A Horizon Optimization Control Framework for the Coordinated Operation of Multiple Distributed Energy Resources in Low Voltage Distribution Networks

In recent years, the installation of residential Distributed Energy Resources (DER) that produce (mainly rooftop photovoltaics usually bundled with battery system) or consume (electric heat pumps, controllable loads, electric vehicles) electric power is continuously increasing in Low Voltage (LV) distribution networks. Several technical challenges may arise through the massive integration of DER, which have to be addressed by the distribution grid operator. However, DER can provide certain degree of flexibility to the operation of distribution grids, which is generally performed with temporal shifting of energy to be consumed or injected. This work advances a horizon optimization control framework which aims to efficiently schedule the LV network’s operation in day-ahead scale coordinating multiple DER. The main objectives of the proposed control is to ensure secure LV grid operation in the sense of admissible voltage bounds and rated loading conditions for the secondary transformer. The proposed methodology leans on a multi-period three-phase Optimal Power Flow (OPF) addressed as a nonlinear optimization problem. The resulting horizon control scheme is validated within an LV distribution network through multiple case scenarios with high microgeneration and electric vehicle integration providing admissible voltage limits and avoiding unnecessary active power curtailments.

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Identification of Distributed Energy Resources in Low Voltage Distribution Networks

10.1109/isgteurope52324.2021.9639971 ◽

2021 ◽

Author(s):

Andres F Moreno Jaramillo ◽

Javier Lopez-Lorente ◽

David Laverty ◽

Jesus Martinez-del-Rincon ◽

Aoife M. Foley

Keyword(s):

Low Voltage ◽

Distribution Networks ◽

Energy Resources ◽

Distributed Energy Resources ◽

Voltage Distribution ◽

Distributed Energy

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Modelling Framework and the Quantitative Analysis of Distributed Energy Resources in Future Distribution Networks

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2013-0007 ◽

2013 ◽

Vol 14 (5) ◽

pp. 421-431 ◽

Cited By ~ 6

Author(s):

Xue Han ◽

Claes Sandels ◽

Kun Zhu ◽

Lars Nordström

Keyword(s):

Quantitative Analysis ◽

Large Scale ◽

Large Body ◽

Network Models ◽

Distribution Networks ◽

Energy Resources ◽

Distributed Energy Resources ◽

Distribution Grid ◽

Distributed Energy ◽

Modelling Framework

Abstract There has been a large body of statements claiming that the large-scale deployment of Distributed Energy Resources (DERs) could eventually reshape the future distribution grid operation in numerous ways. Thus, it is necessary to introduce a framework to measure to what extent the power system operation will be changed by various parameters of DERs. This article proposed a modelling framework for an overview analysis on the correlation between DERs. Furthermore, to validate the framework, the authors described the reference models of different categories of DERs with their unique characteristics, comprising distributed generation, active demand and electric vehicles. Subsequently, quantitative analysis was made on the basis of the current and envisioned DER deployment scenarios proposed for Sweden. Simulations are performed in two typical distribution network models for four seasons. The simulation results show that in general the DER deployment brings in the possibilities to reduce the power losses and voltage drops by compensating power from the local generation and optimizing the local load profiles.

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Zoning Evaluation for Voltage Optimization in Distribution Networks with Distributed Energy Resources

Energies ◽

10.3390/en12030390 ◽

2019 ◽

Vol 12 (3) ◽

pp. 390 ◽

Cited By ~ 14

Author(s):

Anna Di Fazio ◽

Mario Russo ◽

Michele De Santis

Keyword(s):

Distribution System ◽

Low Voltage ◽

Linear Method ◽

Voltage Control ◽

Distribution Networks ◽

Energy Resources ◽

Distributed Energy Resources ◽

Distributed Energy ◽

Control Zone ◽

The Impact

This paper deals with the problem of the voltage profile optimization in a distribution system including distributed energy resources. Adopting a centralized approach, the voltage optimization is a non-linear programming problem with large number of variables requiring a continuous remote monitoring and data transmission from/to loads and distributed energy resources. In this study, a recently-proposed Jacobian-based linear method is used to model the steady-state operation of the distribution network and to divide the network into voltage control zones so as to reformulate the centralized optimization as a quadratic programming of reduced dimension. New clustering methods for the voltage control zone definition are proposed to consider the dependence of the nodal voltages on both active and reactive powers. Zoning methodologies are firstly tested on a 24-nodes low voltage network and, then, applied to the voltage optimization problem with the aim of analyzing the impact of the R/X ratios on the zone evaluation and on the voltage optimization solution.

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Study of Unwanted Emissions Generated by Distributed Energy Resources in Microgrids and their Influence over Narrow Band Power Line Communications

10.20944/preprints201609.0108.v1 ◽

2016 ◽

Author(s):

Noelia Uribe-Pérez ◽

Itziar Angulo ◽

Luis Hernández ◽

Txetxu Arzuaga ◽

David De La Vega ◽

...

Keyword(s):

Low Voltage ◽

Distribution Networks ◽

Power Line ◽

Energy Resources ◽

Distributed Energy Resources ◽

Distributed Energy ◽

Power Line Communications ◽

Battery Chargers ◽

Layer Analysis ◽

And Control

Distributed Energy Resources might have a severe influence on Power Line Communications, as they can generate interfering signals and high frequency emissions or supraharmonics that may cause loss of metering and control data. In this paper, the influence of various energy resources on Narrowband Power Line Communications is described and analyzed through several test measurements performed in a real microgrid. Accordingly, the paper describes the effects on smart metering communications through MAC layer analysis. Results show that the commutation frequency of inverters and the presence of battery chargers are remarkable sources of disturbance in low voltage distribution networks. In this sense, the results presented can contribute to efforts towards standardization and normative of emissions at higher frequencies higher, such as CENELEC EN 50160 and IEC/TS 62749.

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