Analysis of the Response of L and LCL Filters in Controlled Rectifiers used in Wind Generator Systems with Permanent Magnet Synchronous Generators

Vidal, Jose David; Carranza, O.; Rodriguez, J. J.; González, L.G.; Ortega, R.

doi:10.1109/tla.2018.8528228

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…Mathematical model is derived in (31) after applying Kirchhoff voltage and current laws. Also, (32) gives filter transfer function.…”

Section: Mhmentioning

confidence: 99%

Examining the impacts of DM filters to PFC isolated Ćuk converter for DCM operation by comparing Si and SiC MOSFET

Şehirli

2023

Sci Rep

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Examining impacts of differential mode (DM) filter topologies covering pi, LC with damping, LC, LCL filter through isolated Ćuk single phase PFC converter is realized in this paper regarding to power factor, THD and efficiency. Application of PFC isolated Ćuk converter is conducted with 42 kHz switching frequency and 50 W power. Each filter is modeled, designed, and applied experimentally via isolated PFC Ćuk converter. Average model derivation based on state-space, for DCM operation of input side inductor of isolated PFC Ćuk converter that is not introduced in literature is the main contribution of the paper. Second main contribution is to analyze filter types by linear methods for the transfer functions cascading the converter and filter transfer functions, which is not presented for PFC converters. It is also presented that solely LCL filter which is not analyzed for PFC converters in detail in literature, does not give desired results. So, increasing the effectivity of LCL filter, new filter structure LCL with parallel C filter is proposed and modeled in this paper. Thanks to the applications, presented results of LCL with parallel C filter is better than others with 4.9% current THD and ‘1’ power factor. Proposed LCL filter ensures 45% reduction of total inductor value, comparing to LC filter. Besides, LCL with C filter provides better control characteristics with maximum allowable gain for stability as 0.7585 higher than other topologies. Moreover, practical design methodology of filter types avoiding complex mathematical procedure is given in this paper. Applications with each filters provide THD requirements, obtained 4.9% as a best value, lower than IEC61000-3-2 standard. Maximum percentage improvement comparing to the IEC61000-3-2 is 27.5% for third harmonic. Furthermore, SiC and Si Mosfets are employed separately in the converter and compared by using each DM filters regarding to power factor, THD, efficiency through applications. As a result, better efficiency with SiC Mosfet as 83% and better THD with Si Mosfet as 4.9% are conducted.

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“…Mathematical model is derived in (31) after applying Kirchhoff voltage and current laws. Also, (32) gives filter transfer function.…”

Section: Mhmentioning

confidence: 99%

Examining the impacts of DM filters to PFC isolated Ćuk converter for DCM operation by comparing Si and SiC MOSFET

Şehirli

2023

Sci Rep

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“…After cascading the transfer function of the LCL filter given in (31) by using the passive value in Table 2, with the transfer function of the isolated Ćuk DC-DC converter in (36) the cascaded transfer function is obtained in (39).  …”

Section: Lcl Filtermentioning

confidence: 99%

“…Bode and root locus graphs can be sketched as in Fig. 19 by using the cascaded transfer function given in (39). It is observed by root locus that the maximum gain for stability of the controller is 0.0175.…”

Section: Lcl Filtermentioning

confidence: 99%

“…[38] compares LC, LCL, and LCL with damping resistor by simulation study for a single phase inverter and it shows that the LCL with damping filter provides optimum efficiency. L and LCL with damping filters are compared in [39], [40] with a three phase PWM rectifier by simulation and [39] shows that the L filter gives better performance with respect to THD and efficiency, while [40] states that the LCL filter provides lower total inductance and higher power loss on the damping resistor. [41], [42] compare L, LC, and LCL filters in a simulation study for inverter applications and it is concluded that the LCL filter provides better attenuation with lower inductance.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of LCL Filter Topologies for DC-DC Isolated Cuk Converter at CCM Operation

Şehirli

2022

IEEE Access

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In this study, the application and analysis of LCL filter topologies including an LCL, an LCL with damping, and an LCL trap filter used by a DC-DC isolated Ćuk converter operated at CCM are presented. The converter is designed for 50 W with 42 kHz switching frequency using a SiC MOSFET as a power switch. Although LCL filter topologies are commonly used with an inverter, their use in DC-DC converters has not been studied in detail. The main contribution of the paper is the application, design, and analysis of an LCL trap filter, which is not presented for a DC-DC converter in the literature, as an input filter of a DC-DC isolated Ćuk converter. For exact analysis of the effect of the filter, as a second main contribution of the paper, a state-space average mathematical model, small signal analysis of an isolated Ćuk converter for CCM operation, which was not presented before in the literature, is derived and its transfer function is obtained. In this paper, the practical design and transfer functions of LCL-based filter topologies are also presented. In order to analyze the effect of filter topologies by using linear methods including root locus and Bode graphs, the transfer function of the converter is cascaded with the transfer function of each filter separately, which is the third contribution of the paper because such analysis has not been presented in the literature. Furthermore, each cascaded transfer function and the transfer function of the converter are validated by step responses. All LCL filters, with an LC filter for comparison, are employed in the experimental setup. Owing to the applications, control characteristics and input current ripples are measured. In addition, the efficiencies of each different structure are determined. As a result of the analysis and measurements, the LCL trap filter gives better results in terms of efficiency (86%) and input current ripple (0.96 A peak). Moreover, the LCL with damping filter gives poorer control characteristics, but the maximum gain of the controller avoiding the instability of LCL with damping is 0.0855, which is higher than that of the others. Furthermore, it is shown that each LCL filter topology provides a 45% lower total inductor value compared to the LC filter.

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“…In recent years, direct-drive wind turbines (DDWTs) have been widely used due to their advantages such as gearless box, low failure rate and high power generation efficiency, and are considered to be the most promising development targets in the megawatt variable-speed constant-frequency wind turbine types [1][2][3][4][5][6][7]. However, when the direct-drive wind farm (DDWF) is connected to the power grid, harmonic interaction will occur between the current control loops of different DDWTs due to the presence of grid impedance, which will deteriorate the output power quality and adversely affect the normal operation of the wind farm.…”

Section: Introductionmentioning

confidence: 99%

Analysis and verification of harmonic interaction between DDWTs based on αβ stationary coordinate system

Han

Wang

Dou

et al. 2020

IET Generation, Transmission & Distribution

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Analysis of the Response of L and LCL Filters in Controlled Rectifiers used in Wind Generator Systems with Permanent Magnet Synchronous Generators

Cited by 6 publications

References 12 publications

Examining the impacts of DM filters to PFC isolated Ćuk converter for DCM operation by comparing Si and SiC MOSFET

Examining the impacts of DM filters to PFC isolated Ćuk converter for DCM operation by comparing Si and SiC MOSFET

Analysis of LCL Filter Topologies for DC-DC Isolated Cuk Converter at CCM Operation

Analysis and verification of harmonic interaction between DDWTs based on αβ stationary coordinate system

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