Considerations for Accepting Large-Scale Distributed Energy Resources on Distribution Systems

2018 ◽  
Author(s):  
Keith Clapp ◽  
Cristin Reid ◽  
Neil Shepard ◽  
Nikala Wickstrom
Keyword(s):  
Distribution Systems ◽  
Large Scale ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Distributed Energy

scholarly journals Hierarchical, Grid-Aware, and Economically Optimal Coordination of Distributed Energy Resources in Realistic Distribution Systems

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6399
Author(s):  
Mads Almassalkhi ◽  
Sarnaduti Brahma ◽  
Nawaf Nazir ◽  
Hamid Ossareh ◽  
Pavan Racherla ◽  
...  
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Large Scale ◽  
Optimization Methods ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Solar Pv ◽  
Ancillary Service ◽  
Distributed Energy ◽  
Optimal Coordination

Renewable portfolio standards are targeting high levels of variable solar photovoltaics (PV) in electric distribution systems, which makes reliability more challenging to maintain for distribution system operators (DSOs). Distributed energy resources (DERs), including smart, connected appliances and PV inverters, represent responsive grid resources that can provide flexibility to support the DSO in actively managing their networks to facilitate reliability under extreme levels of solar PV. This flexibility can also be used to optimize system operations with respect to economic signals from wholesale energy and ancillary service markets. Here, we present a novel hierarchical scheme that actively controls behind-the-meter DERs to reliably manage each unbalanced distribution feeder and exploits the available flexibility to ensure reliable operation and economically optimizes the entire distribution network. Each layer of the scheme employs advanced optimization methods at different timescales to ensure that the system operates within both grid and device limits. The hierarchy is validated in a large-scale realistic simulation based on data from the industry. Simulation results show that coordination of flexibility improves both system reliability and economics, and enables greater penetration of solar PV. Discussion is also provided on the practical viability of the required communications and controls to implement the presented scheme within a large DSO.

Optimal Planning and Operation of Distribution Systems Considering Distributed Energy Resources and Automatic Reclosers

2018 ◽  
Vol 16 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Luis Fernando Grisales ◽  
Oscar Danilo Montoya ◽  
Alejandro Grajales ◽  
Ricardo Alberto Hincapie ◽  
Mauricio Granada
Keyword(s):  
Distribution Systems ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Optimal Planning ◽  
Distributed Energy ◽  
Planning And Operation

scholarly journals Adaptive Impedance-Based Fault Location Algorithm for Active Distribution Networks

2018 ◽  
Vol 8 (9) ◽  
pp. 1563 ◽  
Author(s):  
Cesar Orozco-Henao ◽  
Arturo Suman Bretas ◽  
Juan Marín-Quintero ◽  
Andres Herrera-Orozco ◽  
Juan Pulgarín-Rivera ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Fault Location ◽  
Real Life ◽  
Distribution Networks ◽  
Maximum Error ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Power Sources ◽  
Location Algorithm

Modern fault location methods are robust; however, they depend strongly on the availability of the measurements given by Distributed Energy Resources (DER). If the communication or synchronism of this information is lost, the fault location is not possible. This paper proposes an adaptive impedance-based fault location algorithm for active distribution systems. The proposal combines information provided by Intelligent Electronic Devices (IEDs) located at the substation, the knowledge of the network topology and parameters, as well as the distributed power sources, to estimate the fault location. Its adaptive feature is given by the use of a Distributed Energy Resources (DER) electrical model. This model is used to estimate the DER current contribution to the fault, in case the information provided by a local IED is not available. The method takes two types of DER technologies into account: Inverter non-interfaced DER (INIDER) and Inverter-interfaced DER (IIDER). The proposed method is validated on a modified IEEE 34-node test feeder, which was simulated with ATP/EMTP. The results obtained using the IEDs information, presented a maximum error of 0.8%. When this information is not available, the method’s performance decreases slightly, obtaining a maximum error of 1.1%. The proposed method showed better performance when compared with two state of the art methods, indicating potential use for real-life applications.

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