Off-Grid Area Selection Using Stability Simulation in Power Distribution
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Solution Overview
Problem
Current methods for selecting an off-grid area in a power distribution system are inefficient due to the need for extensive simulation of numerous system topology candidates, leading to long calculation times and potential instability issues, as they do not provide a mechanism for selecting areas that ensure system stability like frequency.
Innovation Solution
An information processing device and method that select an off-grid area based on load capacity and power supply facility information, using a system stability simulation unit to determine compliance with system operation constraints, thereby optimizing the selection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If simulation is performed for all enormous number of system topology candidates to select off-grid area, then selection accuracy considering system stability is improved, but calculation time becomes excessively long
Solution Approach 1:
The patent segments the evaluation process into two distinct stages: (1) an initial screening stage that evaluates candidates based on readily available system configuration information without simulation, and (2) a detailed simulation stage that evaluates only the narrowed-down candidates. This segmentation allows the system to avoid performing computationally expensive simulations on all candidates while still ensuring that the final selection meets stability requirements.
Solution Approach 2:
The patent applies partial action by performing complete simulation evaluation only on a subset of candidates that pass the initial screening, rather than performing full simulation on all candidates. The initial screening uses simplified criteria to filter out obviously unsuitable candidates, allowing the system to achieve adequate selection accuracy with less computational effort.
2Productivity
If optimization calculation is used for area selection, then calculation speed is improved, but system stability cannot be simulated and erroneous selections may occur
Solution Approach 1:
The patent divides the selection process into two functional segments: an optimization calculation segment that rapidly identifies candidate areas based on system configuration, and a simulation verification segment that validates system stability for these candidates. This segmentation allows the system to benefit from both the speed of optimization and the reliability of simulation.
Solution Approach 2:
The patent introduces simulation verification as an intermediary step between optimization calculation and final selection. The simulation acts as a mediator that filters out candidates that fail to meet stability requirements, ensuring that the final selection is both computationally efficient and reliability-assured.
Data Source
AI summary
An off-grid area selection device that selects an area in which an off-grid in a power distribution system having a plurality of switches arranged therein can be constructed, and an off-grid area selection method executed in the off-grid area selection device are configured to select an area in which an off-grid in the power distribution system can be constructed based on each piece of information regarding a load capacity and a power supply facility for each switch section and facility information of the power distribution system, simulate system stability in the selected area, and determine whether or not the area can comply with a system operation constraint of the power distribution system.