Dynamic Model of Medium Voltage Vacuum Circuit Breaker and Induction Motor for Switching Transients Simulation Using Clark Transformation

被引:3
作者
Pigl, Jan [1 ]
Cipin, Radoslav [1 ]
机构
[1] Brno Univ Technol, Fac Elect Engn & Commun, Dept Power Elect & Elect Engn, Brno 61600, Czech Republic
关键词
switching transients; vacuum circuit breaker; induction motor; clarke transformation; space vectors; ODE23s; EMTP;
D O I
10.3390/en16031020
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A derivation of the dynamic model of a medium voltage vacuum circuit breaker and induction motor in space vectors in coordinates alpha beta 0 allow us to model switching transients in various dynamic states of the motor. In the case of the Clark transformation, the corresponding numerical integration technique can be selected including variable time-step integration techniques to avoid numerical instabilities due to the stiffness of the system. Assymetrical operations such as switching cause the power system to become unbalanced and the transformed equations alpha, beta, and 0 are not uncoupled. Therefore, it is necessary to derive a coupling matrix between circuit breaker voltages and currents in the coordinate system alpha beta 0. The subject of our interest is switching overvoltages that arise when turning off small inductive currents by a vacuum circuit breaker. When deriving the model of a vacuum circuit breaker, all its properties encountered during this action are taken into account, i.e., current chop, virtual current chop, dielectric barrier in the circuit breaker and its recovery rate, and the ability of the vacuum circuit breaker to extinguish high frequency currents. Simulation results are compared with the measured results on a medium voltage motor as well as with the simulation results of the mathematical model of the test circuit according to IEC 62271-110 resolved using the nodal method (EMTP algorithm). Models are implemented in the MATLAB/Simulink programming environment.
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页数:22
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