Lyapunov Stability and Performance Analysis of the Fractional Order Sliding Mode Control for a Parallel Connected UPS System under Unbalanced and Nonlinear Load Conditions

Ali, M. Syed; Aamir, Muhammad; Khan, Hussain Sarwar; Waqar, Asad; Haroon, Faheem; Jafri, Atif Raza

doi:10.3390/en11123475

Cited by 10 publications

(5 citation statements)

References 37 publications

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“…A sinusoidal waveform is obtained at the output of the inverter in a steady state condition, and the output voltage error always approaches zero. In (31), 1 δC…”

Section: Pwm Based Hysteresis Sliding Mode Controlmentioning

confidence: 99%

“…Single-phase pulse width modulation (PWM)-based unipolar inverters are an integral component for the realization of such systems. However, the nonlinear loads affect the sinusoidal output voltage of inverters, as they increase the total harmonic distortion (THD), resulting in the difficulty of meeting IEEE standard 1547 [1][2][3][4]. In order to regulate the output voltage in the presence of uncertain load conditions, a robust controller with good transient and dynamic response is required [5].…”

Section: Introductionmentioning

confidence: 99%

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Robust Sliding Mode Control of a Unipolar Power Inverter

et al. 2021

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The key issue in the practical implementation of the sliding mode (SM) control–based power inverter is the variable switching frequency. This variable switching frequency not only induces electromagnetic interference (EMI) noise, but also reduces the efficiency of the inverter, as the size of the inductor and capacitor does not alter in tandem with this variable frequency. In this context, fixed switching frequency–based SM control techniques are proposed; however, some of them are too complex, while others compromise the inherent properties of SM control. In this research, a fixed frequency SM controller is proposed, which is based on the novel low-pass filter extraction of the discontinuous control signal. This allows the technique to be implemented with fewer hardware components, thus reducing the complications of implementation, while maintaining the robustness and parametric invariance of SM control. A simulation-based comparison with an existing pulse width modulated (PWM) SM controller is presented as the benchmark. In comparison with the sigmoid function SM controller, an improvement of 50% in the settling time along with zero steady-state errors and a further 37% and 42% improvement in the undershoot and overshoot, respectively, is reported in the simulation. A hardware setup is established to validate the proposed technique, which substantiates the simulation results and its disturbance rejection properties.

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“…A sinusoidal waveform is obtained at the output of the inverter in a steady state condition, and the output voltage error always approaches zero. In (31), 1 δC…”

Section: Pwm Based Hysteresis Sliding Mode Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust Sliding Mode Control of a Unipolar Power Inverter

et al. 2021

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“…An offline portable generator operates in two modes of operation, inverter mode. Since the inverter usually is off while the load is powered directly from the input grid, and the other is the backup mode, the UPS will switch to inverter operation and draw energy from the battery [10]. Figure 1 illustrates the topology of portable generator passive stand-by/offline.…”

Section: Introductionmentioning

confidence: 99%

Real Time Energy Management System for LiFePO4 Portable Generator Using Smart BMS

Widjanarko¹,

Alia²,

Prasetya³

et al. 2022

Proceedings of the 2022 Annual Technology, Applied Science and Engineering Conference (ATASEC 2022)

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The portable generator is a type of power supply system that contains a battery to maintain power to provide power to electronics in the event of a power surge or outage. This paper presents energy management system for a portable generator uninterruptible power supply using LiFePO4 battery and smart Battery Management System. The portable generator potential to replace the petrol generator that noisy and not environmentally friendly. The designed of a portable generator consist of: LiFePO4 battery, 2000watt inverter, 5V 2Ampere DC-DC converter, ob board charging system, and android app. Portable generators have been applied to household electronic equipment.

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“…Hysteresis control is a type of non-linear controller, it takes the error to zero within a few-cycle and has variable switching frequency, which produces severe stress on VSI switches. This stress decreases the life of the inverter [7,8].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Model Predictive Control for Parallel Distributed Energy Resource in Islanded AC Microgrids

Khan

Kumar

Kauhaniemi

2021

2021 6th IEEE Workshop on the Electronic Grid (eGRID)

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This study proposes the voltage control strategy for distributed energy resource (DER) in islanded AC microgrids (MG). Typically, AC MG can maintain a constant voltage at the point of common coupling (PCC) as well as perform powersharing among the DERs. However, linear controllers have several restrictions such as slow transient response, poor disturbance rejection capability etc. Therefore, this study presents an FCS-MPC for a DER with effective voltage regulation capability. The investigated work demonstrates excellent steady-state performance, a low computational burden, better response under transients and have low switching frequency as compared to linear control. First, the benefits of FCS-MPVC for single DER has been studied, then the same topology along with droop control is employed for multiple DERs in AC MG to serve the load. Droop control shows improved power-sharing among the DERs. The performance of the proposed control technique is demonstrated through MATLAB/Simulink simulations for single DG and AC MG under linear, non-linear loading conditions.

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Lyapunov Stability and Performance Analysis of the Fractional Order Sliding Mode Control for a Parallel Connected UPS System under Unbalanced and Nonlinear Load Conditions

Cited by 10 publications

References 37 publications

Robust Sliding Mode Control of a Unipolar Power Inverter

Robust Sliding Mode Control of a Unipolar Power Inverter

Real Time Energy Management System for LiFePO4 Portable Generator Using Smart BMS

Design and Implementation of Model Predictive Control for Parallel Distributed Energy Resource in Islanded AC Microgrids

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