A control method for voltage source inverter without dc link capacitor

Filho, M.E. de Oliveira; Gazoli, Jonas Rafael; Filho, Alfeu J. Sguarezi; Filho, Ernesto Ruppert

doi:10.1109/pesc.2008.4592660

Cited by 32 publications

(15 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This paper has proposed an improvement of the control method for VSI inverters with low DC-link capacitance proposed in [2,3]. With the proposed control scheme it is possible to obtain low-distortion input and output currents.…”

Section: Discussionmentioning

confidence: 99%

“…One major difficulty found in [2] is the steady state error at six times the input voltage frequency. There is a steady state error at the control of the output currents of the VSI, which cannot be cancelled by conventional compensators, since the magnitude of the space vector of the output currents oscillates at six times the oscillation frequency of the grid voltage.…”

Section: System Controlmentioning

confidence: 99%

“…3, where H i is the current sensors feedback gain and C(s), G inv (s) and G p (s) are, respectively, the transfer functions of the controller given by (2), of the inverter and of the plant.…”

Section: B Controller Discretizationmentioning

confidence: 99%

“…A current controller based on the magnitude of the load current space vector was presented in [2][3]. According to this strategy, the modulation index of the space vector modulation is dynamically regulated in order to get balanced output voltages.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Resonant (P+RES) controller applied to voltage source inverter with minimum DC link capacitor

Gazoli

Oliveira

Espindola

et al. 2011

XI Brazilian Power Electronics Conference

View full text Add to dashboard Cite

Voltage source inverters use large electrolytic capacitors in order to decouple the energy between the utility and the load, keeping the DC link voltage constant. Decreasing the capacitance reduces the distortion in the inverter input current but this also affects the load with low-order harmonics and generate disturbances at the input voltage. This paper applies the P+RES controller to solve the challenge of regulating the output current by means of controlling the magnitude of the current space vector, keeping it constant thus rejecting harmonic disturbances that would otherwise propagate to the load. This work presents a discussion of the switching and control strategy.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: System Controlmentioning

confidence: 99%

Section: B Controller Discretizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Resonant (P+RES) controller applied to voltage source inverter with minimum DC link capacitor

Gazoli

Oliveira

Espindola

et al. 2011

XI Brazilian Power Electronics Conference

View full text Add to dashboard Cite

show abstract

“…The effect of the feedback compensation depends on the closed-loop bandwidth. Instantaneous current feedback was proposed to suppress the ripple current, where the closed-loop output is used to correct the modulation depth by using the feedback current of the motor and the instruction current [5]. However, in the application of high power and a low switching frequency, the bandwidth of the current loop is limited.…”

Section: Introductionmentioning

confidence: 99%

Ripple Analysis and Control of Electric Multiple Unit Traction Drives under a Fluctuating DC Link Voltage

Diao¹,

Dong²,

Yin³

et al. 2016

Journal of Power Electronics

View full text Add to dashboard Cite

The traction motors in electric multiple unit (EMU) trains are powered by AC-DC-AC converters, and the DC link voltage is generated by single phase PWM converters, with a fluctuation component under twice the frequency of the input catenary AC grid, which causes fluctuations in the motor torque and current. Traditionally, heavy and low-efficiency hardware LC resonant filters parallel in the DC side are adopted to reduce the ripple effect. In this paper, an analytical model of the ripple phenomenon is derived and analyzed in the frequency domain, and a ripple control scheme compensating the slip frequency of rotor vector control systems without a hardware filter is applied to reduce the torque and current ripple amplitude. Then a relatively simple discretization method is chosen to discretize the algorithm with a high discrete accuracy. Simulation and experimental results validate the proposed ripple control strategy.

show abstract