DC Power Node Control Using Usage Profiles
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Solution Overview
Problem
In power supply systems that interchange direct-current power between nodes, determining a suitable target node for power transmission or reception becomes challenging as the number of connected nodes increases, leading to potential voltage instability and incorrect power transmission.
Innovation Solution
A control device with a power control unit that determines a node for transmission or reception of direct-current power using profile information about each node's power usage state, allowing flexible selection of target nodes based on their power generation, usage, and storage capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of connected nodes in a power supply system increases to enable more power interchange, then the system's power supply capability and versatility improve, but determining suitable target nodes becomes more difficult and voltage instability may occur
Solution Approach 1:
The control device acquires profile information from each node (including power generation amount, power usage amount, and storage battery state) and uses this feedback information to automatically determine suitable target nodes for power transmission or reception. This feedback mechanism resolves the contradiction by enabling intelligent decision-making in multi-node systems, preventing voltage instability while maintaining versatility.
Solution Approach 2:
Each node autonomously manages its own profile information (power generation, usage, and storage battery state), and the control device uses this self-reported information to determine target nodes. This self-service approach simplifies the determination process in multi-node systems by relying on nodes' own data rather than complex centralized monitoring.
2Measurement precision
If the control device uses detailed profile information of all nodes to determine target nodes, then the accuracy of target node selection improves, but the system complexity and information processing load increase
Solution Approach 1:
The control device extracts only the necessary profile information elements (power generation amount, power usage amount, and storage battery state) from each node to determine target nodes. By extracting only the essential data needed for target node determination rather than processing all possible node information, the system achieves accurate selection while maintaining simplicity.
3Productivity
If the system automatically determines target nodes using profile information, then the productivity and efficiency of power interchange improve, but the risk of voltage instability and incorrect power transmission increases
Solution Approach 1:
The control device acquires and stores profile information from each node in advance before power interchange operations begin. This preliminary action of gathering necessary information (power generation, usage, and storage battery state) ensures that when target node determination is needed, the data is already available, enabling efficient automated selection while maintaining reliability through informed decision-making.
Data Source
AI summary
To effectively determine premises as a counterpart for transmission or reception of power in a case of interchanging direct-current power between respective premisesA control device (110) according to the present invention includes a power control unit (114) configured to determine a node that performs transmission or reception of direct-current power to or from an own node by using profile information indicating a power usage state of each of the nodes exchanging direct-current power with each other.