Inverter Nonlinearity Compensation in the Presence of Current Measurement Errors and Switching Device Parameter Uncertainties

Choi, Chan-Hee; Cho, Kyung-Rae; Seok, Jul-Ki

doi:10.1109/tpel.2006.889999

Cited by 54 publications

(30 citation statements)

References 16 publications

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“…For non-ideal switching behaviors, e.g. dead time, turn on/off delay and voltage drop across switching devices, the negative effect can be mitigated by the advanced strategy (Zhao et al, 2004;Choi et al, 2007). On the other hand, for improving the accuracy of the proposed impedance estimation method in practical applications, there are two possible solutions.…”

Section: Nonideal Conditionsmentioning

confidence: 99%

New grid impedance estimation technique for grid-connected power converters

Guo

Sun

et al. 2014

J Engin Res

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Grid impedance estimation is crucial for operating and controlling of grid-connected converters, especially with the high penetration of renewable energy sources into microgrid and smart grid. One of the technical challenges is how to fast and accurately estimate the grid impedance, even under the distorted and unbalanced conditions. Many impedance estimation methods have been presented in the past decades. Most of them intentionally inject one or more disturbance signals, low frequency or high frequency, to excite the grid response. And then the grid impedance can be estimated by the voltage/current information of two steady-state operating points before and after the disturbance. However, these injected disturbances will deteriorate the power quality due to harmonics caused by the injected disturbances. In order to mitigate the problem, a new impedance estimation method is presented in this paper. Its basic idea lies in the inherent switching feature of the grid-connected power converter. The unique feature is that the proposed new grid impedance can be easily estimated, even under distorted and unbalanced grid voltage conditions with no need of the intentionally injected disturbance signals any more. First of all, the system equivalent impedance circuit is analyzed to clarify the proposed method, along with a theoretical comparison with the conventional one. Aside from that, an interesting estimation of voltage and current switching components are presented for determining the grid impedance with two well-defined equations. And then, the performance tests are carried out and the results verify the effectiveness of the proposed method. Finally, a typical application of the proposed method is presented and discussed.

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Section: Nonideal Conditionsmentioning

confidence: 99%

New grid impedance estimation technique for grid-connected power converters

Guo

Sun

et al. 2014

J Engin Res

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“…Since these undesirable ripples bring about bad influences to motor driving system, a compensation algorithm must be needed in the control algorithm of the motor drive. To solve the nonlinear characteristics of the VSI, various solutions have already been suggested [1][2][3][4][5][6][7][8][9][10][11][12][13]. The lost voltage average value calculation [2,3], the pulse width modulation(PWM) pulse based technique [6].…”

Section: Introductionmentioning

confidence: 99%

“…The lost voltage average value calculation [2,3], the pulse width modulation(PWM) pulse based technique [6]. voltage feed forward method [7][8][9][10][11][12], and the support vector regression(SVR) method [13] are the main categories of the conventional dead time compensation methods.…”

Section: Introductionmentioning

confidence: 99%

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Online Dead Time Effect Compensation Algorithm of PWM Inverter for Motor Drive Using PR Controller

Park¹,

Jung²

2017

Journal of Electrical Engineering and Technology

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-This paper proposes the dead time effect compensation algorithm using proportional resonant controller in pulse width modulation inverter of motor drive. To avoid a short circuit in the dc link, the dead time of the switch device is surely required. However, the dead time effect causes the phase current distortions, torque pulsations, and degradations of control performance. To solve these problems, the output current including ripple components on the synchronous reference frame and stationary reference frame are analyzed in detail. As a results, the distorted synchronous d-and q-axis currents contain the 6th, 12th, and the higher harmonic components due to the influence of dead time effect. In this paper, a new dead time effect compensation algorithm using proportional resonant controller is also proposed to reduce the output current harmonics due to the dead time and nonlinear characteristics of the switching devices. The proposed compensation algorithm does not require any additional hardware and the offline experimental measurements. The experimental results are presented to demonstrate the effectiveness of the proposed dead time effect compensation algorithm.

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“…The compensation methods of the dead time effects for the Y-connected 3-phase machine have already been suggested in many technical literatures [6]- [17]. The average value of the lost voltage calculation [6], [7], the PWM pulse based method [8], the voltage feed forward method [9]- [13], the phase angle calculation method [14], the disturbance observer method [15], [16], and the support vector regression (SVR) method [17] are the main categories of the conventional dead time compensation methods. However, these methods are based on the Y-connected three-phase machine and have drawbacks such as parameter dependency and complexity.…”

Section: Introductionmentioning

confidence: 99%

A Dead Time Compensation Algorithm of Independent Multi-Phase PMSM with Three-Dimensional Space Vector Control

Park¹,

Park²,

Bae³

et al. 2013

Journal of Power Electronics

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This paper proposes a new dead time compensation method of independent six-phase permanent magnet synchronous motors (IS-PMSM). The current of the independent phase machines contains odd-numbered harmonics because of the dead time and the nonlinear characteristics of the switching devices. By using the d-q-n three-dimensional vector analysis, these harmonics can be extracted at the n-axis current. Thus, the current distortion can be compensated by controlling the n-axis current of the IS-PMSM to zero. The proposed method is simple and can be easily implemented without additional hardware setup. The validity of the proposed compensation method is verified with simulations and several experiments.

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Inverter Nonlinearity Compensation in the Presence of Current Measurement Errors and Switching Device Parameter Uncertainties

Cited by 54 publications

References 16 publications

New grid impedance estimation technique for grid-connected power converters

New grid impedance estimation technique for grid-connected power converters

Online Dead Time Effect Compensation Algorithm of PWM Inverter for Motor Drive Using PR Controller

A Dead Time Compensation Algorithm of Independent Multi-Phase PMSM with Three-Dimensional Space Vector Control

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