Voltage phase controller for power systems

Sieńko, Tomasz; Szczepanik, Jerzy; Sobczyk, Tadeusz

doi:10.1109/epqu.2007.4424248

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…The idea of control of the MC structure is based on very simple principles [6][7][8]. Output voltages are created from the fragments of input ones.…”

Section: Introductionmentioning

confidence: 99%

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Reactive Power Transfer via Matrix Converter Controlled by the “One Periodical” Algorithm

2020

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The article describes the application of a straight forward energy converter, a multiphase matrix converter (MC), as part of a device, connected parallel to the power grid, and able to supply variable reactive power flow to the power system. The research performed by authors included the development of control procedures for a multiphase MC, based on a new approach and power system (application) requirements. The multiphase MC structure (6 × 6, 12 × 12) was used since the proposed control procedure creates output as the combination of input voltages. The increased number of phases decreases the order of harmonics in the MC converter similarly as in multilevel converters. This manuscript concentrates on the mathematical analysis of MC work under the “one periodical” algorithm and links it introduces in the power system. The previously developed, spatial-temporal mathematical model of the MC was limited to the dominant (first) harmonic and applied between the grid and reactive load. The results obtained from the analysis of the model showed that, for the applied control procedure (one periodical algorithm), the output voltage is built only from positive or negative sequences of input voltage. Three cases were recognized where the sign input power factor depends on input voltage and control sequence as well as on the value of control frequency. The effects of the model simulation were compared to those obtained from the MATLAB simulation and from the real laboratory 30 kVA-rated model. The main factors analyzed during this research include the expected value and distortion of input current and sign of reactive input power.

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“…The idea of control of the MC structure is based on very simple principles [6][7][8]. Output voltages are created from the fragments of input ones.…”

Section: Introductionmentioning

confidence: 99%

“…The number of phases was chosen to be 6 or 12, since 3 × 6, 400 kV and 3 × 12 transformers are already in use (High Voltage Direct Current link, Poland-Sweden). The idea of control of the MC structure is based on very simple principles [6][7][8]. Output voltages are created from the fragments of input ones.…”

Section: Introductionmentioning

confidence: 99%

Reactive Power Transfer via Matrix Converter Controlled by the “One Periodical” Algorithm

2020

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“…They seem to be fulfilled with the one-periodic control strategy, initiated and developed at the Institute of Electromechanical Energy Conversion at Cracow University of Technology [3]. This control strategy has some important advantages such as: high dynamic and control precision, limited amount of harmonics in input and output signals, the low sampling frequency [4] What is more, the voltage transfer ratio can be increased up to 98.8% by using two coupling transformers converting 3 phase system into 12 [5]. Because of frequency analysis of that kind of units, description of the controller in frequency domain is desirable.…”

Section: Introductionmentioning

confidence: 99%

Influence of commutation conditions on steady states in matrix converter

Borkowski¹,

Sobczyk²

2011

Archives of Electrical Engineering

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Influence of commutation conditions on steady states in matrix converter The paper investigates a significant influence of transients on steady states in a matrix converter with the one-periodic control strategy. Proposed controller can be used as an interconnection device within a power system for a power flow control. However, the presence of inductances in external systems has the significant influence on steady state of a matrix converter operation. The special current injection method has been developed to ensure a proper operation of a matrix converter. Presented analysis of steady states is carried out in a frequency domain using the harmonic balance method. Obtained numerical results, which are confirmed by a time domain analysis, prove the effectiveness of the proposed method.

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“…In the paper the analysis in a frequency domain is presented on example of the scalar technique, called the "one-periodic control strategy" [8][9][10], which can be used to convert N-phase system into M-phase system with different frequency and phase then the input one. It has some important advantages such as: high dynamic and control precision, limited amount of harmonics in input and output signals, the low sampling frequency [7,11].…”

Section: Introductionmentioning

confidence: 99%

Description of matrix converter in frequency domain

Borkowski¹,

Sobczyk²

2013

Archives of Electrical Engineering

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Abstract:The paper presents abilities and advantages following from the use of the harmonic balance method for analysis of steady state of a multiphase system with switching devices on example of a matrix converter. Switching elements are modelled as resistances with step-wise variable parameters, what allows to describe the converter by a linear infinite set of equations. The analysis in frequency domain is presented on example of the one-periodic control strategy. External systems were also added using the Thevenin method approach. The numerical calculation results of a linear equations set were verified by the variable structure method in a time domain and the numerical convergence was confirmed. Furthermore, the exemplary complex system was analysed using the cascade method and current waveforms were obtained.

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Voltage phase controller for power systems

Cited by 7 publications

References 4 publications

Reactive Power Transfer via Matrix Converter Controlled by the “One Periodical” Algorithm

Reactive Power Transfer via Matrix Converter Controlled by the “One Periodical” Algorithm

Influence of commutation conditions on steady states in matrix converter

Description of matrix converter in frequency domain

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