Node standby capacity rapid evaluation method based on invariable node power failure risk

Abstract

The invention discloses a node standby capacity rapid evaluation method based on node power failure risk invariance, and the method comprises the steps: calculating the difference between the connectivity of each load node and the critical connectivity of each load node, and evaluating the node power failure risk in a normal operation state; evaluating a node power failure risk in each anticipated operation scene; screening out a scene combination having an influence on the power failure risk of the target load node, and screening out a scene with the maximum node connectivity reduction amplitude; and recovering the node power failure risk to the node power failure risk in a normal operation state through a means of reducing the node equivalent load by load response, thereby determining the standby capacity required to be provided by the node load response. According to the node standby capacity rapid evaluation method based on the invariable node power failure risk, the accident standby capacity of each load node can be rapidly calculated under the condition that the node power failure risk is invariable, and the feasibility that the node takes the load response as the accident standby to participate in the standby service is improved.

Description

technical field [0001] The invention relates to the technical field of power system power outage reserve capacity calculation, in particular to a method for rapidly evaluating node reserve capacity based on constant node power outage risks. Background technique [0002] In order to ensure the safe and stable operation of the power system and sufficient power supply reliability, it is usually necessary to reserve a certain amount of operating reserve capacity to deal with possible load fluctuations and system failures. This part of the reserve capacity is called load reserve (used to cope with load fluctuations). reserve capacity) and emergency reserve (reserved for dealing with system failures). [0003] Reserve capacity based on load response With large-scale renewable energy generation entering the grid, the fluctuation of system operation is greatly enhanced, which brings new challenges to the safe and stable operation of the system. However, with the development and cha...

AI Technical Summary

Problems solved by technology

The existing technology regards the entire system as a research object, and the calculation methods are all model-based methods. The calculation accuracy is affected by the model accuracy, and the calculation efficiency is limited by the system scale, and it is impossible to directly provide the spare capacity required by each node.

At present, no research has directly focused on each load node. From the perspective of preventive control, in order to maintain the risk of power outage at a load node at a certain level, from the perspective of real-time operation, it is necessary to predict the backup capacity that the node needs to provide in a load response manner. value of

Images