The "Large-Scale PV Medium-Voltage DC Power Generation System for Desert-Gobi-Wasteland Bases" has been selected for the National Energy Administration's (NEA) First (Set) Major Technological Equipment Catalog, as confirmed in NEA's recently released Fourth Batch List of Major Energy Sector Technological Equipment. Desert-Gobi-wasteland regions offer abundant wind and solar resources ideal for large-scale development but present significant challenges including high power generation uncertainty, costly thermal power infrastructure, low proportions of synchronous generators, and weak local grids. Conventional AC collection systems face voltage instability, transient overvoltage, and wide-frequency oscillation issues, while solutions deploying thermal units, synchronous condensers, and grid-forming energy storage remain costly and fail to resolve fundamental AC synchronization stability limitations.
The medium-voltage DC photovoltaic generation system fundamentally eliminates frequency and phase synchronization requirements, addressing core AC power angle stability challenges. Its DC collection and transmission approach reduces cable usage and power conversion stages, with mass production promising substantially improved transmission efficiency and lower equipment costs – establishing an effective solution for large-scale renewable energy evacuation. To advance this frontier technology, Tsinghua University partnered with Huadian Xinjiang Power Generation, State Grid Qinghai Electric Power, Qinghai Zhongludian Energy Storage Technology, Guodian Nanjing Automation, Xinjiang Huadian Tianshan Power Generation, Beijing Power Equipment Group, TBEA Xinjiang New Energy, and PowerChina Northwest Engineering Corporation to pioneer 100MW-class PV medium-voltage DC technology. This collaboration has yielded the world's first 100kV/100MW clustered PV DC transformer and ultra-high-efficiency 100MW-capacity PV inverter.
Demonstration projects will deploy at Xinjiang Huadian's 6,100MW Tianshan North Piedmont Renewable Energy Base and Qinghai Haixi Golmud Luneng PV Base, establishing the world's first multi-level DC power system demonstration for desert-gobi-wasteland bases and the largest-capacity renewable DC collection project. These initiatives create a replicable model for efficient, economical renewable power transmission from such challenging terrains.
