Adaptive reactive power injection by solar PV inverter to minimize tap changes and line losses

2016 ◽  
Author(s):  
Anubrata Das ◽  
Ankul Gupta ◽  
Saurav Roy Choudhury ◽  
Sandeep Anand
Keyword(s):  
Reactive Power ◽  
Solar Pv ◽  
Pv Inverter ◽  
Power Injection

scholarly journals Independent Active and Reactive Power Control for Single Stage H8 Transformer-less Solar PV Inverter

2021 ◽  
Author(s):  
D.V.N Ananth ◽  
L.V. Sursh Kumar ◽  
D.A. Tatajee
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Rapid Development ◽  
Test System ◽  
Active Power ◽  
Single Stage ◽  
Solar Pv ◽  
Reactive Power Control ◽  
Pv Inverter ◽  
Active And Reactive Power

With the rapid development in power electronics technologies and solar photovoltaic (PV) cells, the interest in solar PV cell-based electric power generation and other applications is increasing more incredibly. For low power grid or direct load applications, single-stage solar PV inverters without transformers are advantageous. Based on this concept solar single-stage eight switch H8 based transformerless solar PV inverter is proposed. The objective of the work is to present a control scheme for the H8 inverter to have better power handling capability and for independent active and reactive power control. For this, the test system is studied using MATLAB/ SIMULINK software under three cases (i) constant active power and varying reactive power, (ii) varying active power and constant reactive power, and (iii) varying both active and reactive power. The proposed inverter is compared with single-stage solar PV with two switches boost and six switches inverter topology. It is found that power flow ripples and surges are lesser for proposed H8 than with single-stage topology.

scholarly journals Voltage Profile and Sensitivity Analysis for a Grid Connected Solar, Wind and Small Hydro Hybrid System

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3555
Author(s):  
Noah Serem ◽  
Lawrence K. Letting ◽  
Josiah Munda
Keyword(s):  
Sensitivity Analysis ◽  
Renewable Energy ◽  
Wind Power ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Test System ◽  
Solar Pv ◽  
Voltage Profile ◽  
Hydro Power ◽  
Power Injection

Due to increase in integration of renewable energy into the grid and power quality issues arising from it, there is need for analysis and power improvement of such networks. This paper presents voltage profile, Q-V sensitivity analysis and Q-V curves analysis for a grid that is highly penetrated by renewable energy sources; solar PV, wind power and small hydro systems. Analysis is done on IEEE 39 bus test system with Wind power injection alone, PV power injection alone, with PV and wind power injection and with PV, wind and micro hydro power injection to the grid. The analysis is used to determine the buses where voltage stability improvement is needed. From the results, it was concluded that injection of the modeled wind power alone helped in stabilizing the voltage levels as determined from voltage profiles and reactive power margins. Replacing some of the conventional sources with PV power led to reduction of voltages for weak buses below the required standards. Injection of power from more than one renewable energy source helped in slightly improving the voltage levels. Distribution Static compensators (D-STATCOMs) were used to improve the voltage levels of the buses that were below the required standards.

LV Grid Voltage Regulation Using Transformer Electronic Tap Changing, With PV Inverter Reactive Power Injection

2015 ◽  
Vol 3 (4) ◽  
pp. 1182-1192 ◽  
Author(s):  
Roozbeh Kabiri ◽  
Donald Grahame Holmes ◽  
Brendan P. McGrath ◽  
Lasantha Gunaruwan Meegahapola
Keyword(s):  
Reactive Power ◽  
Voltage Regulation ◽  
Grid Voltage ◽  
Pv Inverter ◽  
Power Injection

scholarly journals Management of a Solar-PV System with Energy Storage

2021 ◽  
Vol 19 (3) ◽  
pp. 233-245
Author(s):  
Shital Thorat ◽  
Vaiju N Kalkhambkar
Keyword(s):  
Energy Management ◽  
Reactive Power ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Solar Pv ◽  
Pv System ◽  
Static Synchronous Compensator ◽  
Pv Inverter ◽  
Solar Pv System ◽  
Remaining Capacity

A solar-PV system is generally connected to distributed generation (DG) by the utility grid. The solar inverter retains some capacity after active power generation. Reactive power compensation can be achieved by utilizing the remaining capacity of the solar-PV inverter. This paper introduces an energy management system (EMS) for real and reactive power management. The proposed EMS includes two modes: PV-STATCOM and islanding. In PV-STATCOM mode, the PI control is used whereas for the islanding mode, voltage frequency control is employed. This paper proposes the energy management of reactive power by utilizing the solar photovoltaic (PV) inverter as a static synchronous compensator (PV-STATCOM). Therefore, no other additional flexible AC transmission system controllers or series/shunt capacitors are required. During the islanding mode, the storage provides continuous supply to the load. The system is simulated using single-phase and three-phase modes with the hardware results also revealed. The proposed scheme provides a significant improvement in power factor while reducing the total harmonic distortion.  

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