Efficiency improvement due to direct torque and flux three levels three areas control method applied to small hydroelectric power plant

Kulikowski, K.; Sikorski, Andrzej

doi:10.2478/v10175-011-0070-6

Cited by 3 publications

(5 citation statements)

References 9 publications

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“…5a), but in order to take full advantage of the three-level inverter each of the sectors is divided into four equilateral triangles (Fig. 9a) [13]. This division allows to choose a triangle in which the U * s stator voltage vector is currently located.…”

Section: Dtfc-3l-3am Methodmentioning

confidence: 99%

“…These variables are defined by Eqs. (8) and (9) [13]. If the projection of the U * s stator voltage vector on the U sec1 vector is shorter than half of vector's U sec1 length, then the U * s vector is located inside triangle 0.…”

Section: Dtfc-3l-3am Methodmentioning

confidence: 99%

“…The vector S t is dependent on the triangle where the U * s stator voltage vector is currently located. The vector is described by formula (13).…”

Section: Dtfc-3l-3am Methodmentioning

confidence: 99%

See 2 more Smart Citations

Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter

Sikorski

Kulikowski

Korzeniewski

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. This paper describes two modern direct torque and flux control methods of an induction machine supplied by a three-level inverter. Additionally, it presents a comparison of the methods both in static and dynamic states. The methods, in a specific way, make use of an increased number of active vectors of the three-level inverter in order to improve control quality and reduce switching frequency. The two methods modify the DTC method by using its advantages and eliminating, at the same time its drawbacks.In static states the comparison was based on the results of investigations performed for two different load values and three set values of angular speed, whereas in dynamic states the comparison was focused on the behavior of the machine at startup.The results of the investigations have shown that both methods give very good performance. They are characterized by both sinusoidal shape of flux and low current deformations even at low angular speeds i.e. less than 10% of the nominal value. The presented methods also allow to generate nominal flux for set zero angular speed in order to achieve excitation of the induction machine. The switching frequencies for both methods are very similar in almost the whole range of control but the methods have shown some differences in control quality, particularly for higher torque values.

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Section: Dtfc-3l-3am Methodmentioning

confidence: 99%

Section: Dtfc-3l-3am Methodmentioning

confidence: 99%

See 1 more Smart Citation

Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter

Sikorski

Kulikowski

Korzeniewski

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…This can be done using the three-level NPC inverter fed induction motor drive with direct torque control. This control ensures fast dynamic response even at low frequencies [3]. The NPC inverter is one of the most commonly used multilevel inverter topology for driving induction motor at high power applications.…”

Section: Improved Dtc Using Three-level Inverter Topology For Windmentioning

confidence: 99%

Improved DTC using three-level inverter topology for wind power applications

Chacko¹,

Beevi²

2013

2013 Annual IEEE India Conference (INDICON)

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Abstract-A DTC technique using NPC three level inverter fed induction motor is presented in this paper. In order to utilize the weak wind irrespective of the required constant angular velocity, a modified DTC with NPC topology can be used. Compared to the conventional DTC, this three level inverter DTC topology provides better dynamic performance with reduced torque ripple. Results obtained by using a versatile simulation package, SIMULINK/MATLAB, for demonstrating the NPC three level Inverter fed Induction motor with Direct Torque Control proves the effectiveness of the proposed topology.

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“…For a specified value of the torque ripple, the weight and overall dimension of LC filter can be reduced if 3-level inverter is used instead of 2-level [7]. Neutral Point Clamped (NPC) 3-level voltage source inverter is a widely used topology of multilevel inverters [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A state-space approach for control of NPC type 3-level sine wave inverter used in FOC PMSM drive

Tarczewski¹,

Grzesiak²,

Wawrzak³

et al. 2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. This paper presents the design and analysis process of state feedback controllers for NPC type 3-level sine wave inverter. In order to achieve good dynamic features in a state feedback control an internal model of reference input and a feedforward path are introduced. During synthesis process of the state feedback controllers maximum permissible dynamics of voltage control in the linear range of modulation is taken into account. It is shown that initially gains of the controller and feedforward path are non-stationary and depend on the angular velocity. Stationary approximation of a non-stationary state feedback controller is presented in details. Proposed state feedback control structures for continuous voltage shaping NPC type 3-level voltage source inverter are examined in FOC PMSM drive. The novelty of the presented controller lays in a stationary approximated state feedback control structure designed in terms of maximum permissible dynamics of a voltage control system. Simulation and experimental results (at the level of 3 kW) of the designed control algorithms are included.

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Efficiency improvement due to direct torque and flux three levels three areas control method applied to small hydroelectric power plant

Cited by 3 publications

References 9 publications

Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter

Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter

Improved DTC using three-level inverter topology for wind power applications

A state-space approach for control of NPC type 3-level sine wave inverter used in FOC PMSM drive

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