Power quality improvement using solar PV H-bridge based hybrid multilevel inverter

Abstract

This paper proposes a novel H-bridge based hybrid multilevel inverter consists of small number of switching devices and output of H-bridge multilevel by switching the solar PV voltage sources in series and parallel. The proposed H-bridge multilevel inverter reduces number of switching devices which reduces the power consumption and size of the gate driver circuits. The proposed inverter gives more number of output voltages which reduces total harmonic distortion of the output voltage waveform. The hybrid modulation method is used to control H-bridge multilevel inverter. The proposed inverter is validated through simulation results are validated by using MATLAB/SIMULINK.

Simulation of industrial solar photovoltaic station with transformerless converter system

“…1, b) to connect ar rays of photovoltaic modules to the industrial network. The special feature of the organization of the power transmission systems in this case is the combination of the ACside convert ers or the DCside arrays of PV modules and the use of a net work transformer for galvanic isolation of the 380 V and 6 (10) kV networks [2]. An alternative is a power plant design combining arrays of singlephase alternating current photo voltaic modules [6,7], allowing for high output voltage quality [8,9].…”

“…An alternative is a power plant design combining arrays of singlephase alternating current photo voltaic modules [6,7], allowing for high output voltage quality [8,9]. This principle underlies many forwardlooking topolo gies [10,11], including those with an asymmetric structure [12], one of which is the use of a highvoltage multilayer cas cade converter without a network transformer (Fig. 1, c) [13,14].…”

“…1, c) [13,14]. The absence of a transformer means that it is possible to connect solar power plants directly to the 6 (10) kV grid or to 35 or 110 kV district substations through 10/110 kV high voltage stepup transformers. Furthermore, the cascading principle of the inverter build up makes it possible to solve a number of problems, among which is the provision of an individual MPP tracker for each cell of the converter and ensuring symmetrical phase loading by the SPP generated current [13].…”