Voltage sag immunity acquisition method for equipment under test and test system
A voltage sag and equipment technology, which is applied in the field of voltage sag immunity acquisition methods and test systems of tested equipment, can solve problems such as low voltage sag immunity efficiency and the like
Inactive Publication Date: 2019-05-24
SHENZHEN POWER SUPPLY BUREAU
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[0004] Based on this, it is necessary to provide a method for obtaining the voltage sag immunity of the equipment under test and a test system for the low efficiency of obtaining the voltage sag immunity of the equipment in the traditional method
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[0074] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0075] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to"...
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The invention provides a voltage sag immunity acquisition method for equipment under test and a test system. The voltage sag immunity acquisition method for the equipment under test comprises the following steps: sequentially providing a group of different residual voltages under a determined working condition parameter of the equipment under test and a determined voltage sag characteristic parameter; acquiring a test waveform at each residual voltage; respectively analyzing each test waveform to obtain tolerable duration corresponding to each residual voltage; and generating a voltage tolerance curve of the equipment under test according to the residual voltages and the tolerable duration corresponding to the residual voltages. The voltage tolerance curve of the equipment under test can reflect the magnitude of the voltage sag immunity of the equipment under test. According to the acquisition method, one point on the voltage tolerance curve can be determined in one experiment, a testperiod is greatly shortened, and the test efficiency is improved.
Description
technical field [0001] The application relates to the field of equipment power quality testing and analysis, in particular to a method for obtaining voltage sag immunity of equipment under test and a testing system. Background technique [0002] With the development of power systems, sensitive loads have been widely used in power grids. Among many power quality problems, voltage sag has become the main power quality problem. Voltage sag refers to the phenomenon that the root mean square value of power frequency voltage at a certain point in the power system suddenly drops to 0.1p.u-0.9p.u, and returns to normal after a short duration of 10ms-1min. When a voltage sag occurs, it usually causes equipment such as AC contactors, trip units, relays, and equipment under test to malfunction. When these devices are used in industries such as medical treatment, telecommunications, and semiconductors, it will cause huge safety hazards and economic losses. Relevant statistical surveys...
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IPC IPC(8): G01R31/00G01R19/165
Inventor 汪清张华赢艾精文李艳李成升余鹏汪伟
Owner SHENZHEN POWER SUPPLY BUREAU