Charging control method, device and medium for hybrid multi-terminal direct current transmission system
A charging control method and power transmission system technology, which is applied to electrical components, power transmission AC networks, etc., can solve problems such as charging methods that cannot be adapted, and achieve the effect of ensuring equipment safety
Active Publication Date: 2021-07-30
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology
However, there is currently no precedent for the charging method of the hybrid multi-terminal direct current transmission system, and due to the particularity of the hybrid multi-terminal direct current transmission system structure, the charging method of the traditional direct current transmission system cannot be adapted to the hybrid multi-terminal direct current transmission system
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[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0050] seefigure 1 , is a schematic flowchart of steps of a charging control method for a hybrid multi-terminal direct current transmission system provided by an embodiment of the present invention. A charging control method for a hybrid multi-terminal direct current transmission system provided by an embodiment of the present invention is applicable to a multi-terminal direct current transmission system including one conventional direct current converter station LC...
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The invention discloses a charging control method for a hybrid multi-terminal DC power transmission system. First, a line connection between a conventional DC converter station and a first flexible DC converter station is established, and then the conventional DC converter station, the first flexible DC converter station, and the first flexible DC converter station are sequentially controlled. The AC side of the valve group to be put into operation in the flexible DC converter station and the second flexible DC converter station is charged, and finally the line connection between the first flexible DC converter station and the second flexible DC converter station is established. For the double-valve group operation structure, it is necessary to control the charging of the low-side valve group first, and then control the charging of the high-side valve group. The invention also discloses the corresponding device and storage medium. By adopting the embodiment of the invention, the connection sequence and charging sequence between each converter station, as well as the charging sequence of the same high-end and low-end valve groups are all specified, so as to Realize the safe charging requirements of the hybrid multi-terminal direct current transmission system, ensure the equipment safety of the hybrid multi-terminal direct current transmission system, and meet the actual application requirements of the direct current transmission project.
Description
technical field [0001] The invention relates to the technical field of high-voltage direct current transmission, in particular to a charging control method, device and medium for a hybrid multi-terminal direct current transmission system. Background technique [0002] At present, the power industry is developing toward the accelerated utilization of clean energy and large-scale grid interconnection. The UHV multi-terminal DC transmission system with a mixed configuration of current source converters and voltage source converters is a hot spot in recent engineering research. It will play a very important role in the development of power system, and it will soon enter the stage of engineering application. The hybrid multi-terminal DC transmission system can combine the respective advantages of traditional DC and flexible DC to realize multi-source power supply and multi-drop power reception, and provide a more flexible and fast power transmission method to obtain greater econo...
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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2300/40Y02E60/60
Inventor 李书勇刘志江郭琦林雪华陈钦磊陈德扬卢远宏曾冠铭罗超
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD