Research on the Parameter Test and Identification Method of Electromechanical Transient Model for PV Power Generation

Abstract

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

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“…A practical implementation of these issues for controlling example objects is discussed in Ref. 37,38 . Shi et al 37 propose a model structure for simulating the electromechanical transients of a photovoltaic power plant and a set of circuits for studying the transient characteristics of photovoltaic power sources based on a fault simulation device.…”

“…37,38 . Shi et al 37 propose a model structure for simulating the electromechanical transients of a photovoltaic power plant and a set of circuits for studying the transient characteristics of photovoltaic power sources based on a fault simulation device. The authors state that the known models of power electronic devices are difficult to adapt to the requirements of simulation of electromechanical transients of the power system, and their parameters are difficult to obtain.…”