Control architecture of power electronic transformer and control method thereof
A technology of power electronics and transformers, which is applied in the control framework of power electronics transformers and its control field, which can solve the problems that DAB circuits cannot realize electrical isolation, the control framework cannot be directly applied, and soft switching technology cannot be realized, so as to meet the requirement of ensuring synchronization Effect
Pending Publication Date: 2021-11-30
NR ELECTRIC CO LTD +1
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Problems solved by technology
However, in the existing medium and high voltage application equipment, such as flexible direct MMC circuit or SVG equipment, generally a module has only one optical fiber to connect to the upper controller. This control architecture cannot be directly applied to the ISOP structure power electronic transformer based on the DAB circuit. It will cause the DAB circuit to fail to realize the electrical isolation function, or fail to realize the complex soft switching technology
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[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0041] It should be understood that the terms "first", "second" and the like in the claims, specification and drawings of the present application are used to distinguish different objects, rather than to describe a specific sequence. The terms "comprising" and "comprises" used in the specification and claims of this application indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or more other features, int...
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The invention provides a control architecture of a power electronic transformer and a control method thereof. The control architecture comprises an upper-layer controller, M sub-module units and a communication line, M is a natural number greater than or equal to 1, and the upper-layer controller comprises at least one controller communication port; each sub-module unit comprises at least two sub-module power circuits and at least one isolation element, each sub-module power circuit comprises a sub-module controller and an AC-DC converter, and each sub-module controller comprises at least one sub-module communication port; the AC-DC converter comprises at least one AC port and at least one DC port; the isolation element comprises at least two isolation ports, and the isolation ports are connected with an alternating current port of the alternating current-direct current converter; and the communication line is connected with the upper layer controller and the sub-module controller, or is connected with the sub-module controllers of different sub-module units, or is connected with different sub-module controllers of the same sub-module unit.
Description
technical field [0001] The present application relates to the field of power electronics application technology, in particular to a control framework and a control method of a power electronic transformer. Background technique [0002] The power electronic transformer is a device that uses power electronic technology to realize electric energy conversion. According to the different circuit topology used, the power electronic transformer can realize the conversion from medium / high voltage AC to low voltage DC, and can also realize the conversion from medium / high voltage DC to low voltage DC. Compared with traditional power frequency transformers, by using power electronics technology, the isolation transformer link in the circuit can reduce the volume and weight by increasing the switching frequency, thereby reducing the utilization rate of copper and iron. [0003] On the other hand, affected by the stress and cost of switching tube devices, power electronic transformers for...
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Login to View More IPC IPC(8): H02M7/219H02M3/335
CPCH02M7/219H02M3/335
Inventor 杨晨张中锋谢晔源魏星葛健祁琦王宇李海英
Owner NR ELECTRIC CO LTD