International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-9 Issue-1, October 2019 424 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Retrieval Number: A3188109119/2019©BEIESP DOI: 10.35940/ijeat.A3188.109119 Abstract: This paper attempts to highlight the effect of change in load and irradiance on Photovoltaic integrated Power system network. The Power system network considered here is IEEE 14 bus system. The simulation is done on MATLAB platform and variation of Voltage, Power and Total Harmonic Distortion (THD) has been studied. The results indicates that how power quality of the power system is affected by the irradiance on Photovoltaic cell. The study is performed considering the other environmental factors such as wind velocity, ambient temperature and humidity have a negligible effect on the photovoltaic module. In a steady-state controlled environment, the simulation results show that the output voltage, current and its power decrease with time as the irradiance on the photovoltaic panel decreases. Keywords: Photovoltaic cell, panel temperature, power quality, solar irradiance. I. INTRODUCTION Now a days, the global power industry is transiting towards the Renewable energy system. This is not only to mitigate the increasing demand of power throughout the world but also to protect the environment from adverse effects of burning of fossil fuels. It is well known that to get a clean as well as reliable power supply both the renewable and renewable energy system source should be work together and as a result the integration of Photovoltaic (PV) systems is increasing drastically. However, utility companies may be concerned about the implications of variable solar generation on the power quality, its impact on the low-tension (LT) distribution grid. Therefore, there are lot of challenges and issues in integrating distributed energy sources like Photovoltaic (PV) systems [1]. The grid integrated system has some responsibility to maintain a reliable grid supply with respect to harmonics [2], flicker [3], and DC injection [4] as they are connected to a power system network. Hence due to the power quality problems power converters are required for interface with grid. Solar photovoltaic (PV) needs only power electronic converters like DC to DC and DC to AC for interconnection. There are three basic interfacing technologies for PV module [5]. Fig. 1 represents block diagram of grid integrated PV Revised Manuscript Received on October 05, 2019 * Correspondence Author Rabindra Nath Shaw*, Department of Electronics & Communication Engineering, Galgotias University, India Debayan Basu, Development Consultant Private Limited, India Pratima Walde, Department of Electronics & Communication Engineering, Galgotias University, India Ankush Ghosh, School of Engineering and Applied Science, The Neotia University, India. system. Fig. 1 Block Diagram of Grid Integrated PV System II. MATERIALS AND METHODS Fig. 2 represents equivalent circuit of an actual PV cell. The photovoltaic current of the PV cell is Here, I ph : Photovoltaic current of the PV cell I sc : Short circuit current K i : Temperature factor of short circuit current T c : PV cell temperature (in Kelvin) T r : Reference temperature G: Solar radiation level under W/m² G r : Reference solar radiation level (1000 W/m²) Fig 2. The circuit of PV cell[6] Effects of Solar Irradiance on Load Sharing of Integrated Photovoltaic System with IEEE Standard Bus Network Rabindra Nath Shaw, Debayan Basu, Pratima Walde, Ankush Ghosh (1)