Where is the intelligence of the smart grid? Experience from the magical power distribution system
In the concept of ordinary people, the smart grid may be far away from us, at most a display of a concept. However, the comprehensive demonstration project of smart grid in Jiangsu Yangzhou Economic and Technological Development Zone under the general contract of Guodian NARI Technology Co., Ltd. (hereinafter referred to as Guodian NARI), a subsidiary of NARI Group, vividly showed us the practicality and convenience brought by the smart grid .
The reporter learned that the project fully applied the latest technology and achievements of the State Grid Corporation in the field of smart grids, practiced the technical route that the urban area smart grid should follow, and built a total of 11 sub-items of the smart grid comprehensive demonstration project, covering the power system. The development, transmission, transformation, distribution, use, dispatching, and communication links fully reflect the practice of smart grids in smart cities.
There is a lot of potential for photovoltaic power generation to be smoothly connected to the grid
"This demonstration project has built a 10 kV distributed photovoltaic power generation grid-connected and microgrid operation control system, which has achieved distributed power grid-connected power curve tracking, maximized use of clean energy, combined economic dispatch of optical storage, and optimization of off-grid optical storage. Self-adaptive adjustment of various operating modes and operating states such as smooth switching of operation and off-grid operation, and the realization of friendly access to distributed photovoltaic power generation, interaction and mutual support of distributed power supply and distribution network, and improved distribution network The ability to accept distributed power. "Guodian Nari ’s on-site technical director told this reporter," The system has two highlights. One is the use of optical storage intelligent joint scheduling to suppress fluctuations in new energy power generation, and the second is to dispatch optical storage power stations to participate. Distribution network feeder automation improves the reliability of power supply for important users. "
The output of photovoltaic power generation is affected by the weather and changes with the change of light intensity, which is an unstable power source for the power grid. The project allocates energy storage batteries reasonably according to the installed capacity of distributed photovoltaic power generation, and uses light storage intelligent joint scheduling to smooth the fluctuations of new energy power generation. This is like configuring a "reservoir" for the "trickle", and the lack of adjustments , Making distributed new energy power generation flexible and friendly access to the grid, breaking the technical threshold for distributed new energy power generation access to the grid, and greatly promoting the development of distributed photovoltaic power generation. At the same time, the grid connection of the optical storage power station provides a new power point for the distribution network. When the 10 kV distribution line is unable to supply power due to maintenance or faults, the optical storage power station can be used as a backup power source to accept the dispatch of the distribution automation master station and participate in the feeder automation of the distribution network. The optical storage power station and the surrounding load can form a microgrid Operation, reduce the outage time of the surrounding load and improve the reliability of its power supply.
Smart grid, see the six roads, listen to all directions
The reporter of the newspaper saw the deployment of the Yangzhou Smart Grid Integrated Visualization Platform in the Dispatching and Control Center of Yangzhou Power Supply Company. A 3 & TImes; 8 total of 24 70-inch DLP display screens were used as the carrier to fully display the construction results of the Yangzhou Smart Grid Comprehensive Demonstration Project and various Link information. According to reports, this platform is the first smart grid integrated visualization application platform in China that integrates smart grid achievement publicity, integrated business simulation interactive display, and real-time / quasi-real-time operation monitoring of the grid. Comprehensive information sharing and real-time dynamic display of various links of transformation, distribution, use, and scheduling, and comprehensive analysis of multi-system data, using 3D virtual reality technology, FLEX, power system dynamic simulation technology, intelligent video analysis technology, etc., through real-time online analysis And multiple methods of offline simulation and simulation, with the power grid business as the core, in-depth mining of effective data in each link to achieve integrated applications, comprehensive analysis, full-range, panoramic, and full-dimensional visualization, and improve the ability of staff to control and make decisions on the power grid. Provide intelligent auxiliary decision-making for power grid operation management.
Magical and sensitive distribution automation system
For a long time, the relevant staff has often been troublesome in order to eliminate a fault on the line, and has a distribution automation system that can help you locate the fault in 15 seconds. Shen Haodong, the person in charge of the project, introduced that the distribution automation system is the core of the demonstration project, which mainly adopts a mixed operation mode of intelligent distributed feeder automation and centralized feeder automation of the main station. In layman's terms, when the intelligent distributed feeder automation mode is adopted, if the power distribution line fails, only 200 milliseconds can be used to automatically detect and locate the fault point through the signal exchange between the smart distribution terminals, and automatically jump the fault point The side switch automatically completes the fault isolation, and then the power distribution automation master station system remotely closes the contact switch to restore power to the non-faulted area. When using the centralized feeder automation mode of the main station, if the distribution line fails, the main station can locate the fault point within 15 seconds, remotely trip the switches on both sides of the fault point to achieve fault isolation, and close the 10kV outlet switch and contact switch of the substation The power supply in the non-faulted area was restored, and the entire program was executed in less than 3 minutes.
At present, the coverage of the distribution automation system in the demonstration area has reached 100%, real-time monitoring of the operation status of power supply equipment has been achieved, which greatly shortens the troubleshooting time and improves the efficiency of equipment use; on average, it can save equipment investment of nearly 3 million a year The operating cost is nearly 1.5 million yuan, which effectively improves the economic benefits of the area and reduces the corresponding investment in transmission and distribution construction. The demonstration project also built a power transmission and transformation equipment status detection system, intelligent substation, power quality monitoring, electricity information collection system, intelligent community, electric vehicle charging and replacement facilities, intelligent park, communication information network and security system.
It is understood that the Smart Grid Comprehensive Demonstration Project in Jiangsu Yangzhou Economic and Technological Development Zone is one of the pilot projects of State Grid Corporation to build a strong smart grid, and is also a demonstration project embodying the concept of "smart city". The project construction can promote the establishment of energy production and consumption methods that meet the requirements of sustainable development, optimize energy structure, increase the proportion of clean energy, promote industrial upgrading, develop low-carbon economy, and be resource-saving, environmentally friendly, and socially harmonious. Cities and effectively responding to the challenges posed by global climate change are of great significance.
Film Cutting Machine,Skycut Mobile Screen Protector Film Cutter,Full Transparent Screen Protector,Tpu Screen Protector Cuttable
Shenzhen TUOLI Electronic Technology Co., Ltd. , https://www.hydrogelprotector.com