TY - JOUR
TI - Modelling and control of solar thermal power generation network in smart grid
AU - Wang Ruilian
AU - Zhang Zichao
AU - Wei Xinxu
JN - Thermal Science
PY - 2021
VL - 25
IS - 4
SP - 2861
EP - 2870
PT - Article
AB - The thermal storage system is an essential part of the trough solar thermal  power generation system. Due to the strong randomness, intermittency, and  volatility of solar energy resources, to further improve the system's  overall reliability to meet the needs of variable operating conditions, the  paper optimizes the control strategy of the trough solar heat storage  system. Taking the molten salt heat storage medium in the oil/salt heat  exchanger, the core equipment of the heat storage system, as the critical  research object, the article adopts proportional, integral, and  differential (PID) control theories. It builds the system in the  MATLAB/Simulink simulation environment mathematical model. We use the  critical proportionality method to determine many critical parameters in the  control system, tune the proportional coefficient, integral time, and other  physical quantities in the PID controller, and analyze the proportional  control, proportional-integral control, PID controls the respective dynamic  response characteristics of these three different control systems. The  simulation and comparative analysis results show that: compared with the  other two control methods, PID control can effectively weaken the heat  storage system oscillation caused by external disturbance, its dynamic  response speed is faster, the adjustment time is shorter, and it can meet  the requirements of operational stability. The paper adopts PID control,  which reduces the control difficulty of the trough solar heat storage system  and improves the adaptability to changes in external meteorological  resources. The research results have particular guiding significance at the  academic and engineering levels.