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XJ Group Corporation

XJ Group Corporation, directly subordinate to SGCC, is a high-tech modern industry group focused on electric power, automation and intelligent manufacturing in China. As one of the leading enterprises in the domestic equipment manufacturing industry, the Corporation actively carries out its social responsibility as a large state-owned enterprise, is dedicated to provide high-end energy and electric power technology and equipment for national economy and social development and provides overall technical and service support for production, transportation, distribution and effective use of clean energy. 

The Corporation focuses on ten core businesses, that is, UHV, intelligent grid, new energy, electric cars, rail transit and intelligent industry, environmental protection, Smart City, intelligent manufacturing, advanced energy storage and electro-military industry and the products are widely applied to the electric power system.
XJ Group is one of the first national innovative enterprises and has been awarded many honorary titles such as the Commendation Award of the first “China Industrial Grand Prize” and a finalist of the first “China Quality Award”. With more than 10,000 staff, the Corporation has a national enterprise technological center, a national HVDC transmission equipment engineering research center, a national energy active distribution network technology R & D center and a national electrical instrument quality supervision and inspection center and is the unit undertaking the secretariat of IEC/TC85 Technical Committee and the secretariat of National Standards Technical Committee Electrical Measuring Instruments.

XJ Group has 13 subsidiary (branch) companies, 2 R&D centers in Xuchang and Beijing, 3 R&D branches in Shanghai, Xi’an and Harbin, 7 industrial bases in Xuchang, Zhuhai, Fuzhou, Xiamen, Jinan, Harbin and Chengdu and sets up 7 overseas offices in Southeast Asia, Middle East, Africa, Russia and South America.
XJ Group pursues development driven by innovation, is tightly around independence of national major equipment and core technologies, insists on driving industrial upgrading by technological innovation, has nearly 1,200 items of valid patent and nearly 300 items of invention patent and achieves a batch of key technology breakthrough, among which the “key technologies, complete equipment and project application of UHV AC transmission” participated by XJ Group has been awarded the Special class of National S&T Progress Award and the “Major complete technologies and equipment R & D and industrialization of UHV DC” project has been awarded the first class of National S&T Progress Award. 

XJ Group has formed three basic technologies, that is, “the information and automation control technology, the high-power electronic technology and the design and manufacture technology for primary equipment”, three basic platforms, that is, “the embedded software platform, the embedded hardware platform and the system software platform” and over 130 core technical products and has created dozens of “China’s first” and “World’s first”.

XJ Group actively participates in national major projects and has provided successively excellent complete equipment for large projects such as UHV intelligent grid construction, Three Gorges Dam and nuclear power construction and high-speed rail construction, which breaks up foreign monopolies, replaces import technologies, saves a large amount of national project investment and enables national industry to be in the front rank in the world. 
In aspect of power grid, the Corporation has participated in constructing all domestic UHV DC transmission projects such as the “Xiangjiaba-Shanghai project”, the “Yunnan-Guangdong project” and the “Yibin-Jinhua project”, all domestic UHV AC transmission projects such as the Southeast of Shanxi-Jinmen project and the Ximeng-Shandong project, distribution network projects in over 30 provinces, cities and districts such as Beijing and Shandong Province and hundreds of intelligent substations such as the 750 kV intelligent substation in Yan’an City, Shaanxi Province and the 220 kV intelligent substation in Dashi Town, Chongqing City and has provided approximately 60,000 switch cabinets and 15 million electricity meters for the national city and countryside power grid modification project. 

UHV Power Transmission and Power Electronics

XJ Group has achieved a series of achievements with independent intellectual property rights in UHV DC transmission control and protection systems, converter valve equipment, DC field equipment, and UHV AC control protection and monitoring systems, and its technical level and industry status are at the world's leading level. , Leading the development of the world's UHV DC equipment technology and engineering technology.

