Grid Node Load Flow Control for Decentralized Energy Systems
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Solution Overview
Problem
Decentralized energy systems face challenges in efficiently distributing and managing locally generated energy, particularly with the increasing volatility of renewable sources and decentralized consumption, which can lead to grid bottlenecks and stability issues.
Innovation Solution
A control apparatus is used to manage load flows between energy systems via an electrical grid, determining internal controlling power based on grid node conditions and optimizing power distribution to prevent overload, while also considering external controlling power and grid topology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If decentralized energy systems allow local energy exchange without control, then energy autonomy and flexibility are improved, but grid stability and reliability deteriorate due to volatility of renewable sources
Solution Approach 1:
The control apparatus acts as an intermediary between decentralized energy systems and the electrical grid. It receives data from multiple energy systems about their power generation and consumption capabilities, determines appropriate controlling powers to maintain grid stability, and transmits these control signals back to the energy systems. This mediator approach enables local energy autonomy while ensuring overall grid reliability through coordinated control.
2Productivity
If maximum power is allowed to flow through grid nodes, then energy productivity and efficiency are improved, but harmful effects increase due to grid bottlenecks and overload risks
Solution Approach 1:
The control apparatus performs preliminary determination of controlling powers before actual energy distribution occurs. It analyzes data from multiple energy systems about their maximum providable powers and grid boundary conditions, pre-calculates the appropriate controlling powers needed to prevent bottlenecks, and transmits these control signals in advance. This preliminary action prevents grid overload while maintaining efficient energy distribution.
3Reliability
If control apparatus manages all energy systems centrally, then grid stability and reliability are improved, but device complexity and operational difficulty increase
Solution Approach 1:
The control apparatus segments the control task by determining controlling powers for each grid node independently based on local boundary conditions and data from connected energy systems. Rather than managing all systems as a single complex entity, it processes control decisions in a distributed manner across multiple grid nodes, simplifying the overall control architecture while maintaining system-wide stability.
Data Source
AI summary
Various embodiments include a method for controlling load flows between multiple energy systems via an electrical grid using a control apparatus common to the energy systems. Each of the energy systems can provide a power associated with a load flow at a grid node. The method may include: ascertaining first powers scheduled for the load flows using data from the energy systems, including information about a maximum power providable at the respective grid node by the respective energy system; determining an internal controlling power to the electrical grid and resolved with respect to the grid nodes on the basis of the ascertained scheduled first powers and grid boundary conditions provided for the electrical grid; taking account of the controlling power determined at the grid node by reducing or increasing the maximum powers providable at that grid node by the energy systems; ascertaining scheduled second powers on the basis of the reduced or increased maximum providable powers; and controlling the load flows according to the ascertained second powers.