An Active Low-Frequency Ripple Control Method Based on the Virtual Capacitor Concept for BIPV Systems

Cai, Wen; Liu, Bangyin; Duan, Shanxu; Jiang, Laizhu

doi:10.1109/tpel.2013.2271247

Cited by 117 publications

(47 citation statements)

References 26 publications

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“…3 [19]. In [11], [20]- [23], a high-pass filter, a neural filter and a virtual-capacitor-based control is applied to is to exact the AC component .…”

Section: B Sensing and Controlmentioning

confidence: 99%

A plug-and-play ripple mitigation approach for DC-links in hybrid systems

Lee

Siew-Chong-Tan

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-In this paper, a plug-and-play ripple mitigation technique is proposed. It requires only the sensing of the DClink voltage and can operate fully independently to remove the low-frequency voltage ripple. The proposed technique is nonintrusive to the existing hardware and enables hot-swap operation without disrupting the normal functionality of the existing power system. It is user-friendly, modular and suitable for plug-and-play operation. The experimental results demonstrate the effectiveness of the ripple-mitigation capability of the proposed device. The DC-link voltage ripple in a 110 W miniature hybrid system comprising an AC/DC converter and two resistive loads is shown to be significantly reduced from 61 V to only 3.3 V. Moreover, it is shown that with the proposed device, the system reliability has been improved by alleviating the components' thermal stresses.Keywords-Plug-and-play ripple mitigation, ripple pacifier, DC-link, AC/DC power system.

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“…3 [19]. In [11], [20]- [23], a high-pass filter, a neural filter and a virtual-capacitor-based control is applied to is to exact the AC component .…”

Section: B Sensing and Controlmentioning

confidence: 99%

A plug-and-play ripple mitigation approach for DC-links in hybrid systems

Lee

Siew-Chong-Tan

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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“…The designer has to use large capacitor or high-voltage power switching devices in case of triggering over the voltage protection or malfunction of the inverter during transients. A solution to reduce the 2-f voltage ripple is to connect the energy storage elements to the bus through an active low-frequency ripple control device (ALFRCD), which injects harmonic current into the DC bus [8,9]. This approach solves the problem by essentially eliminating the ripple at the bus voltage, while using a minimal bus capacitor.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement for Two-Stage Single-Phase Grid-Connected Converters Using a Fast DC Bus Control Scheme and a Novel Synchronous Frame Current Controller

Huang

Chen

2017

Energies

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Two-stage single-phase grid-connected converters are widely used in renewable energy applications. Due to the presence of a second harmonic ripple across the DC bus voltage, it is very challenging to design the DC bus voltage control scheme in single-phase grid-connected inverters. The DC bus voltage controller must filter the ripple and balance a tradeoff between low harmonic distortion and high bandwidth. This paper presents a fast DC bus voltage controller, which uses a second order digital finite impulse response (FIR) notch filter in conjunction with input power feedforward scheme to ensure the steady-state and dynamic performance. To gain the input power without extra hardware, a Kalman filter is incorporated to estimate the DC bus input current. At the same time, a modulation compensation strategy is implemented to eliminate the nonlinearity of the grid current control loop, which is caused by the DC bus voltage ripple. Moreover, a novel synchronous frame current controller for single-phase systems is also introduced, and its equivalent model in stationary frame has been derived. Simulation and experimental results are provided to verify the effective of the proposed control scheme.

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“…The growing use of emerging technologies such as LED lightings, distributed photovoltaic (PV) systems, electric vehicle (EV) charging systems, etc., is placing high reliability, high power density and low-cost single-phase AC/DC power conversion systems in great demand [1]- [4]. A well-known issue in conventional single-phase AC/DC systems is that there is a power difference between the AC and DC side, which varies at twice the line frequency.…”

Section: Introductionmentioning

confidence: 99%

Integration of an Active Filter and a Single-Phase AC/DC Converter With Reduced Capacitance Requirement and Component Count

Tan

et al. 2016

IEEE Trans. Power Electron.

118

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Abstract-Existing methods of incorporating an active filter into an AC/DC converter for eliminating electrolytic capacitors usually require extra power switches. This inevitably leads to an increased system cost and degraded energy efficiency. In this paper, a concept of active-filter integration for singlephase AC/DC converters is reported. The resultant converters can provide simultaneous functions of power factor correction (PFC), DC voltage regulation and active power decoupling for mitigating the low-frequency DC voltage ripple, without an electrolytic capacitor and extra power switch. To complement the operation, two closed-loop voltage-ripple-based reference generation methods are developed for controlling the energy storage components to achieve active power decoupling. Both simulation and experiment have confirmed the eligibility of the proposed concept and control methods in a 210 W rectification system comprising an H-bridge converter with a half-bridge active filter. Interestingly, the end converters (Type I and Type II) can be readily available using a conventional H-bridge converter with minor hardware modification. A stable DC output with merely 1.1% ripple is realized with two 50 μF film capacitors. For the same ripple performance, a 900 μF capacitor is required in conventional converters without an active filter. Moreover, it is found out that the active-filter integration concept might even improve the efficiency performance of the end converters as compared with the original AC/DC converter without integration.

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An Active Low-Frequency Ripple Control Method Based on the Virtual Capacitor Concept for BIPV Systems

Cited by 117 publications

References 26 publications

A plug-and-play ripple mitigation approach for DC-links in hybrid systems

A plug-and-play ripple mitigation approach for DC-links in hybrid systems

Performance Improvement for Two-Stage Single-Phase Grid-Connected Converters Using a Fast DC Bus Control Scheme and a Novel Synchronous Frame Current Controller

Integration of an Active Filter and a Single-Phase AC/DC Converter With Reduced Capacitance Requirement and Component Count

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