MEUP Tracking Decouples Energy Extraction from Demand
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Solution Overview
Problem
The 'blind MPPT' practice in green energy systems, which forces the system to operate at the maximum power point voltage, is suboptimal as it fails to match energy extraction and delivery efficiencies with power demand, leading to inefficient energy utilization and high energy losses, with typical efficiencies below 30% despite advertised high efficiencies.
Innovation Solution
The solution involves tracking the maximum energy utilization point (MEUP) instead of the maximum power point, decoupling energy production and extraction, and using surplus energy storage and regulation to optimize energy delivery and match load demands, thereby improving energy extraction and delivery efficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the system operates at the maximum power point voltage (blind MPPT practice), then the power production is maximized, but the energy utilization efficiency deteriorates due to mismatch with extraction device characteristics and power demand
Solution Approach 1:
The system dynamically adjusts the operating voltage away from the fixed maximum power point to track the time-varying maximum energy utilization point. The controller continuously monitors power demand and extraction device characteristics, adjusting the operating point to maintain optimal energy utilization efficiency under changing conditions.
Solution Approach 2:
The invention changes the control parameter from fixed maximum power point voltage to variable maximum energy utilization point voltage. By modifying the operating voltage based on real-time power demand and extraction device characteristics, the system achieves better energy utilization efficiency while maintaining adequate power production.
2Device complexity
If the system forces operation at MPPP voltage to simplify control, then the control complexity is reduced, but the energy extraction efficiency and delivery efficiency deteriorate due to mismatch with device characteristics
Solution Approach 1:
The system implements feedback control by continuously monitoring power demand, extraction device characteristics, and current operating conditions. The controller uses this feedback information to adjust the operating voltage and maintain optimal energy utilization, achieving high extraction efficiency without excessive control complexity.
Solution Approach 2:
The system enables the energy system to self-adjust its operating point based on internal conditions and external demand. The controller automatically tracks the maximum energy utilization point by monitoring system parameters, eliminating the need for complex external optimization while maintaining high efficiency.
3Loss of energy
If the system decouples energy production and extraction with surplus energy storage, then the energy utilization efficiency is improved, but the device complexity increases due to additional storage and regulation components
Solution Approach 1:
The system performs preliminary energy storage by capturing surplus energy when production exceeds demand. The energy storage component is charged in advance during high-production periods, preparing energy for later use when demand exceeds production, thereby smoothing out mismatches and improving overall utilization efficiency.
Solution Approach 2:
The energy storage component acts as an intermediary between production and consumption. It buffers the mismatch between time-varying power production and power demand, allowing the system to decouple these functions while maintaining high energy utilization efficiency through regulated energy delivery.
Data Source
AI summary
When one operates an energy system at its maximum energy utilization point (MEUP) consistently, one can receive the most amount of energy benefit from the system. The practical MEUP tracking technologies operate a generator at a voltage for maximum power extraction and to produce near-maximum power; incorporate the invented surplus energy extraction devices to near-perfectly extract all power generated; temporarily store the surplus energy into designed energy reservoirs; add the invented supply devices to combined the energy from the extractor and from the reservoirs; prepare and deliver the right amount of power to exactly satisfy the instantaneous demand. Thus effectuates finding and tracking the MEUP of the energy system.