Converter Module Fuse Isolation for DC Link Faults
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
AC power generators connected via converter modules face challenges in efficiently isolating faulty converter modules, as a fault in one module can affect the entire system, requiring effective disconnection of the faulty module and its DC link from other modules.
Innovation Solution
A power generation system with a controller that detects faults in converter modules, disconnects the faulty module from the power generator, and reroutes power through fuses associated with each converter module to isolate the fault by melting the fuse, allowing healthy modules to reconnect to the power grid for normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If converter modules are interconnected via DC links to improve system reliability and power distribution, then the system can continue operating with healthy modules after a fault, but a fault in one module can propagate to affect the functionality of the whole system
Solution Approach 1:
The system divides the converter system into independent modular units, each with its own DC link and protective fuse. The segmented architecture allows individual modules to be isolated without affecting others, preventing fault propagation while maintaining overall system reliability.
Solution Approach 2:
Fuses are introduced as intermediary protective elements between converter modules. These fuses act as mediators that can be selectively activated to isolate faulty modules from the interconnected DC link system, preventing harmful fault propagation while allowing healthy modules to continue operating.
2Reliability
If a faulty converter module is disconnected from the power generator and power is supplied through its fuse to melt the fuse, then the faulty module is isolated from the system, but the isolation process requires system shutdown and fuse replacement
Solution Approach 1:
The fuse, which represents a permanent failure component, is converted into a beneficial isolation mechanism. By deliberately supplying power through the fuse to melt it, the system transforms the fuse's destructive function into a controlled isolation process that protects healthy modules and enables continued operation.
Solution Approach 2:
The system deliberately sacrifices the fuse (a disposable protective element) by melting it to isolate the faulty module. This discarding of the fuse enables recovery of system operation through healthy modules, and the process can be repeated with replaceable fuses without requiring complete system shutdown.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient isolation of faulty converter modules, preventing system-wide failures and allowing continued operation with healthy modules by using fuses to disconnect and reconnect converter modules safely, thereby ensuring reliable power generation.
Implementation Method 1
power is supplied to the converter module in which there is a fault via the fuse associated with the converter module such that the fuse associated with the converter module melts
Data Source
AI summary
According to an embodiment, a power generation system is provided comprising a power generator; a plurality of converter modules, each converter module having a DC link, wherein the DC link of each converter module is connected to the DC links of the other converter modules of the plurality of converter modules via a fuse associated with the converter module; and a controller configured to, if it is detected that there is a fault in one of the converter modules, disconnect the converter module in which there is a fault from the power generator and connect two or more other converters module of the plurality of converter modules to the power generator and to control the power generation system to supply power to the DC links of the two or more other converter modules such that power is supplied to the converter module in which there is a fault via the fuse associated with the converter module such that the fuse associated with the converter module melts.