Grid-connected PV plants. Power quality and technical requirements

Gonzalez, Pedro Paredes; Romero, E.; Minambres, V.; Guerrero, Miguel Ángel López; González, E.

doi:10.1109/pq.2014.6866804

Cited by 22 publications

(7 citation statements)

References 10 publications

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“…Sunt de asemenea investigate și alte aspecte privind calitatea energiei electrice în sistemul de corecție a factorului de putere adoptat. Astfel, sistemul de compensare a puterii reactive capacitive pe timpul nopții, datorată, în principal, lungimii cablului de medie tensiune care racordează centrala la stația de conexiune (de aproximativ 10 km) era asigurată de către invertoarele ce aparțin centralei (prin reglarea automată a unghiului de comutație a invertoarelor astfel încât acestea să genereze un regim inductiv) [1][2][3][4][5][6][7]. Această metodă de compensare a fost înlocuită de utilizarea unor elemente pasive (bobine trifazate de compensare) conectate exclusiv pe timpul nopții pe partea de joasă tensiune a transformatoarelor.…”

Section: Introducereunclassified

Analysis of Reactive Power Compensation With Passive Circuit Elements for Grid-Connected Photovoltaic Plants

GROȘANU¹,

Cazacu²,

Petrescu³

2023

APME/EMMD

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The work represents the optimized solution for the selection of the reactive power compensation system for an on-grid photovoltaic plant with an installed power of 8 MW. The reactive power, of significant values, is mainly due to the length of the medium voltage cable that connects the photovoltaic plant to the connection station located at a distance of 10 km. Thus, a critical analysis is presented, with a technical-economic foundation of power factor correction solutions. The operation of the power plant's correction system was monitored both during the day (while the panels were lit) and at night (without the panels lit). Special attention was paid to the influence of the energy quality parameters regarding the additional consumptions of the plant in the two situations. It was also considered to find an optimal solution for the maximum safety of the equipment in order to avoid reaching the critical operating temperature of the transformers in the plant. In addition, a detailed economic study was also carried out to justify the choice of the adopted solution (compensation with passive circuit elements - reactance coils) over the classic ones (adjusting the ignition angle of the inverters in the plant so that they work in inductive mode ).

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Section: Introducereunclassified

Analysis of Reactive Power Compensation With Passive Circuit Elements for Grid-Connected Photovoltaic Plants

GROȘANU¹,

Cazacu²,

Petrescu³

2023

APME/EMMD

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“…Schema generală a centralei fotovoltaice în stare normală de funcționare este indicată în Figura 1. Topologia acesteia este una tipică centralelor electrice fotovoltaice conectate la rețeaua generală de [1][2][3][4][5][6][7][8]. Aceasta are o putere instalată de cca 9.5 MWp şi produce (în regim normal de funcționare) o putere maximă de 8.5 MW.…”

Section: Introducereunclassified

Analysis of Electricity Quality and Efficiency for a Photovoltaic Power Plant With 8 Mw of Power

Groşanu¹,

Cazacu²,

Petrescu³

2021

APME/EMMD

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The paper presents a study on the quality and energy efficiency of operation for a photovoltaic plant with a power of 8 MW connected to the national energy network. The various operating regimes of the main network elements within the investigated photovoltaic plant are examined both qualitatively and quantitatively. Thus, for power transformers and medium voltage cables in the plant, the losses due to the particular regimes imposed by the load are calculated (often deforming and unbalanced regimes). In this way, opportunities are identified to increase the energy efficiency of the entire system, but also methods to improve the quality of energy delivered at the point of its connection to the local energy system.

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“…The schematic diagram of the main photovoltaic power plant component in normal (daylight) operation state is indicated in Figure 1. This reveals a typical schematic of a grid-connected solar power plant [1][2][3][4][5][6][7][8]. The here examined solar park has a power installed in photovoltaic panels of 8.48 MWp, comprising the main component: The measurements were performed on the low voltage (LV) side of the electrical transformers from 16.07.2021 to 27.07.2021, where the most important power quality parameters were visualized and critically analyzed.…”

Section: Introductionmentioning

confidence: 99%

Reactive Power Management in a Grid-Connected Photovoltaic Power Station: A Case-Study

Cazacu

Groşanu

Petrescu

2021

The Scientific Bulletin of Electrical Engineering Faculty

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The paper presents an applicative study on the power quality and energy efficiency operation for a photovoltaic power station with an installed capacity of 8.5 MW. The various operating regimes of the main network elements within the investigated photovoltaic plant are qualitatively and quantitatively. The reactive power flow in the plant that is permanently connected to the grid is especially examined. Thus, the losses within the power transformers and medium voltage cables in the plant are calculated due to the imposed by the load (often deforming and unbalanced regimes). In this manner, opportunities are identified to increase the energy efficiency of the entire system but also methods to improve the quality of energy delivered at the point of its connection to the local energy system.

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Grid-connected PV plants. Power quality and technical requirements

Cited by 22 publications

References 10 publications

Analysis of Reactive Power Compensation With Passive Circuit Elements for Grid-Connected Photovoltaic Plants

Analysis of Reactive Power Compensation With Passive Circuit Elements for Grid-Connected Photovoltaic Plants

Analysis of Electricity Quality and Efficiency for a Photovoltaic Power Plant With 8 Mw of Power

Reactive Power Management in a Grid-Connected Photovoltaic Power Station: A Case-Study

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