Impact of photovoltaic ingress on the performance and stability of low voltage Grid-Connected Microgrids

Abstract

• Framework for PV Impact – A new framework using steady-state and time-series analyses to assess high PV penetration on LVGCM. • Novel Ancillary Service Method – Customized per-bus Volt/VAR control rules proposed for rooftop PVs to support grid stability. • Advanced Simulation Techniques – Grid utilization under diverse PV scenarios evaluated using advanced modeling and simulations. • Innovation in Voltage Control – Transformative Volt/VAR control improves voltage profiles and grid resilience with rising PV integration. • Enhanced Performance for Sustainability –The method promotes reliable and sustainable PV-grid integration. The surge in the deployment of photovoltaic syste (PV) can be attributed to factors such as the increasing global demand for energy, the shift to cleaner energy sources, and the desire to manage electricity costs and reduce energy dependence. Rooftop photovoltaic systems, especially, have gained prominence because of their versatility and affordability, allowing consumers to generate electricity. However, the widespread adoption of PV systems necessitates a thorough evaluation of their impact on low-voltage Grid-Connected Microgrids (LVGCM), particularly the low-voltage network. In this paper, the impact of high PV penetration on the existing distribution network is evaluated using the proposed technique based on steady-state and time-series power flow analyses. It is crucial to understand solar variability and its effects on grid operations. Additionally, a novel approach is proposed to offer ancillary services support through rooftop PVs by customizing Volt/VAR control rules on a per-bus basis, offering a transformative approach to grid management, fortifying voltage profiles, and bolstering stability amid escalating PV generation. Advanced modeling and simulation techniques applied on the existing low voltage network, will further enable stakeholders to assess grid utilization under diverse scenarios, facilitating effective strategies to optimize PV utilization and alleviate grid congestion. The results obtained from this study outperform the previous analysis done in this area which shows a promising verdict as a commitment to navigate towards a sustainable energy future, integrating PV generation seamlessly into distribution grids while ensuring reliability and resilience through ongoing research and innovation in grid technologies.

Topics & Concepts