Isolated DC to Single-phase AC Converter with Active Power Decoupling Capability for Battery Storage System

Takaoka, Nagisa; Watanabe, Hiroki; Itoh, Jun‐ichi

doi:10.1109/icrera47325.2019.8996545

Cited by 6 publications

(9 citation statements)

References 13 publications

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“…Assuming that the energy source provides pure DC voltage (i.e., vS ≈ VS), and the output current of the energy source can be derived as follows: According to (7), the double-line-frequency ripple power generated by the single-phase DC/AC conversion system was completely reflected on the current provided by the energy source. As a result, the current ripple would suffer the performance of the energy source and substantially reduce its service life [27][28][29][30]. Figure 3b illustrates the key waveforms of the single-phase DC/AC conversion system after the integration of the ARF.…”

Section: Principle Of Double-line-frequency Instantaneous Powermentioning

confidence: 99%

Development of a DC-Side Direct Current Controlled Active Ripple Filter for Eliminating the Double-Line-Frequency Current Ripple in a Single-Phase DC/AC Conversion System

Chen

Lai

et al. 2020

Energies

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The objective of this paper is to propose an active ripple filter (ARF) using the patented DC-side direct current control for eliminating the double-line-frequency current ripple in a single-phase DC/AC conversion system. The proposed ARF and its control strategies can not only prolong the usage life of the DC energy source but also improve the DC/AC system performance. At first, the phenomena of double-line-frequency current ripple and the operation principle of the ARF are illustrated. Then, steady-state analysis, small-signal model, and control loop design of the ARF architecture are derived. The proposed control system includes: (1) a DC current control loop to provide the excellent ripple eliminating performance on the output of the DC energy source; (2) a voltage control loop for the high-side DC-bus voltage of the ARF to achieve good steady-state and transient-state responses; (3) a voltage feedforward loop for the low-side voltage of the ARF to cancel the voltage fluctuation caused by the instability of the DC energy source. Finally, the feasibility of the proposed concept can be verified by the system simulation, and the experimental results show that the nearly zero double-line-frequency current ripple on the DC-side in a single-phase DC/AC conversion system can be achieved.

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Section: Principle Of Double-line-frequency Instantaneous Powermentioning

confidence: 99%

Development of a DC-Side Direct Current Controlled Active Ripple Filter for Eliminating the Double-Line-Frequency Current Ripple in a Single-Phase DC/AC Conversion System

Chen

Lai

et al. 2020

Energies

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“…However, the lifetime of electrolytic capacitors is approximately 10 years, which is an obstacle to extending the lifetime of the PV system. Many studies have proposed an active power decoupling (APD) method to extend the lifetime of the PV system (1) − (14) . The APD method uses film capacitors and suppresses the DC voltage ripple to extend the lifetime of the PV system.…”

Section: Introductionmentioning

confidence: 99%

Active Power Decoupling Control for Single-phase Power Conditioning Systems Focusing on Harmonic Voltage

Sekiguchi

Wãda

2023

IEEJ Journal IA

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Active power decoupling (APD) method has been studied to enhance the lifetime of residential photovoltaic (PV) power generation systems. In single-phase inverter, the DC voltage has a ripple due to the propagation of the 2nd power pulsation from the fundamental voltage and current. The APD method suppresses the DC voltage ripple by compensating for the power pulsation. However, a single-phase grid voltage contains harmonic components and power pulsation from these harmonics, which can propagate to the DC side. Conventional APD control compensates for the 2nd power pulsation only from the fundamental components, and thus cannot suppress the DC voltage ripple caused by the harmonic components. Therefore, this paper proposes control strategies for APD method that can compensate for the power pulsation caused by both fundamental and harmonic components. Furthermore, the effectiveness of the APD control is verified using a 400 W power conditioning system.

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“…In such systems, the main challenges are mostly associated with providing voltage step-up from a low-voltage energy source, like a battery or to provide galvanic isolation as a safety measure, such as required in EV charging. Typically, to achieve demanded functionality, a two-stage power electronic system is used (Figure 1a) [29][30][31][32][33]. Variable input DC voltage is first stabilized at a DC-link capacitor by a DC-DC converter that often features a high-frequency (HF) transformer (HFT) for both voltages matching and the galvanic isolation.…”

Section: Introductionmentioning

confidence: 99%

“…It is then followed by an inverter stage that converts the stabilized DC voltage of the appropriate level into the AC voltage. These systems offer a good regulation range and are widely used in practical applications [29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the topologies with unified HF AC to LF AC stage are performing AC-AC conversion directly, using bidirectional semiconductor switches, which is a distinctive feature of matrix converters [54]. In the literature, such systems are also referred to as HF-link inverters [39,52], cycloconverters [43,48] or single-stage inverters (converters) [30,32], but are all considered as isolated matrix inverters in this review. These systems are often capable of transferring power in both directions and can achieve soft switching conditions in semiconductors with advanced modulation methods [46][47][48][49][50][51][52][53][54][55][56].…”

Section: Introductionmentioning

confidence: 99%

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Review of Isolated Matrix Inverters: Topologies, Modulation Methods and Applications

et al. 2020

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This paper presents a review of isolated matrix inverters. The study contributes to creating a point of reference for a comprehensive classification of existing solutions. Over 30 topologies were reviewed, and the main advantages and disadvantages discussed. Applications of isolated matrix inverters are summarized in a tabular form to demonstrate their flexibility for different power and voltage levels achieved due to the presence of a transformer. These inverters have been proposed for the uninterruptible power supplies, high and low-voltage/power photovoltaic systems, low-power fuel cell, different low- and high-voltage battery and/or electric vehicle chargers, audio amplifiers. The fully controlled switches on both terminals of these converters typically can provide the bidirectional power transfer capability, which is also addressed for most of the topologies, but requires some modification in their modulation strategy. Average efficiency of today’s isolated matrix inverters is comparable with the two-stage power converters; however, they can provide higher reliability and lower cost.

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Isolated DC to Single-phase AC Converter with Active Power Decoupling Capability for Battery Storage System

Cited by 6 publications

References 13 publications

Development of a DC-Side Direct Current Controlled Active Ripple Filter for Eliminating the Double-Line-Frequency Current Ripple in a Single-Phase DC/AC Conversion System

Development of a DC-Side Direct Current Controlled Active Ripple Filter for Eliminating the Double-Line-Frequency Current Ripple in a Single-Phase DC/AC Conversion System

Active Power Decoupling Control for Single-phase Power Conditioning Systems Focusing on Harmonic Voltage

Review of Isolated Matrix Inverters: Topologies, Modulation Methods and Applications

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