Simulation of Transients in Interconnection Test of Regional Power Grids

At the end of the year 2008 the interconnection tests of two domestic large-scale regional power grids by means of 500kV system and 1 000kV system respectively were performed. To check the correctness of static and dynamic models as well as that of model parameters and to master the dynamic characteristics of interconnected power grids, based on the testing data recorded by energy management system (EMS) and wide area measurement system (WAMS) of regional power grid companies, the simulation research on the two tests is carried out by power system analysis software package (PSASP). Based on well-adjusted steady state and by means of analyzing and optimizing the simulation scheme for disturbances as well as correcting and adjusting power flows and regulator parameters continually, the obtained waveforms from the simulation conform to actually measured waveforms well and the transient process in the tests are successfully reappeared, thus the simulation models that coincide with dynamic characteristics of power grids are attained.