Chinese state-owned utility Huanghe Hydropower Development (hereafter “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 single-site renewable energy project with the shortest construction time.
Located at an average altitude of over 3000 m
The grid-connected 2.2 GW PV plant is located in Qinghai Province at an average altitude of over 3000 m. Built in five phases, it consists of 672 PV arrays with over 7 million PV modules. Three 330 kV booster stations were constructed and string inverters were installed.
Ultra-high voltage power line delivers 100% renewable energy
Huawei — the supplier with the largest project share — provides 1.6 GW inverters for this project, according to the company. As the world's first ultra-high voltage power line that delivers 100% renewable energy over long distances, the project requires inverters with high voltage ride-through (HVRT) capability to ensure the safety and stability of the power grid.
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Several cutting-edge technologies
Being the first to pass the GB/T 37408-2019 technical requirements for photovoltaic grid-connected inverter, Huawei's smart string inverter supports short circuit ratio (SCR) as low as 1.5, without power derating during HVRT. It can also connect to weak grids and offers fault ride-through capability, guaranteeing stable operation in various grid environments.
Huawei
Besides cutting-edge inverters, this project also draws on the benefits of several intelligent technologies, such as MBUS power carriers, Smart I-V Curve Diagnosis 4.0, smart electro-luminescence (EL) detection, integrated application of trackers, bifacial PV modules, and smart inverters, and smart PV plant management, Huawei announced in a press release.
Joint innovation of Huanghe Hydropower and Huawei
According to Huawei these significantly optimize O&M efficiency, facilitate accurate fault prediction, and minimize the levelized cost of electricity (LCOE). Through joint innovation, Huanghe Hydropower and Huawei developed the smart I-V diagnosis technology for global PV O&M, which has been widely adopted worldwide. (hcn)
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