2025

±800kV UHV DC Transmission Project of Gansu-Zhejiang

The world's first UHV DC transmission project adopting flexible DC transmission technology at both sending and receiving ends

2020

Power Grid Interconnection Project of Ngari and Central Tibet

The world's highest-altitude power grid project, with an average altitude of 4,572 meters and a maximum altitude of 5,500 meters.

2018

Flexible DC Grid Test and Demonstration Project of Zhangbei

The world's first flexible DC grid project

2017

±1100kV HVDC Transmission Demonstration Project of Changji-Guquan

The world's first ±1100kV UHV DC transmission project

2009

±800kV UHV DC Transmission Project of Xiangjiaba-Shanghai

One of the world's first ±800kV UHV DC transmission projects

2009

±660kV HVDC Transmission Demonstration Project of Ningdong-Shandong

The world's first ±660kV HVDC transmission project

2008

1000kV UHV AC Test and Demonstration Project of Jindongnan-Nanyang-Jingmen

China's first 1000kV transmission project

2008

±800kV UHV DC Transmission Demonstration Project of Yunnan-Guangdong

One of the world's first ±800kV UHV DC transmission projects

2004

Power Transmission and Transformation Demonstration Project of Guanting to East of Lanzhou

China's first 750kV transmission project

Since 1996

Power Transmission System Project of Three Gorges

The world's largest and most technically complex AC/DC hybrid transmission system

1985

HVDC Transmission Project of Gezhouba to Nanqiao

China's first ±500kV HVDC transmission project

1979

Power Transmission and Transformation Project of Pingdingshan (Henan) to Wuchang (Hubei)

China's first 500kV EHV power transmission and transformation project

2025

Saudi Arabia

In 2025, became the FIRST Chinese insulator supplier for Saudi Arabia's DC projects;

2024

Vietnam

In 2024, supplied products for Vietnam's 500kV three-circuit transmission line projects, including the Quang Trach-Qiong Luu section, Qiong Luu-Thanh Hoa section, and Nam Dinh No.1 Thermal Power Plant-Phu No section. The project has made outstanding contributions to safeguarding Vietnam's national energy security, marking a milestone significance, and meanwhile won the Excellent Supplier Award issued by the Vietnamese Government and Vietnam National Power Corporation (EVN);

2023

Saudi Arabia

In 2023, the FIRST Chinese insulator supplier certified by the Saudi Arabian market;

2022

Bangladesh

Started supplying products for Bangladesh's G2G (Government-to-Government) project in 2022, which is a key cooperation project under the "Belt and Road" Initiative between China and Bangladesh;

2020

Philippines

In 2020, supplied products for the Philippines' first DC project - the ±350kV DC transmission line project from Visayas to Mindanao;

2019

Bangladesh

In 2019, became the FIRST Chinese insulator supplier certified for the 230kV~400kV voltage levels in Bangladesh, achieving large-scale supply in the same year;

2017

Philippines

In 2017, became the FIRST Chinese insulator supplier for the Philippines' 500kV AC projects, supplying products for the 500kV transmission line project from Hermosa to San Jose;

2015

Ecuador

In 2015, supplied products for Ecuador's first 500kV EHV (Extra-High Voltage) power transmission and transformation project, becoming the FIRST Chinese insulator supplier qualified to supply for Ecuador's 500kV projects;

2012

Pakistan

In 2012, supplied products for Pakistan's first 500kV line - ADB53 Project and Dera Ghazi Khan Line Project, becoming the FIRST Chinese insulator supplier qualified to supply for Pakistan's 500kV projects;

2011

Sri Lanka

In 2011, became the FIRST Chinese insulator supplier certified by the Sri Lankan market;

2010

Chalkenderbang

In 2010, supplied 765kV AC composite insulators for the project from Jharkhand to West Bengal, India;

2009

India

In 2009, participated in the supply of products for India's ±800kV HVDC interconnection line project linking Northeast-North/West regions, becoming the FIRST Chinese insulator supplier qualified to supply for India's ±800kV projects;

2008

Myanmar

In 2008, supplied products for the Yeywa Hydropower Station transmission line project in Myanmar. After completion, the project alleviated 50% of Myanmar's power load, marking a historic significance;

2006

Pakistan

In 2006, became the FIRST Chinese insulator supplier accredited by the Pakistani market;

2005

South Korea

In 2005, became the FIRST Chinese insulator supplier certified by the South Korean market, covering 160kN, 300kN, and 420kN product series;

2004

Myanmar

In 2004, became the FIRST Chinese insulator supplier certified by the Myanmar market;

2002

the United Kingdom

In 2002, became the FIRST Chinese insulator supplier accredited by National Grid UK;

2001

India

In 2001, supplied products for the ±500 kV HVDC (High-Voltage Direct Current) transmission line project from Mundra Port to Haryana, India, becoming the FIRST Chinese insulator supplier qualified to supply for India's ±500kV line projects;

1996

India

In 1996, became the FIRST Chinese insulator supplier certified by the Indian market. Launched the supply of products for the 400kV hydropower station evacuation project in the same year;