Research On Analysis And Monitoring Technique For The Operation Status Of Wind Power Busway

With the advantage of large current-carrying capacity,high current grade and long service life,wind power busway take the place of the power cable to transmit current in wind turbine generator system.The wind power busway in tower tube is vulnerable to structure fault and thermal fault when wind load acts on the tower tube,which destroys the safe operation of the wind turbine.Hence,it is of great significance to studying the structure and heating characteristics for wind power busway,in order to determine the fault locations as well as the real time status.A 3D entity model of wind power busway is established.The mechanical properties of the wind power unit under three load cases have been analyzed.The load cases include wind load at the top of tower and tower body,as well as gravity eccentric load at the wind rotor and nacelle.Then the mechanical boundary condition and load are determined to analysis the structure of the wind power busway.By comparing the stress distributions under the three load cases,the fault locations in busway are determined,which provides theoretical guidance for locating stress monitoring point and optimizing structural design of the wind power busway.Based on the theory of heat transfer,the heat transmission process,the heat source load and boundary conditions of the wind power busway are analyzed.Next,the temperature field model of the busway is established in order to get temperature field distribution.Comparing the test data,the thermal fault location of the busway is determined.Thus,the rationality of simulation for the temperature field is verified.The on-line monitoring system for wind power busway is presented in this paper.The system realizes fault early warning by collecting real-time stresses and temperatures at the fault point.Information transmission between monitoring equipment and the control center is completed by RS-485 and 4G.A special test platform which simulated the actual running environment for wind power busway is proposed.Temperature rise test,electromagnetic compatibility test and the ability of FBG strain sensor for the on-line monitoring system of wind power busway are carried out in this test platform.The results proves that the accuracy of temperature measurement and the ability to resist electromagnetic interference meet the requiredstandard for operation.Chart 35,table 10,63 references.