Modeling and fault early warning method and modeling and fault early warning system for dry-type reactor

Abstract

The invention provides a modeling and fault early warning method and system for a dry-type reactor, and the method comprises the steps: building an electromagnetic-circuit two-dimensional analysis model of the dry-type reactor through Maxwell, enabling the model to comprise a finite element magnetic field model and a circuit model, and obtaining the packaging loss through the calculation of the model; calculating temperature field and flow field distribution of the reactor by taking the encapsulation loss as a heat source of a three-dimensional fluid-temperature field, and performing multi-physical field model fusion by adopting a loop iteration algorithm to establish a three-dimensional fluid-temperature field finite element model; carrying out order reduction on the three-dimensional fluid-temperature field finite element model by adopting a PSO-SVM fusion algorithm; and on the basis of the model establishment, various turn-to-turn short circuit fault simulation is carried out to realize fault identification and early warning discrimination. According to the modeling and fault early warning method, the early warning accuracy is improved, and the method can be widely applied to the field of design and early warning of dry-type reactor equipment.

Description

technical field [0001] The invention relates to the field of dry reactor modeling and fault early warning methods based on multi-physics field coupling technology, in particular to a dry reactor modeling and fault early warning method and a modeling and fault early warning system. Background technique [0002] As the main auxiliary equipment of long-distance AC power transmission system, dry-type reactor plays the role of compensating capacitive current, maintaining system voltage level and improving line transmission capacity in the system, which promotes the development of power grid to a certain extent. Dry-type air-core reactors have many excellent performances and have been widely used at present. However, due to long-term operation, dry-type reactors will inevitably have various problems, and more serious ones may cause fires and burns, making the reactors unable to Normal operation poses a great threat to the security of the power grid. In addition, since the hot spo...

AI Technical Summary

Problems solved by technology

[0004] In addition, the current research also uses the multi-field coupling finite element theory to establish a three-dimensional reactor flow field-temperature field calculation model, but the model has not been integrated with the magnetic circuit model, and has not been simplified and reduced, and the calculation complexity is high.

In addition, there are few reports on the research on the dry reactor fault warning system based on the multi-physics field coupling model.

Images