Work

Transient and Steady-State Evaluation of Distributed Generation in Medium-Voltage Distribution Networks

Year: 2024

Type: article

Abstract: As power generation systems of increasingly higher capacities interconnect with distribution networks, there arises a pressing need for thorough analysis regarding their integration and the consequential impacts on medium voltage lines. This study undertakes a comprehensive evaluation encompassing the steady-state and transient behaviors, culminating in a holistic assessment of a real-world biogas generation system integrated into a medium voltage network. Employing a real feeder as a case study, both normal operating conditions and maximum generation scenarios are scrutinized. The methodology delves into various aspects including voltage profiles, chargeability, power losses, short-circuit currents, and protection coordination under steady-state conditions. Furthermore, a transient analysis is conducted to delineate the system's response during fault conditions. This systematic approach yields a deep understanding of the system's behavior across diverse operational scenarios, thereby enriching the field with practical insights. The advantages of adding a generation system to a distribution network are explained from various technical viewpoints. In a peak demand scenario coupled with a 1.72 MW generation capacity, the phase current registers a notable 35.78% decrease. Concurrently, the minimum peak demand voltage exhibits an increase from 12.62 kV to 12.83 kV (compared to a nominal voltage of 12.7 kV). Moreover, the generation system's contribution to the short-circuit current remains minimal, staying below 4% even in the most adverse conditions. On the other hand, our findings reveal that the voltage values are outside the upper part of the CBEMA quality curve for a short period during a single-phase fault with generation, which could cause damage to the electronic equipment connected to the grid. However, the probability of encountering a single-phase grounding fault with a resistance of 0 Ohm remains minimal.

Source: Energies

DOI: 10.3390/en17225783

Authors: Daniel Guillén-López, Xavier Serrano-Guerrero, Mateo Astudillo-Flores, Jean-Michel Clairand

Institutions: Politecnica Salesiana University, University of Cuenca, Universidad de Las Américas

Language: English

Topic: Optimal Power Flow Distribution

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,955