  • Independently developed the world's first ±800kV/3125A optically controlled converter valve assembly, the world's first ±800kV/4000A electronically controlled converter valve assembly, and the world's first largest delivery capacity and highest voltage level Back-to-back DC engineering converter valve.
  • Independently developed the world's first: ±800kV, 6.4 million kilowatt DC transmission control and protection system, and successfully applied to Yunnan-Guangzhou, Sichuan-Shanghai, Nuozhadu-Jiangmen and other ±800kV UHV DC transmission projects. Multiple ±800kV UHV DC transmission projects in Shanghai, Nuozhadu-Jiangmen, etc.
  • Advanced research and development of the world’s largest operating current ±1100kV UHV DC transmission converter valve, ±320kV flexible DC transmission converter valve, UHV DC field equipment integration and other products and technologies have filled the global gap and applied them on a large scale "Jinping-Sunan, Nuozhadu, Xiluodu" and other UHV DC transmission projects.
  • Provided complete sets of equipment and technical services such as substation monitoring system and series protection for 1000kV Jindongnan-Nanyang-Jingmen and 1000kV Huainan-Shanghai UHV AC transmission demonstration projects, supporting the further development and large-scale application of China's UHV AC transmission technology .

Intelligent industrial power supply and energy saving system

As a power equipment manufacturer and system integrator with the widest product coverage and strongest comprehensive supporting capabilities in China, XJ Group can provide a series of overall solutions of  intelligent primary equipment, industrial energy saving power saving system, special power supply for metallurgy, petrochemical, coal, military and other industries, and the overall solution for the ship's integrated power supply system.

  • XJ Group's intelligent industrial power supply and energy efficiency management system is characterized by "intelligence, energy saving, safety and economy". It uses existing Internet of Things technology and information acquisition technology to comprehensively automate substations, improve power quality, and industrial information collection and control. Energy management and other industrial production-related products are perfectly integrated to provide users with efficient solutions. At present, the system has achieved reliable applications in metallurgy, petrochemical, coal and other industries.
  • XJ Group's medium voltage switch products have outstanding advantages such as intelligence, efficiency, economy, and environmental protection. The self-developed N2 gas insulated metal enclosed switchgear uses the world's most advanced gas and solid insulation technology, modular plug-in technology, and vacuum circuit breaker. Switchgear technology and computer intelligent control technology are the latest generation of energy-saving and environmentally friendly gas insulated switchgear, achieving "zero pollution" and representing the direction of future switch technology development.
  • "Xuji" brand dry-type transformer was awarded the title of "China Famous Brand Product" and "China Energy-saving Product". Independently developed the 1600kVA three-column amorphous alloy transformer with the highest voltage level and the largest capacity in China. It is a representative of high-efficiency, environmentally-friendly and energy-saving transformers in the industry. Compared with ordinary transformers, its power loss can be reduced by up to 70%.
In aspect of new energy generation and grid, the Corporation has participated in constructing projects such as the Zhangbei wind, solar and energy storage demonstration station and the Nanji Island Microgrid Demonstration of the 863 program. 

New energy grid connection and power generation

XJ Group strives to solve the technical problems of wind power, photovoltaic power generation and other new energy development and grid connection. At present, the company has distributed power generation, smart micro-grid systems, photovoltaic power station monitoring systems, grid-friendly wind turbines, wind turbine converters, wind turbine main control systems, variable pulp systems, dynamic reactive power compensation devices, photovoltaic inverters, and storage systems. The complete series of products and system solutions required for the development, utilization and grid connection of new energy such as energy systems can reliably support the smooth connection of large-scale, intermittent renewable energy to the grid.

