Research on Intelligent Control Technology of PV Grid-Connected Inverter

2014 ◽  
Vol 672-674 ◽  
pp. 135-139 ◽  
Author(s):  
Yun Bo Zhang
Keyword(s):  
Intelligent Control ◽  
Control Strategy ◽  
Pid Control ◽  
Physical Simulation ◽  
Digital Simulation ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Pv System ◽  
Grid Connected Inverter ◽  
Pv Grid

Based on the mathematical model of the three-phase two-stage PV grid inverter, the fuzzy-PID control strategy is applied in the grid connected control of PV system in this paper. The purpose of the intelligent control of photovoltaic grid connected inverter has been achieved. The digital simulation and physical simulation show that the fuzzy-PID control strategy can improve the PV system grid control dynamic process and get the smooth connection of the PV system with the power grid. At the same time, the harmonic pollution on the grid has been significantly reduced.

scholarly journals Master and Auxiliary Compound Control for Multi-Channel Confluent Water Supply Switching Control Based on Variable Universe Fuzzy PID

2020 ◽  
Vol 10 (22) ◽  
pp. 7983
Author(s):  
Ge Zhao ◽  
Jian Wang ◽  
Wei Li ◽  
Jinsong Zhu
Keyword(s):  
Water Supply ◽  
Control Strategy ◽  
Pid Control ◽  
Fire Fighting ◽  
Step Response ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Variable Universe ◽  
Main Pipe ◽  
Compound Control

During the multi-channel confluent water supply process, the pressure control of the main pipe is often held back by such problems as non-linearity, hysteresis and parameter uncertainty, its own unique load dynamic changes, channel switching disturbance and other system characteristics caused by the actual working conditions. Moreover, pressure fluctuations in the main pipe will lead to a reduction in the service life of fire-fighting equipment, an increase in the failure rate, and even an interruption of the fire-fighting water supply. Therefore, a master and auxiliary control strategy is proposed to stabilize the pressure change in the process of multi-channel concentrated water supply switching, by using variable universe fuzzy proportional integral derivative (PID) control as the main controller on the main pipe and traditional PID control as the subsidiary controller on the channel. The control strategy is verified by the co-simulation platforms of LabVIEW and AMESim. Simulation results show that the variable universe fuzzy PID control and the master and auxiliary compound control based on the variable universe fuzzy PID control have advantages in step response, tracking response and anti-interference, respectively. The parameters obtained in the co-simulation are used in the experimental system. The experimental results show that the maximum deviation rate of main pipe pressure can be reduced by about 10% compared with other control methods under different loads. In conclusion, the proposed control strategy has strong anti-interference ability, fast dynamic response speed, high stability and good peak shaving effect.

scholarly journals An Electro-Hydraulic Servo with Intelligent Control Strategy

2018 ◽  
Vol 150 ◽  
pp. 01016 ◽  
Author(s):  
Saeed Mohammed ◽  
Chong Chee Soon ◽  
Rozaimi Ghazali ◽  
Ahmad Anas Yusof ◽  
Yahaya Md Sam ◽  
...  
Keyword(s):  
Intelligent Control ◽  
Control Strategy ◽  
High Speed ◽  
Assessment Process ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Control Effort ◽  
Control Approach ◽  
Hydraulic Servo ◽  
Hybrid Fuzzy Pid

Versatile engineering applications have been developed to assist, reduce, and avoid human being from any heavy or harmful manufacturing processes. The gradually increased demand in force and position controls have simultaneously increased the usage of Electro-Hydraulic Servo (EHS) system. However, the time varying characteristics such as high-speed, outburst starting and stopping dynamic have led the EHS system to suffer from uncertainties and nonlinearities effects. Therefore, in order to enhance the performance of an EHS to surmount the uncertain and nonlinear effects, a hybrid Fuzzy-PID control strategy is developed which particularly improve the accuracy of the system by enhancing the control performance during the positioning tracking. By measuring the performance of the proposed control approach, the transient response and steady-state analysis will be performed which taking linear and intelligent control strategies as the references in the assessment process. The finding indicates the capability of a hybrid Fuzzy-PID controller in reducing the control effort applied to the EHS system.

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