Abstract:

There are many items of types test for power conversion system,and the relevant standards lack the necessary provisions for the methods and contents of some test items.As a result,different institution and person may cause large differences in the actual test of the project.This article mainly discusses some abnormal situations that occur in high-power power conversion system due to different loads and different wiring methods of test instruments during the test of total harmonic distortion rate,aiming to attract the attention of inspectors and provide reference for product improvement and standard improvement of power conversion system.

Key words: power conversion system (PCS), type test, total harmonic current distortion rate, total harmonic voltage distortion rate