False Data Injection (FDI) attacks can be injected into the communication links of microgrids and result in significant damages. An approach to detect false data injection (FDI) attacks is introduced and a method to maintain the average voltages of buses within an acceptable range is suggested. To this aim, the impacts of FDI are first studied and a detection mechanism is extracted based on the attack effects. Then, multiple local integral feedback is employed to maintain the voltages within a permitted interval. Next, the procedure to return the values to their initial conditions (following the removal of the attack) is addressed. Finally, the proposed methods are simulated by multiple attack scenarios and validated using experimental tests.

In this paper, a novel control system structure is introduced for generating a sinusoidal wave on the differential boost inverter terminals using inverse model approach.To address the high-frequency resonance issues, an active damping technique is proposed. Proportional-resonant controllers are designed for tracking and harmonic rejection. Pulling direct and constant current from photovoltaic panels as the DC source is essential in maximum power point tracking. Therefore, a decoupling controller is utilised to suppress current oscillations. An innovative combination of tracking controller, harmonic rejector, and decoupling controller is proposed in order to provide a sinusoidal voltage output for linear and nonlinear loads with low total harmonic distortion. The proposed method reduces the number of controllers by half compare to conventional methods. In addition to simulation, experimental results show the effectiveness of the proposed method. INTRODUCTIONNowadays, using green energy is a necessity for the world to reduce air pollution. Among all green energies, photovoltaic (PV) plays a crucial role. Lots of researches have been performed on the extracting maximum energy of photovoltaic panels, so-called maximum power point tracking (MPPT) [1][2][3][4][5]. The main output result of MPPT is to determine the value of a panel current and voltage to pull maximum energy. The output voltage and current of PVs are DC. Since many loads and grids are AC, therefore, to use this energy, applying a DC/AC inverter is unavoidable. On the other hand, the output voltage is low. Hence, it is necessary to be boosted. Two major approaches are used to convert the panel's DC voltage into usable AC. The first and most common approach benefits of two stages [6-8]. In the first stage, a DC/DC boost converter is used. This stage, not only boosts the voltage, but also performs decoupling task. In the second stage, the DC signal is inverted to AC. This AC wave may be connected to loads (Standalone: SA) or grid (Grid connected: GC) [6, 7, 9-14]. The second approach uses just one stage, in which boosting and inverting are accomplished in this stage, simultaneously. Several topologies are introduced This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.