Build a monitoring defense line for power grid security
Lande Electric's core products such as online monitoring and fault location help build new power systems
Source:China Electric Power News
This year's government work report proposed that "in the past five years, the installed capacity of renewable energy has increased from 650 million kilowatts to more than 1.2 billion kilowatts, and the proportion of clean energy consumption has increased from 20.8% to more than 25%", "promote the clean and efficient use of coal and technological research and development, and accelerate the construction of a new energy system", etc., which has boosted confidence and pointed out the direction for the construction of my country's new energy system.
"With the continuous advancement of the new power system with new energy as the main body, the large-scale new energy grid connection on the power generation side and the increasingly complex load on the user side will have an impact on the stability of the power grid and pose a severe challenge to the reliability of the power grid. We have paid attention to this changing trend very early, and actively increased our research and development efforts, starting with product iteration to deal with the grid stability issues brought about by the connection of new energy to the grid. Langde Electric uses more sensitive and reliable sensing technology, digital acquisition modules and devices, and powerful intelligent recognition technology to achieve modularization, digitization, and miniaturization of products, helping to improve the stability of the power grid, thereby safeguarding the new power system." Chen Yong, general manager of Wuhan Langde Electric Co., Ltd. (hereinafter referred to as "Langde Electric"), a holding subsidiary of SUN.KING Technology Group Co., Ltd. (hereinafter referred to as "SUN.KING Technology"), said in an interview with a reporter from China Electric Power News.
A major project demonstrates responsibility and supports national brand technological innovation in spine science
With the rapid expansion of new energy installed capacity, some retired thermal power units will be gradually replaced in the future. "Especially in the 'Three Norths' region where the scale of wind and solar power installed capacity is huge, there is an urgent need to improve the long-distance power transmission capacity. In addition, during the '14th Five-Year Plan' period, the '10 AC and 10 DC' ultra-high voltage lines that will be approved for construction will also send positive signals for online monitoring, intelligent sensing, digital technology and other equipment." Chen Yong said.
Facing the transformation and development of smart grids, as a member company of SUN.KING Technology, a leading and influential power electronic device supplier and system integrator in the industry, Langde Electric relies on SUN.KING Technology's cutting-edge power electronic technologies such as solid-state switches, impedance measurement, and online monitoring, and has gradually accumulated profound R&D, production, commissioning, installation and maintenance experience in the substation and transmission online monitoring industry. 2em;">GOM GIS/GIL partial discharge online monitoring series, OSF SF6 gas online monitoring series, EOM cable and submarine cable comprehensive monitoring series have achieved fruitful results in the field of online monitoring of many large-scale projects at home and abroad, and have achieved transcendence in technologies such as intelligent sensing, high-precision data acquisition, large-capacity digital logic algorithms, intelligent recognition algorithms, and high-precision time synchronization.
GIS partial discharge online monitoring system, consists of "UHF sensor", "signal acquisition unit" and "monitoring host". The partial discharge signal is collected by UHF antenna, amplified, filtered and detected, and a spectrum is generated after data processing and transmitted to the server. It monitors, displays, analyzes and warns the operation status of the tank. It has the characteristics of higher sensitivity, full localization of parts, wide monitoring range, high accuracy and strong product adaptability.
According to Chen Yong, as early as 2015,15px 0px 0px; line-height: 2em;">Lande Electric's domestically produced products with completely independent intellectual property rights have gradually replaced similar imported equipment from abroad, breaking the situation of heavy reliance on imported equipment in the field of online monitoring.Take the GIL fault location and partial discharge online monitoring system as an example. It can reduce the losses caused by power outages due to faults, greatly shorten the maintenance time, and save 80% of manpower and time costs for customers. In recent years, this product has been successfully used in the world's high-voltage gas-insulated metal-enclosed transmission line projects with the highest voltage level, largest transmission capacity and longest transmission distance. Compared with traditional foreign manufacturers, we not only have localization advantages and more advanced technology, but also pay more attention to high-quality services and good interactive relationships with customers.
