Impact of grid reduction on modelling accuracy of line usage rates

Biener, Wolfgang; Senkpiel, Charlotte; Shammugam, Shivenes; Rosas, Klaus René Garcia; Linke, Manuela; Eibl, O.

doi:10.1088/1742-6596/977/1/012001

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…The usage within the EHV/HV level leads to neglected local grid restrictions within one cluster. In [82] the disregard of the intra-zonal grid topology was shown to be rather high. In contrast, [9] analyzed that the increasing behavior of grid expansion costs flattens out when exponentially increasing the number of clusters (up to 362) and concludes that the clustering captures crucial transmission routes well even when considering a smaller number of clusters.…”

Section: Discussion and Critical Appraisalmentioning

confidence: 99%

Integrated Techno-Economic Power System Planning of Transmission and Distribution Grids

et al. 2019

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The energy transition towards renewable and more distributed power production triggers the need for grid and storage expansion on all voltage levels. Today’s power system planning focuses on certain voltage levels or spatial resolutions. In this work we present an open source software tool eGo which is able to optimize grid and storage expansion throughout all voltage levels in a developed top-down approach. Operation and investment costs are minimized by applying a multi-period linear optimal power flow considering the grid infrastructure of the extra-high and high-voltage (380 to 110 kV) level. Hence, the common differentiation of transmission and distribution grid is partly dissolved, integrating the high-voltage level into the optimization problem. Consecutively, optimized curtailment and storage units are allocated in the medium voltage grid in order to lower medium and low voltage grid expansion needs, that are consequently determined. Here, heuristic optimization methods using the non-linear power flow were developed. Applying the tool on future scenarios we derived cost-efficient grid and storage expansion for all voltage levels in Germany. Due to the integrated approach, storage expansion and curtailment can significantly lower grid expansion costs in medium and low voltage grids and at the same time serve the optimal functioning of the overall system. Nevertheless, the cost-reducing effect for the whole of Germany was marginal. Instead, the consideration of realistic, spatially differentiated time series led to substantial overall savings.

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Section: Discussion and Critical Appraisalmentioning

confidence: 99%

Integrated Techno-Economic Power System Planning of Transmission and Distribution Grids

et al. 2019

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“…The usage within the EHV/HV level leads to neglected local grid restrictions within one cluster. In [81] the disregard of the intra-zonal grid topology was shown to be rather high. With 300 grid nodes this effect should be acceptably low.…”

Section: Discussion and Critical Appraisalmentioning

confidence: 99%

Integrated techno-economic power system planning of transmission and distribution grids

Müller¹,

Schachler²,

Scharf³

et al. 2019

Preprint

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The energy transition towards renewable and more decentral power production triggers the need for grid and storage expansion on all voltage levels. Today's power system planning focuses on certain voltage levels or spatial resolutions. In this work we present an open source software tool eGo which is able to optimize grid and storage expansion throughout all voltage levels in a developed top-down approach. System costs are minimized by applying a linear optimal power flow considering the grid infrastructure of the extra-high and high-voltage (380 to 110 kV) level. Hence, the common differentiation of transmission and distribution grid is partly dissolved, integrating the high-voltage level into the optimization problem. Consecutively, optimized curtailment and storage units are allocated in the medium voltage grid in order to lower medium and low voltage grid expansion needs, that are consequently determined. Here, heuristic optimization methods using the non-linear power flow were developed. Applying the tool on future scenarios we derived cost-efficient grid and storage expansion for all voltage levels in Germany. Due to the integrated approach storage expansion and curtailment can significantly lower grid expansion costs in medium and low voltage grids and at the same time serve the optimal functioning of the overall system. Nevertheless, the cost-reducing effect for the whole of Germany was marginal. Instead, the consideration of realistic, spatially differentiated time series lead to substantial overall savings.

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“…The structure of the model enables calculations in different regional resolutions by clustering NUTS3-regions into bigger regions. A developed grid clustering algorithm [41] is applied to reduce the grid by the regional clustering of the NUTS3 regions.…”

Section: Power System Model Entigismentioning

confidence: 99%

Systemic Evaluation of the Effects of Regional Self-Supply Targets on the German Electricity System Using Consistent Scenarios and System Optimization

Senkpiel

Hauser

2020

Energies

Self Cite

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This paper analyses the effects of regional renewable electricity self-sufficiency targets on the power system in Germany. For this purpose, an interdisciplinary approach from social sciences and energy system modelling was chosen, which allows considering qualitative factors such as public acceptance or political stability. Following the concept of context scenarios, consistent raw scenarios are generated by a cross-impact balance analysis (CIB), and the scenarios are quantified by the unit commitment and expansion cost minimisation model ENTIGRIS considering power plants, storages, and the electricity grid. This approach enables an understanding of the system framework conditions and their relationships and allows the combination of qualitative and quantitative scenario descriptors. The most important factors for setting regional self-sufficiency targets were identified through interviews. The main system effects identified are: The regional distribution of generation capacities is strongly influenced by a more demand-oriented installation of generation capacities. This leads to less grid reinforcement, but higher rates of curtailment. In all scenarios, higher utilization of the PV roof potential instead of ground mounted could be observed. The total system costs are increasing only slightly with regional self-supply targets. In general, it was found that the influence of regional self-sufficiency targets is less pronounced in scenarios that already achieve high national RES shares than in scenarios that achieve lower shares, since technology, storage and grid expansion measures are necessary anyway to achieve high RES shares. Overall, the effects here are rather small and the regional objective is not associated with major disadvantages for the system. In a future characterised by stagnation, the system can benefit from regional targeting, as higher renewable shares and lower costs can result. The main conclusion therefore is that regional target setting seem to be beneficial for the overall power system, in terms of system cost, national RE share, acceptance and CO2-emissions.

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Impact of grid reduction on modelling accuracy of line usage rates

Cited by 3 publications

References 2 publications

Integrated Techno-Economic Power System Planning of Transmission and Distribution Grids

Integrated Techno-Economic Power System Planning of Transmission and Distribution Grids

Integrated techno-economic power system planning of transmission and distribution grids

Systemic Evaluation of the Effects of Regional Self-Supply Targets on the German Electricity System Using Consistent Scenarios and System Optimization

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