Diseño de D-STATCOM controlado por teoría de componentes simétricos instantáneos (ISCT) para disminuir armónicos y corregir el factor de Potencia en sistemas de distribución eléctrica ante la presencia de cargas no lineales

El presente trabajo académico de investigación propone un método de compensación tipo D-STATCOM (Compensador estático de distribución) es mediante la Teoría de Componentes Simétricos Instantáneos (ISCT). Diseñado para la compensación de sistemas de distribución eléctrica desbalanceados, con el fin de reducir la distorsión armónica y corrección de factor de potencia. Esta teoría (ISCT) descompone las señales de corriente y voltaje para análisis de contenido de armónicos. Se planteó 2 casos de análisis donde se integra cargas no lineales con alta generación de armónicos. En el caso 1 se busca analizar la operación del D STATCOM integrándolo a un sistema trifásico desbalanceado donde se conectará en periodos de tiempo de 0.05[seg]. Los resultados alcanzados fue la disminución de armónicos que se mantiene dentro de los limites mencionados en el documento y la mejora de factor de potencia que oscila entre los 0.85 a 0.97. El caso 2, se analiza un sistema de distribución eléctrica IEEE de 13 barras desbalanceado para demostrar la compensación del D STATCOM. Como resultado de lo antes mencionado existe corrección del factor de potencia de 0.85 a 0.92 además reducción de distorsión de armónicos de voltaje de 24.49% a 5.19% y de corriente de 19.62% a 10.81% con el objetivo de reducir el porcentaje de armónicos y la mejora de factor de potencia.The present academic research work proposes a compensation method type D-STATCOM (Static Distribution Compensator) is by means of the Instantaneous Symmetric Components Theory (ISCT). Designed for the compensation of unbalanced electrical distribution systems, in order to reduce harmonic distortion and power factor correction. This technique (ISCT) decomposes current and voltage signals for harmonic content analysis. Two analysis cases were proposed where non linear loads with high harmonic generation are integrated. In case 1, it is sought to analyze the operation of the D STATCOM by integrating it into an unbalanced three-phase system where it will be connected in periods of time of 0.05 [sec]. The results achieved were the reduction of harmonics that remains within the limits mentioned in the document and the improvement of the power factor that ranges from 0.85 to 0.97. For case 2, an unbalanced IEEE 13- bar unbalanced distribution system was analyzed. As a result, in the case studies there is a power factor correction from 0.85 to 0.92, in addition to a reduction in the distortion of voltage harmonics from 24.49% to 5.19% and the current of the 19.62% to 10.81%. in order to reduce the percentage of harmonics and the power factor improvement

Power Quality Enhancement in Sensitive Local Distribution Grid Using Interval Type-II Fuzzy Logic Controlled DSTATCOM

In the current scenario, integration of renewables, growth of non-linear industrial and commercial loads results in various power quality issues. Among commercial utilities connected to the grid, hospital-operated loads include sensitive, linear, non-linear, and unbalanced loads. These loads are diverse as well as prioritized, which also causes major power quality issues in the local distribution system. Due to its widespread divergence, it leads to harmonic injection and reactive power imbalance. Distribution Static Compensator (DSTATCOM) is proposed as a solution for harmonic mitigation, load balancing, reactive power imbalances, and neutral current compensation. The present work utilizes Interval Type-2 Fuzzy Logic Controller (IT2FLC) with Recursive Least Square (RLS) filter for generating switching pulses for IGBT switches in the DSTATCOM to improve power quality in the Local Distribution Grid. The proposed approach also shows superior performance over Type 1 fuzzy logic controller and Conventional PI controller in mitigating harmonics. For effective realization, the proposed system is simulated using MATLAB software

Brief Review on Identification, Categorization and Elimination of Power Quality Issues in a Microgrid Using Artificial Intelligent Techniques

Power quality is the manifestation of a disruption in the supply voltage, current or frequency that damages the utility equipment and has become an important issue with the introduction of more sophisticated and sensitive devices. So, the supply power quality issue still remains a major challenge as its degradation can cause huge destabilization of electrical networks. As renewable energy sources have irregular nature, a microgrid essentially needs energy storage system containing advanced power electronic converters which is the root cause of majority of power quality disturbances. Also, the integration of non-linear and unbalanced loads into the grid adds to its power quality problems. This article gives a compact overview on the identification, categorization and mitigation of these power quality events in a microgrid by using various Artificial Intelligence-based techniques like Optimization techniques, Adaptive Learning techniques, Signal Processing and Pattern Recognition, Neural Networks and Fuzzy Logic

Enhancing Power Quality in Microgrids With a New Online Control Strategy for DSTATCOM Using Reinforcement Learning Algorithm

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8403205To mitigate the power quality issue in microgrids, a new online reference control strategy for distribution static compensator using the reinforcement learning algorithm is presented. The new controller is supposed to compensate the reactive power, harmonics, and unbalanced load current in a microgrid utilizing voltage and current parameters. Voltage controller is used to adjust the set point of the reactive power reference, whereas the current based controller tries to compensate the unbalanced load current in distributed resource network through the quadrature axis (q-axis) and zero axis (0-axis). The proposed control strategy is applied to an autonomous microgrid with a weak ac-supply (non-stiff source) distribution system under different loads as well as three-phase fault conditions. Different scenarios are studied and simulation results for various conditions are discussed. The performance of the proposed online secondary control strategy is also discussed in detail