Article Preview
TopStatic converter usage increased as a result of the expansion of power electronics applications. These static converters are becoming increasingly connected to power grids. The static converters mainly intended for the conversion and treatment of electrical energy between a source (electrical network, synchronous or asynchronous generators, battery, renewable sources ...) and a load (passive load, alternative machines, on-board network, etc.). The natural switching of power electronics converters is the reason why their behavior with respect to the energy source is non-linear. Unidirectional power flow, a low power factor, and a high amount of harmonic input currents are the main drawbacks of conventional rectifiers, which present substantial issues for electrical networks. They are one of the primary harmonic sources in distribution networks. These harmonics pollution can deteriorate the quality of the current and the voltage by propagating it into the network. Under some operational circumstances, static converters can produce a very high harmonic distortion rate (THDi). Due to this, appropriate international standards like IEEE standard 519 and IEC 61000 place restrictions on the current and voltage THDs in the supply network.
Numerous harmonic reduction techniques, such as those based on PWM rectifiers, are suggested in order to reduce the harmonic disturbance rate brought on by non-linear loads or power electronics linked to the grid (Lounnas et al., 2023; Dehnavi et al 2023; Hamida et al., 2023, 2022a,b,c; Alazrag et al., 2023; Othman et al 2023; Ardjal et al., 2023; Abdelmalek et al., 2021, 2018a,b). These PWM rectifiers provide a bi-directional power transfer, consume a current close to a sinusoid and can operate under a unit power factor. Several strategies for controlling PWM rectifiers are proposed in recent work (Djabali et al., 2021; Hadji et al., 2021) and classified into strategies are classified in two categories. The first approach relies on the current loop, whereas the second one relies on the power loop. The research (Alhasheem et al., 2020; Dragičević et al., 2020; Hornik & Zhong, 2010; Yin et al., 2008) demonstrates how internal loop currents, a form of indirect power regulation known as VOC (voltage-oriented control), ensure optimal dynamic and static performance. Another technique which is of interest, in the last few years presented initially by (Noguchi et al., 1996), where no internal loop of the current is used. It is based on the instantaneous power loops and consists in selecting a control vector according to a switching table (Yan & Hui, 2021). The latter is based on the angular position of the estimated voltage and the digitized error of the instantaneous active and reactive power. To identify the operating sector, the plane is divided into twelve sectors. The fact that this method's switching frequency is flexible is by far its biggest drawback. The Direct Power Control with Space Vector Modulation (DPC-SVM), which differs slightly from the DPC with switching table, is another structure that has been suggested in numerous research studies (Yan et al., 2021) to address the change of the switching frequency. In place of the hysteresis comparators, two proportional integral correctors (PI) are added, and the outputs of these two regulators are placed in a vector modulation block following a coordinate translation. Since the modulator already sets a limit on the current dynamics, these improvements enable operation at a constant switching frequency. Bouafia et al. (2009) presented a method for choosing the best control vector based on a fuzzy controller, which replaces the traditional switching table with a fuzzy logic-based controller. Predictive control model theories have recently increased in popularity (Kwak et al., 2014) and have been applied to direct power control to improve system performance (Song et al 2015). Another sort of direct power controller, dubbed predictive control of direct power control, has been presented based on the model's predictive control theory (Tang et al., 2022). A series of voltage vectors must initially be chosen throughout the implementation procedure. The cost function, which is generated as a function of expected values and power references, is then minimized to estimate the associated application time for these vectors. When the predictive direct power control technique is used, great control performance is usually attained. However, the behavior of the system can deteriorate due to the incorrect selection of the vector sequences.