Active splitting section searching method for power system, and island adjustment strategy

Abstract

The invention proposes an active splitting section searching method for a power system, and an island adjustment strategy. The method improves a spectrum cluster algorithm developing in a machine learning field, and proposes a constraint-contained spectrum cluster algorithm so as to give consideration to the coherent constraints of a generator set, thereby enabling a splitting selection searching problem to be converted into a generalized eigenvalue solving problem. In order to iron out the defects that it is sensitive to an initial central point and the searching efficiency is low because the constraint-contained spectrum cluster algorithm employs a conventional k-medoids algorithm, proposes the improving of the k-medoids algorithm, and enables the k-medoids algorithm to be combined with the constraint-contained spectrum cluster algorithm, so as to solve an optimal splitting section. For each island which does not need the safety constraint, the output of the generator set is optimized and adjusted, and some loads can be reduced during needs, so as to meet the safety operation of each island. Finally, an IEED 118 node is taken as a sample, thereby indicating the feasibility and effectiveness of the method.

Description

technical field [0001] The invention relates to the field of electric power system restoration, in particular to the strategy of active disconnection section search and island adjustment of the electric power system. Background technique [0002] As an emergency control method, decoupling is the last line of defense for the safe and stable operation of the power system. Its function is to isolate the asynchronous cluster, block the propagation of faults, and avoid large-scale power outages. The traditional out-of-step separation method uses offline analysis to determine the separation section and install the separation device, which has been widely used in actual power systems. However, with the continuous expansion of the system scale and the formation of cross-regional interconnection grids, it is difficult for out-of-step splitting to adapt to the current complex and changeable system conditions. If we can start from the overall situation of the power system, use the wid...

AI Technical Summary

Problems solved by technology

However, with the continuous expansion of the system scale and the formation of cross-regional interconnection grids, it is difficult to adapt to the current complex and changeable system conditions.

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