Microgrid Controller for EV Charging Load Management
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Solution Overview
Problem
Current utility systems face challenges in managing variable loads, particularly with the increasing power demands from electric vehicle chargers, leading to potential power outages and inefficiencies due to reliance on centralized and unreliable power sources, and lack of environmental sustainability.
Innovation Solution
An on-site integrated energy power and electric vehicle (EV) charging system that includes multiple power sources, a digital control module for real-time power distribution, and a hierarchical power management system to optimize power delivery to buildings and EV chargers, using redundant power sources and considering historical data, weather, and temperature for efficient load management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electric vehicle chargers are added to a location, then power needs at the location increase, but the offsite on-grid utility cannot cope with frequency fluctuations
Solution Approach 1:
The system segments the power management into multiple independent components: a microgrid controller that manages local generation, energy storage systems, and controllable loads separately from the utility grid. This segmentation allows the microgrid to handle frequency fluctuations locally without affecting the broader grid stability.
Solution Approach 2:
The microgrid controller acts as an intermediary between the utility grid and the local power consumers. It buffers frequency fluctuations by using local energy storage and generation resources, preventing direct transmission of grid instability to EV chargers and other loads.
2Device complexity
If centralized power sources are used, then power generation is simplified, but the system becomes inefficient and unreliable
Solution Approach 1:
The system divides power generation into multiple distributed sources including solar panels, wind turbines, and other renewable generators located throughout the microgrid. This segmentation eliminates reliance on a single centralized source, providing redundancy and improving reliability while maintaining manageable complexity through automated control.
Solution Approach 2:
The microgrid controller dynamically changes operational parameters of various power sources based on real-time conditions. It adjusts the output mix of different generators, storage discharge rates, and load management strategies to optimize efficiency and reliability under varying conditions.
3Reliability
If offsite on-grid utility is relied upon, then infrastructure maintenance is required, but costs for businesses increase
Solution Approach 1:
The microgrid enables businesses to generate their own power through on-site renewable energy systems and store excess energy locally. This self-service capability reduces dependence on external utility infrastructure, eliminating or reducing the need to pay for infrastructure maintenance and providing protection against rising utility costs.
4Ease of operation
If current utility systems are used, then power distribution is straightforward, but they cannot manage variable loads from EV chargers
Solution Approach 1:
The microgrid controller implements dynamic load management that automatically adjusts power distribution in real-time based on EV charger demands, available generation, and storage capacity. This dynamic approach allows the system to handle highly variable loads from EV charging while maintaining stable operation and simple user interaction.
Data Source
AI summary
There is provided an on-site integrated energy power and electric vehicle (EV) charging system. The system includes a plurality of power loads. The plurality of power loads includes at least a first building and an electric charger module including at least a first EV charger for charging an electric vehicle when coupled to the EV charge. The system also includes at least a first power source to provide power to the plurality of power loads and a digital control module (DCM) power distribution system.