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Ming Yang - One of the best experts on this subject based on the ideXlab platform.

  • suppressing Ferroresonance in potential transformers using a model free active resistance controller
    International Journal of Electrical Power & Energy Systems, 2018
    Co-Authors: Ming Yang, Wenxia Sima, Lijun Chen, Pan Duan, Potao Sun, Tao Yuan
    Abstract:

    Abstract Ferroresonance, excited by saturated electromagnetic voltage transformers, can severely damage power systems because it produces long duration large overvoltages. In this paper, a method is developed to eliminate potential transformer (PT) Ferroresonance through a model-free method. First, a structural diagram of the Ferroresonance eliminating device is established based on a practical ferroresonant circuit. The effect of the adjustable parameters of the device is investigated, including resistance, pulse frequency, and pulse duty cycle. Then, Iterative control strategies are developed to adjust the gate signal duty cycle of the controller for limiting the Ferroresonance to a normal status and then switching off the elimination device. Finally, simulations are conducted demonstrating that the method proposed was effective.

  • Non-linear characteristic quantity extraction of Ferroresonance overvoltage time series
    IET Generation Transmission & Distribution, 2017
    Co-Authors: Ming Yang, Wenxia Sima, Qing Yang, Mi Zou, Qichang Duan
    Abstract:

    Ferroresonance is a common and complex phenomenon in power systems. Some types of Ferroresonances are remarkably difficult to distinguish from others. This study adopts non-linear analysis methods to directly extract non-linear characteristic quantities from Ferroresonance overvoltage time series (FOTS). Simulated and practical FOTS are investigated to validate the proposed method. Non-linear characteristic quantities, i.e. average grey value of reconstructed attractor and improved largest Lyapunov exponent of Ferroresonance overvoltage, are extracted based on phase space reconstruction of voltage time series to identify different types of Ferroresonance. Practical FOTS acquired from a transformer substation is used to validate the proposed method. Non-linear characteristic quantities obtained in this study can be applied to identify different types of Ferroresonance. These characteristics allow further understanding of the non-linear Ferroresonance phenomenon from another point of view and benefit the study of Ferroresonance identification and suppression.

  • Ferroresonance overvoltage features extraction using nonlinear analytical technique
    2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2016
    Co-Authors: Sun Tingxi, Ming Yang, Jia Tan, Ma Dan, Yizhi Fang, Sima Wenxia, Daixiao Peng
    Abstract:

    Ferroresonance is complicated phenomenon for its various modes. In this paper, two nonlinear features are extracted based on nonlinear analytical Technique. The features can be used to analyze the motion characteristics of the Ferroresonance system of the overvoltage time series. The study on overvoltage acquired from a power substation shows that the feature is very useful for Ferroresonance mode identification, especially for the quasi-periodical Ferroresonance and chaotic Ferroresonance.

  • Simulation and experiment on a flexible control method for Ferroresonance
    IET Generation Transmission & Distribution, 2014
    Co-Authors: Wenxia Sima, Ming Yang, Qing Yang, Tao Yuan, Mi Zou
    Abstract:

    This study investigates the physical mechanism of Ferroresonance and its control. Based on this mechanism, a flexible control method for Ferroresonance is proposed, and its control mechanism is discussed. High-frequency controllable switches are used in the control module proposed in this study, and several parameters of the control module can be adjusted according to Ferroresonance types identified by the comprehensive identification system and saturation degrees of the Ferroresonance. The control module is then switched into the secondary circuit of the potential transformer, and Ferroresonance can be controlled. Simulation and experimentation show that Ferroresonance of various types and saturation degrees can be restrained.

  • Experiment on a novel method for fundamental Ferroresonance suppression
    Modern Physics Letters B, 2014
    Co-Authors: Wenxia Sima, Ming Yang, Qing Yang, Tao Yuan, Mi Zou
    Abstract:

    A novel method for fundamental Ferroresonance suppression is proposed in this paper. The suppression mechanism is analyzed based on the harmonic balance method and a novel method for fundamental Ferroresonance suppression is proposed. Experiments show that the fundamental Ferroresonance with different saturation degrees can be suppressed by a single damping resistor controlled by the high frequency controllable switches located in the suppression module.

Tao Yuan - One of the best experts on this subject based on the ideXlab platform.

