Automatic Test Method of Typical Sensitive Equipment for Voltage Sag Withstand Characteristics Analysis

As production and life require more and more high-end and precise power equipment, high-quality electrical energy becomes the basis for the operation of these equipment. The impact of voltage sags on these devices has also increased. The quantification of the impact of voltage sags on various sensitive equipment through tests is an important basis for equipment manufacturers to improve the equipment's ability to withstand voltage sag and users to take governance measures. The existing test schemes are to manually change the voltage sag conditions, repeatedly test, manually analyze the test data and draw the voltage sag tolerance curve. The actual process operation is trivial and has low degree automation, which consumes a lot of human resources. This paper put forward an auto test system, it comprehensively considers the characteristics of voltage sag, sensitive equipment types, attributes, and load status, automatically generates voltage characteristic vectors, automatically tests and resets the equipment, automatically analyzes the experimental results and draws the voltage sag tolerance curve, which greatly reduces the test time and labor costs.