Electric power system operation state detecting method based on dynamic partitioning

Abstract

The invention provides an electric power system operation state detecting method based on dynamic partitioning. The method includes the following steps that a power grid is partitioned dynamically according to network topological changes; states of all partitions are estimated through a weighted least square method; the electric power system operation state is detected according to the state estimation results. The power grid system topological changes can be rapidly responded to achieve dynamic partitioning of the power grid, the influence on the state estimation results of other areas by measurement data errors in a certain area is reduced, and the accuracy of total state estimation of power grid operation basis data is improved, so that it is ensured that the detected the electric power system operation state is free of errors.

Description

technical field [0001] The invention relates to the technical field of power system operation, in particular to a dynamic partition-based power system operation state detection method. Background technique [0002] Power system state estimation is one of the core functions of the energy management system (EMS) of the power system dispatching center. It is the basis of most advanced software for online applications. Its function is to detect the current running status. [0003] With the development of the power system, the unified dispatching of interconnected power systems may use the state estimation results of multiple independent dispatching centers; on the other hand, the measurement redundancy of the whole system state estimation algorithm is difficult to fully satisfy and the calculation speed is slow Unable to meet the real-time requirements, some areas have more measurement errors, which affect the state estimation accuracy of the entire system and other problems. ...

AI Technical Summary

Problems solved by technology

These methods use optimization techniques to directly take the boundary constraints into the state estimation solution process, but ignore the influence of non-boundary nodes on the state estimation of other partitions.

When the operation mode of the power system changes, load transfer, switching action and other operations occur, the topology structure will often change. At this time, if the traditional method is still used, the error of the detected power system operation status will be relatively large.

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