BEIJING, Nov. 30 (Xinhua) -- Zhenjiang, east China's Jiangsu Province, has been a pioneer in developing renewable energy in the city. In this case, the absorption of renewable energy is a key issue, which may bring challenges to the traditional power grid.
"With higher proportion of distributed photovoltaic (PV) integrated into the power network, it becomes more complicated with a source and two-way transmission, which may pose great challenges to power quality and safety," said a staff of State Grid Zhenjiang Power Supply Company.
To address the concern, the company has built up new power supply system with innovations in technologies and service mode, thus helping the rural areas to develop in a greener way. It has strengthened the management of power grid to assure operation and service and redistributed PV resources to facilitate more complete absorption.
For example, the company has equipped Huilong Village with two 50-kilowatt-hour distributed energy storage devices, which could improve absorption by storing power in real time and secure the safety of the power grid. It is monitored that the devices has improved the absorption rate by 20 percent.
Yao Wenlong, head of the village, said that the application of rooftop PV could reduce emission of greenhouse gas by 600 tonnes each year and bring a total revenue of 600,000 yuan (about 84141 U.S. dollars). Promoting renewable energy has become a major way to help green development and prosperity of villages. (Edited by Li Shimeng with Xinhua Silk Road, lishimeng@xinhua.org)
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