In recent years, <span style="box-sizing: GIL is widely used in underground transformation of overhead lines in urban areas, long-distance and large-capacity underground power transmission, and power supply in extreme environments. Therefore, it is crucial to quickly and accurately locate the GIL fault position to ensure the smooth operation of GIL. Due to the special fully enclosed structure of GIL equipment, it is difficult for technicians to grasp its internal operation and discover potential operating risks. When a GIL breakdown accident occurs, the fault position cannot be accurately located in the first time.
“In response to these technical difficulties, Lande Electric has developed a 0px 0px; line-height: 2em;">GIL arc ultrasonic fault location system has functions such as high-bandwidth filter, nanosecond clock synchronization, and multi-dimensional monitoring data. It can collect data in real time and accurately locate the fault location. The cooperation of these underlying technologies ensures the monitoring sensitivity and positioning accuracy of the equipment, and guarantees the stable operation of GIL." Chen Yong said.
At present, Wuhan Langde Electric's core products such as substation GIS/GIL ultra-high frequency partial discharge monitoring, transformer partial discharge monitoring, and GIL ultrasonic fault location have been used to ensure operation in hundreds of newly built (renovated) substations, offshore wind power, ultra-high voltage transmission, and urban power distribution applications at home and abroad, especially in major national projects such as the Xiluodu Hydropower Station, Nantong Binjiang GIL Project, and the 2022 Beijing Winter Olympics, forming the backbone of the national brand.
Deep integration of digitalization, enabling intelligent perception of power grid monitoring
In recent years, UHV construction has been in full swing, providing support for the "West-to-East Power Transmission", the grid connection and consumption of renewable energy in the receiving power grid, and cross-regional transmission, and has become an effective way for my country to optimize power configuration and balance energy and load distribution.
"In order to ensure the safe and stable operation of the UHV power grid, Langde Electric mainly uses <span style="box-sizing: border-box; margin: 0px 0px 10px; padding: 0px Our main products are online monitoring devices for power transmission and distribution networks. We have been listed in the qualified supplier lists of State Grid, China Southern Power Grid, China National Electric Power Equipment Group Co., Ltd. and other companies for many years in a row. We are one of the top three domestic brands in terms of market share of online monitoring systems in the domestic UHV field.” Chen Yong said that with the development of UHV construction, there are still many difficulties in the online monitoring industry that need to be overcome.
At present, the main technical difficulties in the field of online monitoring are mainly reflected in: more sensitive sensors, large-capacity digital processing technology and algorithms, the accuracy of fault type pattern recognition, high-precision data collection, Beidou data synchronization technology and other breakthroughs.
Chen Yong said that Lande Electric will continue to actively deepen its research on sensor technology, simulation model establishment, digital logic algorithm, artificial intelligence recognition and high-precision time synchronization technology, and will be committed to the research and development of multi-intelligent sensor primary equipment integration technology, explore completely domestic software and hardware solutions, and develop intelligent sensing devices and general intelligent APPs to meet the transformation and development of the State Grid's digital system and the construction trend of the Southern Power Grid's digital twin power system.
"The future direction of online monitoring is mainly Intelligent sensing, intelligent perception. Integrate the existing sensing technology and monitoring technology to realize integrated intelligent sensing. Through the integration of sensing technology, monitoring technology, 5G technology, Beidou technology, artificial intelligence technology and multiple types of technology, realize intelligent perception and intelligent monitoring of online monitoring." Chen Yong pointed out the development direction of online monitoring technology.
It can be foreseen that intelligent sensing devices will be widely used in power systems. With the promotion of digital substations, GIS/GIL equipment, transformers, high-voltage cables, switch cabinets, etc. need more complete intelligent sensing devices to escort. Based on the technology of existing online monitoring devices, Langde Electric has carried out the research and development, pilot application and engineering implementation of intelligent sensors, and applied more digital, modular and intelligent intelligent sensing equipment to various engineering projects, making the field of intelligent perception and online monitoring more intelligent and digital, and providing more intelligent technical support for operation and maintenance.
