Power Electronics Master-Slave Role Determination
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Solution Overview
Problem
Existing power electronics systems face challenges in determining the master-slave roles among multiple devices, leading to difficulties in phase synchronization and power allocation, especially during initial installation and abnormal conditions, such as blackouts, which affects operation flexibility and throughput.
Innovation Solution
A power electronics device with a controlling unit, determining unit, and confirming unit that determines and confirms the master-slave relationships based on power characteristic information, ensuring correct operation and synchronization among multiple devices connected via a power line, using communication networks to exchange configuration information and manage power connection relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power electronics devices operate autonomously during initial installation or abnormal conditions, then operation flexibility is maintained, but multiple masters may be established causing synchronization failures and incorrect power allocation
Solution Approach 1:
The system performs preliminary master determination through configuration information exchange before autonomous operation begins. Devices exchange their device IDs and determine master-slave relationships in advance, ensuring a single master is established before power synchronization operations start, thus preventing synchronization failures while maintaining operational flexibility
Solution Approach 2:
The system implements feedback mechanisms where devices continuously exchange configuration information and master determination results. The master device's determination result is fed back to slave devices, and this feedback loop ensures all devices maintain consistent awareness of the master-slave hierarchy, preventing multiple masters from being established
2Reliability
If fixed master/slave roles are assigned using optical communication lines, then phase synchronization is achieved, but operation flexibility is reduced and system complexity increases
Solution Approach 1:
The system dynamically determines master-slave roles based on real-time configuration information exchange rather than using fixed assignments. Devices can adapt their master-slave relationships according to system conditions, maintaining phase synchronization while preserving operational flexibility and reducing system complexity
Solution Approach 2:
Power electronics devices automatically determine their own master-slave roles through internal processing of exchanged configuration information, without requiring external control or complex centralized management systems. This self-service approach reduces system complexity while maintaining synchronization reliability
3Extent of automation
If device information is notified to a server for automatic software setting, then device configuration is automated, but system complexity increases and operation flexibility during abnormalities is reduced
Solution Approach 1:
The patent extracts the master determination function from external servers and implements it directly within the power electronics devices themselves. By taking out the dependency on external server infrastructure, the system achieves configuration automation while reducing overall system complexity and maintaining operational flexibility during server unavailability or abnormal conditions
4Loss of information
If power information is exchanged using communication functions, then accurate power allocation is achieved, but information loss occurs during blackouts or abnormal conditions
Solution Approach 1:
The system prepares for information loss during blackouts by establishing master-slave relationships and configuration information exchange before abnormal conditions occur. This beforehand preparation ensures that even when communication fails during blackouts, the established hierarchical structure allows devices to continue operating with previously determined roles, maintaining operation continuity
Data Source
AI summary
According to some embodiments, there is provided a power electronics device including: a controlling unit, a determining unit, a confirming unit and a determining unit. The controlling unit performs surveillance/control concerning an input/output of power to a power line with other power electronics devices connected via the power line. The determining unit determines a master device which is a subject of the surveillance/control and a slave device which is controlled by the master device, based on power characteristic information of the other power electronics devices from among the other power electronics devices and the power electronics device. The confirming unit confirms whether the master device and the slave device determined by the determining unit are matched with the master device and the slave device determined by the other power electronics devices. The determining unit permits a start of the surveillance/control when matching is determined by the confirming unit.