The discrete model of the power stage of the voltage source inverter for UPS

Rymarski, Zbigniew

doi:10.1080/00207217.2011.589736

Cited by 28 publications

(52 citation statements)

References 13 publications

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“…The distortions of the output voltage depend on the design of the output filter. The output filter design was presented in (Rymarski 2009(Rymarski , 2010(Rymarski , 2011a and was based on the approach of Dahono et al 1995. The reduction of the highest amplitude of harmonics (close to f c frequency) below 3%, and THD below 5% (IEEE-519) was the assumption of the output filter L F C F product value calculation.…”

Section: Vsi Output Voltage For the Open Feedback Loopmentioning

confidence: 99%

“…Considering the output voltage harmonics of the PWM inverter it can be easily proved that the harmonic with the highest amplitude before filtering has the frequency f c (f c -frequency of the modulated waveform) or f c ±f m (f m -fundamental frequency of the modulating sinusoidal signal) where f c >50f m is usual in UPS systems. The design of the output filter is based on the requirement to sufficiently suppress them (Rymarski 2009(Rymarski , 2010(Rymarski , 2011a and to minimize the reactive power in the output filter components. The IEEE-519 standard does not specify the limit of the highest order of the harmonics spectrum considered.…”

Section: Introductionmentioning

confidence: 99%

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Control Systems of Single-Phase Voltage Source Inverters for a UPS

Rymarski

2012

IFAC Proceedings Volumes

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Section: Vsi Output Voltage For the Open Feedback Loopmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control Systems of Single-Phase Voltage Source Inverters for a UPS

Rymarski

2012

IFAC Proceedings Volumes

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“…Power inverters are generally categorised into two main types: Voltage-source inverter (VSI) and current source inverter (CSI) (He, Sheng, Finney, Qian, & Williams, 2000;Rymarski, 2011). The output voltage always remains within the input DC voltage in the case of traditional VSI.…”

Section: Introductionmentioning

confidence: 99%

“…It is easy to design the ZSI with superlative modulation ratio fixed to the modern insignificant case. With suitable modification in the inverter shoot during time interval, any drag in energy demand is subsequently administered, which, in essence, shapes into a third state devised for enhancing voltage development in ZSI (Rymarski, 2011).…”

Section: Introductionmentioning

confidence: 99%

An enhanced Z-source inverter topology-based permanent magnet brushless DC motor drive speed control

Peter¹,

Rajaram

2014

International Journal of Electronics

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In this paper, an enhanced Z-source inverter (ZSI) is introduced for controlling the speed of permanent magnet brushless DC motor (PMBLDCM) drive. It is the extension of the conventional ZSI and the elements used in the circuit are the same as those of the conventional ZSI, except that the position of Inverter Bridge and diode would be exchanged from the classical circuit diagram. This exchanged circuit avoids the startup path of the inrush current and hence reduces the inrush current and improves the motor efficiency. Different modes of enhanced ZSI are studied with PMBLDCM. The voltage polarity of Z-source capacitors in the proposed circuit is the same as that of the input voltage polarity. Furthermore, to get the same voltage boost, the capacitor voltage stress is reduced to a significant extent. The speed control capability of the proposed brushless DC motor drive is compared with that of the conventional ZSI. The proposed ZSI is implemented in MATLAB/Simulink working platform and the output performance is evaluated. Also, the performance of voltage ratio is analysed both by simulation and mathematical models. All these analyses are known to express the innovative features of the proposed system.

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“…The voltage polarity of Z source capacitors in the enhanced ZSI what's left the same as the input voltage polarity; hence, the capacitor voltage polarity might be decreased to a respectable level to get the same boost voltage. The improved Z-source topology has inborn inrush-current confinement capability contrasted with the conventional ZSI, in light of the fact that there is no current path at startup [5].…”

Section: Capacitor Voltage Stress In Z-sourcementioning

confidence: 99%

Induced over voltage test on transformers using enhanced Z-source inverter based circuit

Peter¹,

Sherine²

2017

Journal of Electrical Engineering

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The normal life of a transformer is well above 25 years. The economical operation of the distribution system has its roots in the equipments being used. The economy being such, that it is financially advantageous to replace transformers with more than 15 years of service in the second perennial market. Testing of transformer is required, as its an indication of the extent to which a transformer can comply with the customers specified requirements and the respective standards (IEC 60076-3). In this paper, induced over voltage testing on transformers using enhanced Z source inverter is discussed. Power electronic circuits are now essential for a whole array of industrial electronic products. The bulky motor generator set, which is used to generate the required frequency to conduct the induced over voltage testing of transformers is nowadays replaced by static frequency converter. First conventional Z-source inverter, and second an enhanced Z source inverter is being used to generate the required voltage and frequency to test the transformer for induced over voltage test, and its characteristics is analysed.

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The discrete model of the power stage of the voltage source inverter for UPS

Cited by 28 publications

References 13 publications

Control Systems of Single-Phase Voltage Source Inverters for a UPS

Control Systems of Single-Phase Voltage Source Inverters for a UPS

An enhanced Z-source inverter topology-based permanent magnet brushless DC motor drive speed control

Induced over voltage test on transformers using enhanced Z-source inverter based circuit

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