In recent years, electronic mutual-inductor and IEC61850 serial standards are adopted in digital substation. Once electronic mutual-inductor has been used, the input signals of relay protection and other secondary devices are not the traditional analog quantities any more. The simulation system cannot offer such interface up to now, so the secondary devices which are based on electronic mutual-inductor in digital substation cannot be tested and researched in this way. A kind of testing system aiming to real-time digital relay protection is introduced in this paper. By adding secondary interface to the primary simulation system, such as ADPSS (invented by China Electric Power Research Institute), a closed-loop testing system which is based on IEC61850 standards is established. The testing results verify that the system has great significance on improving the application of digital substation, and it has great use value.Keyword digital substation IEC61850, secondary interface, photoelectricity transformer, dynamic test ___________________________________ 978-1-4244-9621-1/11/$26.00 ©2011 IEEE

Abstract：Simply stated the potential risks of the grid power system economic operation brought by a large-scale establishment of new energy. Faced with the problems of making the power grid coordination and efficient safe operation, and making it suitable for clean energy and distributed power systems, this paper establishes the model combined ultrastructure modelling and optimization of hybrid method, makes the program using GAMS software, and at last establishes the dynamic model of the power point coordinated control in a regional smart grid, which contains conventional and new energy and pumped storage power station. Beside, make a case of Hebei South Power Grid, deduce coordinated operation of different power point control strategy of Hebei South Power Grid. Point the basic ideas and guidelines for regional grid coordination of various power control strategy for running.

A method of data connection by a digital simulator and EMS system is provided in the paper, and integration with off-line data and EMS real-time data can be operated automatically. On present situation, almost all of analyses of electric power system adopt off-line data which is much more onerous input in computer by hand, and the result can not accurately describe the actual condition in operation. With the use of standard IEC61970 in our country, EMS system has the uniform data-interface. Applying on-line data to playback of system failure, the contrast of oscilloscope data and simulation data demonstrates that on-line data can not only describe the steady characteristic, but also accurately describe transient characteristic of power system. Therefore, researching on EMS data-interface will greatly improve the accuracy of simulation veracity and it will has great significance.

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