Power Electronics Control Device Master-Slave Configuration
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Solution Overview
Problem
In distributed power systems, determining and maintaining a master-slave configuration among power electronics devices is challenging, especially during initial installation, abnormalities, or when devices are added or removed, leading to operational inefficiencies and potential multiple masters in the system.
Innovation Solution
A control device with a controller, configuration determiner, and manager is used to dynamically determine and adjust the logical configuration of power electronics devices, allowing for consistent master-slave relationships through information exchange and shared algorithms, ensuring system availability during changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power electronics devices operate independently and determine master/slave roles automatically, then operational flexibility is maintained, but multiple masters may exist in the system causing control conflicts
Solution Approach 1:
The patent implements a preliminary action by establishing a logical configuration determination mechanism before power conversion operations begin. The configuration determiner identifies which device should be the master based on device information exchanged among all devices, ensuring that only one master is designated before coordinated control starts. This prevents the problem of multiple masters existing simultaneously while maintaining operational flexibility.
2Stability of the object's composition
If master/slave roles are fixed among power electronics devices, then control stability is improved, but system adaptability to device additions or failures deteriorates
Solution Approach 1:
The patent applies dynamics by making the master/slave configuration dynamic rather than fixed. The configuration determiner continuously monitors device status and can reassign master/slave roles based on current system conditions, device additions, or failures. This allows the system to maintain control stability through consistent logical configuration while adapting to changing system composition.
Solution Approach 2:
The patent implements feedback through the manager that monitors the operational status of power electronics devices and provides this information to the configuration determiner. When device status changes (additions, failures, or removals), the feedback mechanism triggers a re-evaluation of the logical configuration, enabling the system to adapt while maintaining control stability.
3Reliability
If power electronics devices exchange information to determine logical configuration, then consistent master-slave relationships are achieved, but communication overhead and system complexity increase
Solution Approach 1:
The patent segments the configuration determination process into distinct functional modules: a configuration determiner that processes device information and a manager that handles communication coordination. This segmentation allows information exchange to be structured and efficient, reducing communication overhead while ensuring consistent configuration determination across all devices.
Data Source
AI summary
According to one embodiment, a control device in a power electronics device includes a controller, a configuration determiner and a manager. The controller performs control associated with power conversion, in accordance with a first logical configuration of control between the power electronics device and other power electronics device. The configuration determiner performs determination processing of a second logical configuration when a change condition of the first logical configuration is satisfied. The manager instructs the controller to perform the control in accordance with the second logical configuration, the manager performing management such that the controller performs the control in accordance with previously given control information for a period after the change condition of the first logical configuration is satisfied and until the manager instructs the controller to perform the control associated with the power conversion in accordance with the second logical configuration.