Power system dynamic security domain determination method and device, electronic equipment and readable medium

Abstract

The invention belongs to the technical field of large power grid operation and control, and relates to a power system dynamic security domain determination method and device, electronic equipment and a readable medium. The method comprises the following steps: firstly, acquiring data samples of a power system, constructing a source domain sample set, a target domain labeled sample set and a target domain unlabeled sample set, and selecting key features for describing a dynamic security domain of the power system by considering a combination effect feature selection method, and according to the minimum pre-migration feature contribution degree, migrating the source domain pre-migration features to a target domain migration sample feature set of a target domain labeled sample feature set, inputting the migration sample set into a separator which adopts a support vector machine and a migration adaptive lifting algorithm to excavate the dynamic security domain boundary of the power system. The method is suitable for scenes with diversified power grid topological structures and power system operation modes. According to the method, the efficiency and accuracy of constructing the dynamic security domain of the power system are improved, and a technical basis and a practical method are provided for security and stability analysis and evaluation of the power system.

Description

technical field [0001] The application belongs to the technical field of large power grid operation and control, and specifically relates to a method, device, electronic equipment and readable medium for determining a dynamic security domain of a power system. Background technique [0002] With the continuous expansion of the national network scale and the continuous improvement of the voltage level, the interconnection mode of the grid has become increasingly complex, and the high-penetration intermittent new energy generation and massive flexible load response have aggravated the uncertainty on both sides of the grid source and load. Moreover, the operation mode and dynamic behavior of the power system are becoming more and more complex. Once an accident occurs somewhere in the power grid, it may affect the entire network, resulting in a blackout accident. Therefore, it is an important problem to be solved urgently to adopt more advanced technical means, to study fast and ...

AI Technical Summary

Problems solved by technology

The security and stability of the power system is a complex physical problem that is difficult to analyze and express. The operating data of the power system has high dimensionality and redundant features. The disadvantages of manual analysis of the dynamic security domain boundaries of the power grid are gradually emerging.

If the dynamic security domain of the power system under each maintenance mode is reconstructed, a separate learning model needs to be trained, and this model is only suitable for the construction of the dynamic security domain for maintenance at this location. There are many, and considering different preset fault sets, there will be a lot of models that need to be trained, which will consume a lot of time and manpower, and the management of the models is also very inconvenient

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