Active splitting strategy space reduction method and system based on trend tracking

Abstract

The invention brings forward an active splitting strategy space reduction method and system based on trend tracking. The method comprises the following steps: at an online monitoring phase, according to acquired real-time operation data of a power system, calculating electric energy supplied by each generator to the load of each node, and analyzing ownership of non-generator nodes under a current trend; and at a real-time monitoring phase, dividing all the generators into I coherent generator groups, according to the ownership of the non-generator nodes under the current trend, analyzing ownership of any one non-generator node under a current coherent condition, and determining the non-generator nodes belonging to islands where the corresponding coherent generator groups are disposed. The method provided by the invention can effectively reduce the search space of a splitting strategy, greatly improves the search speed of an active splitting strategy, reserves sufficient time for stable control of the power system, and accordingly guarantees the stability of the power system and the power supply continuity of the loads.

Description

technical field [0001] The present invention relates to the field of electric power technology, in particular to a method and system for reducing the space of an active disassembly strategy based on power flow tracing. Background technique [0002] The interconnection of large power grids is an effective means to achieve optimal allocation of resources across the country. However, the continuous expansion of the scale of regional interconnected power grids also makes the stability characteristics of the power grid more complicated, and the linkage effect of large power grids increases the hidden dangers of accidents. If the system is subjected to serious disturbances that cause fleet shocks, it will be difficult for the system to restore stability through conventional emergency control measures (such as machine shedding and load shedding). Therefore, it is necessary to isolate the asynchronous clusters in the system by de-loading control. As the third line of defense for pow...

AI Technical Summary

Problems solved by technology

The key difficulty of the active solution strategy search is the huge decision space. Theoretically speaking, any line in the power grid may be disconnected during the solution solution. Therefore, the solution strategy search problem is an NP-hard problem, and it is impossible to solve it directly in the polynomial solve in time

However, active disassembly is a real-time monitoring method, which requires that the solution of the disassembly strategy must be completed quickly, so it is a very meaningful problem to study how to effectively reduce the disassembly strategy space

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