Study On The Strategy Of Error Tracing Based On WAMS

Dynamic simulation is not only the basic tool for the analysis and control of power system dynamic security, but also the key reference for system operation in a power dispatching center. The post simulation of the power system fault shows that the simulation result is overly conservative. Thus, the veracity of simulation, which is mainly guaranteed by validity of models and parameters, needs to be validated. As the wide applications of WAMS, it is possible to validate model parameters by making use of the measured trajectory.Unfortunately, there are still many difficulties impeding the work of simulation validation for the multitude of the models and parameters and their strong-coupling in power systems. Hence, the paper proposes a hybrid dynamic simulation parameter correction strategy method based on measurement data-injection, in which parts of the simulation models are replaced by the measured trajectory. This method will narrow the range of errors of simulation models and parameters.This paper makes a thorough research on the interface problem of the hybrid simulation method and its numerical robustness, and data interpolation and digital filter are used to deal with measurement data. Finally, software based on the PSAT platform is developed. The case studies of the IEEE 10 machine 39 buses system and the single machine infinite bus system show the efficiency of the method.This parameter correction strategy of hybrid dynamic simulation makes it possible to get accurate model parameters of large-scale power grids.