Improving the Dynamics of Virtual-Flux-Based Control of Three-Phase Active Rectifiers

Norniella, Joaquín G.; Cano, José M.; Orcajo, Gonzalo A.; Rojas, C.H.; Pedrayes, Joaquín F.; Cabanas, M.F.; Melero, M.G.

doi:10.1109/tie.2013.2245614

Cited by 86 publications

(47 citation statements)

References 32 publications

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“…So the part within the dashed box can be seen as a virtual synchronous AC motor [2,10]. And then, the power grid voltage can be regarded as the differential quantity of the virtual flux-linkage of virtual AC electric machinery; the phase information of power grid can be obtained from the virtual flux orientation, so that the power grid voltage sensor can be omitted.…”

Section: Improved Virtual Flux-linkage Observermentioning

confidence: 99%

“…With the development of power electronics and control theory, in order to improve the control performance and reduce system cost and harmonics, numerous modern control strategies have been studied and applied in an attempt to the control system of three-phase PWM rectifier [9][10][11][12][13][14][15]. Hereinto, direct power control (DPC) strategy has become one of the hot research topics in recent years, because of its fast dynamic response, simple structure, and high power factor, and so on [8,11,12,14,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…As for the power grid voltage, it can be obtained from online identification [2,10,13,15]. If the power grid voltage 2 Journal of Control Science and Engineering sensor can be saved, the system performance would not be affected by too much; meanwhile the system structure can be more conducive to simplifying, the system costs can be reduced also.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer

2017

Journal of Control Science and Engineering

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In order to achieve the low cost and high performance control of three-phase PWM rectifier, a direct power control (DPC) strategy based on a new-style virtual flux-linkage observer is proposed. The model of three-phase PWM rectifier and the principle of virtual flux-linkage vector control are introduced firstly. Then, in order to avoid the effect of integral initial value and cumulative deviation, three first-order low-pass filters are cascaded to replace the pure integral link; an improved virtual flux-linkage observer of threephase power grid is presented. From the observed virtual flux-linkage, the voltage and instantaneous power of three-phase power grid are online estimated. On this basis, the power grid voltage sensorless direct power control system of three-phase PWM rectifier is designed. Simulation results have shown that, both in the rectifying state and in the inverting state, the power grid side current and the DC side voltage of three-phase PWM rectifier all can be effectively controlled; the high power factor operation of three-phase PWM rectifier is realized.

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Section: Improved Virtual Flux-linkage Observermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer

2017

Journal of Control Science and Engineering

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“…Using the voltage-oriented control approach and the Park transformation, traditional control methods have been designed to include a single Proportional-Integral (PI) controller for achieving the desired unity power factor and a cascaded PI controller for regulating the dc output voltage [7]- [10]. The inner loop is often replaced with hysteresis controllers, especially in virtual-flux-based control methods [11], [12], while intelligent control methods have been also proposed to improve the rectifier's performance [13], [14]. Recently, direct power control has been applied to three-phase rectifiers which is based on a predefined look-up table, but apart from its simple structure, it often produces high power ripples and introduces a variable switching frequency [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Current-Limiting Three-Phase Rectifiers

Zhong

Konstantopoulos

2018

IEEE Trans. Ind. Electron.

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Abstract-In this paper, a nonlinear controller is proposed for a three-phase rectifier so that its input current does not exceed a given limit. At the same time, the proposed controller can achieve accurate dc output voltage regulation and reactive power control independently from system parameters including the load during the normal operation. Using the generic dq transformation and the nonlinear model of the rectifier, the boundedness and the current-limiting property of the closed-loop system are proven using Lyapunov methods and the input-to-state stability theory. Moreover, an analytic framework for selecting the controller parameters is presented and the current limitation is proven for both the cases with L and LCL filters at the input of the rectifier. Different from existing approaches, the current-limiting property is achieved without external limiters, monitoring devices or switches and is incorporated in the control dynamics, independently from the type of the load (linear or nonlinear). Extensive real-time simulation results are provided to verify the effectiveness of the proposed strategy.

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“…Lower values of the cut-off frequency reduce the dynamics as well as the error in the estimated angular position of the rotor, while its higher values have the opposite effects. Based on that notion, cascaded LPFs presented in [9,10] pass the waveforms of the input voltage through the filter whose cut-off frequency satisfies the required dynamics at the operating speed, while the phase shift is being compensated based on the time constant of the selected filter and the instantaneous value of the speed. Computationally more efficient solutions in the form of programmable LPFs with variable cut-off frequencies are presented in [11][12][13][14], where the dynamics can be improved by selecting a suitable ratio of the cut-off frequencies and the instantaneous speed.…”

Section: Introductionmentioning

confidence: 99%

The Flux-Based Sensorless Field-Oriented Control of Permanent Magnet Synchronous Motors without Integrational Drift

2018

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Abstract:The magnitude of the rotor magnetic flux linkage and its spatial orientation within a permanent magnet synchronous motor directly define the angular position of the rotor and are thus used in many sensorless applications as the governing variables. The rotor magnetic flux linkage in the stator reference frame is represented by two orthogonal sinusoids whose amplitudes and phases are determined by the integration of the orthogonal components of the corresponding voltage, which, due to DC offsets and initial conditions at transient states, result in an integrational drift. This paper proposes a solution to the problem of such integrational drift in the form of a compensation based only on orthogonal properties of waveforms in the stator reference frame. That makes it completely independent of electrical parameters of the motor. As a result, the proposed compensation of the integrational drift does not require any optimization by the user and it is functional from a standstill. The effectiveness of the proposed compensation is demonstrated analytically, by a simulation, and an experiment on a real motor by a simple observer for the sensorless field-oriented control based on the voltage model in the stator reference frame.

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Improving the Dynamics of Virtual-Flux-Based Control of Three-Phase Active Rectifiers

Cited by 86 publications

References 32 publications

Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer

Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer

Current-Limiting Three-Phase Rectifiers

The Flux-Based Sensorless Field-Oriented Control of Permanent Magnet Synchronous Motors without Integrational Drift

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