Analysis of advanced inverter topology for renewable energy generation and energy storage integration into AC grid

Kroics, Kaspars; Zemite, L.; Gaigals, Gatis

doi:10.22616/erdev2017.16.n192

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…There are several topologies of the impedance network (Z source) that can be used, the quasi Z source topology allows eliminate discontinuous current mode that in many cases gives advantages. Quasi Z source network more often is used in DC-DC converters [19][20][21][22][23][24] or in DC-AC inverters to produce sinusoidal voltage [25][26][27]. The Z-source or quasi Z-source converters for WPT are analyzed in [28][29][30][31][32][33], the converter is used for both inductive and capacitive power transfer, also for Power Factor Correction (PFC) [34].…”

Section: Fig 5 Quasi Z Source Resonant Converter For Wptmentioning

confidence: 99%

Simulation based analysis of quasi Z-source converter for wireless power transfer

Kroics

2019

Engineering for Rural Development

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Implementation of Wireless Power Transfer (WPT) allows avoid connection by using wires to transfer energy between the power source and load. This allows development of devices that are more users friendly and easy in the exploitation. Elimination of the galvanic connection between the charging station and the energy consumer simplifies the charging process and removes safety concerns. In this paper an insight is given into basics of WPT theory to show why often an additional DC-DC converter at the WPT converter input is used and why the Z-source converter can be useful for this application. It is explained why application of an additional converter can give additional increase of the efficiency. The paper presents deeper analysis of scientific papers about Z-source network application in WPT systems that allows eliminate utilization of the additional converter but allows to regulate the input voltage. In the paper simplified explanation of quasi Z-source converter operation in boost mode is given. Based on this explanation it is easier to understand operation of the quasi Zsource converter and usefulness of application of this topology in WPT applications. Simulation of the quasi Zsource based WPT converter is performed and the simulation resulting waveforms show that it is possible to regulate the DC bus voltage and supply the energy to the system output with Z-source based WPT simultaneously, without adding extra semiconductor devices and very complex control circuitry to the conventional WPT system. These simulation results show that the quasi Z-source converter for WPT can regulate the DC bus voltage and transfer power to the load with relatively simple control. The waveforms of the control signals and current, and voltage waveforms are given. The Z-source topology analysed in this paper offers significant benefits, therefore, scientific research to improve and optimize this topology is needed further in order to meet the EMI standards, reduce switching losses with implementation of soft switching, optimize passive components, develop new control strategies and to increase the system efficiency. By overcoming these issues, the Z-source topology can become very attractive for WPT systems.

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Section: Fig 5 Quasi Z Source Resonant Converter For Wptmentioning

confidence: 99%

Simulation based analysis of quasi Z-source converter for wireless power transfer

Kroics

2019

Engineering for Rural Development

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“…The problems of PV technology deployment in these countries are reflected in the scientific literature (a comprehensive review of this literature is given in the articles [13,[30][31][32][33][34][35][36]. However, as far as we know, no assessment of the joint effect of load, solar activity, market price profiles, and the rules for the formation of consumers' accounts on their financial efficiency has been conducted.…”

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Estimating the Economic Impacts of Net Metering Schemes for Residential PV Systems with Profiling of Power Demand, Generation, and Market Prices

et al. 2018

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This article analyses the influence of supporting scheme variants on the profitability of a projected investment of residential photovoltaic systems. The focus of the paper lies in evaluating the feasibility for the power system of solar power generation technologies to achieve a balance between energy generation and support costs in a more efficient way. The case study is based on a year-long time series of examples with an hourly resolution of electricity prices from the Nord Pool power market, in addition to the power demand and solar generation of Latvian prosumers. Electric energy generation and the consumption of big data from more than 100 clients were collected. Based on these data, we predict the processes for the next 25 years, and we estimate economic indicators using a detailed description of the net metering billing system and the Monte-Carlo method. A recommendation to change the current net system to a superior one, taking into account the market cost of energy, concludes the paper.

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Mutual Control of Interleaved and Single Phase DCDC Converters for Improved Light Load Efficiency and Peak Power Increase

Gaspersons,

Kroičs

2023

2023 International Conference on Electrical Drives and Power Electronics (EDPE)

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Analysis of advanced inverter topology for renewable energy generation and energy storage integration into AC grid

Cited by 10 publications

References 24 publications

Simulation based analysis of quasi Z-source converter for wireless power transfer

Simulation based analysis of quasi Z-source converter for wireless power transfer

Estimating the Economic Impacts of Net Metering Schemes for Residential PV Systems with Profiling of Power Demand, Generation, and Market Prices

Mutual Control of Interleaved and Single Phase DCDC Converters for Improved Light Load Efficiency and Peak Power Increase

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