Tuning of Proportional-Resonant Controllers Combined with Phase-Lead Compensators Based on the Frequency Response

Mossmann, Bruno Henz; Pereira, Luís Fernando Alves; Silva, João Manoel Gomes da

doi:10.1007/s40313-021-00728-7

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…The frequency-domain method is reliable and practical for control system applications [25]. Based on the frequency response technique, this study develops a fully automated tuning process for a lag-lead compensator that consists of a lag compensator for adequate low-frequency loop gain and a lead compensator for sufficient relative stability.…”

Section: Introductionmentioning

confidence: 99%

Practical Automatic Tuning of Lag-lead Compensators for Feedback Control Systems

Tsai

Lai

2023

Period. Polytech. Elec. Eng. Comp. Sci.

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This paper proposes a scheme for auto-tuning a lag-lead compensator to satisfy frequency-domain specifications of a feedback control system. Most previous studies proposed algorithms for tuning either lag or lead compensators. A study presented a self-tuning lag-lead compensator whose proportional gain, however, needs to be set manually. In contrast to previous studies, a fully automated tuning process for a lag-lead compensator is devised in this paper. In the proposed scheme, the plant's frequency responses at specific frequencies are first estimated, and an iterative algorithm adapts all controller parameters. To facilitate the estimation of high loop gain at a low frequency, a notch filter is introduced to the control loop while estimating this high low-frequency loop gain. Without this mechanism, a real-time data acquisition system of a wide dynamic range would be required. In addition to fulfilling the requirements for the low-frequency loop gain and phase margin, another feature of the proposed scheme is the satisfaction of the required gain-crossover frequency. However, the proposed method supposes that the frequency-domain specifications can be met for a plant using a lag-lead compensator, which is the plant's requirement for the proposed method. Experimental results for controlling a voice-coil motor are reported in this paper, showing that the proposed auto-tuner can practically provide a lag-lead compensated system satisfying frequency-domain performance requirements.

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Section: Introductionmentioning

confidence: 99%

Practical Automatic Tuning of Lag-lead Compensators for Feedback Control Systems

Tsai

Lai

2023

Period. Polytech. Elec. Eng. Comp. Sci.

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A Systematic Method for Repetitive Controller Design Based on The Process Frequency Response

Brandāo

Pereira

Flores

2022

J Control Autom Electr Syst

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Multi-resonant Controller Design for a PV-Fed Multifunctional Grid-Connected Inverter in Presence of Unbalanced and Nonlinear Load

Valedsaravi

Aroudi

Barrado-Rodrigo

et al. 2023

J Control Autom Electr Syst

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The use of Active Power Filters (APFs) in future power grids with high penetration of nonlinear loads is unavoidable. Voltage Source Inverters (VSIs) interfacing Photovoltaic (PV) generator could play the APF role in addition to power supply. In this paper, the control of a PV-fed multifunctional grid-connected three-phase VSI is addressed with nonlinear and unbalanced load. The control objective is threefold. The first one is to deliver the maximum available power from the PV source to the grid satisfying power quality standards. The second one is the Voltage Balancing Control for DC-link capacitors to guarantee correct operation of the VSI. The last one is shunt APF control to compensate for nonlinear and unbalanced load harmonics, reactive power, and unbalanced sequences. A quasi-Proportional-Resonant (PR) controller with harmonic compensators is proposed for the current control loop. The quasi-PR controller parameters are determined through optimization algorithms such as Particle Swarm Optimization (PSO), Genetic Algorithm (GA), and a combination of both PSO and GA. The aim of the objective function is to improve static and dynamic behavior. The different gains at the fundamental resonant frequency and the selected odd harmonics are obtained for the proposed quasi-PR controller. The dynamic characteristics of the optimized quasi-PR controllers show superiority against conventional ones in terms of gain margin, phase margin, overshoot, and robustness. With the proposed control scheme, the harmonics, reactive power, and unbalanced sequences are appropriately compensated. The performance of the PV-fed VSI shunt APF under irradiance change, load change, and distorted grid voltage conditions is validated through numerical simulations performed on $$\hbox {PSIM}^{\copyright }$$ PSIM © software. The results show that the grid currents Total Harmonic Distortion for irradiance change case study are $$4.57\%$$ 4.57 % , $$4.57\%$$ 4.57 % , and $$3.22\%$$ 3.22 % in phase a, b, and c with the proposed control method, while they are $$9.25\%$$ 9.25 % , $$5.65\%$$ 5.65 % , and $$10.12\%$$ 10.12 % with conventional instantaneous $$p-q$$ p - q theory.

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Tuning of Proportional-Resonant Controllers Combined with Phase-Lead Compensators Based on the Frequency Response

Cited by 4 publications

References 31 publications

Practical Automatic Tuning of Lag-lead Compensators for Feedback Control Systems

Practical Automatic Tuning of Lag-lead Compensators for Feedback Control Systems

A Systematic Method for Repetitive Controller Design Based on The Process Frequency Response

Multi-resonant Controller Design for a PV-Fed Multifunctional Grid-Connected Inverter in Presence of Unbalanced and Nonlinear Load

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