Parallel Power Module Synchronization via Dominating Clock Signal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current real-time monitoring and management systems for power grids lack the flexibility to individually modulate the output power of each module in parallel frequency converters, leading to reduced power grid modulation flexibility and increased complexity when adding more modules to adjust for varying loads.
Innovation Solution
A real-time monitor and management system that designates a dominating module to send a synchronous clock signal to subordinating modules via an eCAN BUS, allowing for synchronized phase and voltage reference, and uses an automatic modulation device to adjust overall power output based on the number of modules connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If more parallel modules are added to elevate power grid capacity, then the power output capacity is improved, but the connection and power modulation complexity increases
Solution Approach 1:
The system divides the power grid into multiple independent parallel modules, each capable of autonomous operation. This segmentation allows the system to scale capacity by simply adding modules without increasing overall system complexity, as each module operates independently with standardized interfaces.
Solution Approach 2:
Each parallel module is designed with universal functionality to perform the same power conversion and modulation tasks. This multi-functionality ensures that all modules can be controlled using the same modulation signals and protocols, simplifying the power modulation architecture despite the increased number of modules.
2Device complexity
If each frequency converter operates independently, then the system simplicity is improved, but the overall power modulation flexibility is reduced
Solution Approach 1:
The system implements feedback mechanisms where each module monitors its own operation and receives modulation commands from a central controller. This feedback loop enables the independently simple modules to collectively achieve flexible power modulation, as each module adjusts its output based on real-time system requirements communicated through the feedback channel.
Solution Approach 2:
The system transitions from static independent operation to dynamic coordinated operation. Each module maintains its simple independent structure but dynamically adjusts its parameters based on real-time modulation signals, enabling the overall system to achieve high power modulation flexibility while preserving individual module simplicity.
3Speed
If a synchronous clock signal is generated inside the system, then the PWM synchronization is improved, but the circulation current from power switch increases
Solution Approach 1:
The system introduces an external synchronous clock signal as an intermediary to coordinate all power switches across parallel modules. This external reference signal acts as a mediator that synchronizes PWM operations without requiring complex internal signal generation, thereby reducing circulating currents caused by phase mismatches while maintaining high synchronization speed.
Data Source
AI summary
A power monitor and management system includes an automatic modulation device, a monitoring device, multiple modules and an LAN (local area network) connected to the monitoring device and the modules to enable the monitoring device to communicate with the modules. The automatic modulation device determines a dominating module in according to registration sequences of the modules and subordinating modules and to modulate power of the dominating module and the subordinating modules as well as the overall power output in accordance with number of the modules.