Open Access

ARTICLE

Modeling and Simulation Analysis of Solar Thermal Electric Plants Based on Petri Net

by Rong Huang¹, Xiaojuan Lu^2,*, Zeping Liang², Pengfei Gao¹, Tian Liang¹

1 State Grid Gansu Provincial Electric Power Company Electric Power Research Institute, Gansu Provincial Key Laboratory of New Energy Grid-Connected Operation Control, Lanzhou, 730070, China
2 Lanzhou Jiaotong University, Lanzhou, 730070, China

* Corresponding Author: Xiaojuan Lu. Email:

Energy Engineering 2022, 119(4), 1711-1728. https://doi.org/10.32604/ee.2022.019128

Received 04 September 2021; Accepted 12 November 2021; Issue published 23 May 2022

Abstract

At present, solar thermal power generation is in the demonstration stage, and the large-scale production is affected by many factors. In view of the characteristics of different operating modes of photothermal power generation, it is analyzed that the turbine needs to be started and stopped frequently due to different operating modes, which will lead to the instability of the output energy and the reduction of power generation efficiency. In this paper, the dynamic equation of energy conversion process is established by using the law of conservation of energy and conservation of mass. Combined with the logic switching criterion of the system, the system model was established by using the extended differential Petri net, and the validity and accuracy of the model were verified. Through the Petri net model of the system, the system’s working mode switching and power generation situation are analyzed due to the difference of direct normal irradiation intensity (DNI). Finally, the accuracy of the model is proved by comparing it with experimental data of the photovoltaic and thermal demonstration projects that have been connected to the grid.

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Graphic Abstract

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