Power grid support type active current converter and control method and current conversion system thereof
A control method and supporting technology, applied in control/regulation systems, power transmission AC networks, conversion of DC power input to DC power output, etc., can solve the problem that multi-level converters cannot be used as black-start power sources for restarting regional power grids, etc. question
Pending Publication Date: 2022-03-15
NR ELECTRIC CO LTD +1
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Problems solved by technology
[0004] Purpose of the invention: This application provides a grid-supported active converter, the purpose of which is to solve the technical problem that the multi-level converter in the prior art cannot be used as a black-start power supply for restarting the regional grid when the grid loses power; To provide a control method for the above-mentioned grid-supported active converter, the purpose is to provide a variety of selectable control modes for the grid-supported active converter; in addition, the application also provides a converter system, the purpose It is to provide an application method of the grid-supported active converter
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[0071] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this 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.
[0072] In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated Ground connection; it can be mechanical connection, electrical connection or mutual communication; it can be direct connection or indirect connection through an intermediary, and it can be the internal...
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The invention discloses a power grid supporting type active current converter, a control method thereof and a current conversion system, and belongs to the technical field of high-power power electronic current conversion. The power grid support type active current converter comprises an active current conversion chain and a valve control system. The active current conversion chain comprises at least one active module, and the active module comprises an energy storage unit, a power unit, a power control module and an energy storage control module; wherein the power control module controls the power unit to work, the energy storage control module takes energy from an energy storage element of the energy storage unit and controls the energy storage unit to work, and the valve control system communicates with the energy storage control module and the power control module. The energy storage control module taking electricity from the energy storage element is arranged in the active module, so that the energy storage control module can still work normally when the power grid loses electricity, and the black start function is realized in cooperation with the power control module.
Description
technical field [0001] The application belongs to the technical field of high-power electric power electronic conversion, and specifically relates to a grid-supported active converter, a control method thereof, and a converter system. Background technique [0002] In the field of large-capacity and high-power power electronic conversion technology, multi-level converters use modular cascade technology to integrate energy storage devices into sub-modules, which have high modularity, good harmonic characteristics, and equivalent switching frequency. Low-level advantages, it has become the standard topology in the field of high-voltage power electronics. By integrating the energy storage unit as a sub-module in the modular multilevel converter, such as integrating the energy storage unit in the static var generator, realizing high-voltage AC direct-mounted energy storage, or integrating the energy storage unit in In the half-bridge module, high-voltage DC direct-mounted energy...
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IPC IPC(8): H02J3/36H02H7/10H02J3/28H02M3/155
CPCH02J3/36H02H7/10H02J3/28H02M3/155Y02E60/60
Inventor 谢晔源姚宏洋王宇朱铭炼
Owner NR ELECTRIC CO LTD