Dynamic Switching Scheme Selection for Power Regulation
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Solution Overview
Problem
The increasing complexity of bidirectional AC-DC conversion in microgrids poses challenges in power flow control, power sharing, converter interactions, fault interruption, and power quality, especially under stiff and weak grid conditions, as the integration of AC and DC systems becomes more prevalent.
Innovation Solution
A system and method for controlling a switching network in a power regulation circuit that dynamically selects switching schemes based on power characteristics and reference signals to regulate power transfer between AC and DC circuits, using controllers to manage switches and generate output signals for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bidirectional AC-DC converters are interlinked to form microgrids, then power supply continuity and system reliability are improved, but device complexity and control difficulty increase significantly
Solution Approach 1:
The patent segments the complex bidirectional AC-DC converter system into multiple independent unidirectional converters, each controlled by dedicated controllers. This segmentation allows each converter to operate independently while contributing to the overall microgrid power supply continuity, reducing the control complexity of the entire system while maintaining reliability.
Solution Approach 2:
The patent designs universal controllers that can manage multiple unidirectional converters with similar control algorithms. This multi-functionality approach allows the same control strategy to be applied across different converter configurations, simplifying the overall control architecture while maintaining system reliability through redundant pathways.
2Productivity
If multiple switching schemes are used for power regulation, then power transfer efficiency and adaptability improve, but control complexity increases
Solution Approach 1:
The patent implements dynamic switching scheme selection where controllers automatically choose the most appropriate switching scheme based on real-time power flow conditions, voltage levels, and load requirements. This dynamic adaptation optimizes power transfer efficiency across varying operating conditions while the automated selection process prevents control complexity from becoming unmanageable.
Solution Approach 2:
The patent changes switching scheme parameters (such as switching frequency, duty cycle, and topology configuration) based on operating conditions to optimize power transfer efficiency. By adjusting these parameters dynamically rather than using fixed switching schemes, the system achieves high efficiency across different power transfer scenarios without requiring completely different control systems for each mode.
Data Source
AI summary
A system for controlling a switching network of a power regulation circuit arranged to regulate power transfer between a first and second circuit connected with the power regulation circuit includes one or more controllers receiving one or more first signals indicative of power characteristics of the first circuit and one or more second signals indicative of power characteristics of the second circuit. The controllers determine, based on the received signals and reference signals, a required power output for regulating power transfer between the first and second circuit, and then select, dynamically, a switching scheme, from predetermined switching schemes, based on the determination result. The predetermined switching schemes represent unique switching schemea for controlling switching of respective switches of the switching network. The controllers generate, based on the dynamically selected switching scheme, output signals for controlling switching of respective switches to regulate power transfer between the first and second circuit.