capacity and fast access to electrical energy devices. Once the system is disturbed and the electromechanical power imbalance is caused, it may pose a threat to the system, and in severe cases, it will cause the system to collapse. Superconducting magnetic energy storage system (SMES) can provide fast response capacity for high-voltage transmission system, improve system stability, increase the limit transmission power of transmission lines, and can suppress fluctuations in grid frequency and voltage, and improve power supply quality. [0003] The superconducting magnet is a key component of SMES for energy storage, and it exchanges power with the AC grid through a power conditioning system ...

Claims

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Application Information

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IPC IPC(8): H02M3/155
CPCH02M3/155
Inventor 石晶廖孟夏仲周晓张立晖李媛媛苏荣宇郭树强朱凯张宇蒲东昇李书剑高铭含
Owner HUAZHONG UNIV OF SCI & TECH
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