Performance evaluation of a DC-AC inverter controlled with ZAD-FPIC

Hoyos, Fredy E.; Candelo, John E.; Ortega, Jorge Iván Silva

doi:10.17981/ingecuc.14.1.2018.01

Cited by 7 publications

(10 citation statements)

References 13 publications

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“…In this paper, is assumed to be zero. During a complete sampling period, as shown in Figure 3, the slopes are calculated from the values of the state variables at the instant of sampling = as shown in Equations (6) and (7). The slopes are then used to compute the duty cycle to be applied in the next control iteration.…”

Section: Zad Control Strategymentioning

confidence: 99%

“…An approach that combines theoretical, simulated, and experimental tests is pertinent to find the best balance. Advances in electronics have allowed the development of rapid control prototyping (RCP) platforms [4,5], where real-world systems can be automatically connected with mathematical models [6]. By integrating theoretical, simulated, and experimental methods, the best model can be identified and its control strategy validated at the same time.…”

Section: Introductionmentioning

confidence: 99%

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Model-Based Quasi-Sliding Mode Control with Loss Estimation Applied to DC–DC Power Converters

2019

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This paper presents the experimental implementation of a buck converter with quasi-sliding mode control combined with a loss estimator function. An online loss estimator is developed to estimate, in real time, the parasitic resistances of the converter and variations of the resistance in the load. The estimated loss resistance and the resistance of the load are embedded, in real time, into the model equations of the controller using Zero Average Dynamics and Fixed Point Induction Control techniques (ZAD-FPIC) to improve the control robustness to resistive parameter variations. Details of the experimental setup are presented to show developed electrical and electronic circuits, and experimental techniques are described to ensure the successful digital implementation of closed-loop control of the buck power converter. The proper shielding of electrical wiring in power electronics allows improvement to the quality of the measures by removing noise induced by electromagnetic interference. A trigger signal is used to implement the Pulse-Width Modulation (PWM) with centered pulse and to synchronize the sampling of analogical signals from the buck converter. Such synchronization allows the use of a lower sampling frequency and ensures the measurements at the right instant in time. Experimental results are in good agreement with numerical simulations, showing the effectiveness of the control approach.

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Section: Zad Control Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Model-Based Quasi-Sliding Mode Control with Loss Estimation Applied to DC–DC Power Converters

2019

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“…The CPL considered is a buck converter, as presented in [21], where the final load is a resistance that is controlled by ZAD-FPIC techniques, which are widely used in other research [19]. This technique, proposed in [22], consists of defining a function and forcing an average value of zero at each sampling period [23].…”

Section: Model Of the Cplmentioning

confidence: 99%

“…The voltage reference signal was changed to evaluate the response of the controller to different types of load. To perform the test, an electronic circuit was modeled and simulated that considers internal resistances, system discretization, quantization effects, and delay effects in order to study a more realistic circuit as in [18,19]. Finally, a numerical bifurcation was performed by changing the parameters k with the aim of visualizing the nonlinear effects of the circuit and the load.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of a Sliding-Mode Control Based on a Washout Filter with Constant Impedance and Nonlinear Constant Power Loads

2019

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Power converters (PCs) with their control techniques help regulate voltages of nodes in microgrids with different types of loads such as resistive, inductive, nonlinear, constant power, or critical loads. However, constant power loads (CPLs) affect the stability of the voltage in the output of PCs and are usually difficult to regulate with traditional control techniques. The sliding-mode control (SMC) with the washout filter technique has been recently proposed to address this issue, but studies that consider the phenomenon and parameters present in real systems are required. Therefore, this paper focuses on evaluating the dynamic behavior of an SMC based on a washout filter using three different loads: A constant impedance load (CIL), a nonlinear CPL, and a combination of CIL and CPL. The CIL considered a resistance connected to the circuit, whereas the nonlinear CPL was designed by using a buck converter with zero average dynamics and fixed-point induction control techniques (ZAD-FPIC). The tests consisted of creating some variations in the reference signals to identify the output voltage and the error that the control brings according to the different loads. Besides, this study focuses on representing the dynamic behavior of signals when loads change, considering quantization effects, system discretization, delay effects, and parasitic resistors. Additionally, bifurcation diagrams are created by changing the control parameter k and plotting the regulated voltage and the error produced in the output signals. To illustrate the advantages of the SMC with the washout filter technique, a comparison was made with other techniques such as the proportional–integral–derivative (PID) and conventional SMC by varying the load. The results showed that SMC with the washout filter technique was superior to the PID and the conventional SMC because it stabilizes the signal faster and has a low steady-state error. Additionally, the control system regulates well the output voltage with the three types of load and the system remains stable when changing the parameter k for values greater than 1, with a low error in the steady-state operation.

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“…Two of the most used renewable energies are photovoltaic panels [10,11] and wind turbines. These types of power sources require power electronics such as inverters [12][13][14] to interconnect with the microgrids [15]; thus, the inverter control must be properly adjusted to avoid undesired transient responses [16]. Power sharing among different power sources in an isolated or islanded microgrid is possible by employing traditional droop control strategy [17,18].…”

Section: Introductionmentioning

confidence: 99%

Optimal parameters of inverter-based microgrid to improve transient response

Pérez¹,

Candelo-Becerra²,

Hoyos³

2020

IJECE

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The inertia issues in a microgrid can be improved by modifying the inverter control strategies to represent a virtual inertia simulation. This method employs the droop control strategy commonly used to share the power of a load among different power sources in the microgrid. This paper utilizes a modified droop control that represents this virtual inertia and applies an optimization algorithm to determine the optimal parameters and improve transient response. The results show better control when different variations are presented in the loads, leading the microgrid to have a better control of the operation. The optimization method applied in this research allows improvement to the transient response, thus avoiding unnecessary blackouts in the microgrid. : received his Bs. degree in Electrical Engineering and his Master in Electrical Engineering from the Universidad Nacional de Colombia, Sede Medellín. He has worked on projects related to design of electrical substations, electrical risk classification, and coordination of protections. He participated in the design of the electromechanical equipment for medium and high voltage substations and transient phenomena studies, obtaining experience in power system analysis. His research interests include: renewable energy, microgrid, energy storage, and power system protection and control.

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Performance evaluation of a DC-AC inverter controlled with ZAD-FPIC

Cited by 7 publications

References 13 publications

Model-Based Quasi-Sliding Mode Control with Loss Estimation Applied to DC–DC Power Converters

Model-Based Quasi-Sliding Mode Control with Loss Estimation Applied to DC–DC Power Converters

Dynamic Behavior of a Sliding-Mode Control Based on a Washout Filter with Constant Impedance and Nonlinear Constant Power Loads

Optimal parameters of inverter-based microgrid to improve transient response

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