  • suppressing Ferroresonance in potential transformers using a model free active resistance controller
    International Journal of Electrical Power & Energy Systems, 2018
    Co-Authors: Ming Yang, Wenxia Sima, Lijun Chen, Pan Duan, Potao Sun, Tao Yuan
    Abstract:

    Abstract Ferroresonance, excited by saturated electromagnetic voltage transformers, can severely damage power systems because it produces long duration large overvoltages. In this paper, a method is developed to eliminate potential transformer (PT) Ferroresonance through a model-free method. First, a structural diagram of the Ferroresonance eliminating device is established based on a practical ferroresonant circuit. The effect of the adjustable parameters of the device is investigated, including resistance, pulse frequency, and pulse duty cycle. Then, Iterative control strategies are developed to adjust the gate signal duty cycle of the controller for limiting the Ferroresonance to a normal status and then switching off the elimination device. Finally, simulations are conducted demonstrating that the method proposed was effective.

  • Simulation and experiment on a flexible control method for Ferroresonance
    IET Generation Transmission & Distribution, 2014
    Co-Authors: Wenxia Sima, Ming Yang, Qing Yang, Tao Yuan, Mi Zou
    Abstract:

    This study investigates the physical mechanism of Ferroresonance and its control. Based on this mechanism, a flexible control method for Ferroresonance is proposed, and its control mechanism is discussed. High-frequency controllable switches are used in the control module proposed in this study, and several parameters of the control module can be adjusted according to Ferroresonance types identified by the comprehensive identification system and saturation degrees of the Ferroresonance. The control module is then switched into the secondary circuit of the potential transformer, and Ferroresonance can be controlled. Simulation and experimentation show that Ferroresonance of various types and saturation degrees can be restrained.

  • Experiment on a novel method for fundamental Ferroresonance suppression
    Modern Physics Letters B, 2014
    Co-Authors: Wenxia Sima, Ming Yang, Qing Yang, Tao Yuan, Mi Zou
    Abstract:

    A novel method for fundamental Ferroresonance suppression is proposed in this paper. The suppression mechanism is analyzed based on the harmonic balance method and a novel method for fundamental Ferroresonance suppression is proposed. Experiments show that the fundamental Ferroresonance with different saturation degrees can be suppressed by a single damping resistor controlled by the high frequency controllable switches located in the suppression module.

  • reconstruction and identification and control method of Ferroresonance overvoltage based on voltage time series
    International Journal of Modern Physics B, 2013
    Co-Authors: Ming Yang, Wenxia Sima, Qing Yang, Tao Yuan, Lijun Chen, Yanling Huang
    Abstract:

    Ferroresonance overvoltage and over-current can be restrained using nonlinear dynamics. However, the Ferroresonance simplified model, which cannot reflect the huge Ferroresonance circuit in the grid precisely and cannot satisfy real-time analysis, is adopted in the traditional nonlinear control method. Owing to these shortcomings, the strategy of controlling Ferroresonance overvoltage based on voltage time series is proposed. Based on the voltage time series analysis methods, the Ferroresonance system is identified using the best embedding dimension and the best time delay obtained from the phase space reconstruction. Afterward, the feedback controller is designed based on the platform of the identified model. Results show that fundamental, subharmonic and chaotic Ferroresonance overvoltage can all be controlled using the method presented in this paper even without the system parameters and the accurate system model. Therefore, the control strategy is generally more applicable.

S. Vadhva - One of the best experts on this subject based on the ideXlab platform.

  • review of Ferroresonance in power distribution grids
    Information Reuse and Integration, 2011
    Co-Authors: S. Hassan, M. Vaziri, S. Vadhva
    Abstract:

    Ferroresonance is a special case of resonance, which can occur when a non-linear inductive reactance is connected in series with a capacitive reactance. In instances of Ferroresonance involving electric power distribution facilities, the inductive reactance will be the magnetizing reactance of a single-phase or three-phase transformer. The capacitive reactance will be due ordinarily to the conductor-to-sheath capacitance of primary cable supplying the transformer under favorable conditions. Ferroresonance may be accompanied by abnormally high or low voltages as a result of single pole switching of one or two phases of the source supply to the transformer. Ferroresonance is capable of producing sustained overvoltages with peak magnitudes approaching, or exceeding twice the rated peak voltage, which is harmful and unsafe for the operation of most equipment. In this paper, the various conditions giving rise to occurrence of Ferroresonance will be identified. The most prevalent resonance resulting in undesirable voltage conditions will be addressed and analyzed. Also some possible means of preventing occurrence of unsafe Ferroresonance in power transformers will be proposed.

