Analysis of the Topologies of Power Filters Applied in Distributed Generation Units - Review

Crepaldi, Juliano; Amoroso, Marcelo Marcos; Ando, Oswaldo Hideo

doi:10.1109/tla.2018.8447354

Cited by 19 publications

(11 citation statements)

References 15 publications

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“…Consequently, for power converters used in applications prone to the appearance of these disturbances, microgrids [7], [8], [10]- [12], PFCs [13], [14] or active filters [15]- [18], the reliability analysis has to take into account the appearance of these disturbances. Omitting them from the analysis can lead to wrong estimations of the system's reliability.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Current Distortion and Unbalanced Loads on Semiconductors Reliability

et al. 2021

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This article presents a reliability analysis of a 4-wire grid-tied inverter under different loading conditions, considering unbalanced loads and harmonic distortion in the current consumed. The proposed power converter is used as a case study to assess the impact of current disturbances on the semiconductors' reliability. The 4-wire inverter analyzed is implemented with a 3-leg SiC MOSFET power module and a neutral wire connected to the midpoint of the DC-link. The analysis is founded on the reliability curves for power switches provided by the literature. As key take-home findings, the addition of harmonic content in the load current plays a dominant role in the semiconductors' expected lifetime, especially for the lowfrequency harmonics, e.g., third harmonic. Furthermore, the phase delay of the harmonic current content is revealed as a critical factor in the semiconductor's reliability. Additionally, the existence of unbalanced loads substantially modifies the reliability of the semiconductors of the inverter. The results confirm that converters' reliability is highly dependent on the loading conditions and harmonic content, so identifying the most critical conditions is inevitable.

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Section: Discussionmentioning

confidence: 99%

“…Finally, active filters are typically used to balance the current consumed from the grid and, at the same time, eliminate the current harmonic content [15]- [18]. Consequently, its current usually is unbalanced between phases and presents a high harmonic distortion.…”

Section: Introductionmentioning

confidence: 99%

Effect of Current Distortion and Unbalanced Loads on Semiconductors Reliability

et al. 2021

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“…Ainda, para que o inversor opere como um GD (isto é, injetando potência ativa na rede) é necessário que haja uma fonte de energia renovável (FER) em seu barramento CC. Para operar como um FAP compensando termos não ativos de corrente, de forma geral, o GD multifuncional não requer uma FER [7], [8].…”

Section: A Topologia Elétrica Para Compensação Através De Inversores Multifuncionaisunclassified

“…Consequentemente, além de propiciar maior integração de geradores distribuídos (GDs) em redes elétricas, tais inversores podem contribuir para a melhoria da qualidade da energia no seu ponto de acoplamento comum (PAC), operando também como um filtro ativo de potência (FAP) [6]- [9]. Tal flexibilidade de operação em tarefas de filtragem ativa é possível pois a infraestrutura de potência e controle de um GD é, de forma geral, a mesma que a de um FAP [8], com exceção da fonte geradora de energia no seu barramento CC. Portanto, mesmo que não seja possível injetar potência ativa durante alguns períodos, apenas adotando as referências de controle adequadas, um GD multifuncional pode operar como um FAP e compensar correntes reativas, de desequilíbrio e de distorção, assim como validado em [6,7,10,11].…”

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Optimized Exploitation of Ancillary Services: Compensation of Reactive, Unbalance and Harmonic Currents Based on Particle Swarm Optimization

Alonso

Pereira

Brandão

et al. 2021

IEEE Latin Am. Trans.

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Taking into account the growth of distributed generation systems in low-voltage networks, it is important to fully exploit the energy resources and their embedded power converter. Thus, this paper proposes an optimization strategy for controlling the multifunctional inverter endowed in the distributed generator. Such approach allows maximum exploitation of its power capabilities under condition of high active power generation, and limited capability for performing ancillary services. Consequently, grid-support functions can be efficiently provided by the inverter, enhancing the power quality in low-voltage grids. The proposed approach is based on Particle Swarm Optimization and takes advantage of definitions from the Conservative Power Theory to synthesize the control references for the compensation of reactive power, as well as unbalance and harmonic distortion currents. Simulation results performed using Matlab/Simulink are presented to evaluate the optimization model for a three-phase system.

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“…Fig. 4 Distribution system configuration with SAPF monics generated by their inverters [46]. These filters can potentially cause severe negative impacts on the system if not properly designed.…”

Section: Uɵlity Gridmentioning

confidence: 99%

An analytic hierarchy process-based novel approach for benchmarking the power quality performance of grid-integrated renewable energy systems

Bajaj

Singh

2020

Electr Eng

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The technical, social, economic as well as environmental multi-benefits of renewable energy sources do not come without certain power quality (PQ) challenges, and deterioration of voltage and current quality is foremost among them. Technically, voltage harmonic distortion, current harmonic distortion, voltage and frequency fluctuations and voltage imbalances are the five decisive issues that judge the PQ performance of renewable energy systems. Healthy PQ, in terms of all the aforementioned phenomena, is assured by monitoring and benchmarking their corresponding indices, but performing the same, only at distributed generation (DG) bus level, is not sufficient since also the grid, as well as load bus PQ, plays an important role which makes the overall PQ assessment of renewable energy systems quite complex. This paper presents an analytic hierarchy process-based novel approach for evaluating and benchmarking the PQ performance of grid-integrated renewable energy systems. The procedure results in a single compound power quality index that is alone ample for benchmarking the overall PQ performance of a renewable energy system above the threshold level as well as for ranking among the PQ performances of individual DG systems differentiated by either renewable energy types or sittings in a distribution network. Such a compound index can ease the PQ performance evaluation and benchmarking process up to a maximum extent. Furthermore, it can be very helpful also for distribution system operators to monitor and penalize the DG owners for poorly operating from PQ aspects and motivate the same for adopting best option among different power quality improvement (PQI) technologies. The proposed approach is verified on a grid-integrated PV-based DG system in MATLAB/Simulink. Besides that, the effect of different PQI techniques, on PQ performance, is tested by the application of the proposed approach. At last, the validation of impending effects of high penetration of renewable energy on PQ of the system is also attempted by the proposed approach.

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Analysis of the Topologies of Power Filters Applied in Distributed Generation Units - Review

Cited by 19 publications

References 15 publications

Effect of Current Distortion and Unbalanced Loads on Semiconductors Reliability

Effect of Current Distortion and Unbalanced Loads on Semiconductors Reliability

Optimized Exploitation of Ancillary Services: Compensation of Reactive, Unbalance and Harmonic Currents Based on Particle Swarm Optimization

An analytic hierarchy process-based novel approach for benchmarking the power quality performance of grid-integrated renewable energy systems

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