Single-Phase Single-Stage PV-Grid System Using VSI Based on Simple Control Circuit

Riyadi, Slamet

doi:10.11591/ijpeds.v3i1.1860

Cited by 5 publications

(7 citation statements)

References 4 publications

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“…MPPT algorithm is required for tracking the maximum power point due to the continuous change of ambient temperature and irradiance of the solar source. There are two well-known MPPT algorithms which are: perturb and observe method, and incremental conductance method, [16,17].…”

Section: Methodsmentioning

confidence: 99%

Lightning performance analysis of a rooftop grid-connected solar photovoltaic without external lightning protection system

Nasir¹,

Kadir²,

Radzi³

et al. 2019

PLoS ONE

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The Sustainable Energy Development Authority of Malaysia (SEDA) regularly receives complaints about damaged components and distribution boards of PV systems due to lightning strikes. Permanent and momentary interruptions of distribution circuits may also occur from the disturbance. In this paper, a solar PV Rooftop system (3.91 kWp) provided by SEDA was modelled in the PSCAD/EMTDC. The Heidler function was used as a lightning current waveform model to analyse the transient current and voltage at two different points susceptible to the influence of lightning events such as different lightning current wave shape, standard lightning current and non-standard lightning current. This study examines the effect on the system components when lightning directly strikes at two different points of the installation. The two points lie between the inverter and the solar PV array and between inverter and grid. Exceptionally high current and voltage due to the direct lightning strike on a certain point of a PV Rooftop system was also studied. The result of this case study is observed with and without the inclusion of surge protective devices (SPDs). The parameters used were 31 kA of peak current, 10 metres cable length and lightning impulse current wave shape of 8/20μs. The high current and voltage at P1 striking point were 31 kA and 2397 kV, respectively. As for the AC part, the current and voltage values were found to be 5.97 kA and 5392 kV, respectively.Therefore, SPDs with suitable rating provided by SEDA were deployed. Results showed that high transient current voltage is expected to clamp sharply at the values of 1.915 kV and 0 A at the P1 striking point. As for the AC part, the current and voltage values were found to be 0 kA and 0.751 V, respectively. Varying lightning impulse current wave shapes at striking point P2 showed that the highest voltage was obtained at waveshape 10/350 μs at 11277 kV followed by wave shapes of 2/70 μs, 8/20 μs and 0.7/6 μs. The high value of transient voltage was clamped at a lower level of 2.029 kV. Different lightning amplitudes were also applied, ranging from 2–200 kA selected based on the CIGRE distribution. It showed that the current and voltage at P1 and P2 were directly proportional. Therefore, the SPD will be designed at an acceptable rating and proper position of SPD installation at solar PV Rooftop will be proposed. The results obtained in this study can then be utilised to appropriately assign a SPD to protect the PV systems that are connected to the grid. Installing SPDs without considering the needs of lightning protection zones would expose the expensive equipment to potential damage even though the proper energy coordination of SPDs is in place. As such, the simulation results provide a basis for controlling the impacts of direct lightning strikes on electrical equipment and power grids and thus justify SPD coordination to ensure the reliability of the system.

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Section: Methodsmentioning

confidence: 99%

Lightning performance analysis of a rooftop grid-connected solar photovoltaic without external lightning protection system

Nasir¹,

Kadir²,

Radzi³

et al. 2019

PLoS ONE

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“…Equation (14) shows that the five-level inverter could be used as a controlled current source strategy to transmit power, Figure 6.…”

Section: Figure 1 Characteristic P-v Curve Of Pvmentioning

confidence: 99%

“…An implementation using DSP hardware is commonly rather complex in algorithm and must have a good performance. Though single-phase singlestage PV-grid system using hill-climbing control or P & O has a good performance [4], [12][13][14], the hill-climbing algorithm based on ∆ V and ∆ P has some oscillations at maximum power point. If ∆ V and ∆ P are large, the system will be faster to achieve maximum power, but the system would produce greater oscillation.…”

Section: Introductionmentioning

confidence: 99%

Capacitor Bank Voltage Equilibrium for MPPT in Single-Phase Single-Stage Five-Level Inverter for PV-Grid Application

Pratomo¹,

Wijaya²,

Firmansyah³

2015

TELKOMNIKA

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Single-phase single-stage PV-Grid system using a five-level inverter has been investigated. Some of integration systems used two-stage converters, while others used single-stage converter. However, two-stage converters had a very complicated problem. The first converter acted as a maximum power point tracker to maximize power generated by sunlight energy to electric power, implemented by PV. The second stage was used as an interface to the grid. In single stage-converter was very simple in which an inverter was used for a maximum power point tracker and interface to the grid. This paper is designed to develop a single-stage PV-Grid system using a single-phase voltage source five-level inverter. The voltage equilibrium on capacitor was to make PV generate maximum power; hence, the equilibrium voltage between PV and five-level inverter output was proposed to deliver that maximum power generated by PV to the grid. Here, an analysis and a simulation were performed to demonstrate the design effectiveness.

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“…The phase voltages (va, Vb, vc) and currents Cia, h, ic) in three phase system (abc-coordinate) can be converted into a� coordinate (vm vp) and Cim ip) (2) Then the instantaneous active power (P) and reactive power (q) can be determined by using the voltage and current quantities in the a�-coordinate (3) Inverse calculation can be done to obtain the current quantities in a�-coordinate from instantaneous active and reactive power. …”

Section: Three-phase Three-wire Pv-grid Systemmentioning

confidence: 99%

“…One Cycle Control can be applied to control a single phase inverter in a single stage PV -Grid System [I]. By using template modulated current in phase with respect to the grid voltage, a PV -Grid system is capable to transfer power [2]. Digital control implemented by fuzzy logic can also be applied [3].…”

Section: Introductionmentioning

confidence: 99%

Inverse Clarke Transformation based control method of a three-phase inverter for PV-Grid systems

Riyadi

2014

2014 the 1st International Conference on Information Technology, Computer, and Electrical Engineering

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A photovoltaic (PV)-Grid System integrates electric energy generated by PV modules and a grid. A Maximum Power Point Tracker (MPPT) is required due to PV characteristic. It will force the PV modules produce maximum power in the DC voltage. It is needed an inverter to convert DC into AC voltage and to match the grid voltage. A standard inverter topology used in active filtering is functioned to inject harmonic and reactive power components but it must be able to transmit active power component in PV-Grid System. Instantaneous power concept is often used to control an active power filter due to its simplicity.In this paper, a control method for a three-phase three-legs inverter is proposed. This is based on inverse ClarkeTransformation. The inverter is implemented by Voltage Source Inverter (VSI) that is operated as a controlled current source by using a current controller. Inverter output currents will be compared to references produced by inverse ClarkeTransformation. To achieve power equilibrium, the voltage of the DC-link is kept constant. The obtained results have proven that all the power generated by the PV modules can be transmitted into the grid.

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Single-Phase Single-Stage PV-Grid System Using VSI Based on Simple Control Circuit

Cited by 5 publications

References 4 publications

Lightning performance analysis of a rooftop grid-connected solar photovoltaic without external lightning protection system

Lightning performance analysis of a rooftop grid-connected solar photovoltaic without external lightning protection system

Capacitor Bank Voltage Equilibrium for MPPT in Single-Phase Single-Stage Five-Level Inverter for PV-Grid Application

Inverse Clarke Transformation based control method of a three-phase inverter for PV-Grid systems

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