Print Email Facebook Twitter Testing of Fast Transfer Relay by an EMTP-based Approach Title Testing of Fast Transfer Relay by an EMTP-based Approach Author Wu, Wenbin (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Popov, M. (mentor) van der Meijden, M.A.M.M. (graduation committee) Ghaffarian Niasar, M. (graduation committee) A.de Clippelaar, Steven (graduation committee) Degree granting institution Delft University of Technology Programme Electrical Engineering | Sustainable Energy Technology Date 2018-07-16 Abstract Industries such as chemical companies need a continuous power supply and the fast transfer relay Siemens 7uv68 is designed to transfer frompresent feederwhich encounters a fault to an auxiliary feeder and minimizes the transient torque of the induction motors during transfer. The relay will be installed in a DOW power plant in South Tarragona, and it should be validated that the relay can operate well in all kinds of fault scenarios and no mis-operation would occur in such power plant.To perform the relay testing, first, the fault signals which reflect the dynamic performance of DOW Tarragona are generated by ATP-EMTP. The EMTP model of the DOWpower plant has two main parts: the Tarragona power plant and auxiliary relays (overcurrent 50/50N, differential 87T) which send tripping and blocking command to 7UV68. Besides, in order to track the frequency and phase deviation between auxiliary feeder bus and the motor bus during transfer, the frequency measurement is accomplished bya zero-crossingmethod and phase angle ismeasured byClarke transformation. The test setup is made by 2 Omicron Amplifiers and a PLC which is used to simulate breakers’ behavior formain-tie configuration.Based on the testing requirements, the relay settings are tuned to ensure the motor bus transfer can be initiated by all kinds of faults in feeder bus, and there is no mal-operation if blocking signal is sent. The motor bus can also be transferred to the auxiliary bus when a fault occurs in transmission grid with the help of relay self-start function. Furthermore, the trip delay of differential relay 87T and the communication delay affects the transfer time and the transfer inrush behaviors. Subject ATP-EMTPMotor Bus TransferFrequency TrackingInduction MotorsTransient torquesFast transfer relayPower System ProtectionElectric machineFault AnalysisRelay Testing To reference this document use: http://resolver.tudelft.nl/uuid:d246340d-4664-47b6-aeb5-d8c331406ef6 Part of collection Student theses Document type master thesis Rights © 2018 Wenbin Wu Files PDF Thesis_final_WenbinWu_719.pdf 5.19 MB Close viewer /islandora/object/uuid:d246340d-4664-47b6-aeb5-d8c331406ef6/datastream/OBJ/view