Real‐time simulation multi‐point decoupling method of power systems based on terminal resistor

Abstract

Traditional decoupling methods in real-time simulation of complex power systems are poor in stability and unsatisfactory in use. In order to solve this problem, an improved decoupling method based on a terminal resistor is proposed. By paralleling a fixed-value resistor and inverse-paralleling a controlled current source in the traditional ideal transformer interface, the stability is greatly improved and the range of its application is broadened. Then, the value range of resistance is deduced theoretically. Furthermore, this interface is extended to the multi-point decoupling systems; the different terminal resistances in multiple interfaces under the constraints of stability and accuracy are designed. Finally, the typical single-point and multi-point decoupling systems are constructed on the Rt-lab realtime simulation platform. The simulation results verify the effectiveness of the proposed decoupling method and indicate that the design of terminal resistances is correct either in single-point decoupling systems or in multi-point decoupling systems.