Three-alternating Profile
U160BLT · 160 kN
A 160 kN three-alternating disc with 155 mm spacing, 330 mm diameter and 550 mm creepage, weighing 8.9 kg. The longest creepage…
Creepage 550 mm
Ø 330 mm
Coupling 20
Project Record
±800 kV Longdong To Shandong UHVDC Project
Jinhao developed an extra high mechanical strength insulator of 550 kN to meet the specific needs of SGCC for this project.
Project Background
The Longdong-Shandong project runs from the Qingyang Converter Station in Qingyang City, Gansu Province, across Gansu, Shanxi, Shaanxi, Hebei and Shandong, to the Dongping Converter Station in Taian City, Shandong Province. The transmission distance is 915 kilometres and total investment 20.2 billion yuan.
The Challenge
This is the first external delivery project for China's first large-scale integrated wind, solar, thermal and storage energy base, and the first UHVDC project to achieve full-capacity commissioning in a single phase. It is also the first demonstration project applying the standardised dual 800 configuration, meaning ±800 kV rated voltage and 8 million kW rated capacity.
What We Supplied
Jinhao developed an extra high mechanical strength insulator of 550 kN to meet the specific needs of SGCC for this project.
Outcome
Result
The project received national approval in February 2023 and began construction in June the same year. It includes 14.5 million kilowatts of supporting power sources, of which 10.5 million kilowatts are renewable, and for the first time incorporates 1.05 million kilowatts of energy storage at the sending end base to allow bundled transmission of wind, solar and thermal power.
Customer Benefit
The line can deliver 36 billion kilowatt-hours to Shandong annually, raising regional power import capacity to 38 million kilowatts with new energy accounting for over 50 percent, and supports reliable transmission of more than 10 million kilowatts of new energy capacity from the Gansu base.
More On UHV And EHV Transmission LinesProducts Involved
Models In This Class Of Work
Aerodynamic Profile
U160BD · 160 kN
A 160 kN aerodynamic disc with 155 mm spacing, 420 mm diameter and 380 mm creepage, weighing 8.5 kg. The widest disc in our range…
Creepage 380 mm
Ø 420 mm
Coupling 20
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Jinhao developed an extra high mechanical strength insulator of 420 kN to meet the specific needs of SGCC for this project.
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Mr Andrey from Pradex visited the Jinhao plant in Linyi for a technical review covering the glass shell forming line, the toughening and thermal shock stations, the cementing line and the finished goods inspection area.
Answers
Project Supply Questions
What did Jinhao supply to the ±800 kV Longdong To Shandong UHVDC Project?
Jinhao developed an extra high mechanical strength insulator of 550 kN to meet the specific needs of SGCC for this project.
Can you develop a mechanical rating outside your standard range?
Yes. Our listed range runs to 160 kN, and we have developed 420 kN and 550 kN discs for specific ultra high voltage projects. Custom loads are available for special projects.
What documentation is supplied on a project of this size?
Technical documents, test reports and certification support for grid acceptance, plus the export document set covering CO, PI, PL and CI.
Working On Something Similar
Send the route data and specification. Projects at this scale start with a selection review, not a price list.