In the heart of China’s mountainous regions, a groundbreaking study is set to revolutionize the way we think about solar power integration. Led by Youzhuo Zheng from the Electric Power Research Institute of Guizhou Power Grid Co., Ltd., this research tackles a critical challenge: how to effectively assess and enhance the hosting capacity of distributed photovoltaic (PV) systems in mountainous distribution networks.
Mountainous areas present unique challenges for energy distribution. The scattered population and vast transmission radii make it difficult to maintain power quality and stability, especially with the increasing penetration of distributed PV systems. Traditional methods often overlook the uncertainties in PV output, leading to potential overestimations and subsequent power quality issues. Zheng’s study, published in the journal Energies, addresses these gaps with a novel robust assessment method.
At the core of this method is the introduction of energy storage-enhanced soft open points (E-SOP). These intelligent devices can flexibly adjust power flow, connecting previously isolated supply zones and allowing for bidirectional power exchange. “The E-SOP’s temporal and spatial trend flexibility is a game-changer,” Zheng explains. “It can alleviate low voltage issues at the end of distribution networks, improving the overall hosting capacity for distributed PV.”
The study constructs a two-layer robust assessment model that considers the uncertainties in PV output and load demand. This model is then transformed into a solvable mixed-integer linear programming model, ensuring practical applicability. The effectiveness of this method was validated using the IEEE 33-node distribution network system, demonstrating improved power quality and increased hosting capacity.
The implications of this research are vast. For energy companies operating in mountainous regions, this method offers a way to integrate more distributed PV systems without compromising power quality. It’s a significant step towards achieving the “dual-carbon” goal—reducing carbon emissions and increasing carbon absorption—while meeting the growing demand for electricity.
Moreover, the use of E-SOP and the robust assessment model can enhance the resilience of distribution networks, making them more adaptable to the intermittent nature of renewable energy sources. This could pave the way for more widespread adoption of distributed PV systems, not just in mountainous areas, but in various terrains and climates.
As the energy sector continues to evolve, research like Zheng’s will play a pivotal role in shaping the future of power distribution. By addressing the unique challenges of mountainous regions, this study provides a blueprint for integrating renewable energy sources more effectively and sustainably. The findings, published in Energies, offer a glimpse into a future where power distribution is more flexible, resilient, and environmentally friendly.
