BEIJING, June 14 (Xinhua) -- The rise of distributed photovoltaic (PV) and new energy vehicles (NEVs) in recent years has pushed power distribution network to evolve from the traditional unidirectional radial model to a bidirectional interactive system, thus pressing for smart grid transformation to meet higher requirements on power grid operation and maintenance.
To adapt to such a trend, State Grid Linyi Power Supply Company, a power supply unit under State Grid Shandong Electric Power Company, has built and put into operation a village-level PV microgrid demonstration zone in Nantou New Village of Linyi City, east China's Shandong Province, facilitating the village's distributed PV development through an innovative solution to PV power's limited access to distribution networks.
Photo shows the village-level PV microgrid demonstration zone built by State Grid Linyi Power Supply Company in Nantou New Village of Linyi City, east China's Shandong Province.
Specifically, the company put centralized energy storage and Vehicle-to-Grid (V2G) electric vehicle charging points in place to achieve PV power utilization and electric load regulation with reduced impact on grid operations. In addition, by fully transforming the distribution area into a direct current system and using new types of regulating equipment, voltage off-limit and other issues are avoided, ensuring power quality for local residents.
"We constructed a visualization and control system for the substation energy network to further enhance microgrid monitoring. Through real-time monitoring to the minute, we make the state of the grid and the PV power generation devices visualized, predictable, and controllable, providing data support for grid optimization," said Sun Peng, the director of the company's operation and maintenance department.
The company will further tap into distribution network's digital transformation that caters to local conditions, so as to facilitate the efficient and sustainable operation of the power grid, serve new energy development and expedite the creation of a new power system, Sun noted. (Edited by Niu Huizhe with Xinhua Silk Road, niuhuizhe@xinhua.org)
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