The Experts below are selected from a list of 28092 Experts worldwide ranked by ideXlab platform
Hanying Gao - One of the best experts on this subject based on the ideXlab platform.
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an improved droop control method for voltage source inverter parallel systems considering Line Impedance differences
Energies, 2019Co-Authors: Xudong Wang, Jinfeng Liu, Hanying GaoAbstract:In this paper, the effect of the Line Impedance difference between various inverters on power sharing with the traditional droop control method is fully analyzed. It reveals that the Line Impedance difference causes a significant reactive power error. An improved droop control method to eliminate the reactive power errors caused by the Line Impedance errors is proposed. In the proposed method, a voltage compensation determined by the actual reactive power error between the local inverter and the average one is added into the local voltage reference based on the CAN communication. Even when the communication is interrupted, the controller will operate with the last value of the average power, which still outperforms the traditional method. The effectiveness of the proposed control method is verified by simulation and experimental results, which show the proposed method possesses the better power sharing performance and dynamic response.
Dushan Boroyevich - One of the best experts on this subject based on the ideXlab platform.
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common mode voltage in dc fed motor drive system and its impact on the emi filter
Applied Power Electronics Conference, 2010Co-Authors: Shuo Wang, Nicolas Gazel, Fred Wang, Dushan Boroyevich, Yong KangAbstract:Common mode (CM) choke saturation is a practical problem in common-mode filter applications. It's generally believed that the leakage inductance of common-mode chokes makes the core saturated. This paper analyzes two new mechanisms for common-mode choke saturation due to common-mode voltage, and these mechanisms are verified in experiment. Common-mode choke saturation is particularly important for motor drive systems, which have a high common-mode voltage and comparably higher stray grounding capacitance. A model is established to describe the relationship between the common-mode voltage and the volume of the common-mode magnetic components. According to the analysis, LISNs (Line Impedance stabilization networks) play an important role in the design of CM magnetic components.
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analysis of cm volt second influence on cm inductor saturation and design for input emi filters in three phase dc fed motor drive systems
IEEE Transactions on Power Electronics, 2010Co-Authors: Shuo Wang, Nicolas Gazel, Yong Kang, Dushan Boroyevich, Fei Wang, Andrew C BaisdenAbstract:Common-mode (CM) choke saturation is a practical problem in CM filter applications. It is generally believed that the leakage inductance of CM chokes makes the core saturated. This paper analyzes two new mechanisms for CM choke saturation due to CM voltage, and these mechanisms are verified in experiment. CM choke saturation is particularly important for motor drive systems, which have a high CM voltage and comparably higher stray grounding capacitance. A model is established to describe the relationship between the CM voltage and the volume of the CM magnetic components. According to the analysis, Line Impedance stabilization networks (LISNs) play an important role in the design of CM magnetic components.
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wavelet transform as an alternative to the short time fourier transform for the study of conducted noise in power electronics
IEEE Transactions on Industrial Electronics, 2008Co-Authors: L Coppola, Dushan Boroyevich, Qian Liu, S Buso, A BellAbstract:This paper compares the characteristics of the classic and short time Fourier transform with the continuous wavelet transform. The wavelet transform perfectly suits the considered application, the study of the time evolution of frequency spectra in switched mode power supplies, which operate with significant transients. The analysis made with wavelets offers a means to better understand the generation and propagation of conducted noise from the noise source, the switching devices, to the point where the noise is actually measured, the Line Impedance stabilization network.
Andrew C Baisden - One of the best experts on this subject based on the ideXlab platform.
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analysis of cm volt second influence on cm inductor saturation and design for input emi filters in three phase dc fed motor drive systems
IEEE Transactions on Power Electronics, 2010Co-Authors: Shuo Wang, Nicolas Gazel, Yong Kang, Dushan Boroyevich, Fei Wang, Andrew C BaisdenAbstract:Common-mode (CM) choke saturation is a practical problem in CM filter applications. It is generally believed that the leakage inductance of CM chokes makes the core saturated. This paper analyzes two new mechanisms for CM choke saturation due to CM voltage, and these mechanisms are verified in experiment. CM choke saturation is particularly important for motor drive systems, which have a high CM voltage and comparably higher stray grounding capacitance. A model is established to describe the relationship between the CM voltage and the volume of the CM magnetic components. According to the analysis, Line Impedance stabilization networks (LISNs) play an important role in the design of CM magnetic components.
Shuo Wang - One of the best experts on this subject based on the ideXlab platform.
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common mode voltage in dc fed motor drive system and its impact on the emi filter
Applied Power Electronics Conference, 2010Co-Authors: Shuo Wang, Nicolas Gazel, Fred Wang, Dushan Boroyevich, Yong KangAbstract:Common mode (CM) choke saturation is a practical problem in common-mode filter applications. It's generally believed that the leakage inductance of common-mode chokes makes the core saturated. This paper analyzes two new mechanisms for common-mode choke saturation due to common-mode voltage, and these mechanisms are verified in experiment. Common-mode choke saturation is particularly important for motor drive systems, which have a high common-mode voltage and comparably higher stray grounding capacitance. A model is established to describe the relationship between the common-mode voltage and the volume of the common-mode magnetic components. According to the analysis, LISNs (Line Impedance stabilization networks) play an important role in the design of CM magnetic components.
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analysis of cm volt second influence on cm inductor saturation and design for input emi filters in three phase dc fed motor drive systems
IEEE Transactions on Power Electronics, 2010Co-Authors: Shuo Wang, Nicolas Gazel, Yong Kang, Dushan Boroyevich, Fei Wang, Andrew C BaisdenAbstract:Common-mode (CM) choke saturation is a practical problem in CM filter applications. It is generally believed that the leakage inductance of CM chokes makes the core saturated. This paper analyzes two new mechanisms for CM choke saturation due to CM voltage, and these mechanisms are verified in experiment. CM choke saturation is particularly important for motor drive systems, which have a high CM voltage and comparably higher stray grounding capacitance. A model is established to describe the relationship between the CM voltage and the volume of the CM magnetic components. According to the analysis, Line Impedance stabilization networks (LISNs) play an important role in the design of CM magnetic components.
Luiz A C Lopes - One of the best experts on this subject based on the ideXlab platform.
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power sharing control strategies for a three phase microgrid in different operating condition with droop control and damping factor investigation
Iet Renewable Power Generation, 2015Co-Authors: Wanderson Ferreira De Souza, Marcos Antonio Severomendes, Luiz A C LopesAbstract:In this study, a microgrid with two voltage source inverters (VSIs), operating in islanded or grid-connected mode is analysed. The active power control by droop coefficients and reference frequencies is demonstrated. In addition, the inductive and resistive droop strategies are compared by considering the complex Line Impedance. By measuring the Line Impedance in the prototype, it was found that, even for the low-voltage microgrid, the Line Impedance was not predominantly resistive, but complex. For this Line Impedance condition, an investigation to determine the best droop control law considering the partial derivatives. Observing the partial derivatives and the experimental results obtained it is demonstrated that inductive droop control is better to control the active power for complex Line Impedance. For a scenario with resistive unbalanced loads and different power sharing between the inverters, the proposed control, implemented in the a–b–c reference frame, was validated. A novel absolute damping factor is developed to improve the transient response and reduce the reactive power flow. The VSIs are connected to the grid without transformers to reduce the connection costs. Simulation and experimental results are presented to confirm the improvements achieved using the implemented control method.