Abstract
For the planning of the guaranteed power grid, only the operation capacity of the target grid is considered. The recovery process and steps of the backbone grid are not considered enough, which leads to two defects: the minimum guaranteed power grid is not conducive to the unit recovery and the recovery time is too long. In this paper, a method of constructing the grid with the specific recovery process is proposed. Considering the influence of the grid structure and the position of the black start power supply on the recovery steps, the recovery success rate and the recovery time of the grid, the optimization of the grid structure of the guaranteed grid can meet the demand of power supply and at the same time make the recovery of the target grid less time-consuming and achieve a higher recovery success rate in the event of a blackout. In this method, two aspects are considered: the power failure recovery scenario in the recovery process of the target grid and the normal power supply scenario, reflecting the power supply performance after the recovery of the target grid. In the normal power supply scenario, a three-objective optimization model including power supply capacity, smooth transmission and safety margin is constructed, with power supply capacity and safe operation as constraints. In the scenario of power failure recovery, the process of power grid recovery and the mechanism affecting the success of recovery are analyzed to form the line recovery index. The Dijkstra algorithm is used to search for the optimal recovery path and calculate the recovery index, so as to reoptimize the backbone power grid. The validity of the method is verified by standard and practical examples.
Highlights
At present, the construction of the guaranteed power grid for strengthening the important load power supply is an important issue in typhoon-prone areas, ice waterlogging and heavy load concentrated areas along the coast [1]
In this paper, combined with the specific recovery process leading to recovery failure and the key factors determining the recovery time, we extract quantitative indicators for optimization planning and optimize the backbone grid structure of the bottom guaranteed grid, to make the recovery operation less prone to fail after a blackout and reduce the time consumed by the grid from the blackout to the recovery of power supply
The construction of the core backbone grid structure of the minimum guaranteed power grid is considered from two aspects: the normal power supply scenario and the power failure recovery scenario
Summary
The construction of the guaranteed power grid for strengthening the important load power supply is an important issue in typhoon-prone areas, ice waterlogging and heavy load concentrated areas along the coast [1]. In this paper, combined with the specific recovery process leading to recovery failure and the key factors determining the recovery time, we extract quantitative indicators for optimization planning and optimize the backbone grid structure of the bottom guaranteed grid, to make the recovery operation less prone to fail after a blackout and reduce the time consumed by the grid from the blackout to the recovery of power supply. In this way, we can guarantee the power supply of important loads more comprehensively. Based on the normal scene optimization model, this paper analyzes the recovery steps and key factors, quantifies the recovery time and the recovery success rate of the grid, increases the recovery index, optimizes the conventional multi-objective backbone grid optimization scheme, improves the recovery success rate and shortens the recovery time
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
