International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 05 | May 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 6404 Frequency Control of Distributed Generators in Microgrid with ANFIS Controller K. Hema 1 , P. Maruthupandi 2 1 M.E II year, Department of EEE, Government College Technology, Coimbatore, India 2 Assistant Professor, Department of EEE, Government College Technology, Coimbatore, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Frequency deviation is the major problem in microgrid due to the varying power output from the renewable energy sources. In this paper, solar and wind are taken as prime source of power. Since the renewables lack inertia diesel-generator is used to provide inertia to the system and energy storage devices are used. The proposed controller has less settling time compared to the conventional controllers. Artificial neuro-fuzzy inference system (ANFIS) controller combines the features of fuzzy and neural and has improved performance where the fuzzy rules modify the network according to the power output. The results are obtained using MATLAB/Simulink model. Key Words: renewables, frequency deviation, settling time, fuzzy, ANFIS. 1. INTRODUCTION A hybrid energy system might consist of various renewable energy conversion component like wind turbine, PV array and hydro turbines as well as conventional non-renewable generators like diesel generators, and storage devices. To overcome the incredible power crisis in the country, the best way is to make use of renewable energy sources. It is inexhaustible and non-polluting. It has the advantages of low running and maintenance cost and also noiseless operation. The voltage power characteristic of a photovoltaic (PV) array is nonlinear and time varying because of the changes caused by the atmospheric conditions [1]. When the solar radiation and temperature varies, the output power of the PV module is also getting changed. But to get the maximum efficiency of the PV module it must be operated at maximum point,so it is necessary to operate the PV module at its maximum power point for all irradiance and temperature conditions[2]. To obtain maximum power from photovoltaic array, photovoltaic power system usually requires maximum power point tracking controller (MPPT). Block diagram of the microgrid is shown in fig.1. Here Solar, wind, diesel are used as prime source of power production and energy storage devices such as battery and fuel cell are used. The power produced from PV array is varying according to irradiance and temperature hence a zeta converter is used to boost the voltage level. Inverter is used before connecting to the load. Similarly wind, battery and fuel cell are simulated in the same fashion as earlier. Fig -1: Block diagram of test system Paper is as follows. In introduction an overview is given. Solar panel is simulated along with converter and inverter. Wind energy conversion system is modelled followed by diesel engine generator and energy storage units such as battery and fuel energy storage systems. Initially PI controller is used to attain stability and the proposed controller is implemented which shows improved performance which are discussed in the results section. 2. MODELLING COMPONENTS 2.1. PV ARRAY Photovoltaic cells are connected electrically in series and/or parallel circuits to produce higher voltages, currents and power levels. Photovoltaic modules consist of PV cell circuits sealed in an environmentally protective laminate, and are the fundamental building blocks of PV systems. Photovoltaic panels include one or more PV modules assembled as a pre-wired, field-installable unit. A photovoltaic array is the complete power-generating unit, consisting of any number of PV modules and panels. The performance of PV modules and arrays are generally rated according to their maximum DC power output (watts) under Standard Test Conditions (STC). Standard Test Conditions are defined by a module (cell) operating temperature of 25o C (77o F), and incident solar irradiance level of 1000 W/m2 and under Air Mass 1.5 spectral distribution. Since these conditions are not always typical of how PV modules and arrays operate in the field, actual performance is usually 85 to 90 percent of the STC rating.