US 12,392,844 B2
Test system and method for power conversion devices, electronic device, and storage medium
Chunfa Wang, Ningde (CN); Yanming Zhao, Ningde (CN); Zhimin Dan, Ningde (CN); Yu Yan, Ningde (CN); Yuan Yao, Ningde (CN); Xiao Wang, Ningde (CN); and Xiyang Zuo, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on May 1, 2023, as Appl. No. 18/310,065.
Application 18/310,065 is a continuation of application No. PCT/CN2022/101835, filed on Jun. 28, 2022.
Prior Publication US 2023/0384395 A1, Nov. 30, 2023
Int. Cl. G01R 31/40 (2020.01); H02M 1/00 (2007.01); H02M 7/44 (2006.01)
CPC G01R 31/40 (2013.01) [H02M 1/0067 (2021.05); H02M 7/44 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A system for testing power conversion devices, comprising:
a first AC input/output section, configured to connect a power supply grid and an AC terminal of a first power conversion device;
a second AC input/output section, configured to connect the power supply grid and an AC terminal of a second power conversion device, wherein a DC terminal of the first power conversion device is connected to a DC terminal of the second power conversion device;
a control circuit, configured to control the first power conversion device and the second power conversion device to work simultaneously in different working modes; and
a processing circuit, configured to obtain test data of the first power conversion device and the second power conversion device when they work in different working modes, and evaluate the first power conversion device and the second power conversion device according to the test data;
wherein the first power conversion device and the second power conversion device are bidirectional AC/DC power conversion devices, the different working modes comprise a first working mode and a second working mode, the first working mode is an AC input and DC output mode, and the second working mode is a DC input and AC output mode; and
in controlling the first power conversion device and the second power conversion device to work simultaneously in different working modes, the control circuit is configured to:
control the first power conversion device to undergo a first stage of charge and discharge in the first working mode, and control the second power conversion device to undergo a first stage of charge and discharge in the second working mode;
determine whether the first power conversion device or the second power conversion device is abnormal during the first stage of charge and discharge according to the test data; and
when it is determined that the first power conversion device and the second power conversion device are not abnormal during the first stage of charge and discharge, and when the first stage of charge and discharge ends, control the first power conversion device to undergo a second stage of charge and discharge in the second working mode, and control the second power conversion device to undergo a second stage of charge and discharge in the first working mode.