Overview
On November 6, CGN’s “Zero-Carbon” solar-thermal-storage demonstration project in Ngari, Tibet, connected its 50 MW concentrated solar power (CSP) unit to the grid for the first time, becoming the world’s highest-altitude grid-connected CSP plant. Located in Gar County, Ngari Prefecture, at an average altitude of 4,300 meters, the project totals 150 MW—a 100 MW PV station already fully connected and a 50 MW CSP unit that broke ground in July 2024.
The CSP plant adopts the world’s first “PV + molten-salt electric heater + asynchronous interconnection storage” route, with the world’s largest CSP molten-salt electric heater (205 MW), a 14-hour molten-salt thermal storage system and two 25 MW turbine generators. The newly connected unit is No.1; No.2 will follow within the year.
Background & Interpretation
1. Industry and Policy Context
Tibet is a clean-energy base, yet its extreme altitude, weak grid and long-day/short-night environment pose unique supply challenges. CSP offers both peak-shaving and long-duration storage, providing long-cycle regulation and rotational inertia—an important pillar of the new power system. The project is Tibet’s first approved “PV + CSP” integration and a key provincial supply-security project.
2. Core Drivers and Underlying Mechanisms
The plant runs a “thermal-storage cogeneration” mode: by day, PV electricity is converted via the molten-salt heater into heat stored in high-temperature salt; through a steam-generation system it delivers round-the-clock power and district heating. It operates in both grid-connected and islanded modes—normally supporting the grid, but quickly switching to an independent source under special conditions to secure core regional loads, a novel solution for plateau energy security.
3. Market Structure and Industry Chain Impact
At full operation the project is expected to generate about 270 GWh annually, cutting CO2 by ~168,200 tons and saving ~74,200 tons of standard coal. Construction created over 500 local jobs and ~RMB 20 million in income, turning herders into industrial workers. It offers a replicable template for high-altitude CSP and could scale up green-energy security in border regions.
Implications & Outlook
Near-to-mid term, “CSP + PV” integration will become a key route for high-renewable bases, especially where grids are weak. Watch: the molten-salt cost curve, mechanisms valuing CSP’s regulation services, and high-altitude O&M reliability.
Takeaways for Industry Participants
Equipment firms can develop altitude-specific CSP and molten-salt systems; developers should value the supply-security of multi-energy complementarity; local governments can embed such projects in frontier energy-security and rural-revitalization frameworks; financiers can explore green-credit and carbon-revenue-linked models.
This column compiles industry information and shares technical perspectives; it does not constitute investment advice.