Adaptive DC/DC PWM Mode Switching for Fast Grid Response
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Solution Overview
Problem
Existing DC/DC converters fail to provide both rapid responsivity and energy-efficient operation under diverse operating conditions, particularly in dynamic grid support applications.
Innovation Solution
An adaptive DC conversion system that includes a multi-mode DC converter circuit with two or more power switches, operable in multiple PWM modes based on different PWM signal sets, and a PWM controller that dynamically selects the appropriate PWM mode for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple power switches are operated with complementary PWM signals to provide high responsivity, then the system achieves rapid responsivity for dynamic grid support operations, but energy consumption increases
Solution Approach 1:
The system dynamically switches between single PWM mode and complementary PWM mode based on operating conditions. The PWM controller selects the appropriate mode to match the current operational state, enabling the system to achieve high responsivity when needed (DGS operations) while conserving energy during standard operations, thus resolving the contradiction between speed and energy consumption
Solution Approach 2:
The system changes the operational parameters of the power switches by switching between different PWM modes. In single PWM mode, only one switch is modulated for energy efficiency, while in complementary PWM mode, both switches are modulated with complementary signals for high responsivity. This parameter change allows the system to adapt to different operational requirements
2Device complexity
If a single PWM mode is used to simplify the control system, then the device complexity is reduced, but the system cannot provide both rapid responsivity and energy-efficient operation under diverse conditions
Solution Approach 1:
The control system is designed to perform multiple functions by supporting both single PWM mode and complementary PWM mode operations. The PWM controller can selectively activate different power switches based on the required operational state, making the system universal enough to handle both energy-efficient standard operations and high-responsivity DGS operations without requiring separate control systems
Data Source
AI summary
An adaptive direct current (DC) conversion system may include a multi-mode DC converter circuit including two or more power switches, where the multi-mode DC converter circuit is operable in two or more pulse width modulation (PWM) modes based on two or more PWM signal sets provided to the two or more power switches. The system may further include a PWM controller, where the PWM controller controls which of the two or more PWM modes the multi-mode DC converter circuit operates in by providing the multi-mode DC converter circuit with the associated one of the two or more PWM signal sets.