A kind of through protection detection method and related device of full-bridge power module
The technology of a power module and a detection method is applied in the field of through protection detection of a full bridge power module, and can solve problems such as no detection method for a through protection of a full bridge power module
Active Publication Date: 2022-07-01
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology
[0005] This application provides a full-bridge power module cut-through protection detection method and related devices, which can detect the full-bridge power module through-protection function, and solve the problem that there is currently no detection method for full-bridge power modules. question
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Embodiment Construction
[0046] Embodiments of the present application provide a method and a related device for detecting the shoot-through protection of a full-bridge power module, which can detect the shoot-through protection function of the full-bridge power module, and solve the problem that there is currently no detection method for the shoot-through protection for a full-bridge power module. technical issues.
[0047] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative ...
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The present application discloses a shoot-through protection detection method and a related device for a full-bridge power module, wherein the method includes: charging the voltage of a capacitor in the full-bridge power module to a preset voltage value; when the full-bridge power module operates normally, sending a control Commands are sent to the power tube and bypass switch in the full-bridge power module, so that the power tube in the full-bridge power module has a pass-through fault; the pass-through protection function of the faulty power tube is activated, and a blocking signal is sent to the faulty power tube to obtain the pass-through fault. Whether to clear the first detection result; shield the outlet of the direct protection function of the faulty power tube to keep the faulty power tube connected, so that the second detection result is obtained after the capacitor is directly discharged; according to the first detection result and the second detection result, Get the shoot-through protection detection result of the full-bridge power module. The full-bridge power module can be tested for the straight-through protection function, which solves the technical problem that there is no current detection method for the straight-through protection for the full-bridge power module.
Description
technical field [0001] The present application relates to the technical field of flexible direct current transmission systems, and in particular, to a direct protection detection method and related device of a full-bridge power module. Background technique [0002] With the development of power grid technology, the flexible DC transmission system has been developed for many years, and the technology has become very mature, making the flexible DC transmission system widely used in long-distance large-capacity power transmission, asynchronous grid interconnection and other occasions. [0003] The converter valve of the flexible DC transmission system includes a full-bridge power module (specific structure such as figure 1 shown), if the driven upper and lower bridge arm tubes are directly connected, the bridge arm will be short-circuited and a large current will be generated, causing the power tube to blow up. In order to avoid the above phenomenon, the full-bridge power modu...
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IPC IPC(8): G01R31/28
CPCG01R31/2827
Inventor 毕超豪薛云涛朱博陆国俊洪海程吴嘉琪徐义良
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD