Determination of Instantaneous Currents and Voltages by Means of Alpha, Beta, and Zero Components

Duesterhoeft, W. C.; Schulz, M. W.; Clarke, Edith

doi:10.1109/t-aiee.1951.5060554

Cited by 234 publications

(111 citation statements)

References 2 publications

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“…The possible space vectors can be found by taking the Clarke transform of the line-to-neutral voltage of a six-step 3-phase bridge [19]. The voltage setpoint in the dq frame can be referred to the stationary reference frame through the inverse Park transform, rendering a complex space vector voltage setpoint, V * [20].…”

Section: B Space Vector Pulse-width Modulationmentioning

confidence: 99%

Simulation of Electromechanical Interactions of Permanent-Magnet Direct-Drive Wind Turbines Using the FAST Aeroelastic Simulator

Ochs

Miller

White

2014

IEEE Trans. Sustain. Energy

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Section: B Space Vector Pulse-width Modulationmentioning

confidence: 99%

Simulation of Electromechanical Interactions of Permanent-Magnet Direct-Drive Wind Turbines Using the FAST Aeroelastic Simulator

Ochs

Miller

White

2014

IEEE Trans. Sustain. Energy

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“…abc to α, β, 0 Using Clarke power invariant transformation [26] (1) αβ0 values in time domain for the phase voltages and currents are obtained. In the case the neutral current is measured, zerosequence current is directly obtained from the sensor reading.…”

Section: Digital Signal Processing Implementationmentioning

confidence: 99%

Implementation of a Hybrid Distributed/Centralized Real-Time Monitoring System for a DC/AC Microgrid With Energy Storage Capabilities

Garcı́a

Arboleya

Belaid

et al. 2016

IEEE Trans. Ind. Inf.

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Abstract-This paper proposes a combined distributed/centralized architecture for the control and monitoring of a hybrid DC/AC microgrid with energy storage capabilities. The monitoring system is based on an own developed C++ framework for the measurement and real-time state estimation of the microgrid. Calculations running at sampled values (SV) frequency (10kHz) are implemented into a set of distributed measurement and processing units which have a TCP/IP communication link with a central server running the powerflow (PF) algorithm. The architecture is fully scalable, with the only restrictions of the signal processing capabilities of the distributed units, LAN bandwidth and central server calculation capabilities. The proposed system includes the hardware and software architecture for the monitoring of the microgrid, the communications scheme, the implementation of real-time algorithms for grid state estimation, a graphical user interface including different visualization alternatives and data storing/retrieving capabilities.

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“…n-phase inverter produces m=2 (4) In order to avoid calculation in case of large number of vectors used in drive, the n-phase modulator is proposed Its operation will involve converting a vector quantities from the n-phase coordinates to orthogonal coordinates and vice versa. In the literature [2,8] drive systems with multi-hysteresis current regulator are described (Fig. 2) Usually, the control system applies the speed control loop The speed controller generates a reference value component i qref of the current vector.…”

Section: Fig 1 Division Of Basic Vector Control Strategies Used In mentioning

confidence: 99%

“…Control strategies like: rotor-oriented control (ROC) or field-oriented control (FOC) have been realized, basing on coordinate transformations. For 3-phase systems, the space vector written for stationary systems phase X ABC is transformed into orthogonal X αβ through the Clarke transformation [8]. As the paper addresses n-phase systems built from a number of phases n > 3, one should define the transformation of the n-phase to orthogonal transformation, which is a general-M. Janaszek…”

Section: Introductionmentioning

confidence: 99%

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Structures of vector control of n-phase motor drives based on generalized Clarke transformation

Janaszek

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The paper presents vector control structures for n-phase AC motors derived from generalized Clarke transformation. In contrast to known works, where authors operate on generalized formulas of the Clarke transformation, in this work, only a number of actually used phases, of mostly industrial purposes, are considered (n = 5, 6, 2£3). This allows to perform control calculations in stationary orthogonal coordinates aβ or rotating dq. There are implementations of different control strategies: ROC (rotor-oriented control) or FOC (field-oriented control). Next, the paper presents the novel concept of a voltage modulator designed for multi-phase drive systems. Operation of the modulator is based on the extended Clarke transformation for multiphase systems. A mathematical model of the multiphase voltage modulator, operating in open-loop and closed-loop current control has been presented. Some selected oscillograms of voltage and current waveform, which illustrate properties of proposed control structures have been presented. Why multiphase drive systems?In the last years, more and more often there appear works devoted to multiphase drives. Most of them refer to drives with induction motors, but published there are also descriptions of drives with permanent, magnet-synchronous motors. Many works refer to drives with 5-phase, but also with 6-phase motors, and dual 3-phase motors. A work on drives with multiphase motors justifies the advantages of such motors, compared to 3-phase motors:• With the same nominal values of power and supply voltage, the nominal values of phase currents for an n-phase motor are reduced, as compared to a 3-phase one.• In transistor power converters, components of a smaller permissible collector current can be applied. This problem is important in high-power drives used in traction, metallurgy, mining transport, high-power pump drives, fans, and compressors [11,12].• In n-phase systems, the angle between the phases of the motor is smaller. When using direct torque control method, it is possible to accurately determine the position of the rotor.• In n-phase motors, there is a decrease in the amplitude of fluctuations of the torque, and an increase in their frequency (for a specified angular velocity of the rotor) [13].• By increasing the number of phases, the drive offers a greater robustness. It is possible to work with a damaged single phase in the motor or branch in the inverter [14].

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Determination of Instantaneous Currents and Voltages by Means of Alpha, Beta, and Zero Components

Cited by 234 publications

References 2 publications

Simulation of Electromechanical Interactions of Permanent-Magnet Direct-Drive Wind Turbines Using the FAST Aeroelastic Simulator

Simulation of Electromechanical Interactions of Permanent-Magnet Direct-Drive Wind Turbines Using the FAST Aeroelastic Simulator

Implementation of a Hybrid Distributed/Centralized Real-Time Monitoring System for a DC/AC Microgrid With Energy Storage Capabilities

Structures of vector control of n-phase motor drives based on generalized Clarke transformation

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