Energy Balancing With Wide Range of Operation in the Isolated Multi-Modular Converter

Vladu, Ionel Cristian; Candela, José Ignacio; Rodríguez, Pedro

doi:10.1109/access.2020.2992227

Cited by 7 publications

(9 citation statements)

References 24 publications

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“…where E on and E off are the energy used by the switches. The total power losses (P total loss ) is calculated: P total loss = P cl + P sl (17) The efficiency (ï) is calculated using the following relation ï = P out P in = P out P out + P loss (18) where P out and P in are the output and input powers.…”

Section: Power Loss and Efficiencymentioning

confidence: 99%

“…The current multilevel inverter topologies comprise a smaller number of components used in the circuit compared with the conventional inverters such as flying capacitor type (FC) [14], cascaded H-bridge type (CHB) [15] and the neutral point clamped type (NPC) [16]. The number of components in the circuit is directly proportional to the number of levels in MLI, which increases cost and complex structure [17]. In both the FC MLI and NPC MLI, the capacitor voltage balancing is a challenging task with which these are limited to five-level and unable to cascade.…”

mentioning

confidence: 99%

“…Multilevel inverters are divided into isolated and nonisolated. Isolated inverters are designed with external DC sources, whereas non-isolated inverters are designed with a single source [17]. Further, Isolated inverters are divided into symmetrical and asymmetrical configurations.…”

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confidence: 99%

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A Novel Asymmetrical 21-Level Inverter for Solar PV Energy System With Reduced Switch Count

et al. 2021

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This article presents a novel asymmetrical 21-level multilevel inverter topology for solar PV application. The proposed topology achieves 21-level output voltage without H-bridge using asymmetric DC sources. This reduces the devices, cost and size. The PV standalone system needs a constant DC voltage magnitude from the solar panels, maximum power point tracking (MPPT) technique used for getting a stable output by using perturb and observe (P&O) algorithm. The PV voltage is boosted over the DC link voltage using a three-level DC-DC boost converter interfaced in between the solar panels and the inverter. The inverter is tested experimentally with various combinational loads and under dynamic load variations with sudden load disturbances. Total standing voltage with a cost function for the proposed MLI is calculated and compared with multiple topologies published recently and found to be cost-effective. A detailed comparison is made in terms of switches count, and sources count, gate driver boards, the number of diodes and capacitor count and component count level factor with the same and other levels of multilevel inverter and found to be the proposed topology is helpful in terms of its less TSV value, devices count, efficient and costeffective. In both simulation and experimental results, total harmonic distortion (THD) is observed to be the same and is lower than 5% which is under IEEE standards. A hardware prototype is implemented in the laboratory and verified experimentally under dynamic load variations, whereas the simulations are done in MATLAB/Simulink. INDEX TERMS Multilevel inverter, photovoltaic (PV) system, maximum power point tracking (MPPT), cost function (CF), TSV calculation, total harmonic distortion (THD).

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Section: Power Loss and Efficiencymentioning

confidence: 99%

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confidence: 99%

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A Novel Asymmetrical 21-Level Inverter for Solar PV Energy System With Reduced Switch Count

et al. 2021

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“…The main work of the pump is to suck the water from the sea. This process can be done by both open and closed loop system [22][23][24][25][26][27][28][29][30]. The developed system also reduces the THD as illustrated in Figures 14 and 15.…”

Section: Experimental Analysismentioning

confidence: 99%

Fuzzy Logic Control for Solar PV Fed Modular Multilevel Inverter Towards Marine Water Pumping Applications

Stonier¹,

Murugesan²,

Samikannu

et al. 2021

IEEE Access

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The paper presents the design of Modular Multilevel Inverter (MMI) to control the Induction Motor (IM) drive using intelligent techniques for marine water pumping applications. The proposed inverter is of eleven level and has the ability to control the speed of an IM drive which is fed by solar photovoltaic's. It is estimated that the energy consumed by pumping schemes onboard ship is nearly 50% of the total energy. Considering this fact, the paper investigate and validates the proposed control design with reduced complexity intended for marine water pumping system employing an induction motor (IM) drive and MMI. The analysis of inverter is carried out with Proportional-Integral (PI) and Fuzzy Logic (FL) based controllers for improving the performance. A comparative analysis has been made with respect to better robustness in terms of peak overshoot, settling time of the controller and Total Harmonic Distortion (THD) of the inverter to show the effectiveness of the proposed scheme. Simulations are undertaken in MATLAB/Simulink and the detailed experimental implementation in real time with Field Programmable Gate Array (FPGA). The results thus obtained are utilized to analyze the controller performance, improved inverter output voltage, reliable induction motor speed control and power quality improvement by reduction of harmonics. The novelty of the proposed control scheme is the design and integration of MMI, IM drive and intelligent controller exclusively for marine water pumping applications.

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“…It was firstly introduced to control the rigid body of active magnetic bearings, which provided a new view on the closed loop control [11]. Up to now, the application areas based on such a principle covered stability control of power systems, hamiltonian system, photovoltaic systems, active power filters, converters and so on [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Improved Energy Balance Control for Boost Converters Without Estimating Circuit Energy Losses

Wang

Tang

2020

IEEE Access

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The previously developed control methods based on the conservation of energy in circuits require the accurate estimation of energy losses, which is difficult to measure and calculate for boost converters. Consequently, there always exist steady-state errors in the output voltage if neglecting such circuit energy losses. To address this issue, an improved energy balance control (IEBC) method is proposed in this paper by integrating a simplified energy balance controller (SEBC) with a PI controller. The proposed IEBC can reduce the steady-state output voltage errors without requiring the estimation of circuit energy losses. Furthermore, the proposed IEBC can operate in both the continuous current mode (CCM) and the discontinuous current mode (DCM), thus accurate static and fast dynamic performances are achieved over the entire load operation range. Moreover, the stability of the IEBC is proved using the Lyapunov stability criterion. Compared with that of the SEBC, both simulations and experiments validate the feasibility and robustness of the proposed IEBC method.

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Energy Balancing With Wide Range of Operation in the Isolated Multi-Modular Converter

Cited by 7 publications

References 24 publications

A Novel Asymmetrical 21-Level Inverter for Solar PV Energy System With Reduced Switch Count

A Novel Asymmetrical 21-Level Inverter for Solar PV Energy System With Reduced Switch Count

Fuzzy Logic Control for Solar PV Fed Modular Multilevel Inverter Towards Marine Water Pumping Applications

Improved Energy Balance Control for Boost Converters Without Estimating Circuit Energy Losses

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