Reactive Power Control for Distributed Generation Power Plants to Comply With Voltage Limits During Grid Faults

Camacho, Antonio; Castilla, Miguel; Miret, Jaume; Guzmán, Ramón; Borrell, Ángel

doi:10.1109/tpel.2014.2301463

Cited by 173 publications

(118 citation statements)

References 43 publications

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“…Focusing on the effects of voltage regulation in LV networks, other results are presented in [32]. Furthermore, the management of the local generators reactive power at positive and negative sequences allows, respectively, to control voltage amplitude and to balance phase voltages [33,34]. In [35], a parametrical analysis of voltage regulation through DGs reactive power injections has been carried out as a function of the network R/X ratio to maximize its effectiveness.…”

Section: Voltage Support Strategiesmentioning

confidence: 99%

Impact of Distributed Generation Grid Code Requirements on Islanding Detection in LV Networks

Bignucolo

Cerretti²,

Coppo

et al. 2017

Energies

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Abstract:The recent growing diffusion of dispersed generation in low voltage (LV) distribution networks is entailing new rules to make local generators participate in network stability. Consequently, national and international grid codes, which define the connection rules for stability and safety of electrical power systems, have been updated requiring distributed generators and electrical storage systems to supply stabilizing contributions. In this scenario, specific attention to the uncontrolled islanding issue has to be addressed since currently required anti-islanding protection systems, based on relays locally measuring voltage and frequency, could no longer be suitable. In this paper, the effects on the interface protection performance of different LV generators' stabilizing functions are analysed. The study takes into account existing requirements, such as the generators' active power regulation (according to the measured frequency) and reactive power regulation (depending on the local measured voltage). In addition, the paper focuses on other stabilizing features under discussion, derived from the medium voltage (MV) distribution network grid codes or proposed in the literature, such as fast voltage support (FVS) and inertia emulation. Stabilizing functions have been reproduced in the DIgSILENT PowerFactory 2016 software environment, making use of its native programming language. Later, they are tested both alone and together, aiming to obtain a comprehensive analysis on their impact on the anti-islanding protection effectiveness. Through dynamic simulations in several network scenarios the paper demonstrates the detrimental impact that such stabilizing regulations may have on loss-of-main protection effectiveness, leading to an increased risk of unintentional islanding.

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Section: Voltage Support Strategiesmentioning

confidence: 99%

Impact of Distributed Generation Grid Code Requirements on Islanding Detection in LV Networks

Bignucolo

Cerretti²,

Coppo

et al. 2017

Energies

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“…The third is a type III voltage sag with no negative sequence voltage and, thus, with the same amplitude reduction in all the phase voltages. Further details on the classification of the voltage sags as type I, II and III are found in [40]. Using the classification in [32], the three voltage sags are denoted as types C, D and A, respectively.…”

Section: Simulation Setupmentioning

confidence: 99%

Performance Comparison of Grid-Faulty Control Schemes for Inverter-Based Industrial Microgrids

Camacho

Castilla

Canziani³

et al. 2017

Energies

Self Cite

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Several control schemes specifically designed to operate inverter-based industrial microgrids during voltage sags have been recently proposed. This paper first classifies these control schemes in three categories and then performs a comparative analysis of them. Representative control schemes of each category are selected, described and used to identify the main features and performance of the considered category. The comparison is based on the evaluation of several indexes, which measure the power quality of the installation and utility grid during voltage sags, including voltage regulation, reactive current injection and transient response. The paper includes selected simulation results from a 500 kVA industrial microgrid to validate the expected features of the considered control schemes. Finally, in view of the obtained results, the paper proposes an alternative solution to cope with voltage sags, which includes the use of a static compensator in parallel with the microgrid. The novelty of this proposal is the suitable selection of the control schemes for both the microgrid and the static compensator. The superior performance of the proposal is confirmed by the analysis of the quality indexes. Its practical limitations are also revealed, showing that the topic studied in this paper is still open for further research.

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“…The grid-connected wind power system is used to transfer power to the grid; however, the grid voltage is balanced or unbalanced. Moreover, an unbalanced voltage on the power system causes double-frequency power oscillation at the output power, as reflected by the ripple in the DC bus voltage [13], [14]. In certain cases, these oscillations lead to instability if the DC bus voltage surpasses the most extreme limit.…”

Section: Introductionmentioning

confidence: 99%

Power Management of Open Winding PM Synchronous Generator for Unbalanced Voltage Conditions

EL-Bardawil¹,

Moussa²

2016

Journal of Power Electronics

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Wind energy is currently the fastest-growing electricity source worldwide. The cost efficiency of wind generators must be high because these generators have to compete with other energy sources. In this paper, a system that utilizes an open-winding permanent-magnet synchronous generator is studied for wind-energy generation. The proposed system controls generated power through an auxiliary voltage source inverter. The VA rating of the auxiliary inverter is only a fraction of the system-rated power. An adjusted control system, which consists of two main parts, is implemented to control the generator power and the grid-side converter. This paper introduces a study on the effect of unbalanced voltages for the wind-generation system. The proposed system is designed and simulated using MATLAB/Simulink software. Theoretical and experimental results verify the validity of the proposed system to achieve the power management requirements for balanced and unbalanced voltage conditions of the grid.

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Reactive Power Control for Distributed Generation Power Plants to Comply With Voltage Limits During Grid Faults

Abstract: Abstract-Grid

Cited by 173 publications

References 43 publications

Impact of Distributed Generation Grid Code Requirements on Islanding Detection in LV Networks

Impact of Distributed Generation Grid Code Requirements on Islanding Detection in LV Networks

Performance Comparison of Grid-Faulty Control Schemes for Inverter-Based Industrial Microgrids

Power Management of Open Winding PM Synchronous Generator for Unbalanced Voltage Conditions

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