Matlab/Simulink Research Papers - Academia.edu (original) (raw)

Systems must follow many requirements, such as good efficiency, reduced cost and complexity and, most importantly, improved ability. This is generally achieved before the inversion stage by using the front-end dc-dc booster (BC) converter, leading to a two-step design. In the meanwhile, in terms of reducing the sophistication and volume of the whole system, single-stage power conversion systems that conduct the boosting process during the inversion step have some possible benefits. The split source inverter (SSI) has recently been proposed in[1] as an alternative solution with some interesting features to the commonly used Z-source inverter (ZSI) among many proposed alternatives. Taking into account that the SSI is regulated by a single parameter, i.e. its dc. The modulation index controls the ac and ac sides, and it is of the utmost importance to investigate its grid-connected control function, which has not yet been examined. This paper therefore models the SSI dc side and proposes a modified modulation scheme in accordance with the modulation scheme currently in use. The synchronous reference frame control technique is used to achieve a decoupled SSI control device in grid-connected mode, i.e. the dc and ac sides of the SSI can be controlled separately, which is useful for many applications. The MATLAB / Simulink model is used to test and simulate the applied control scheme, where a reduced scale of 1 kVA grid-connected SSI is designed and simulated for experimental validation purposes. Finally, a constructed infrastructure is placed in order to test and verify the reported research and simulations. Keywords: Shared Source Inverter (SSI), Z-Source Inverter (ZSI), front-end dc-dc boost converter (BC), Matlab, Simulink I. INTRODUCTION The deployment of various renewable energy sources (RESs) to the power grid is gradually increasing, in which the role of power electronics technology in the energy conditioning process used is of vital importance in meeting several requirements[2],[3]. These specifications range from the input side , i.e. the RES, to the output side , i.e. the power grid. For the input side, the management of the RES operating point and the regulation of its output voltage are mandatory issues to be considered due to their reliance on differing climatic conditions[4],[5]. In the meantime, complex control systems are being applied for the output side in order to meet with the quality specifications, e.g. the low harmonic quality of the injected line current[6]. Over the last few years, single-stage power conversion systems have undergone rapid development to replace the traditional two-stage architecture, which includes the front-end dc-dc boost converter (BC) and the VSI output source inverter (VSI)[7],[8]. This evolution has evolved to boost overall machine efficiency in terms of reducing the scale, weight and complexity. Most of these single-stage topologies and their numerous modulation schemes have been examined in[1],[8],[9]. The split-source inverter (SSI) shown in Fig is one of these various single-stage solutions. 1(a) has recently been suggested in[1] as a single-stage dc-ac power converter topology to address certain demerits in other single-stage topologies, such as the discontinuity of the input current and the dc-link voltage.