A Single-Phase Grid-Connected Inverter System With Zero Steady-State Error

Xiaoqiang,; Qinglin,; Weiyang,

doi:10.1109/ipemc.2006.297018

Cited by 9 publications

(3 citation statements)

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“…With ( 13) the gain of the PR controller at the ac frequency ω0 is now finite but it is still large enough to provide only a very small steady state error. This equation also makes the controller more easily realizable in digital systems due to their finite precision [21][22][23].…”

Section: Pr Controller Designmentioning

confidence: 99%

Comparison between PI and PR Current Controllers of a Grid- Connected Photovoltaic System Under Load Variation

Essaghir

Benchagra

Barbri

2018

IJPEDS

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This paper presents a current control technique for a three-phase grid-connected DC /AC inverter which is used in photovoltaic systems. A Proportional-Resonant (PR) controller is used for replacing the conventional Proportional-Integral (PI) controller in this system. By comparison with the conventional PI control method, the PR control can introduce an infinite gain at the fundamental frequency and hence can achieve zero steady-state error. The proposed model is based on two control loops: the first control loop regulates DC link voltage and the second one is used to keep the injected current to the grid in phase with the voltage by means of a Phase Locked Loop (PLL) in order to achieve a unit power factor and to adjust the output power as required. In order to examine the effectiveness of the suggested control, a simulation using the Matlab/Simulink software has been done and it’s concluded from the simulation results that the presented control by using the PR controller can be able to maintain maximum active power and to keep always a unity power factor despite variation load.

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Section: Pr Controller Designmentioning

confidence: 99%

Comparison between PI and PR Current Controllers of a Grid- Connected Photovoltaic System Under Load Variation

Essaghir

Benchagra

Barbri

2018

IJPEDS

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“…Through the above can be got： To get the space voltage vector Ux in the first sector, firstly, the switch state combination V1, V2 must be confirmed , and letting the V1, V2 work alternately, the ratio of working time is sin(π/3-ωt)/ sin(ωt).Further extended to all sectors, first judging composing vector of space voltage in which sectors ,then selecting the sector adjacent switch state Vn, Vn+1, n∈ (1,2,3,4,5,6),and then let the Vn, Vn+1, works alternatly , the specific time An(ωt), An+1(ωt) can compose arbitrary space voltage vector Ux.…”

Section: Fig5 Inverter Main Circuitmentioning

confidence: 99%

The Design and Implementation of PV Inverter for Grid-Connected System Base on SVPWM

Zhang

2014

AMM

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A PV inverter Grid-Connected system based on SVPWM is designed here, which is consisted of DC/DC circuit, TMS320F2812 , optical isolating circuit and driver circuit, three-phase inverter bridge, Grid signal acquisition circuit. Besides,program of the system is built with CCS3.3. SVPWM, MPPT, Grid-Connected, control comes true with the help of C language. Improved variable step size perturbation and observation method is applied in MPPT, which saves time of searching maximum power point and avoids oscillation generated. The experimental results show that the system can not only meet the design requirements, the Grid-Connect effect is also ideal.

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“…Two types of filter which is vital to consider for harmonics cancellation is the shunt and series active filter. Both have their own purposes; to inject currents so that it cancels harmonic currents directly and compensates distortion of voltage caused by non-linear loads respectively [12]. The performance of these filters are evaluated on the current control and the harmonic reference generation system.…”

Section: Introductionmentioning

confidence: 99%

Proportional resonant current controller strategy in inverter application

Salimin¹,

Noor²,

Jumaat³

2019

IJPEDS

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This paper presents the method of proportional resonant current controller strategy in inverter system application. In this study, the mathematical modelling of the controller is shown in detail. This is important for the modelling in Matlab Simulink. Nowadays, the decrement of power quality is easily found in this inverter system where inverter extensively used as interface circuits. To solve this problem, proportional resonant current controller is the solution. At resonant frequency, this controller has infinite gain which ensures a zero steady-state error in a stationary frame. This will result in minimized load current distortion as well as the harmonic contents. At the end, simulation result shows when using PR current controller, the unwanted harmonics injection are much reduced.

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A Single-Phase Grid-Connected Inverter System With Zero Steady-State Error

Cited by 9 publications

References 0 publications

Comparison between PI and PR Current Controllers of a Grid- Connected Photovoltaic System Under Load Variation

Comparison between PI and PR Current Controllers of a Grid- Connected Photovoltaic System Under Load Variation

The Design and Implementation of PV Inverter for Grid-Connected System Base on SVPWM

Proportional resonant current controller strategy in inverter application

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