  • IRI - Review of Ferroresonance in power distribution grids
    2011 IEEE International Conference on Information Reuse & Integration, 2011
    Co-Authors: S. Hassan, M. Vaziri, S. Vadhva
    Abstract:

    Ferroresonance is a special case of resonance, which can occur when a non-linear inductive reactance is connected in series with a capacitive reactance. In instances of Ferroresonance involving electric power distribution facilities, the inductive reactance will be the magnetizing reactance of a single-phase or three-phase transformer. The capacitive reactance will be due ordinarily to the conductor-to-sheath capacitance of primary cable supplying the transformer under favorable conditions. Ferroresonance may be accompanied by abnormally high or low voltages as a result of single pole switching of one or two phases of the source supply to the transformer. Ferroresonance is capable of producing sustained overvoltages with peak magnitudes approaching, or exceeding twice the rated peak voltage, which is harmful and unsafe for the operation of most equipment. In this paper, the various conditions giving rise to occurrence of Ferroresonance will be identified. The most prevalent resonance resulting in undesirable voltage conditions will be addressed and analyzed. Also some possible means of preventing occurrence of unsafe Ferroresonance in power transformers will be proposed.

  • Review of Ferroresonance in Power Distribution
    2011
    Co-Authors: S. Hassan, M. Vaziri, S. Vadhva
    Abstract:

    Ferroresonance is a special case of resonance, which can occur when a non-linear inductive reactance is connected in series with a capacitive reactance. In instances of Ferroresonance involving electric power distribution facilities, the inductive reactance will be the magnetizing reactance of a single- phase or three-phase transformer. The capacitive reactance will be due ordinarily to the conductor-to-sheath capacitance of primary cable supplying the transformer under favorable conditions. Ferroresonance may be accompanied by abnormally high or low voltages as a result of single pole switching of one or two phases of the source supply to the transformer. Ferroresonance is capable of producing sustained overvoltages with peak magnitudes approaching, or exceeding twice the rated peak voltage, which is harmful and unsafe for the operation of most equipment. In this paper, the various conditions giving rise to occurrence of Ferroresonance will be identified. The most prevalent resonance resulting in undesirable voltage conditions will be addressed and analyzed. Also some possible means of preventing occurrence of unsafe Ferroresonance in power transformers will be proposed.

Wenxia Sima - One of the best experts on this subject based on the ideXlab platform.

  • suppressing Ferroresonance in potential transformers using a model free active resistance controller
    International Journal of Electrical Power & Energy Systems, 2018
    Co-Authors: Ming Yang, Wenxia Sima, Lijun Chen, Pan Duan, Potao Sun, Tao Yuan
    Abstract:

    Abstract Ferroresonance, excited by saturated electromagnetic voltage transformers, can severely damage power systems because it produces long duration large overvoltages. In this paper, a method is developed to eliminate potential transformer (PT) Ferroresonance through a model-free method. First, a structural diagram of the Ferroresonance eliminating device is established based on a practical ferroresonant circuit. The effect of the adjustable parameters of the device is investigated, including resistance, pulse frequency, and pulse duty cycle. Then, Iterative control strategies are developed to adjust the gate signal duty cycle of the controller for limiting the Ferroresonance to a normal status and then switching off the elimination device. Finally, simulations are conducted demonstrating that the method proposed was effective.

  • Non-linear characteristic quantity extraction of Ferroresonance overvoltage time series
    IET Generation Transmission & Distribution, 2017
    Co-Authors: Ming Yang, Wenxia Sima, Qing Yang, Mi Zou, Qichang Duan
    Abstract:

    Ferroresonance is a common and complex phenomenon in power systems. Some types of Ferroresonances are remarkably difficult to distinguish from others. This study adopts non-linear analysis methods to directly extract non-linear characteristic quantities from Ferroresonance overvoltage time series (FOTS). Simulated and practical FOTS are investigated to validate the proposed method. Non-linear characteristic quantities, i.e. average grey value of reconstructed attractor and improved largest Lyapunov exponent of Ferroresonance overvoltage, are extracted based on phase space reconstruction of voltage time series to identify different types of Ferroresonance. Practical FOTS acquired from a transformer substation is used to validate the proposed method. Non-linear characteristic quantities obtained in this study can be applied to identify different types of Ferroresonance. These characteristics allow further understanding of the non-linear Ferroresonance phenomenon from another point of view and benefit the study of Ferroresonance identification and suppression.

