Model and parameters are the indispensable conditions for the simulation calculation of\npower systems with a high proportion of photovoltaic power generation. Conventional models of\npower electronic devices are difficult to meet the requirement of power system electromechanical\ntransient simulation, and the parameters are difficult to obtain. Aiming at this problem, this paper\nproposes a structure of an electromechanical transient simulation model of a photovoltaic power\nstation and designs a set of photovoltaic power generation transient characteristic test systems\nbased on a fault simulation device. Through a disturbance test and model parameter identification,\nthe electromechanical transient simulation model and parameters of photovoltaic power generation\nare obtained. In this paper, based on the test system, the electromechanical transient characteristics of\na certain type of photovoltaic inverter are modeled. The results show that the model can successfully\ndescribe the electromechanical transient characteristics of photovoltaic power generation, and the\nsimulation results obtained based on the model parameters have a good fitting degree compared\nwith the measured curve.
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