ABSTRACT The local voltage control in Distribution Generation (DG) is most important task. The proportional - Integral (PI) controller is used to control the voltage of three phase inverter in Distributed Generation System. The system is expressed on d-q frame transformation for MATLAB-simulink. The proposed work is to analysis Distributed Generation Voltage Source Inverter-DGVSI in time and frequency domain. The gain of standalone solar inverter conventional controller is determined by Ziegler Nichol’s, flter parameter time constant and PID tuner in MATLAB. The analysis is done with the help of results found by step response, frequency response and output voltage waveform. The studied system is modeled, simulated and analyzed in MATLAB-SIMULINK environment. KEY WORDS: CONTROLLER, DISTRIBUTION GENERATION, RENEWABLE ENERGY SOURCES, POWER ELECTRONICS. Gain Scheduling Analysis of Conventional Controller for Output Voltage Control of Distributed Generation Voltage Source Inverter-DGVSI by Different Methods Nalini Karchi 1 , Deepak Kulkarni 2 and Sujata Patil 3 1 Department of Electrical and Electronics, KLE Dr M S Sheshgiri College of Engineering, Belagavi India, 2 Department of Electrical and Electronics Engineering, KLE Gogte Institute of Technology, Belagavi, India 3 Department of Electrical and Electronics, KLE Dr M S Sheshgiri College of Engineering, Belagavi India, 100 ARTICLE INFORMATION *Corresponding Author: nnnalini2000@rediff.com Received 8th Oct 2020 Accepted after revision 27th Dec 2020 Print ISSN: 0974-6455 Online ISSN: 2321-4007 CODEN: BBRCBA Thomson Reuters ISI Web of Science Clarivate Analytics USA and Crossref Indexed Journal NAAS Journal Score 2020 (4.31) A Society of Science and Nature Publication, Bhopal India 2020. All rights reserved. Online Contents Available at: http//www.bbrc.in/ Doi: http://dx.doi.org/10.21786/bbrc/13.13/14 Biosc.Biotech.Res.Comm. Special Issue Vol 13 No 13 (2020) Pp-100-106 INTRODUCTION The power system consists of conventional and non conventional generating units. In modern power system, the role of power electronics components and distributed generation is well understood. There are many advantages of connecting distributed generation to power grid. The connection of distributed generation to power grid is through electronics devices. ‘Distributed generation’ is either permanently or timely present with power grid (Puttamadappa, C. et al 2019). As they are not actively participating all the time, may incorporate the technical challenges in the power grid. Before the connection of ‘DG’ to the grid, the local voltage of ‘Distributed generation-DG’ has to be maintained according to the standards. Many factors are affecting on the output of DG. The output of DG is infuenced by the type of load and its nature. The voltage of DG has to be maintained constant irrespective all loads. It is very necessary that some extra controlling devices are required to control the DG output. To maintain the power quality, many system parameters are required to be monitored and controlled. The local voltage control of DG is also the essential parameter which to be controlled. As the ‘distributed generation’ is interacted to the power grid through power electronic devices, the control of output voltage has become easy. The output of power electronics circuit is controlled by using the traditional PI controller. In the paper the controller constants are determined by traditional methods (Math HJ, 2018). The renewable energy based electrical generation units are located at the distribution network. So they are called as distributed generation (fg 1). They are small