Electric system static safety analysis method considering backup automatic switch

Abstract

The present invention discloses an electric system static safety analysis method considering backup automatic switch. The method comprehensively utilizes a voltage loss determination algorithm based on Jacobian matrix singularity, a backup automatic switch input algorithm, a mixed current algorithm, a sensitivity method and the like. The voltage loss determination algorithm based on Jacobian matrix singularity is employed to perform voltage loss-island topology analysis of a power grid and check whether the power grid has voltage loss nodes or not. If the power grid has no voltage loss nodes,the sensitivity method is directly employed to calculate the current of the system after faults are generated; if the power grid has voltage loss nodes, the backup automatic switch input analysis needs to be performed to apply motion to the related backup automatic switch in the power grid. The state of the power grid can be possibly changed to N-1+1 and even N-1+M, at the same time, the mixed current algorithm can be utilized to calculate the current of the system. The method can adapt radiating features of an urban power grid distribution network and can consider automatic device factors soas to greatly express the practical operation of the urban power grid when risk assessment of the urban power grid is performed.

Description

technical field [0001] The invention relates to the technical field of intelligent analysis and control of electric power systems, in particular to a static safety analysis method of electric power systems considering backup and automatic switching. Background technique [0002] Static safety analysis of power system is to analyze the steady-state operation of the system after the expected accident occurs. For example, when the line, transformer, busbar and generator are disconnected, will it cause overloading of other equipment, will it cause the node voltage to exceed the limit; and, corresponding to the overload and limit in a certain situation, provide an alternative system adjustment strategy network. In the operation of the power system, in order to avoid equipment damage caused by overload and voltage crossing, or cause a large-scale chain reaction power outage due to the outage of overloaded equipment under the protection of the system, the static safety analysis of...

AI Technical Summary

Problems solved by technology

[0004] At present, the static security analysis method of power system usually uses the traditional sensitivity-based method for analysis, and the sensitivity method analyzes the steady-state operation of the urban power grid after the expected accident, which has certain limitations and cannot adapt to the radial characteristics of the urban power grid distribution network. , and did not take into account the automatic devices, especially the automatic input

When evaluating the operation risk of the urban power grid, it cannot reflect the actual operation of the urban power grid.

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