Time-domain Automatic Verification Method Of Excitation System Model And Parameter Based On Grid Equivalence

Excitation system parameter is one of the four parameters in power system, which isthe important basis of power system simulation. The parameter correct or not have greatimpact on stability analysis and safety analysis of power system. With promotion of UHVpower grid development strategy and increase of total generation installed capacity, The test,modeling and verification of excitation system model and parameter are becoming moreand more urgent and important. The verification of excitation system model and parametershould be guaranteed well which is one of the key work in ensuring safe and stableoperation of power system.Time-domain automatic verification method of excitation system model and parameteris in-depth studied, including grid equivalence method based on field-test result,time-domain automatic verification of excitation system model and parameter, datamanagement and model transformation. And software package of automatic verification ofexcitation system model and parameter is established. Static grid equivalence is adoptedin the paper, making the external power system of generation studied equivalent ofsingle infinite system and obtaining equivalent parameter by non-linear least-squaresmethod. Time-domain verification model of excitation system is established on thisbasis of grid equivalence. The verification results can be obtained automatically bycomparing simulation data and field-test data according to national and industrystandard. And model transformation to PSASP and BPA is realized based on analyzingexcitation model and parameter.Demonstrated by simulation results, the method of grid equivalence for verification ofexcitation system model and parameter can reflect system characteristics well and thealgorithm is simple, grid equivalence is easy to implement. Grid equivalence, time-domainautomatic verification of excitation model and parameter, data management and modeltransformed to PSASP and BPA are achieved by the software package. The achievement inthis paper can reduce labor participation on verification of excitation model and parameterand improve work efficiency, and it also has positive impact on propelling automation andstandardization of verification on excitation system model and parameter.