State Power Investment Corporation (SPIC) has completed a series of performance tests on its 50 MW grid-forming PV-storage system at the Dingyao PV-Storage Power Station in Hainan PV-storage integrated demonstration base.
Certified by the China Electric Power Research Institute (CEPRI), the nearly 3-month testing program included 52 tests covering weak-grid adaptability, fault defense, grid connection control, and steady-state operation. The tests included black-start procedures for a 330 kV transmission line and 35 kV off-grid 3-phase short-circuit fault testing.
SPIC said the project is the first comprehensive evaluation of a 50 MW PV-storage integrated synchronous generator in China. The tests replicated harmonic oscillation fault scenarios between 20 Hz and 80 Hz and enabled continuous regulation of grid short-circuit ratios from 20 down to 1.2.
According to the results, the system achieved zero-voltage energization of a 330 kV transmission line within 33 seconds, while maintaining steady-state voltage error within ±0.5% and frequency deviation within ±0.02 Hz. The company added that PV unit power utilization improved by more than 35%.
Recently, SPIC subsidiary SPIC Solar has completed its first large-scale sale of recycled PV module components, including 120 tons of silicon cells, aluminum frames, PV glass, and junction boxes (see China Solar PV News Snippets).
Energy developer Beijing Energy Group announced that one of its subsidiaries has secured approval for a 1.5 GW integrated wind-solar-thermal-storage project in Ulanqab, Inner Mongolia.
Located in Fengzhen City, the project involves a total investment of RMB 8.741 billion and includes 1.2 GW of wind capacity, 300 MW of PV capacity, and 3×220 kV booster stations and related infrastructure.
Beijing Energy Group recently started construction on a 600 MW desert PV project at the Kubuqi Desert base in Ordos, Inner Mongolia (see China Solar PV News Snippets).
China’s National Energy Administration (NEA) has released new quality supervision guidelines for large-scale energy storage power station construction projects.
The document applies to electrochemical and compressed-air energy storage projects with capacities of 100 MW or above in the power generation and grid-side sectors, excluding user-side storage projects.
The guidelines include general supervision requirements for foundation treatment, equipment installation, and power reception, as well as technology-specific supervision standards for electrochemical and compressed-air systems.
Hainan Province has released draft regulations on the construction and operation management of virtual power plants (VPPs) for public consultation.
The proposed framework allows VPP operators to aggregate distributed PV, distributed wind, user-side energy storage, EV charging facilities, HVAC systems, and adjustable industrial and commercial loads.
Under the draft rules, VPPs must have a controllable capacity of at least 1 MW and a continuous response capability of at least 1 hour.
The proposal also outlines technical support requirements, transaction unit classifications, and operational criteria for VPP participation in electricity market trading.