Current sensorless MPPT using photovoltaic AC module-type flyback inverter

Choi, Bong-Yeon; Jang, Jae-Hyung; Kim, Young‐Ho; Ji, Yongsung; Jung, Yong-Chae; Won, Chung-Yuen

doi:10.1109/isie.2013.6563829

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…The use of voltage and current sensors increases the cost of the power converter. Sensorless MPPT algorithms have been developed [10][11][12][13] in order to reduce the number of sensors, yielding a cost reduction. In [11] a sensorless MPPT implementation based on the power balance at the DC-link was presented, which relies on the fact that the power injected into the grid (P G ) can be considered almost equal to the power extracted from the PV panels, P G ≈ P PV .…”

Section: Mppt Implementation Without V Pv and I Pv Sensorsmentioning

confidence: 99%

“…This technique increases the rejection of the disturbances caused by V DC_R . In previous applications of a similar technique [12], the MPPT algorithm was executed at twice the grid frequency, but that sampling frequency is too fast for the control loops implemented in the proposed sensorless algorithm. In the present study, the MPPT algorithm was executed once every five cycles of the grid, yielding F MPPT = 10 Hz.…”

Section: Mppt Implementation Without V Pv and I Pv Sensorsmentioning

confidence: 99%

“…Conventional MPPT algorithms use current and voltage sensors to calculate the power extracted from the PV source. Several investigations have focused on reducing the number of sensors in PV inverters when implementing MPPT algorithms [10][11][12][13], which has a positive impact on cost reduction.…”

Section: Introductionmentioning

confidence: 99%

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A Control Scheme without Sensors at the PV Source for Cost and Size Reduction in Two-Stage Grid Connected Inverters

et al. 2019

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In order to reduce the cost of PV facilities, the market requires low cost and highly reliable PV inverters, which must comply with several regulations. Some research has focused on decreasing the distortion of the current injected into the grid, reducing the size of the DC-link capacitors and removing sensors, while keeping a good performance of the maximum power point tracking (MPPT) algorithms. Although those objectives are different, all of them are linked to the inverter DC-link voltage control loop. Both the reduction of the DC-link capacitance and the use of sensorless MPPT algorithms require a voltage control loop faster than that of conventional implementations in order to perform properly, but the distortion of the current injected into the grid might rise as a result. This research studies a complete solution for two-stage grid-connected PV inverters, based on the features of second-order generalized integrators. The experimental tests show that the proposed implementation has a performance similar to that of the conventional control of two-stage PV inverters but at a much lower cost.

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Section: Mppt Implementation Without V Pv and I Pv Sensorsmentioning

confidence: 99%

Section: Mppt Implementation Without V Pv and I Pv Sensorsmentioning

confidence: 99%

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A Control Scheme without Sensors at the PV Source for Cost and Size Reduction in Two-Stage Grid Connected Inverters

et al. 2019

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“…In [42], a flyback inverter, operating in the discontinuous conduction mode, is connected at the output of the PV module for interfacing the PV-generated power to the electric grid. The output power of the PV module (i.e., P = V · I ) is calculated by measuring the PV module output voltage and also calculating the PV source output current using the following equation (assuming a loss-less power converter):…”

Section: Single-sensor Mpptmentioning

confidence: 99%

Overview of Maximum Power Point Tracking Techniques for Photovoltaic Energy Production Systems

Koutroulis

Blaabjerg

2015

Electric Power Components and Systems

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“…Reference [19] proposed a system for a water pumping application without battery backup. References [20], [21] proposed a flyback converter system [22], [23] using the P&O algorithm realized by using hill-climbing algorithms that come with the disadvantage of continuous power oscillations. Moreover, in large step sizes, these oscillations may increase further.…”

Section: Introductionmentioning

confidence: 99%

A Technique for Better Energy Management of Single-Stage Topology of Stand-Alone Photovoltaic System

Azeem

Murtaza

Abbas

et al. 2020

IJIE

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This paper proposes a technique for the energy management of a stand-alone photovoltaic system. The proposed system employs a power processing inverter that has a high PV voltage at the input to mitigate the magnitude of AC signal at the output, thus eliminating the use of DC-DC converter and reducing the input capacitor size of PV array. To meet the power requirement of load and to maintain the maximum power point operation of PV array, a battery bank is utilized with a bi-directional converter. An impedance model of the complete system is executed. Based on the model, the control architecture is designed which works in four modes: 1) if load demands > MPP of PV, additional current is extracted from the battery; 2) if load demands < MPP of PV array, extra current is given to the battery; 3) only load management is utilized since the battery bank is not available because of overcharging or under-charging; 4) if irradiation varies then the first mode is used for load requirement. The technique is designed which guarantees the maximum power point tracking of the PV system even without using any intermediate stage of a DC-DC converter, hence making it a single-stage system. MPPT is achieved by effectively controlling the bi-directional converter used for battery charging and discharging purposes. To ensure better utilization of dc voltage, enhanced efficiency, and low less harmonic distortion, a sinusoidal PWM technique is used to drive the inverter. Simulation results are carried out for ensuring better energy management along with MPPT operation demonstrated under uniform operating conditions.

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Current sensorless MPPT using photovoltaic AC module-type flyback inverter

Cited by 10 publications

References 8 publications

A Control Scheme without Sensors at the PV Source for Cost and Size Reduction in Two-Stage Grid Connected Inverters

A Control Scheme without Sensors at the PV Source for Cost and Size Reduction in Two-Stage Grid Connected Inverters

Overview of Maximum Power Point Tracking Techniques for Photovoltaic Energy Production Systems

A Technique for Better Energy Management of Single-Stage Topology of Stand-Alone Photovoltaic System

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