Research On Equipment Failure Prediction Method Of Substation Switching Operating System

The substation serves as an intermediate station for power transfer in the power supply system,mainly to change the voltage level,current size,and distribute the received power to the power consumption side.In particular,transmission lines and transformers respectively play the role of transmitting electrical energy and changing voltage levels in substations.However,due to the different main wiring methods of the substation,the operation sequence of the switch is very different,so when the transmission line or electrical equipment needs to be repaired or a fault occurs,if the operation and maintenance personnel are not clear about the sequence of the switch,there is a slight negligence during the switch There will be misoperation,which will cause great harm to the power grid.This paper is based on the existing substation monitoring system,using related algorithms and simulation software,mainly to study the specific operation sequence of the operating system in the switching system and the transmission line and transformer fault prediction method.When an abnormality is predicted,the operator is reminded Gate operation.This article mainly carried out the following work:1.First,the bridge-shaped wiring structure of the substation is explained,and the advantages and disadvantages of the inner and outer bridge wiring are pointed out.And according to the wiring method and the "five-prevention" rule of the trip,the circuit and transformer switching steps of the inner bridge and the outer bridge are described in detail.Based on rule reasoning,the operation rule function under the 7 operating modes under the internal bridge connection mode is studied.2.Based on the analytic hierarchy process and fuzzy comprehensive evaluation method,the transmission line and transformer fault prediction.AHP is used to determine the weight of each index factor,and then a comprehensive evaluation model of transmission lines and transformers is established to obtain the final prediction results.Predict the abnormal parts of transmission lines and transformers,and provide reference for the operation of the operation and maintenance personnel.3.Adopt wavelet packet decomposition and support vector machine to classify short-circuit faults of transmission lines.Use the simulation software PSCAD to build a 110 kV transmission line short circuit fault model,simulate 740 sets of fault signals,use wavelet packet decomposition to reconstruct the fault sampling signal,extract the energy entropy of the fault signal as the feature vector of the sample,and train it as the fault classification model For samples,support vector machines are used for fault classification and prediction.This paper studies the operation of the substation,and gives the operation function of the operation under different operation modes of the internal bridge substation,which makes the operation of the switch more standard.The method for predicting the faults in the transmission line and transformer state proposed in this paper can predict Whether the transmission line and the transformer are in an abnormal state;this paper studies the fault classification algorithm of the transmission line,which can timely identify the type of short-circuit failure in the substation and provide reference for the operation and maintenance personnel.