  • China's national Zhangbei wind and solar storage and transmission demonstration project is currently the world's largest large-scale new energy-friendly grid-connected comprehensive demonstration project integrating wind power, photovoltaic power generation, energy storage and smart power transmission. XJ Group provided wind turbines for this project Complete sets of equipment, complete sets of electrical equipment for photovoltaics, complete sets of electrical equipment for energy storage and other complete sets of equipment and technical support.
  • In the field of distributed energy, XJ Group has conducted a lot of basic research and technical reserves, led the formulation of photovoltaic and microgrid control standards and technical specifications, and participated in the discussion and formulation of distributed energy standards and technical specifications. It is also the national "863" project of China, China's first off-grid microgrid island project with load-Wenzhou Nantang Island off-grid wind and solar storage integrated system, and China's first wind and solar storage microgrid system-Xi'an World Horticultural Exposition More than 100 projects such as the wind and solar storage project, China's first six-electric power integrated large-load grid-connected microgrid project, Hunan Yongzhou Jianghua Kunwu Integrated System, etc. have provided stable and reliable differentiated system solutions and engineering services, effectively solving Technical problems of security and integration.
In aspect of charging electric cars, the Corporation has participated in many large projects such as intelligent charging demonstrations in big and middle cities such as Beijing, Shanghai, Nanjing and Qingdao and intercity fast charging stations on the Beijing-Shanghai Expressway, the Beijing–Hong Kong–Macau Expressway and the Qingdao-Yinchuan Expressway. 

Electric vehicle charging and replacement and drive control

XJ Group keeps a close eye on the global cutting-edge technology. For the first time in China, it has proposed a technical solution and operation plan for electric vehicle charging and swapping stations that integrate "charging, swapping, storage, and discharging". It is in the forefront of the industry in the construction of demonstration projects. XJ Group has developed the world's first electric vehicle Battery Pack Swapping Robot, which has been successfully applied to the Shandong Qingdao Xuejiadao Electric Vehicle Intelligent Charging, Swap, Storage and Discharge Integrated Demonstration Power Station Project with the most complete functions, the largest scale and the strongest service capabilities in the world. More than 60 charging stations have been put into operation in more than 20 provinces and cities including Beijing, Shanghai, Xi'an, etc.; China’s first "Internet of Things-based distributed electric vehicle (battery) management system" has achieved commercial operation in Tianjin, Nanjing and other places .

At present, XJ Group has become the only manufacturer in China that can provide a complete set of "charge, exchange, storage, and discharge" integrated equipment.
In aspect of Smart City, the Corporation has participated in constructing Jiaxing Smart City, Zhuhai Hengqin New Area Smart City and Shanghai Smart Transportation. In aspect of environmental protection, the Corporation has participated in energy saving retrofitting projects such as the energy saving retrofitting project in distribution networks in provinces such as Shandong, the SINOPEC great wall energy ethyne project and the Beijing Fangshan electricity heating retrofitting project. 

Smart substation

XJ Group has provided equipment and technical services for more than 300 smart substation projects with voltage levels of 750kV and below, and has rich and reliable operating experience. Some projects represent the current global advanced technology level. Among them, the CBZ-8000B intelligent substation system, for the first time in the world, proposes a centralized protection and control technology system for substations, and overcomes a series of worldwide technical problems such as triple play, PTN communication technology, and centralized protection and control;

Adopting XJ Group centralized protection and control system, the world's first highly integrated intelligent substations  "Liaoning Chaoyang 220kV Hejia Smart Substation", "Chongqing Dashi 220kV New Generation Smart Substation" and "Shanghai Yetang 110kV New Generation Smart Substation", and the highest voltage level in China "Shanxi750kV Yanan Smart Substation" have been successfully put into operation.

Smart power distribution system

XJ Group was the first in China to focus on the R&D and manufacturing of smart distribution network technology and related products. It is the largest supplier of distribution network automation complete equipment in China. It can provide a complete set of smart power distribution system products and integrated integrated solutions for smart power distribution networks. Program. XJ Group's intelligent distribution automation system can effectively solve the problem of power supply reliability in the distribution network, with a market share of more than 40% in China. After the system is fully configured, the reliability of the urban power grid is increased to more than 99.997%, that is, reaching the world's advanced level where the annual average household outage time does not exceed 15 minutes, which effectively guarantees the continuity of production and living power.

