Improved Low Voltage Grid-Integration of Photovoltaic Systems in Germany

Stetz, Thomas A.; Marten, Frank; Braun, Martin

doi:10.1109/tste.2012.2198925

Cited by 413 publications

(191 citation statements)

References 5 publications

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“…This simplification of a three-phase network to a single line gives justifiable results for MV distribution networks but not for LV networks, where unbalanced phase loading and PV connections greatly affect the power quality constraints of the distribution network. In [8], PV penetration maximization was simulated on a 9-bus feeder system, in which the PV were attached at the end of the network. This evaluation disregarded the distributed nature of PV and has limited application.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Photo-Voltaic Hosting Capacity in Finnish Low Voltage Distribution Networks

2017

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Abstract:The ascending trend of photo-voltaic (PV) utilization on a domestic scale in Finland, calls for a technical aspects review of low voltage (LV) networks. This work investigates the technical factors that limit the PV hosting capacity, in realistic case networks, designed relative to different geographical areas of Finland. A Monte Carlo method based analysis was performed, in order to quantify the hosting capacity of the formulated networks, with balanced and unbalanced feeds, in PV systems and their limiting constraints were evaluated. Finally, the effectiveness of on-load tap changer (OLTC) in increasing the PV penetration, when employed in the LV system, was investigated.

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Section: Introductionmentioning

confidence: 99%

An Analysis of Photo-Voltaic Hosting Capacity in Finnish Low Voltage Distribution Networks

2017

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“…This method is investigated by publications [3,4,10,12]. Besides, active power reduction is also considered as a second option by Refs.…”

Section: Related Workmentioning

confidence: 99%

“…overvoltage and overloading. In recent studies, local autonomous power control (APC) and voltage droop mechanisms present their technical effectiveness in mitigating large voltage deviations [3,4]. By means of reactive power provisioning and active power curtailment, DGs can actively contribute to grid voltage regulation and increasing hosting capacity of distribution grids.…”

Section: Introductionmentioning

confidence: 99%

Optimal generation dispatch of distributed generators considering fair contribution to grid voltage control

Kaufmann

Töbermann

et al. 2016

Renewable Energy

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This paper investigates voltage control and generation dispatch of distributed generators (DGs) and how the operation of installed DGs can be optimized in distribution systems. A novel online generation dispatch algorithm for DGs is proposed in this work. This algorithm optimizes the contribution of individual DG units for grid voltage control in terms of costs. The technical advantages of the presented approach are evaluated by comparing the simulation results with various static and local dispatch control strategies, which can be considered currently as state-of-the-art according to technical standards and recent research. Simulation results indicate that the proposed method decreases the total cost for DG, improves the quality of voltage profiles and guarantees for each DG unit the opportunity to provide a fair amount of ancillary service to the grid. Additionally, through a performance test on a real time simulation platform it is concluded that the presented approach is also suitable for large grids in real time operation

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“…Therefore, voltage support solutions at the low levels of the grid are required to deal with such problems efficiently. The local solutions for the over-voltage problem that have been broadly discussed are static/dynamic active power curtailment and reactive power support by PV inverters [7][8][9][10][11]. Various coordinated and centralized solutions based on reactive power support from the PV inverters have also been proposed [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Distributed control scheme for residential battery energy storage units coupled with PV systems

2017

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A distributed control method for residential battery energy storage (BES) units coupled with photovoltaic (PV) systems is presented. The objective is to utilize customer owned BES units for solving the over-voltage issues caused by high PV penetration without significantly affecting the BES owners local objectives. 24 hour ahead active power set points of the BES unit are calculated by an optimization based scheduling algorithm. The objective function is locally decided and the optimization is performed at the local level.The BES units are charged from the excess energy from the PV systems mostly during the period the grid is under risk of over-voltage. If the set points that were calculated by the optimization, turn out not to be able to maintain the voltages within the statutory limits in real time operation, the active power set points are modified. Reactive power is also utilized when active power is not sufficient. The new set points are calculated by a central controller. The performance of the proposed method is validated in a simulation study. It is shown that the residential BES units can successfully be utilized for solving over-voltage issues without significantly affecting the primary needs of the BES owners. Keywords

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Improved Low Voltage Grid-Integration of Photovoltaic Systems in Germany

Cited by 413 publications

References 5 publications

An Analysis of Photo-Voltaic Hosting Capacity in Finnish Low Voltage Distribution Networks

An Analysis of Photo-Voltaic Hosting Capacity in Finnish Low Voltage Distribution Networks

Optimal generation dispatch of distributed generators considering fair contribution to grid voltage control

Distributed control scheme for residential battery energy storage units coupled with PV systems

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