Electrodynamic Analysis And Fiber Grating Detection Of Dry Reactors

In order to meet the reactor structural safety and the requirements of online monitoring,master in electric power distribution,this paper using fiber Bragg grating(FBG)sensor on-line monitoring technology to realize the encapsulation deformation of dry hollow reactor.The characteristics of fiber grating strain sensor is made of metal materials,packaging,high voltage and strong magnetic field is not affected by the reactor at work.The optical fiber Bragg grating strain sensor is arranged on the reactor package,which can be used to monitor the deformation of the reactor.In engineering applications,encapsulation and curing deformation process of dry hollow reactor with temperature rise experiment in the process of monitoring,proved that the optical fiber sensing technology can be applied in the reactor fault early warning,to provide technical support and decision-making basis for the safe operation and maintenance of dry hollow reactor and the whole grid.The main contents of this paper are as follows:(1)according to the existing research results,combined with the structure and manufacturing process of dry-type air core reactor,this paper analyzes the failure process and main causes of dry air core reactor.(2)analysis of the relationship between the electric power and the entrapment deformation.According to the basic principle of the electromagnetic field,the calculation method of the magnetic field and the electric power of a single dry air core reactor is calculated.(3)using ANSYS Maxwell finite element analysis software on a single rated voltage of 35kV,capacity of shunt reactor was simulated by 2000kVA;field circuit coupling method,the work of the magnetic field distribution and encapsulation by electric power,provide the basis for the design of fiber Bragg grating strain sensor.(4)according to the simulation results,the fiber Bragg grating strain sensor is designed on the dry air core reactor with different methods.A reasonable scheme for sensor placement is proposed(5)were monitored by dry hollow reactor temperature curing process and encapsulation of deformation in the process of experiment,we collected two species in the test of entrapment deformation data,realize the on-line monitoring of dry hollow reactor entrapment deformation.The research object of this paper is 35kV parallel dry air core reactor.It is concluded that the electric power is the main cause of the envelope deformation.According to the simulation of dry hollow reactor electric power analysis results,using the technology of optical fiber sensing,optical fiber sensor will be directly installed in the internal dry hollow reactor,the reactor entrapment deformation monitoring.The strain curves of the reactor are obtained under the condition of solidification and temperature rise.The experimental results have a good reference,and the expected monitoring objectives are achieved.The experimental study has a high reference value for the safety monitoring and fault diagnosis of dry-type air core reactor and other large power equipment.