DC voltage measurement anomaly detection method for high-voltage flexible DC power transmission system
A DC voltage and flexible DC technology, applied in the field of power systems, can solve problems such as single measurement and abnormalities in high-voltage flexible DC transmission systems
Pending Publication Date: 2022-03-11
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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[0007] This application provides a method for detecting abnormality of DC voltage measurement in a high-voltage flexible direct current transmission system, which solves the problem of fault location methods and rapid diagnosis methods that mainly focus on conventional direct current voltage measurement abnormalities in the prior art, and is not suitable for single measurement of high-voltage flexible direct current transmission systems Technical Issues of Anomaly Detection
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[0055] 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.
[0056] It should be understood that this application applies to high-voltage flexible direct current transmission systems, please refer to figure 1 , figure 1 It is a typical topological diagram of a single station of the high-voltage flexible direct current transmission system in the embodiment of this application, as shown in figure 1 shown.
[0057] The HVDC ...
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The invention discloses a DC voltage measurement anomaly detection method for a high-voltage flexible DC power transmission system, and the method comprises the steps: obtaining the valve group voltage of a detection electrode, collecting the voltage value of each voltage measurement point of the detection electrode, carrying out the comparison and judgment according to the actual arrangement condition of the voltage measurement points, and determining the anomaly of each voltage measurement point. According to the actual structure of the high-voltage flexible direct-current power transmission system, the problem of abnormal measurement of voltage measurement points is solved through a measurement point replacement mode, 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 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 a high-voltage flexible DC transmission system. 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 v...
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IPC IPC(8): H02H7/26H02J3/36G01R31/08
CPCH02H7/268H02J3/36G01R31/086Y02E60/60G01R31/40G01R19/0084
Inventor 陈钦磊李书勇郭琦罗超曾冠铭林雪华刘志江陈德扬卢远宏
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD