Design optimization of grid-connected PV inverters

Koutroulis, Eftichios; Blaabjerg, Frede

doi:10.1109/apec.2011.5744671

Cited by 27 publications

(7 citation statements)

References 38 publications

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“…[P lps,j (t, y) + P ld,j (t, y)] (9) where T A (t, y) ( • C) is the PV inverter ambient temperature at hour t (1 ≤ t ≤ 8760) of year y (1 ≤ y ≤ n), θ jc,ps and θ jc,d ( • C/W) are the thermal resistance from the junction to the case of the power switches and free-wheeling diodes, respectively, θ ca ( • C/W) is the thermal resistance of the heat sink, and P lps,i and P ld,i (W) are the total power loss (including conduction and switching power losses) of the ith (1 ≤ i ≤ p) power switch and free-wheeling diode, respectively.…”

Section: Pv Inverter Modeling For Optimization Including Reliabimentioning

confidence: 99%

“…), maximizing the amount of energy injected into the electric grid, and increasing its relia- bility by minimizing the number of failures of the PV system components which occur during the operational lifetime period of the PV installation [6], [7]. The energy injected into the electric grid can be maximized by applying an effective maximum power point tracker (MPPT) control strategy [8] and designing the PV inverter such that the PV array output power is efficiently processed by the PV inverter [9]. The reliability characteristics of the PV system components are usually expressed using indices such as the failure rate or the mean time between failures (MTBF) [7].…”

Section: Introductionmentioning

confidence: 99%

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Design Optimization of Transformerless Grid-Connected PV Inverters Including Reliability

Koutroulis

Blaabjerg

2013

IEEE Trans. Power Electron.

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194

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This paper presents a new methodology for optimal design of transformerless photovoltaic (PV) inverters targeting a cost-effective deployment of grid-connected PV systems. The optimal switching frequency as well as the optimal values and types of the PV inverter components is calculated such that the PV inverter LCOE generated during the PV system lifetime period is minimized. The LCOE is also calculated considering the failure rates of the components, which affect the reliability performance and lifetime maintenance cost of the PV inverter. A design example is presented, demonstrating that compared to the nonoptimized PV inverter structures, the PV inverters designed using the proposed optimization methodology exhibit lower total manufacturing and lifetime maintenance cost and inject more energy into the electricgrid and by that minimizing LCOE.Index Terms-DC-AC power conversion, failure analysis, optimization methods, photovoltaic (PV) power systems, reliability.

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Section: Pv Inverter Modeling For Optimization Including Reliabimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design Optimization of Transformerless Grid-Connected PV Inverters Including Reliability

Koutroulis

Blaabjerg

2013

IEEE Trans. Power Electron.

Self Cite

194

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show abstract

“…3. Depending on the PV system application domain, a Buck-type DC/DC power converter is used to interface the PV array output power to either a battery bank or a DC/AC inverter connected to the electric grid [30,31]. Both of these alternative types of DC/DC converter load are represented in Fig.…”

Section: The Proposed Global Mppt Systemmentioning

confidence: 99%

A New Technique for Tracking the Global Maximum Power Point of PV Arrays Operating Under Partial-Shading Conditions

Koutroulis

Blaabjerg

2012

IEEE J. Photovoltaics

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401

162

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“…Hence, DCto-DC converters are beneficial in the case that the voltage between the primary sources of photovoltaic panels and DC-link (or the DC load) remain unstable. Such inverters need be with maximum power point tracking (MPPT) features [6,7] for optimizing the amount of electrical energy harvested from the photovoltaic array to DC-link (Common Coupling Point of Micro-Grid) or the DC load [8].…”

Section: Introductionmentioning

confidence: 99%

Wide Range Modulation Indexes Featured Carrier-Based PWM Stepped Waveform for Half-Bridge Modular Multilevel Converters

Tohtayong

Khan

Yaacob

et al. 2018

IIUMEJ

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This paper presents simulation results of the influence of wide range modulation index values ( ) in carrier-based PWM strategy for application in generating the stepped waveform. The waveform is tested for application in single-phase half-bridge modular multilevel converters (MMCs) topology. The results presented in this paper include a variation of the fundamental component (50 Hz) in the voltage output. It also studies total harmonic distortion of the output voltage (THDv) and the output current (THDi) when the modulation index is changed over the linear-modulation region, 0 < < 1. It also explores the effect of a modulation index greater than 1. Moreover, different output voltage shapes, as a consequence of varied on MMCs, are also illustrated for showing the effect of varying the value of on sub-module of MMCs. ABSTRAK: Kajian ini berkenaan tentang pengaruh simulasi terhadap pelbagai nilai indeks ( ) berasaskan strategi PWM bagi menghasilkan bentuk gelombang bertingkat. Bentuk gelombang ini diuji untuk aplikasi topologi MMCs. Keputusan menunjukkan variasi pada komponen asas (50Hz) pada voltan akhir. Keputusan menunjukkan jumlah penyelarasan harmonik voltan akhir (THDv) dan arus (THDv) apabila indeks modulasi telah ditukar pada had modulasi linear, 0 < < 1. Ia juga membincangkan tentang kesan indeks modulasi lebih daripada 1. Selain itu, bentuk voltan akhir yang berbeza mengikut perubahan nilai pada MMCs juga dilampirkan bagi menunjukkan kesan perbezaan nilai pada sub-modul MMCs.

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Design optimization of grid-connected PV inverters

Cited by 27 publications

References 38 publications

Design Optimization of Transformerless Grid-Connected PV Inverters Including Reliability

Design Optimization of Transformerless Grid-Connected PV Inverters Including Reliability

A New Technique for Tracking the Global Maximum Power Point of PV Arrays Operating Under Partial-Shading Conditions

Wide Range Modulation Indexes Featured Carrier-Based PWM Stepped Waveform for Half-Bridge Modular Multilevel Converters

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