International Journal of Electrical and Electronics Research ISSN 2348-6988 (online) Vol. 10, Issue 1, pp: (14-20), Month: January - March 2022, Available at: www.researchpublish.com
A solar panel integrated three-level inverter with improvised performance using fuzzy logic controller Anubhav Kumar Gupta1, Dr. Rajendra Murmu2 PG Student1, Assistant Professor2, Department of Electrical Engineering, BIT Sindri Dhanbad, India .
Abstract: In this paper a three level inverter is introduced operated with FIS control for optimized operation for performance improvement connected to a solar panel. Three level or NPC are a family of multilevel power converters that are characterized by the use of clamping diodes for guaranteeing the proper voltage sharing across the power switches. A fuzzy logic controller with 49 rule base is introduced for the generation of reference signals compared to high frequency triangular waveforms for generation of pulses for the inverter. The PV module is modeled in MATLAB simulink environment connected to the inverter for renewable application. The output results are generated by graphs with respect to time. Keywords: FIS (Fuzzy Interference System), NPC (Neutral Point Converter), PV (Photo Voltaic), MATLAB (Matrix Laboratory).
I. INTRODUCTION MOST industrial processes need to increase efficiency and reduce production costs. This is achieved by increasing the size of installations and increasing the power of all electrical machines and equipment. This increase in power is reached in two ways: 1) by developing high-voltage semiconductors with voltage blocking capabilities of 3300, 4500, and 6500 V and2) by developing a multilevel inverter. Now, it is possible to directly connect the power converter to the mediumvoltage (MV) network. At low voltage, there is a single topology that dominates the market: the voltage-source two-level inverter. However, at medium and high voltages, the situation is completely different. A wide variety of topologies share the market and the applications of industrial MV drives [1, Fig. 1]. In effect, for high-power applications, it is possible to use direct converters (cyclo-converters) or indirect converters (with current or voltage dc link). The continuous development of high-voltage insulated-gate bipolar transistors (IGBTs) and integrated-gate commutated thyristors (IGCTs) and the application of these power semiconductors in several multilevel voltage-source converter (VSC) topologies have led to a drastic increase of the nominal voltage and power ratings of self-commutated converters in recent years. Pulsewidth modulation (PWM) VSCs have replaced thyristor-based converters in a wide range of applications. This is largely due to substantial system advantages, such as increased availability due to ride through capability and/or a redundant converter design, drastically improved dynamic performance, extended operating range, reduced line harmonics, and an adjustable power factor at the point of common coupling. Highly popular are the voltage-source multilevel inverters, which can be divided into three categories, according to their topology: neutral point clamped (NPC), flying capacitor (FLC), and cascade H-bridge [1], [2].Among the high-power converters shown in Fig. 1, the NPC inverter introduced 25 years ago is the most widely used in all types of industrial applications [3], [4], in the range of 2.3 to4.16 kV, with some applications up to 6 kV. This paper presents a survey of the most relevant developments of this topology: concerning the modulation strategies and control methods, as well as the efficiency and use of power semiconductors. New topologies like the active NPC (ANPC) inverter are also discussed. Special attention is paid to the use of these inverters in non-regenerative and regenerative applications. Finally, the future of development in operation, control, and applications is highlighted. Fig.1 shows the power circuit of the three-level diode-clamped inverter. The clamping diode dc is used to connect the neutral point N to the midpoint of the transistor. This neutral N, generating an additional voltage level, yields the name “three-level inverter.”
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