Grid-tied Converter with Intermediate Storage Chain for Multipurpose Applications

2013

Self Cite

Results of research of the converter control possibilities in the grid-tied renewable energy power plant are presented in this paper. Converter of the power plant consists of the DC chopper and the grid-tied inverter connected in series. Quality of the converter operation depends both on the DC chopper and inverter operation. Two ways of the converter operation control were researched: control of the DC chopper operation and control of the grid-tied inverter operation.Combination of both ways of the converter operation control has to be applied in order to achieve maximum available power production and the best parameters of the converter operation quality, such as maximum available efficiency of the power plant and minimum total harmonic distortion factor.

Section: Object Of Researchmentioning

confidence: 99%

Section: Object Of Researchmentioning

confidence: 99%

Section: Object Of Researchmentioning

confidence: 99%

Section: Investigation Of the System Operationmentioning

confidence: 99%

“…Constant block Fim refers phase value of the modulation voltage of inverter. Model of the inverter is used the same as it was in the previous publication of the authors [3].…”

Section: Mathematical Model Of the Researched Systemmentioning

confidence: 99%

See 3 more Smart Citations

Research of the Converter Control Possibilities in the Grid-tied Renewable Energy Power Plant

2013

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Research of the Reactive Power Control Possibilities in the Grid-tied PV Power Plant

2013

Self Cite

Results of control possibilities research of the reactive power generated by grid-tied PV power plant are presented in this paper. The innovative grid-connected inverter with the intermediate power storage chain (DC/DC converter) is used for the PV power plant. The converter operates well when DC input voltage generated by the PV source changes in a wide range. Mathematical description for the circuit part between the inverter output and the grid is presented. Detailed researches of PV system were carried out by means of the mathematical simulation. The researches disclosed dependence of the system reactive power on the phase of sinusoidal modulation voltage of the inverter. It is defined that phase of the modulation voltage must be positive and can vary in the range 0÷20 degrees. Researches show that researched PV system can generate the capacitive reactive power for compensation of the inductive reactive power of the grid.Operation mode of the system when the reactive power is equal to zero can be achieved in this system. It is defined that electromagnetic distortion (THD) of the grid has maximal value at the point when the reactive power is equal to zero. Consequently, this feature must be evaluated at the design of the inverter filter.

Development of Control System of the Single Phase Multi-input Inverter for Microgrids

2014

Scheme of the small-scale microgrid inverter control system is investigated and described. The researched microgrid is intended for small-scale power users, which maximum capacity does not exceed 5 kW. Results of the control system research are presented. Method of mathematical modelling was used for researches of the system. The MATLAB/SIMULINK model was worked out for this purpose. The model was based on the SymPowerSystems library. The main target of the researches was active and reactive power control in the microgrid. The curves reflecting the possibility and quality of the independent active and reactive power control in the microgrid are presented and discussed.