China’s first high-altitude hydropower plus photovoltaic power storage microgrid project is put into operation
First high-altitude
On May 30, the first high-altitude hydropower + photovoltaic energy storage smart micro-grid was completed and put into operation in Yunnan, providing backup power for the power supply in the area, ensuring that the area can continue to operate in the event of a single main power supply failure.
The operation has enhanced the power supply quality of the high-altitude small hydropower supply area of China Southern Power Grid.
Integrated microgrid
Hydro-photovoltaic energy-storage integrated microgrid is a small power generation and distribution system that integrates hydroelectric units, photovoltaic power generation, energy storage devices, power quality control devices, load detection and microgrid power flow management systems.
It can run both off-grid or on-grid to realize intelligent switching between on-grid and off-grid.
The integrated hydropower photovoltaic energy storage project is located in a remote area of small hydropower supply at high altitude in Yunnan. It is restricted by national parks, nature reserves and ecological protection policies, and the construction of the power grid is difficult.
At present, the area is powered by a long line of 35 kV single power supply, the local electricity load is scattered, the density is low, the voltage problem is prominent, and the reliability of the power supply is low.
According to the local geographical environment and load characteristics, China Southern Power Grid Yunnan Diqing Power Supply Bureau has built a micro-grid integrating hydropower, photovoltaic energy storage in Sanba Township.
After the project is put into operation, it can ensure that when a single main power supply fails, the micro-grid management system can automatically switch to the smart micro-grid operation mode of integrating hydropower plus photovoltaic energy storage system according to the power supply and power consumption data to continue to supply power to the area and maintain steady state of local 10 kV grid.
The construction of the project lasted for two years. It has successively conquered key technologies such as the transformation of small hydropower dual-mode operation, the development of high-altitude grid-type power electronic equipment, decentralized energy management systems and power quality control, and has successfully carried out dozens of projects testing involving off-on grid and multi-level microgrid power supply operation.