  • Simulation and experiment on a flexible control method for Ferroresonance
    IET Generation Transmission & Distribution, 2014
    Co-Authors: Wenxia Sima, Ming Yang, Qing Yang, Tao Yuan, Mi Zou
    Abstract:

    This study investigates the physical mechanism of Ferroresonance and its control. Based on this mechanism, a flexible control method for Ferroresonance is proposed, and its control mechanism is discussed. High-frequency controllable switches are used in the control module proposed in this study, and several parameters of the control module can be adjusted according to Ferroresonance types identified by the comprehensive identification system and saturation degrees of the Ferroresonance. The control module is then switched into the secondary circuit of the potential transformer, and Ferroresonance can be controlled. Simulation and experimentation show that Ferroresonance of various types and saturation degrees can be restrained.

  • Experiment on a novel method for fundamental Ferroresonance suppression
    Modern Physics Letters B, 2014
    Co-Authors: Wenxia Sima, Ming Yang, Qing Yang, Tao Yuan, Mi Zou
    Abstract:

    A novel method for fundamental Ferroresonance suppression is proposed in this paper. The suppression mechanism is analyzed based on the harmonic balance method and a novel method for fundamental Ferroresonance suppression is proposed. Experiments show that the fundamental Ferroresonance with different saturation degrees can be suppressed by a single damping resistor controlled by the high frequency controllable switches located in the suppression module.

  • reconstruction and identification and control method of Ferroresonance overvoltage based on voltage time series
    International Journal of Modern Physics B, 2013
    Co-Authors: Ming Yang, Wenxia Sima, Qing Yang, Tao Yuan, Lijun Chen, Yanling Huang
    Abstract:

    Ferroresonance overvoltage and over-current can be restrained using nonlinear dynamics. However, the Ferroresonance simplified model, which cannot reflect the huge Ferroresonance circuit in the grid precisely and cannot satisfy real-time analysis, is adopted in the traditional nonlinear control method. Owing to these shortcomings, the strategy of controlling Ferroresonance overvoltage based on voltage time series is proposed. Based on the voltage time series analysis methods, the Ferroresonance system is identified using the best embedding dimension and the best time delay obtained from the phase space reconstruction. Afterward, the feedback controller is designed based on the platform of the identified model. Results show that fundamental, subharmonic and chaotic Ferroresonance overvoltage can all be controlled using the method presented in this paper even without the system parameters and the accurate system model. Therefore, the control strategy is generally more applicable.

Lijun Chen - One of the best experts on this subject based on the ideXlab platform.

  • suppressing Ferroresonance in potential transformers using a model free active resistance controller
    International Journal of Electrical Power & Energy Systems, 2018
    Co-Authors: Ming Yang, Wenxia Sima, Lijun Chen, Pan Duan, Potao Sun, Tao Yuan
    Abstract:

    Abstract Ferroresonance, excited by saturated electromagnetic voltage transformers, can severely damage power systems because it produces long duration large overvoltages. In this paper, a method is developed to eliminate potential transformer (PT) Ferroresonance through a model-free method. First, a structural diagram of the Ferroresonance eliminating device is established based on a practical ferroresonant circuit. The effect of the adjustable parameters of the device is investigated, including resistance, pulse frequency, and pulse duty cycle. Then, Iterative control strategies are developed to adjust the gate signal duty cycle of the controller for limiting the Ferroresonance to a normal status and then switching off the elimination device. Finally, simulations are conducted demonstrating that the method proposed was effective.

  • reconstruction and identification and control method of Ferroresonance overvoltage based on voltage time series
    International Journal of Modern Physics B, 2013
    Co-Authors: Ming Yang, Wenxia Sima, Qing Yang, Tao Yuan, Lijun Chen, Yanling Huang
    Abstract:

    Ferroresonance overvoltage and over-current can be restrained using nonlinear dynamics. However, the Ferroresonance simplified model, which cannot reflect the huge Ferroresonance circuit in the grid precisely and cannot satisfy real-time analysis, is adopted in the traditional nonlinear control method. Owing to these shortcomings, the strategy of controlling Ferroresonance overvoltage based on voltage time series is proposed. Based on the voltage time series analysis methods, the Ferroresonance system is identified using the best embedding dimension and the best time delay obtained from the phase space reconstruction. Afterward, the feedback controller is designed based on the platform of the identified model. Results show that fundamental, subharmonic and chaotic Ferroresonance overvoltage can all be controlled using the method presented in this paper even without the system parameters and the accurate system model. Therefore, the control strategy is generally more applicable.