Parallelization Method for Black-Start Subsystems
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Solution Overview
Problem
Current power grid black-start research schemes focus on individual subsystems and lack effective parallelization methods, leading to prolonged blackout times and social impacts, as they do not adequately address the restoration of the main network structure or provide sufficient calculation checks for parallelization between subsystems.
Innovation Solution
A parallelization method for black-start subsystems with external support, which involves partitioning the grid, performing stability checks, determining available parallel paths, and sequencing the parallelization process based on voltage levels and stability levels to ensure successful and efficient restoration of the power grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subsystems are restored independently using internal or external black-start power sources, then each subsystem can be restored, but the overall restoration time is prolonged and the main network structure cannot be restored efficiently
Solution Approach 1:
The patent merges multiple independently restored subsystems into a unified parallelized restoration process. By establishing parallel paths between subsystems and coordinating their black-start operations, multiple subsystems are restored simultaneously rather than sequentially, significantly reducing total restoration time and enabling faster recovery of the main network structure.
Solution Approach 2:
The patent segments the power grid into multiple subsystems that can operate independently during black-start but are then coordinated through parallelization. This segmentation allows each subsystem to be restored using its own black-start power source while maintaining the capability for parallel operation, thus improving overall restoration efficiency without compromising individual subsystem independence.
2Reliability
If parallelization between subsystems is not implemented, then individual subsystem restoration can be completed, but the success rate of black-start operations is reduced and risks are increased
Solution Approach 1:
The patent implements feedback mechanisms through stability checks and voltage calculations that monitor the state of each subsystem during black-start operations. This feedback allows for real-time assessment of parallelization feasibility and enables dynamic adjustment of restoration strategies, thereby increasing the success rate of black-start operations and reducing associated risks.
Solution Approach 2:
The patent performs preliminary stability checks and voltage calculations before establishing parallel paths between subsystems. This preliminary action ensures that parallelization is only implemented when conditions are favorable, preventing unstable operations and reducing black-start risks while maintaining high success rates.
3Measurement precision
If comprehensive stability checks and voltage calculations are performed for parallelization, then available parallel paths can be identified, but the complexity of the black-start process increases
Solution Approach 1:
The patent applies stability checks and voltage calculations selectively to specific subsystems and parallel paths based on their individual characteristics and restoration needs. Rather than uniformly applying complex calculations to all subsystems, the method focuses computational resources on critical parallelization points, thereby maintaining high identification accuracy while reducing overall process complexity.
Data Source
AI summary
The invention relates to a parallelization method for black-start subsystems of a power grid with external support, which includes, after power blackout, partitioning the power grid into subsystems, and respectively performing black-start on the subsystems based on a power grid black-start research scheme, performing stability check on each subsystem, performing voltage calculation on parallel lines between the subsystems, checking the parallelizing simulation of the subsystems, and determining a feasible parallelizing path and a recommendable charging direction. The method further includes, starting from the subsystems having external support and higher stability, networking them with an external power grid, parallelizing the networked subsystems having external support to obtain a subnet of the subsystems, parallelizing subsystems having no external support with the subnet of the subsystems to obtain a regional subnet, and finally parallelizing the remaining subsystems with the regional subnet to implement parallelization of black-start subsystems of the whole power grid.