Modular Power Conversion System for Distributed Grid Integration
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Solution Overview
Problem
The electrical grid faces challenges in efficiently managing and integrating distributed power generation from various sources, such as wind, solar, and diesel generators, into a flexible smart grid system, leading to inefficiencies in power distribution and potential for under- or over-generation.
Innovation Solution
A modular power conversion system with interchangeable modules that connect different power sources and loads, using power electronics and software to manage power flow, prioritize renewable energy, and optimize voltage set-points for efficient energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed power generation from various sources is integrated into the grid, then power generation diversity and renewable energy utilization are improved, but system complexity and difficulty of managing power flow increase
Solution Approach 1:
The system divides the complex power management task into modular functional blocks: power conversion modules for individual generators, a central controller for coordination, and communication interfaces for data exchange. Each module handles specific functions independently, making the overall system manageable despite handling multiple generator types.
Solution Approach 2:
The controller is designed to universally manage multiple types of power generators (wind, solar, diesel, hydro) through a unified interface and control algorithm. The system uses standardized communication protocols and power conversion topologies that can accommodate different generator types without requiring separate dedicated control systems for each.
2Productivity
If traditional grid structure is used, then power transmission and distribution are simplified, but efficiency in managing dispersed power generation is reduced
Solution Approach 1:
The system dynamically adjusts power flow distribution based on real-time conditions at each generator and load. The controller continuously monitors generator output, load demands, and system state, then dynamically reconfigures power routing to optimize efficiency. This dynamic adaptation allows the system to handle dispersed generation while maintaining high distribution efficiency.
3Loss of energy
If voltage set-points are optimized for each module, then power conversion efficiency is improved, but control complexity increases
Solution Approach 1:
The controller implements feedback control by continuously monitoring the actual DC bus voltage and comparing it with the optimized set-point. Based on the voltage error, the controller adjusts the power conversion modules to maintain optimal operating conditions. This feedback mechanism automatically maintains high efficiency without requiring complex manual control adjustments.
Solution Approach 2:
The system optimizes power conversion efficiency by dynamically adjusting voltage set-points as controllable parameters. The controller calculates and applies optimized voltage levels for each power conversion module based on operating conditions, generator characteristics, and load requirements, thereby minimizing energy losses during conversion.
Data Source
AI summary
A modular power conversion system and power electronics enabling any power production device or entity to connect to any load or electrical grid including, but not limited to, electricity conversion between low level producer(s) such as a diesel or gas generator, Stirling engine, wind turbine or photovoltaic array, to a consumer such as a commercial or residential building, either directly or via the grid, is disclosed. The modular power conversion system including hardware and software power electronics designed as a modular power stage aggregating different power production entities, transmission systems, consumption and loads as well as energy storage is also disclosed.