Power Converter Aging Test Loop Without External DC Loads
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Solution Overview
Problem
The existing methods for aging tests on power conversion devices require additional DC power supplies and loads, leading to high investment costs and energy consumption, especially when testing multiple devices simultaneously.
Innovation Solution
A test system where two power conversion devices are paired to act as both a load and a power source within a test loop, eliminating the need for additional DC power supplies and loads, and allowing simultaneous testing in different working modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional DC power supplies and loads are provided for aging tests on power conversion devices, then the reliability of the test system is improved, but the investment cost and energy consumption increase significantly
Solution Approach 1:
The power conversion devices under test serve themselves by using one device as a load for another device. The test system utilizes the devices' own functionality to perform aging tests without requiring external DC power supplies or loads, thereby reducing energy consumption and investment cost while maintaining test reliability
Solution Approach 2:
The power conversion devices are designed to function both as test subjects and as test equipment. Each device can operate in different working modes (charging mode and discharging mode) to serve as either a power source or a load, enabling multi-functional use that eliminates the need for dedicated DC power supplies and loads
2Stability of the object's composition
If additional DC power supplies and loads are provided for aging tests on power conversion devices, then the test system can operate stably, but the device occupies more space and investment cost increases
Solution Approach 1:
The system uses the power conversion devices themselves to provide the necessary power supply and load functions, eliminating the need for additional external equipment. This self-service approach reduces system complexity and occupied space while maintaining stable operation through the devices' inherent capabilities
Solution Approach 2:
The functions of DC power supplies and loads are merged into the power conversion devices under test. By combining multiple functions (test subject, power source, and load) into single devices, the system reduces the number of components, simplifies the overall structure, and decreases occupied space
3Productivity
If a large number of power conversion devices are aged at the same time using traditional methods, then the productivity is improved, but the investment cost and energy consumption increase significantly
Solution Approach 1:
Multiple power conversion devices perform aging tests simultaneously by互为 loads and power sources. This self-service mechanism allows parallel testing of multiple devices without requiring proportional increases in DC power supplies and loads, thereby improving productivity while keeping energy consumption and investment cost low
Data Source
AI summary
System and method for testing power conversion devices are provided. A power supply grid is connected to an AC terminal of a first power conversion device, the power supply grid is also connected to an AC terminal of the second power conversion device, and a DC terminal of the first power conversion device is connected to a DC terminal of the second power conversion device. In this way, a test loop is formed by the power supply grid, the first power conversion device and the second power conversion device. In this test loop, the first power conversion device and the second power conversion device act as a load and a power source, so no additional DC power supply and load are required during the test.