Design and Implementation of Dynamic Simulation Testing System for Digital Protection Based on IEC 61850

摘要

The application of IEC 61850 standard has brought significant reform to substation automation system. In such substations, protection equipments get digital signal of currents and voltages directly from electronic transducers and issue digital tripping signal to intelligent circuit breaker controller. Such digital protection relays are different from traditional microcomputer based relays in both hardware and signal processing. The traditional relay testing methods are no longer adaptable to such new type of relays. This paper analyzed the requirements for testing digital protection devices based on IEC 61850 , proposed an idea for how to establish a suitable testing system by upgrading conventional power system dynamic simulation system. The new testing system has been implemented in the power system dynamic simulation laboratory of Shandong University according to the proposed idea. The preliminary test results has showed that the new testing platform is able to provide required secondary interface characteristic and testing environment. This proposed testing system can be used to carry out dynamic simulation tests to different kinds of IEC 61850 based protection relays.