On September 26, the Chinese state-owned tool Huanghe Hydropower Development (hereinafter referred to as Huanghe Hydropower) successfully connected the 2.2 GW PV plant to the power grid in Hainan Prefecture, northwestern China’s Qinghai province. This is the world’s first ultra – high voltage power line that delivers 100% renewable energy over long distances and also the world’s largest project for renewable energy with a short construction time.

This milestone project has reached the highest level in the industry in terms of device selection, design standards and technologies, making the record for the largest solar cell project in the world.
The grid-connected 2.2 GW PV plant is located in Qinghai Province at an average altitude of over 3,000 m. It is built in five phases and consists of 672 PV matrices with over 7 million PV modules. Three 330 kV booster stations were constructed and string converters were installed.

This milestone project has reached the highest level in the industry in terms of unit selection, design standards and technology, making the record for the largest PV project in a single location in the world.
– Huawei – the supplier with the largest project share – provides 1.6 GW inverters for this project. As the world’s first ultra – high voltage line to supply 100% renewable energy over long distances, the project requires high voltage inverters (HVRT) to ensure the safety and stability of the power grid. Because they are the first to meet GB / T 37408-2019 Technical Requirements for Solar Conductive Power Inverters, Huawei’s smart string inverters support short circuit ratio (SCR) as low as 1.5, without reducing the current during HVRT. It can also be connected to weak networks and offers malfunctioning capacity, which guarantees stable operation in different network environments.

In addition to advanced inverters, this project also benefits from several intelligent technologies, such as MBUS power carriers, Smart IV Curve Diagnosis 4.0, smart electro-luminescence (EL) detection, integrated application of trackers, bifacial PV modules and smart inverters and smart solar cell management. These significantly optimize O&M efficiency, facilitate accurate error forecasting and minimize the leveled cost of electricity (LCOE). Through joint innovation, Huanghe Hydropower and Huawei developed the industry-leading smart I-V diagnostic technology for global PV O&M, which has been widely adopted worldwide.
Huanghe Hydropower and Huawei together are leading the introduction of intelligent technologies for solar cells. This and several other joint projects have had a significant impact on the stable development and technological development of the global solar cell industry.