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In this paper, it is proposed a robust Second-Order Super-Twisting Sliding Mode Control for a Grid-connected inverter of a PV power plant. The proposed control strategy is able to maximize the energy extracted from the PV while regulating the DC-link voltage and achieving a power factor compensation and the reduction of currents harmonic distortion. Both in balanced or unbalanced condition, the grid...
In this article, a current control algorithm is conceived for converting solar dc power into ac power of high-quality. This conversion is based only on a dc-ac converter, avoiding the use of two stage converter. The proposed algorithm is founded on tracking the maximum power point which ensures controlling the electrical power exchanged with the grid. To assure a good dynamics and reduce the control...
In this paper a new electric power structure for solar powered unmanned aircraft system is proposed. The presented topology is a prospective improvement to both Solong and Zyphyr models. The proposed UAS model utilized Zyphry UAS by using ac bus-line instead of dc bus-line to supply the propellers. The system involves PV array, lithium sulfur based energy management system, dc bus-line, inverter,...
The current paper explores a solar and wind energy system that is capable of operating in both: on-grid and off-grid regimes. The system contains two on-grid and one off-grid inverter for that purpose. The off-grid operation of the analyzed system is more vulnerable to instabilities. Experiments where made to show how inrush currents of electrical loads cause transient processes in such a renewable...
In this study, a three-phase four switch inverter topology is proposed for PV systems. In power stage, a three-level neutral point clamped inverter is adopted. Thus, advantageous of the multilevel inverter topologies have been obtained with reduced number of switches. The proportional-resonant controller is designed to control the output voltage of the inverter to maintain a sinusoidal output voltage...
This paper shows the design of a solar tree PV system for charging mobile devices on open urban areas. The solar unit tree was designed according to the environmental conditions of Medellin. Based on the electric consumption calculations of mobile devices, a 3.5 m height-tree was built. It has four leaves made of acrylic with solar panels on the top (SOW sized 54 × 83.2 cm). It illuminates with cold...
This paper presents a two-stage optimization approach to mitigate the rapid voltage fluctuations and minimize the power losses of distribution systems due to the high penetration of photovoltaic (PV) generation. The first stage is a day-ahead optimal strategy which aims to minimize the total voltage deviations and power losses within the constraints of the daily maximum allowable number of operations...
Current source inverter (CSI) is a family of power converters which has been recently investigated for photovoltaic power conversion in grid-tied operation, due to the inherent boost capability and ease of control. This paper assess Photovoltaic three-phase Current Source Inverters by two different CSI topologies and space vector modulation commutation strategies. Different CSI solutions are therefore...
This paper proposes a new control method for two stage converters to realize the virtual synchronous generator (VSG) operation, which also can help eliminate circulating power between energy storage (ES) converters. It is proven in this paper that the proposed method shares stronger resemblances with synchronous generators (SGs) than traditional VSG in aspects of power conversion process and mathematical...
This paper focuses on the relevant content of the MVDC-connected photovoltaic system based on the modular cascaded structure. This paper proposes a new topology for the DC grid-connected photovoltaic system with a novel capacitor voltage balancing control strategy, including the module input power ratio feed forward and module capacitor voltage closed-loop control. The proposed control strategy is...
This paper describes technical details regarding the construction and economic viability of renewable energy sources, with particular reference to the techno-economic analysis of solar PV plants in the Republic of Serbia. The potentials of solar energy are described, as well as a chronological overview of various Regulations for privileged producers of electricity from renewable energy sources and...
We propose a class of dissipative dynamical systems whose performance is strictly improved via feedback connection. The proposed class characterizes dissipative properties of the dynamical systems with two parameters. The parameters enable us to quantitatively evaluate the dissipation performance of the system by the H∞ norm. Assuming that two subsystems belong to the proposed class, we show that...
In residential building sector, the provision of clean water is the one of primary need. The water pump used to do that matter. The technology for renewable energy source, i.e. Solar Water Pumping System (SWPS) will help the society in this sector to decrease the electricity consumption for providing clean water. The SWPS converts the solar energy into electricity. Then, the electricity used to activate...
Hybrid between PV and Generator with battery is one common technology that has been used in the world due to meet the system with the presence of renewable energy. These systems are typically used in isolated area or areas away from the grid. In this paper the hybrid PV-Generator with battery power plant will be designed for Aha Village in Morotai Island which is one island in Indonesia that located...
Wind power has an important place in renewable energy systems. Therefore, it is vital to make use of wind power systems by obtaining maximum efficiency. The energy produced by the wind power systems shows variance depending on the speed and direction of wind and in some cases the wind power may not be at the expected level for the on grid micro inverter. This study aims to increase energy sustainability...
It is believed that renewable energy can help to ease the shortage of fossil fuels, and to protect environment. Moreover, microgrid provides a practical way for renewable energy and electric vehicles to access the grid easily. In this paper, a PV hybrid DC/AC microgrid which based on the DC microgrid is proposed. It combines the advantages of simple control of DC microgrids and the novel uninterruptible...
This work presents an internet of things low cost instrument specially developed to measure and quantify the energy generation of photovoltaic panels. A hub was developed, capable of managing networks with hundreds of nodes, storing the data locally and being able to transmit relevant information to cloud services, besides that, hosts a HTML page for local and internet access to data. The sensor nodes...
This study covers grid-tied photovoltaic (PV) renewable energy (RE) resources and uses SynerGEE Electric 5.0 as a simulation tool for a distribution impact study (DIS). The DIS refers to a set of technical studies used to assess the possible effects of a proposed expansion, reinforcement, or modification of the distribution system or a user development, and to evaluate incidents. Despite its usefulness,...
Phase locked loop inverter synchronization method is the mostly used synchronization method for both single phase and three phase systems. Recent research has focused on the improvement of the performance of the phase lock loop inverter synchronization method under different grid conditions. The common phase locked loop synchronization techniques such as the Second Order Generalized Integrator based...
The proposition for this study is to assess how much simulation results can differ from real measurements on the implementation of a control strategy for a grid-connected PV inverter. The system is simulated in Matlab/Simulink and experimentally evaluated on a real low-voltage distribution grid. The PV inverter is implemented using a power-hardware-in-the-loop platform running the control algorithm...
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