DC voltage measurement anomaly detection method for extra-high voltage flexible DC power transmission system
A DC voltage, flexible DC technology, applied in electrical components, circuit devices, power transmission AC networks, etc., can solve problems such as single measurement abnormality in UHV flexible DC transmission systems
Pending Publication Date: 2022-03-18
CHINA SOUTH POWER GRID ELECTRIC POWER RES INST
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[0007] This application provides a DC voltage measurement abnormality detection method for an UHV flexible direct current transmission system, which solves the problem that the existing technology mainly focuses on conventional DC voltage measurement abnormality fault location methods and rapid diagnosis methods, which are not suitable for UHV flexible direct current transmission systems Technical Issues in the Detection of Single Measurement Anomalies
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[0062] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0063] It should be understood that this application applies to UHV flexible direct current transmission systems, please refer to figure 1 , figure 1 It is a typical topology diagram of a single station of the UHV flexible direct current transmission system in the embodiment of this application, as shown in figure 1 shown.
[0064] The UHV flexible direct curren...
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The invention discloses a DC voltage measurement anomaly detection method for an extra-high voltage flexible DC power transmission system, and the method comprises the steps: achieving the obtaining of the voltage of a valve group through the judgment of the operation mode of the valve group of a detection electrode, collecting the voltage value of each voltage measurement point of the detection electrode, and carrying out the comparison and judgment according to the arrangement condition of an actual voltage measurement point. The abnormal condition of each voltage measuring point is determined, the problem of abnormal measurement of the voltage measuring points is solved through a measuring point replacement mode according to the actual structure of the extra-high voltage flexible direct current power transmission system, and the problem that the prior art mainly focuses on a conventional direct current voltage measurement abnormal fault positioning method and a rapid diagnosis method is solved. And the method is not suitable for single measurement abnormity detection of the extra-high voltage flexible direct current power transmission system.
Description
technical field [0001] The present application relates to the technical field of power systems, and in particular to a method for detecting abnormalities in DC voltage measurement of UHV flexible DC transmission systems. Background technique [0002] After more than 40 years of development, the high-voltage direct current transmission system (LCC-HVDC) of grid commutation converter based on thyristor technology has become very mature. At present, LCC-HVDC is widely used in long-distance large-capacity power transmission, asynchronous grid interconnection and other occasions. However, LCC-HVDC has high requirements on the connected AC power grid, and cannot realize passive operation. It needs to consume a large amount of reactive power during operation, which restricts its further development to a certain extent. [0003] Modular multilevel converter (MMC) has the advantages of modular design, strong scalability, flexible operation of four-quadrant power, less AC voltage har...
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Login to View More IPC IPC(8): H02J13/00G01R31/08H02J3/36
CPCH02J13/00002G01R31/086H02J3/36Y02E60/60
Inventor 陈钦磊李书勇郭琦罗超林雪华曾冠铭刘志江陈德扬卢远宏
Owner CHINA SOUTH POWER GRID ELECTRIC POWER RES INST