Three-phase Power Converter Load Adjustment Controller
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Solution Overview
Problem
Three-phase power management systems employing parallel power converters often face reliability issues due to imbalances in electrical current across phases, which can lead to potentially harmful situations if not adequately managed.
Innovation Solution
A load adjustment controller that actively manages load sharing between parallel single-phase power converters by generating control signals based on received load sharing criteria metrics, adjusting output voltages to balance electrical current across phases and prevent overloads, using processing units to execute instructions and adjust loads dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If parallel power converters are used to transmit three-phase power, then power transmission capability is improved, but reliability deteriorates due to current imbalance across phases
Solution Approach 1:
The controller continuously monitors the electrical current on each phase and uses this feedback to dynamically adjust the load on parallel power converters. When current imbalance is detected, the controller modifies the operation of individual converters to redistribute load and achieve current balance across all phases, thereby maintaining reliability while utilizing parallel converter capability
Solution Approach 2:
The system dynamically adjusts the load distribution among parallel power converters based on real-time current measurements. The controller modifies the operational parameters of each converter adaptively, changing which converters are active and their respective load contributions to maintain current balance across phases under varying operating conditions
2Device complexity
If load sharing is not actively managed, then device complexity is reduced, but harmful factors increase due to potential overloads
Solution Approach 1:
The parallel power converter system performs self-diagnosis and self-adjustment through automated controller monitoring and control. The system autonomously detects current imbalances and adjusts converter loads without requiring external intervention or complex manual control mechanisms, achieving protective functionality with minimal added complexity
Solution Approach 2:
The controller acts as an intermediary between the parallel power converters and the load, mediating the distribution of power and managing current balance. This intermediary component coordinates the operation of multiple converters, ensuring safe load distribution while maintaining relatively simple individual converter designs
Data Source
AI summary
A sharing criteria metric is received for each of three phases of a three-phase power. Loads on power converters receiving the three phase power are adjusted based on the sharing criteria metric of each of the three phases.