Hub Device Solar Energy Demand Management
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Solution Overview
Problem
Uncontrolled solar generation capacity can lead to grid stability issues due to rapid changes in energy supply, necessitating restrictions on feed-in tariffs, as existing solar installations lack the ability to manage energy demand effectively.
Innovation Solution
A hub device that controls the power state of appliances and energy storage to optimize the use of solar energy, shifting energy demand and managing energy flow to minimize grid exports and reduce overall electricity costs by utilizing solar energy when available and storing excess for later use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solar generation capacity is increased to reduce fossil fuel use and lower electricity costs, then renewable energy penetration and consumer savings improve, but grid stability deteriorates due to uncontrolled rapid changes in generation capacity
Solution Approach 1:
The hub device continuously monitors solar generation output and household demand, using this feedback to dynamically control appliance power states. This closed-loop control enables the system to adapt to changing solar availability while maintaining grid stability by preventing uncontrolled feed-in variations.
Solution Approach 2:
The system dynamically adjusts appliance operation based on real-time solar generation conditions. By making the load flexible rather than fixed, the system can absorb solar generation variability, allowing high renewable penetration while maintaining stable grid operation through adaptive demand management.
2Loss of energy
If solar installations are allowed to feed-in electricity to the grid without control, then consumer savings from feed-in tariffs improve, but grid stability worsens due to rapid uncontrolled changes in generation capacity
Solution Approach 1:
The hub device pre-cools or pre-heats spaces, pre-heats water, or completes appliance cycles during periods of high solar generation before demand increases. This preliminary action allows the system to maximize utilization of excess solar energy for consumer benefit while preventing uncontrolled feed-in to the grid, thereby maintaining grid stability.
Solution Approach 2:
The system autonomously manages its own energy consumption by automatically adjusting appliance operation based on solar availability. This self-service capability eliminates the need for external grid control mechanisms, allowing consumers to maximize their own solar energy utilization while inherently preventing destabilizing feed-in patterns.
3Reliability
If the hub device controls appliances to match solar supply with demand, then grid stability improves, but device complexity increases
Solution Approach 1:
The hub device performs multiple functions: monitoring solar generation, tracking household demand, controlling multiple appliance types, and optimizing energy utilization. By consolidating these diverse control functions into a single multi-functional device, the system achieves grid stability without proportionally increasing overall system complexity.
Data Source
AI summary
A hub device controls an electrical energy state of one or more appliances, and controls an alternative electricity supply such as a solar generation installation whose output is non-constant such that sometimes the electrical energy available from the alternative electrical supply is greater than the electrical energy demand from the appliances, and at other times the electrical energy available from the alternative electrical supply is less than the electrical energy demand from the appliances. The hub device may control the alternative electricity supply and/or the appliances such that the electrical energy available from the alternative electrical supply is matched to the electrical energy demand from the appliances.