Constrained Discrete-time Proportional Integral Control Based on Convex Algorithms

2010 ◽  
pp. 45-57
Keyword(s):  
Discrete Time ◽  
Integral Control ◽  
Proportional Integral ◽  
Proportional Integral Control

scholarly journals Performance enhancement of grid-interfaced inverter using intelligent controller

2020 ◽  
Vol 53 (3-4) ◽  
pp. 551-563 ◽  
Author(s):  
Sushma Kakkar ◽  
Rajesh Kumar Ahuja ◽  
Tanmoy Maity
Keyword(s):  
Steady State ◽  
Power Quality ◽  
Reactive Power ◽  
Performance Enhancement ◽  
Parametric Uncertainties ◽  
Inference Control ◽  
Integral Control ◽  
Proportional Integral ◽  
Active And Reactive Power ◽  
Proportional Integral Control

The high-performance grid-interfaced inverters are in demand as they are rapidly used in renewable energy systems. The main objective of grid-interfaced inverters is to inject high-quality active and reactive power with sinusoidal current. Many control schemes have been proposed earlier in the literature, but the operation under parametric uncertainties has not been given much attention. In this article, an adaptive network–based fuzzy inference control algorithm for a three-phase grid-interfaced inverter under parametric uncertainties is proposed. The main purpose of the proposed technique is to enhance the response time, decrease the steady-state oscillation in the injected active and reactive power and enhance the power quality even with parametric uncertainties. For assessment and evaluation reason, the conventional proportional–integral control is compared with the proposed controller. For a fair comparison, the gain setting for the proportional–integral control is obtained by Particle swarm optimization algorithm. The suggested system is developed and simulated in MATLAB/Simulink. Simulation results demonstrate that both the controllers work well to regulate the powers to required values, even with parametric variations. However, the proposed control demonstrates superiority in comparison to conventional proportional–integral control in terms of speedy response, decreased steady-state fluctuations, better power quality and increased robustness. The rise time and fluctuations in the per-unit active and reactive power are much less with the proposed control. Total harmonic distortion of the injected current and grid current are significantly better than the conventional proportional–integral control.

scholarly journals An appraisal of proportional integral control strategies for small scale waste heat to power conversion units based on Organic Rankine Cycles

Energy ◽  
2018 ◽  
Vol 163 ◽  
pp. 1062-1076 ◽  
Author(s):  
Matteo Marchionni ◽  
Giuseppe Bianchi ◽  
Apostolos Karvountzis-Kontakiotis ◽  
Apostolos Pesyridis ◽  
Savvas A. Tassou
Keyword(s):  
Waste Heat ◽  
Control Strategies ◽  
Power Conversion ◽  
Small Scale ◽  
Integral Control ◽  
Proportional Integral ◽  
Organic Rankine Cycles ◽  
Proportional Integral Control
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