At present, the distribution network automation system solutions provided by XJ Group for Beijing, Shandong and other regions have greatly reduced the power supply failure rate and power loss through an intelligent and visual platform, and provided a complete technical solution for new energy access.

Smart power consumption system

XJ Group utilizes its overall advantages in the main station, terminal, information-to-patient communication and smart energy meter of the electricity consumption information collection system to provide smart electricity communities with green electricity solutions for different needs, and realize the interaction between the grid and users In response, the power grid's comprehensive service capabilities will be enhanced, and users will be encouraged to change their electricity consumption behavior patterns to help save energy and reduce emissions.

XJ Group can provide customers with a full range of smart energy meters, power management terminal products, smart home systems, power information collection systems and solutions; it has two smart power product manufacturing bases in Xuchang and Jinan, with an annual output of more than 1,000 Production capacity of 10,000 single-phase watt-hour meters, 3.6 million three-phase watt-hour meters and 400,000 smart terminal products.
In aspect of power generation, the Corporation has participated in major projects such as the Three Gorges Dam, Datang Guangdong Chaozhou Sanbaimen Power Plant 2×1000 MW set and the Qinshan Nuclear Power Plant. In aspect of rail transit, the Corporation has participated in all national high-speed rail projects such as the Beijing-Shanghai High-Speed Railway and the Harbin-Dalian High-Speed Railway and subway projects in cities such as Beijing, Shanghai and Guangzhou. Low voltage power distribution equipment such as the dry type transformer has been widely applied to important domestic construction projects such as Beijing Olympic venues and Shanghai Expo pavilions. 

Rail transit intelligent traction power supply

XJ Group has provided key technical support for the construction of China's high-speed railways and urban rail transit in the field of traction power supply. At present, all high-speed rail projects completed and under construction in China are equipped with Xu Ji's high-tech products to provide a steady stream of power guarantee.

XJ Group can provide independent intellectual property rights, international advanced traction power supply and power supply system integration solutions for the construction of passenger dedicated lines, intercity railways, electrified railways, subways, light rails and other rail transit projects.

  • The self-developed TA21 traction substation safety monitoring and integrated automation system has won China's "National Science and Technology Progress Award" and has a market share of more than 50% in China's high-speed rail project.
  • The self-developed ANS-8000 non-opening auto-passing neutral section system is the world's first set of phase passing system with self-protection function to meet the requirements of monorail two-way driving.
  • At present, the world's smallest environmentally-friendly gas-insulated ring network switchgear has low inflation pressure, which saves land resources and reduces pollution to the greatest extent. The market share of China's high-speed rail projects has reached more than 70%.
  • Metro regenerative braking energy feedback device, the device can automatically detect the catenary voltage to realize the input and exit feedback operation, and feedback the subway braking energy to the medium voltage ring network for reuse. The energy saving effect is significant, and the overall level has reached the international advanced level.
XJ Group actively speeds up developing international business, has shifted its focus from complete set export and matching supply to system integration and foreign investment and acquisition and has established an international business organization and management system and a supporting system for implementing international strategies. Currently, XJ Group has sold products such as the automatic protection systems, transformers, high voltage switches and intelligent electricity meters to over 30 countries and districts in Southeast Asia, South Asia, Africa, Middle East and South America and has successfully completed international EPC projects such as the Multifunctional Diesel Engine Plant in Burma and the Athi River Heavy Oil Power Plant in Republic of Kenya. XJ Group has been well received by international clients with sound product quality and excellent services.

In the future, XJ Group will develop to be a world-class energy equipment manufacturing and modern service industry group in an all-round way with innovation of technology, management, process, business pattern and new materials application as its engine guided by “providing low-carbon, energy-saving, environmentally friendly, intelligent, interactive high-end energy equipment and systematic solutions for sustainable development of the economic society”.

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