Decentralized Oscillator Control for DC-DC Converter Interleaving
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Solution Overview
Problem
Centralized switch interleaving techniques are inadequate for modular plug-and-play systems, such as microgrids, as they fail to provide system-wide interleaving without communication, leading to inefficiencies in power provision and reliability.
Innovation Solution
The implementation of decentralized control techniques using locally executed nonlinear oscillator circuits to generate PWM carrier waveforms, allowing each converter to use local measurements for switch interleaving, resulting in fully decentralized interleaving and plug-and-play functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized switch interleaving techniques are used, then system-wide interleaving can be achieved, but communication infrastructure and system complexity are required
Solution Approach 1:
The centralized control function is segmented and distributed to individual converter units. Each converter now contains its own oscillator circuit that generates switching signals independently, eliminating the need for centralized communication infrastructure while maintaining interleaving functionality through local autonomous operation
Solution Approach 2:
Each converter unit serves itself by generating its own switching signals through local oscillator circuits. The converters autonomously establish uniform phase-spacing relationships with other converters without requiring external communication or coordination, achieving self-organized interleaving
2Adaptability or versatility
If modular plug-and-play configuration is implemented, then system adaptability is improved, but decentralized control capability is reduced
Solution Approach 1:
The system dynamically adapts to modular configurations through autonomous oscillator-based control. Each converter's oscillator naturally synchronizes with others upon connection, automatically establishing uniform phase relationships regardless of the number or configuration of modular units, enabling plug-and-play operation with full decentralized control
Solution Approach 2:
The oscillator-based control mechanism provides universal decentralized control functionality across all converter types and configurations. The same local control architecture works for any number of parallel converters, making the system universally adaptable to different modular plug-and-play arrangements while maintaining autonomous operation
Data Source
AI summary
A device includes a control unit that includes an oscillator circuit. The control unit is configured to generate, based on the oscillator circuit, at least one switching signal. The device also includes a direct current (DC)-to-DC conversion circuit comprising at least one electronic switch that is operatively coupled to the control unit. The DC-to-DC conversion circuit is configured to convert, based on the at least one switching signal, a DC input voltage to a DC output voltage, and the control unit is further configured to input, to the oscillator circuit, a current signal that is generated based on a measured output current of the DC-to-DC conversion circuit.