Renewable Plant Energy Accumulator Control for Multi-Service Optimization
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Solution Overview
Problem
Energy accumulator systems in renewable plants are typically designed for single functionalities, leading to underutilization due to variable production costs dependent on wind or solar resources, resulting in financial inefficiency as they are often gauged for the worst production conditions and cannot dynamically adjust to provide multiple services efficiently.
Innovation Solution
A control process utilizing a single energy accumulator unit that dynamically assigns capacity for simultaneous provision of capacity sale, energy sale, and stabilization services based on weather forecasts, real-time market values, and production predictions, allowing for real-time adjustments and optimization of energy transfer between off-peak and peak hours, and reactive power support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single energy accumulator unit is used for multiple services, then the efficiency and output of electrical installations is maximized, but the complexity of control and capacity allocation increases
Solution Approach 1:
The patent applies multi-functionality by enabling a single energy accumulator unit to provide multiple services including capacity sale services, energy sale services, and stabilization services. The control unit dynamically allocates the accumulator's capacity among these different services based on operating conditions, weather forecasts, and market prices, allowing one device to perform multiple functions that would traditionally require separate systems
Solution Approach 2:
The patent implements dynamics through the control unit that continuously adjusts the capacity allocation of the energy accumulator based on real-time operating conditions, weather forecasts, and market prices. The system transitions between different service modes dynamically, optimizing the balance between capacity services, energy services, and stabilization functions according to changing conditions throughout the day
2Productivity
If the accumulator capacity is allocated dynamically based on weather forecasts and market prices, then the financial efficiency is optimized, but the measurement and prediction precision requirements increase
Solution Approach 1:
The patent applies preliminary action by using weather forecasts to predict future production and by pre-calculating optimal capacity allocations for different services based on forecasted market prices. The control unit prepares allocation strategies in advance based on predicted conditions, allowing the system to proactively optimize financial returns rather than merely reacting to current conditions
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring actual production, actual market prices, and actual service deliveries, then using this information to refine and adjust capacity allocations. The control unit compares predicted versus actual outcomes and optimizes future allocations based on this feedback loop, improving prediction accuracy over time
Data Source
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AI summary
It allows simultaneously providing capacity sale services (e.g. frequency regulation or voltage regulation), energy sale services (energy transfer from off-peak hours to peak hours), and stabilization services of a renewable plant, said process comprising the following stages: determining the values of energy quantity to be produced by the plant during a near future time interval; introducing these values of energy quantity, in the control unit; generating an hourly programme of energy supply to be provided by the energy accumulator unit to the network, and depending on the values of energy to be produced, which: stabilizes the power supplied by the plant to the network; regulates the frequency and the voltage of the network, and transfers the energy between off-peak hours and peak hours, or from hours with saturation of the network to hours without saturation.