GS Zhou
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On Dec. 31, 2018, Changji-Guquan ± 1,100 kV UHV Project, the world's first ±1,100 kV UHV DC transmission project, designed and constructed independently by China, successfully began full-voltage power transmission.
The Project was approved in December 2015 and construction began in January 2016. Starting from the Changji Converter Station in Xinjiang and finishing in the Guquan Converter Station in Anhui, it passes through Gansu, Ningxia, Shaanxi, and Henan in the process with a total length of 3,293 kilometers, a rated voltage of ±1,100 kV and transmission capacity of 12 GW. It is currently the world's largest and most technologically advanced transmission project with the highest voltage level, the largest transmission capacity, and the longest transmission distance.
For the first time in human history, 10 GW level power transmission at a range of 3,000 to 5,000 kilometers becomes possible. It marks a major technological leap and milestone in the field of high-voltage transmission in the world. The transmission capacity of a single ±1,100 kV DC project can meet approximately 1/2 of the electricity demand of a medium-developed Chinese province, while the economic transmission distance can meet the needs of cross-border and even inter-continental power transmission, and can greatly improve resource allocation capability of the power system.
Facing imbalance between power supply and demand, shortage of land resources and environment protection, the well-developed East China is in no condition to further expand local coal-fired power generation. Changji-Guquan ±1,100 kV UHV DC Project represents the “Power Silk Road” connecting West- and East-China. It can transfer 66 TWh of electricity to East China every year to meet the demand of 50 million households and reduce coal transportation by 30.24 million tons per year (the equivalent of 25,000 trains with 20 cars each if calculated by train capacity).
世界首条±1100千伏特高压直流输电线路实现全压送电
2019年1月，昌吉—古泉±1100千伏特高压直流输电线路成功实现全压送电，使得我国成为世界首个具备3000至5000公里范围内输送千万千瓦级电能能力的国家。
昌吉—古泉±1100千伏特高压直流输电线路由国家电网公司、中国西电集团、特变电工等单位历时6年研制建设而成。该条线路起于新疆昌吉换流站，止于安徽宣城古泉换流站，途经甘肃、宁夏、陕西、河南，全长3293公里，额定电压±1100千伏，输电容量1200万千瓦，是目前世界上电压等级最高、输送容量最大、输电距离最远、技术水平最先进的输电线路。
该条线路实施过程中，实现了技术、装备等多方面的突破。一是突破了特高压直流成套设计、特高压换流阀阀塔内暂态电压分布数学模型建模仿真、高端换流变压器绝缘、高性能/大容量直流氧化锌电阻片制造等关键技术，实现了“直流电压、交流电压和输送容量”的全面提升；二是突破了特高压直流输电换流阀、换流变压器、直流隔离开关及接地开关、直流母线避雷器、直流系统用棒形支柱复合绝缘子等特高压直流输电领域关键短板装备；三是采用先进的高电压、大电流、低损耗换流技术和新一代智能电网技术，破解了远距离大功率高电压直流输电、跨大区电网互联等世界级技术难题。
昌吉—古泉±1100千伏特高压直流输电线路是“疆电外送”标志性工程。据了解，该线路启动后，每年可送电660亿千瓦时，满足5000万家庭的用电需求，约减少燃煤运输3024万吨，相当于减少2.5万趟20节车皮的列车运输量，对促进新疆能源基地开发和全国范围的优化资源配置具有重大意义。
The Project was approved in December 2015 and construction began in January 2016. Starting from the Changji Converter Station in Xinjiang and finishing in the Guquan Converter Station in Anhui, it passes through Gansu, Ningxia, Shaanxi, and Henan in the process with a total length of 3,293 kilometers, a rated voltage of ±1,100 kV and transmission capacity of 12 GW. It is currently the world's largest and most technologically advanced transmission project with the highest voltage level, the largest transmission capacity, and the longest transmission distance.
For the first time in human history, 10 GW level power transmission at a range of 3,000 to 5,000 kilometers becomes possible. It marks a major technological leap and milestone in the field of high-voltage transmission in the world. The transmission capacity of a single ±1,100 kV DC project can meet approximately 1/2 of the electricity demand of a medium-developed Chinese province, while the economic transmission distance can meet the needs of cross-border and even inter-continental power transmission, and can greatly improve resource allocation capability of the power system.
Facing imbalance between power supply and demand, shortage of land resources and environment protection, the well-developed East China is in no condition to further expand local coal-fired power generation. Changji-Guquan ±1,100 kV UHV DC Project represents the “Power Silk Road” connecting West- and East-China. It can transfer 66 TWh of electricity to East China every year to meet the demand of 50 million households and reduce coal transportation by 30.24 million tons per year (the equivalent of 25,000 trains with 20 cars each if calculated by train capacity).
世界首条±1100千伏特高压直流输电线路实现全压送电
2019年1月，昌吉—古泉±1100千伏特高压直流输电线路成功实现全压送电，使得我国成为世界首个具备3000至5000公里范围内输送千万千瓦级电能能力的国家。
昌吉—古泉±1100千伏特高压直流输电线路由国家电网公司、中国西电集团、特变电工等单位历时6年研制建设而成。该条线路起于新疆昌吉换流站，止于安徽宣城古泉换流站，途经甘肃、宁夏、陕西、河南，全长3293公里，额定电压±1100千伏，输电容量1200万千瓦，是目前世界上电压等级最高、输送容量最大、输电距离最远、技术水平最先进的输电线路。
该条线路实施过程中，实现了技术、装备等多方面的突破。一是突破了特高压直流成套设计、特高压换流阀阀塔内暂态电压分布数学模型建模仿真、高端换流变压器绝缘、高性能/大容量直流氧化锌电阻片制造等关键技术，实现了“直流电压、交流电压和输送容量”的全面提升；二是突破了特高压直流输电换流阀、换流变压器、直流隔离开关及接地开关、直流母线避雷器、直流系统用棒形支柱复合绝缘子等特高压直流输电领域关键短板装备；三是采用先进的高电压、大电流、低损耗换流技术和新一代智能电网技术，破解了远距离大功率高电压直流输电、跨大区电网互联等世界级技术难题。
昌吉—古泉±1100千伏特高压直流输电线路是“疆电外送”标志性工程。据了解，该线路启动后，每年可送电660亿千瓦时，满足5000万家庭的用电需求，约减少燃煤运输3024万吨，相当于减少2.5万趟20节车皮的列车运输量，对促进新疆能源基地开发和全国范围的优化资源配置具有重大意义。
