The Research On Transformer's Delivery Test System Base On Computer

Conventional transformer test rig based on pointer type instrument , not only slow, the low , test labour intensity is great, but also the precision , repetitiveness , credibility tested are bad. Such backward test rig and transformer design and manufacturing technology of high-speed development are extremely unbecoming . The transformer industry needs badly a kind of intelligent control based on computer test system. In order to reduce test labour intensity , reduce the impact on result of the test of the human factor and improve the test precision.In recent years the popularization of computer has exploited new ways on the development of auto test system. The fast progress of neoteric power electronics technology makes it possible to improve the automation of transformer test. In the background we carried through the research of the transformer's delivery test system based on computer.Aimed at the transformer's delivery test item for the general products of enterprises who produce medium/pint-sized transformers (capacity between 30kVA and 6300kVA, voltage level of 10kV or 35kV), the task designed an leave factory test system based on computer. The system used industry control computer as core control equipment, used Shandong LiChuang Company's EDA9000 series module as data sample and relay control and used RS485 serial communication structure.The paper discusses in detail every test items' testing theory and computer-based realizing measures in the transformer's delivery test. Specially, in allusion to winding's DC resistance test, a measure named gyrator is promoted which realized the resistance's fast and accuracy test. The paper introduced in detail EDA9000 series modules' hardware/software trait and its application.With VB6.0 of Microsoft, the paper exploited intelligence transformer leave factory test operation platform. On the base of it, the paper developed data management, query and test report writing program through software as COM technology, Access database and Word.The system greatly improved measure accuracy and data process veracity in the transformer's delivery test, reduced test work intensity and test time. Especially when it processes data the system minished a great deal in the affection of human factor and realized computer full auto control. The whole system is simply and convenient in operation. The system can work stably and its test accuracy is high. Some items of the system have been put into use at Henyang YouHao transformer, Ltd. The trial runindicated that the system's hardware is stable and credible and the software is easy in operation.