Analysis of a Single-Phase Z-Source Inverter for Battery Discharging in Vehicle to Grid Applications

Yu, Yifan; Zhang, Qianfan; Liang, Bin; Liu, Xiaofei; Cui, Shumei

doi:10.3390/en4122224

Cited by 20 publications

(17 citation statements)

References 12 publications

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“…The H-type full bridge and half bridge topologies, with the advantage of a simple structure and mature technology, are widely adopted by most of the traditional grid-connected inverters [1][2][3][4][5]. A family of five-level dual-buck full-bridge inverters with the advantages of multi-level, high reliability, and high efficiency are proposed in [11].…”

Section: Introductionmentioning

confidence: 99%

High Frequency Dual-Buck Full-Bridge Inverter Utilizing a Dual-Core MCU and Parallel Algorithm for Renewable Energy Applications

Meng¹,

Wang²,

Yang³

et al. 2017

Energies

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Abstract:A high frequency dual-buck full-bridge inverter for small power renewable energy applications is proposed in this paper. The implementation of the wide band gap SiC (Silicon Carbide) power device contributes to the high switching frequency of 400 kHz. This high frequency contributes to reduced converter volume as well as improved power density, which greatly strengthens its portability and application range. For the control strategy, a voltage-current dual loop controller is employed. A three-pole-three-zero (3P3Z) compensator is applied in the current loop in order to track the current reference without static error. A voltage loop two-pole two-zero (2P2Z) compensator is used to generate the current reference for stabilizing the DC bus voltage. Not only is the inner current loop analyzed in detail, which includes the modeling of the equivalent inductor-capacitor-inductor (LCL)-type inverter and the design of the 3P3Z compensator, but also the outer voltage loop is discussed, the model of which is established based on the energy balance. Furthermore, a feedback linearization method is adopted to simplify the duty cycle calculation and helps to accelerate the control speed. A second-order generalized integrator software phase lock loop (SOGI-SPLL) is employed to obtain the phase angle and to synchronize the inverter output current with the grid voltage. A parallel structure algorithm is conducted based on a dual-core microcontroller unit (MCU) for the first time to control the high frequency inverter. This approach avoids the contradiction between the high frequency operation and the limited computing capacity of the conventional single-core MCUs. The software structure, time-consuming distribution, and interactive communication method are analyzed in detailed. Finally, this paper verifies the feasibility of the theoretical analyses through simulation and experiments based on a 1 kW prototype.

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Section: Introductionmentioning

confidence: 99%

High Frequency Dual-Buck Full-Bridge Inverter Utilizing a Dual-Core MCU and Parallel Algorithm for Renewable Energy Applications

Meng¹,

Wang²,

Yang³

et al. 2017

Energies

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“…Therefore, a dc/dc converter with voltage regulation is used to connect with PV power systems in parallel to keep the output voltage in the desired constant dc voltage range, as shown in Figure 1. In Figure 1, the dc bus voltage can supply a dc/ac inverter for a grid-connected power system [1][2][3][4][5], a dc/dc converter for dc load [6][7][8][9][10], and so on. The dc/ac inverter and dc/dc converter are regarded as dc loads.…”

Section: Introductionmentioning

confidence: 99%

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Tseng

Wang

2013

Energies

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This paper presents a power system using a high step-up converter for dc load applications. The high step-up converter adopts a boost converter with interleaved mode and a coupled inductor to raise its powering ability and increase its step-up voltage ratio, respectively. In order to increase conversion efficiency, an active clamp circuit is introduced into the proposed one to provide soft-switching features to reduce switching losses. Moreover, switches in the converter and active clamp circuit are integrated with a synchronous switching technique to reduce circuit complexity and component counts, resulting in a lower cost and smaller volume. A perturb and observe method is adopted to extract the maximum power from photovoltaic (PV) arrays. Furthermore, a microchip associated with PWM IC is used to implement maximum power point tracking operation, voltage regulation and power management. Finally, a prototype PV power system with 400 V/6 A has been implemented for verifying the feasibility of the proposed PV power system. It is shown to be suitable for PV energy conversion applications when the duty ratios of switches in the dc/dc converter are less than 0.5.

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“…Moreover, the output voltage distortion of the inverter is reduced, since there is no need to set dead time. As a result, the Z-source inverter is widely used in wind power and other renewable energy power generation systems in recent years [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Capacitor Voltage Ripple Suppression for Z-Source Wind Energy Conversion System

2016

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This paper proposes an improved pulse-width modulation (PWM) strategy to reduce the capacitor voltage ripple in Z-source wind energy conversion system. In order to make sure that Z-source capacitor voltage has symmetrical maximum and minimum amplitudes in each active state, the shoot-through time is divided into six unequal parts. According to the active state and zero state, the shoot-through time is rearranged to match the charging time and discharging time of the Z-source capacitors. Theoretically, it is indicated that the voltage ripple of the Z-source capacitors can be reduced effectively by means of the proposed PWM scheme. Finally, simulation and experimental results are given to verify the performance of the presented method.

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Analysis of a Single-Phase Z-Source Inverter for Battery Discharging in Vehicle to Grid Applications

Cited by 20 publications

References 12 publications

High Frequency Dual-Buck Full-Bridge Inverter Utilizing a Dual-Core MCU and Parallel Algorithm for Renewable Energy Applications

High Frequency Dual-Buck Full-Bridge Inverter Utilizing a Dual-Core MCU and Parallel Algorithm for Renewable Energy Applications

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Capacitor Voltage Ripple Suppression for Z-Source Wind Energy Conversion System

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