Mitigation of Low-Frequency Current Ripple in Fuel-Cell Inverter Systems Through Waveform Control

Zhu, Guorong; Tan, Siew‐Chong; Chen, Yu; Tse, Chi Kong

doi:10.1109/tpel.2012.2205407

Cited by 168 publications

(81 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8 The compensator adopted is a multi-PR controller that is the combination of various PR controllers each with predetermined resonant poles (i.e., ω c1 , ω c2 …), and it can be mathematically described as (18). The poles should be selected at frequencies of which the ripple power is to be eliminated.…”

Section: ) General Transformation Methodsmentioning

confidence: 99%

“…The H-bridge converter with switches Q1-Q4 and filter components L 1 and C dc accomplishes the original functions of active power factor correction (PFC) and DC voltage regulation, while the active filter comprising switches Q5 and Q6 are controlled to divert the ripple power from the DC side into a small external storage L f or/and C f to achieve power decoupling. Typically one terminal of the storage component is connected to the mid-point of the active filter switches (connection point of Q5 and Q6), while the other terminal is tied to either the AC side [9], [18], the ground [3], [19], or one leg of the H-bridge converter [10], [14]. The voltage or current waveforms of the storage component can be unipolar or bipolar, depending on circuit configuration.…”

Section: Introductionmentioning

confidence: 99%

“…1. Examples of existing single-phase H-bridge converter with power decoupling function when storage component connects to (a) AC side [9], [18] (b)…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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.

Self Cite

116

View full text Add to dashboard Cite

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.

show abstract

Section: ) General Transformation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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.

Self Cite

116

View full text Add to dashboard Cite

show abstract

“…The reliability of the system is also affected. [11] suggests a waveform control scheme to mitigate the lowfrequency current ripple. [12] puts forward a model predictive control strategy for second order harmonic reduction which tries modifying the duty cycle to minimize the second harmonic current.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Input Ripple Current in Single Phase Fuel Cell Power Systems

Sinha¹,

Shireen²,

Pramanick³

2017

IJPER

View full text Add to dashboard Cite

Abstract. Fuel cells serve as clean, renewable and an efficient source of electrical energy. The power conditioning system associated with their applications consists of a DC-DC Converter stage and a DC-AC inverter stage. In a single-phase fuel cell system, the single-phase inverter introduces a second harmonic component in the current drawn from the fuel cell source. This low-frequency current ripple has been found to be detrimental to the performance, lifespan, and efficiency of the fuel cell, if not adequately controlled. The paper presents a single loop current control method for the DC-DC converter stage that reduces the input current ripple drawn from the source in the single-phase fuel cell system. Simulations are carried out using MATLAB; the results compared with the conventional method. To validate the proposed approach, experimental results from a laboratory prototype are presented. The proposed method uses a Digital Signal Processor for control system monitoring and control.Keywords: Fuel cell, second harmonic current ripple, DC-DC boost converter, power electronics, single phase inverter. IntroductionWith the increase in demand for electrical power generation, there has been an increase in the usage of fossil fuels. The depletion of these non-renewable sources of energy has necessitated the use of renewable energy sources, like wind energy, solar energy, fuel cells, tidal energy-to name a few. Fuel cells are one of the cleanest sources of energy and are being used for transportation, stationary and portable power applications. Since these are single-phase applications, the power conditioning system associated with the fuel cell stack is a DC-DC converter connected to a DC-AC Single Phase Inverter. The DC-AC stage introduces a second harmonic ripple current which gets imposed on the fuel cell. This low order current ripple reduces the lifetime of fuel cells, deteriorates their performance and hence, decreases the overall efficiency. It can reduce the fuel cell output power by 6% due to internal losses, and cause an increase in the distortion of its an LC series resonance circuit tuned to twice the output frequency connected in parallel to the DC bus capacitor in a pulse width modulated voltage source inverter. Similar methods of using an active filter for current ripple reduction were proposed in [9] and [10]. Although the methods mentioned above can reduce the low order ripple current efficiently, yet the addition of an external circuit, large capacitor or high-power switches may result in an increase in cost, power losses and system complexity. The reliability of the system is also affected.[11] suggests a waveform control scheme to mitigate the lowfrequency current ripple.[12] puts forward a model predictive control strategy for second order harmonic reduction which tries modifying the duty cycle to minimize the second harmonic current. Another alternative way to eliminate the ripple is to adopt a control strategy such that the DC-bus capacitor supplies the entirety of the second harmonic current,...

show abstract

“…Typically, E-caps are common selections of DC-link capacitors due to their spacesaving and cost-effective nature. However, their high failure rates substantially undermine the system's reliability [5]- [8], [11], [12]. Their limited lifetime is also highly incompatible with that of existing renewable technologies.…”

Section: Introductionmentioning

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)

View full text Add to dashboard Cite

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.

show abstract

Mitigation of Low-Frequency Current Ripple in Fuel-Cell Inverter Systems Through Waveform Control

Cited by 168 publications

References 27 publications

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

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

Mitigation of Input Ripple Current in Single Phase Fuel Cell Power Systems

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

Contact Info

Product

Resources

About