Improved one-cycle-control scheme for three-phase active rectifiers with input inductor-capacitor-inductor filters

Tang, Yi; Loh, Poh Chiang; Wang, P.; Choo, Fook Hoong; Tan, K. K.

doi:10.1049/iet-pel.2010.0193

Cited by 30 publications

(23 citation statements)

References 28 publications

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“…In recent years, LCL filters have been widely adopted in the grid-tied converters [23][24] and the front-active rectifiers [25][26][27] to reduce the output or input current high-frequency harmonics in renewable generation system. However, in high-speed trains, the traditional L-type boost rectifiers are predominantly used as the grid-side converters.…”

Section: Introductionmentioning

confidence: 99%

High-Frequency Harmonic Resonance Suppression in High-Speed Railway Through Single-Phase Traction Converter With <italic>LCL</italic> Filter

Song

Jiao

et al. 2016

IEEE Trans. Transp. Electrific.

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High-frequency harmonic resonance has been a frequently encountered issue in railway traction power supply system (TPSS) since high-speed trains that are equipped with ac-dc-ac traction drive system were serviced in China High-Speed Railway (HSR) lines. This high-frequency harmonic resonance is excited when the frequency of harmonic components introduced by the grid-side traction ac-dc converter in trains matches the inherent resonance frequency of TPSS. Traditional solutions for this HSR high-frequency resonance focus on providing damping to the TPSS. In this work, with a focus on avoiding the resonance excitation, a solution from the trains' perspective through adoption of single-phase grid-side pulse-width-modulated (PWM) converter with LCL filter in high-speed trains is proposed. Compared with the traditional traction system topology with L-type filter, the total inductance value of LCL filter is designed to be the same with that of L-type filter and there is only an additional small capacitor adopted in the proposed solution. Therefore the design in this work meets the space and weight requirements of the traction converter system. In this work, an all-parallel 27.5-kV 50-Hz autotransformer (AT)-fed power-supply system and the proposed grid-side LCL filter based converters are modeled and simulated in real-time hardware in loop (HIL) experimental platform. The results show that the proposed solution can effectively suppress the high-frequency resonance of TPSS.

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Section: Introductionmentioning

confidence: 99%

High-Frequency Harmonic Resonance Suppression in High-Speed Railway Through Single-Phase Traction Converter With <italic>LCL</italic> Filter

Song

Jiao

et al. 2016

IEEE Trans. Transp. Electrific.

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“…A design procedure for determining the parameters of the LCL filter was subsequently discussed in [20] for SAPF controlled by a hysteresis scheme with variable switching frequency. The provided methodology, however, led to very different grid-and converter-side inductors, which were therefore not yet optimized, based on concepts discussed in [21], [22]. Moreover, only passive damping technique was considered in [20], meaning real resistors were added in series with the filter capacitors, leading to unnecessary power losses.…”

Section: Introductionmentioning

confidence: 99%

Generalized Design of High Performance Shunt Active Power Filter With Output LCL Filter

Tang

Loh

Wang

et al. 2012

IEEE Trans. Ind. Electron.

491

239

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This paper concentrates on the design, control, and implementation of an LCL-filter-based shunt active power filter (SAPF), which can effectively compensate for harmonic currents produced by nonlinear loads in a three-phase three-wire power system. With an LCL filter added at its output, the proposed SAPF offers superior switching harmonic suppression using much reduced passive filtering elements. Its output currents thus have high slew rate for tracking the targeted reference closely. Smaller inductance of the LCL filter also means smaller harmonic voltage drop across the passive output filter, which in turn minimizes the possibility of overmodulation, particularly for cases where high modulation index is desired. These advantages, together with overall system stability, are guaranteed only through proper consideration of critical design and control issues, like the selection of LCL parameters, interactions between resonance damping and harmonic compensation, bandwidth design of the closed-loop system, and active damping implementation with fewer current sensors. These described design concerns, together with their generalized design procedure, are applied to an analytical example, and eventually verified by both simulation and experimental results.

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“…As a result, this third-order passive filter brings some resonance hazards at the frequency response, which reduce the efficiency and performance of the inverter system and in the worst case even leads to closed-loop system instability. Moreover, if the inverters controller is not properly designed, the resonances may be excited by the control loop, nonlinear loads, disturbances, or transients [14,19], which certainly introduce serious power quality problems for the system. Consequently, one of the most important concerns in the grid-connected inverter system is the inherent resonance caused by the inverter output LCL-filter [10].…”

Section: )mentioning

confidence: 99%

“…where i e (z) is the regulated grid-side current error. To demonstrate the relationship between the current controller stability and the inherent resonance of the LCL filter, the detailed stability analysis based on the frequency responses of the open-loop gain has been obtained using Equation (6) in MATLAB software environment for the control system shown in Figure 4b, with the parameters given in Table 1, in which the LCL filter is mainly designed according to the criteria presented in [14][15][16][17]. Three various filter capacitor values are regarded (Table 1), which can be appropriate choices for consideration of the different regions of LCL resonant frequencies (between~6.25% and~37% of the sampling frequency).…”

Section: Stability Analysismentioning

confidence: 99%

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Capacitor Current Feedback-Based Active Resonance Damping Strategies for Digitally-Controlled Inductive-Capacitive-Inductive-Filtered Grid-Connected Inverters

et al. 2016

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Inductive-capacitive-inductive (LCL)-type line filters are widely used in grid-connected voltage source inverters (VSIs), since they can provide substantially improved attenuation of switching harmonics in currents injected into the grid with lower cost, weight and power losses than their L-type counterparts. However, the inclusion of third order LCL network complicates the current control design regarding the system stability issues because of an inherent resonance peak which appears in the open-loop transfer function of the inverter control system near the control stability boundary. To avoid passive (resistive) resonance damping solutions, due to their additional power losses, active damping (AD) techniques are often applied with proper control algorithms in order to damp the LCL filter resonance and stabilize the system. Among these techniques, the capacitor current feedback (CCF) AD has attracted considerable attention due to its effective damping performance and simple implementation. This paper thus presents a state-of-the-art review of resonance and stability characteristics of CCF-based AD approaches for a digitally-controlled LCL filter-based grid-connected inverter taking into account the effect of computation and pulse width modulation (PWM) delays along with a detailed analysis on proper design and implementation.

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Improved one-cycle-control scheme for three-phase active rectifiers with input inductor-capacitor-inductor filters

Cited by 30 publications

References 28 publications

High-Frequency Harmonic Resonance Suppression in High-Speed Railway Through Single-Phase Traction Converter With <italic>LCL</italic> Filter

High-Frequency Harmonic Resonance Suppression in High-Speed Railway Through Single-Phase Traction Converter With <italic>LCL</italic> Filter

Generalized Design of High Performance Shunt Active Power Filter With Output LCL Filter

Capacitor Current Feedback-Based Active Resonance Damping Strategies for Digitally-Controlled Inductive-Capacitive-Inductive-Filtered Grid-Connected Inverters

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