The FGI distribution transformer area flexible interconnection integrated solution leads the new era of smart power
1.Background of the transformer area
A distribution transformer area is actually a professional term in the power system, referring to the power supply area of a substation (a certain transformer that is installed or in operation). According to different load types, it can be divided into four categories: urban residential transformer areas, commercial transformer areas, industrial transformer areas and agricultural transformer areas. There is no containment relationship between area, area, area, it is several different dimensions and function classification, no specific/proportion relationship. Distribution area as a power supply for power users "core unit", and "center" of low voltage power control, the operation status of distribution area is directly decided to power users can access to electricity, with good electric ".
2.Current distribution substation solution
There are no auxiliary devices at all. A separate transformer for the transformer area is used to supply power to the area. The advantages are simplicity and reliability, low investment cost and relatively low system complexity.
The main problems existing in the current power supply of distribution transformer areas are:
Low power supply reliability
The distribution transformer area is operating alone. Any damage to the distribution network, transformer area transformer, energy storage equipment or any other device will directly affect the load operation relationship of the entire transformer area. After an abnormal power failure occurs, there is no better solution except power outage.
The changes in the capacity of the transformer area cannot be dealt with
With the continuous changes in power generation, the load conditions of each transformer area are changing at all times and in all places. Under different power generation systems, some transformer districts are underfed while others are on the verge of collapse. In extreme cases, there will be an extremely unbalanced power load, and the power system will approach the brink of collapse.
The power supply safety capacity is insufficient
The power load enterprises under the jurisdiction of the distribution transformer area have a single source of power supply and cannot obtain more power supply security guarantees. After a power failure occurs in an enterprise, apart from the power outage being unable to effectively reduce the damage, it is also unable to effectively select and guarantee key loads, which may bring unexpected disasters to the production and operation of the enterprise.
Where is the consumption of new energy insufficient
With the advancement of China's zero-carbon policy, more new energy systems are gradually being connected to the distribution network. The original single load consumption end of the distribution network has also become the production end of new energy power, and at the same time, it has become the source of electricity and the source of load consumption. Originally, the capacity of the distribution transformer area was fixed, making it impossible to dynamically respond to changes in the transformer capacity.
3.FGI's new generation of flexible interconnection integrated solution
The flexible interconnection system of FGI Electronics' transformer districts can support the interconnection and communication of multiple transformer districts. The installation method is to establish the DC bus using the AC-DC system and connect the transformer in the transformer area that requires interconnection and mutual assistance in parallel. Then, the DC equipment for distribution storage in the transformer area is directly connected to the DC bus, achieving interconnection and mutual assistance among the transformer areas. FGI adopted the distribution area of low voltage side sharing each other aid dc bus solution, this solution is very obvious trend of reservoir function provides the low voltage side energy, can very good complete the area between the flexible connected each other aid. This system is simple to install and debug, convenient to use and easy to maintain. According to the unified energy management and dispatching system, data mining and analysis, power flow prediction, energy dispatching, etc. are carried out to maximize the efficiency of distribution in the transformer area.
4.The advantages of flexible interconnection solutions over traditional ones
Improve the reliability of power supply
Through flexible interconnection technology, mutual backup and flexible switching among multiple power sources can be achieved. When a certain power supply malfunctions or undergoes maintenance, the system can quickly transfer the load to other normal power supplies to prevent power outages and ensure continuous power supply for users. Meanwhile, it can also provide dual or multiple power supplies for important loads, further enhancing their power supply reliability.
Improve power quality
This system is capable of real-time monitoring and optimal control of electrical energy. On the one hand, it can effectively suppress voltage fluctuations and flicker, ensuring the stability of the supply voltage. On the other hand, it can control harmonics, reduce the harm of harmonics to the power grid and electrical equipment, improve the quality of power, and meet the needs of some users with high requirements for power quality, such as precision manufacturing and data centers.
Improve the operational efficiency of the distribution transformer area
The flexible interconnection integrated system can dynamically adjust the output and operation mode of the power supply according to the changes in load, achieving the optimal matching of power supply and load. Through intelligent control strategies, the loads among various power sources are rationally allocated to ensure that power equipment operates within an efficient range, reduce line losses, thereby enhancing the operational efficiency of the entire distribution transformer area and conserving energy.
Promote the access of distributed power sources
With the large-scale integration of distributed power sources such as solar and wind energy into distribution substations, the intermittent and uncertain nature of their output poses challenges to grid operation. The flexible interconnection integrated system can provide a friendly access platform for distributed power sources. Through flexible control technologies, it can smooth the output fluctuations of distributed power sources, enabling them to better integrate into the grid, enhancing the grid's ability to accommodate distributed power sources, and promoting the widespread application of clean energy.
Realize intelligent power distribution and interactive services
By leveraging intelligent communication technologies and advanced control algorithms, the flexible interconnection integrated system of distribution transformer areas can achieve two-way interaction with users. The system can promptly understand the electricity consumption demands and behaviors of users, and provide personalized electricity services based on users' needs. At the same time, users can also adjust their electricity usage time and methods reasonably according to the electricity price information and the guidance of the system, to achieve peak shaving and valley filling, and improve the overall operational efficiency of the power system.
Meet the development needs of the future power system
As the power system moves towards intelligence and digitalization, distribution substations, as the "last mile" connecting the power system with users, need to possess higher flexibility, adaptability and intelligence levels. The flexible interconnection integrated system is an important direction for the upgrading and transformation of distribution substations, which can provide support for the development of the future power system and meet the requirements of new power system construction and energy transition.
The flexible interconnection system of FGI's transformer areas can support the interconnection and interoperability of multiple transformer areas. The installation method is to establish the DC bus using the AC-DC system and connect the transformer in the transformer area that requires interconnection and mutual assistance in parallel. Then, the DC equipment for distribution storage in the transformer area is directly connected to the DC bus, achieving interconnection and mutual assistance among the transformer areas.
Delaying the change of distribution transformer areas
Through the flexible interconnection device of FGI Electronics, it is expected to solve about 10% of the load demand changes of distribution transformer areas, delaying the transformation of distribution transformer areas by 1-2 years. It is estimated that the annual savings in costs for distribution transformer area transformation and other aspects will be around 600,000 yuan.
Increase in sales electricity volume
After adopting the flexible interconnection device, it is expected that the sales electricity volume of the sales company can be increased by approximately 5%. The loss of sales electricity volume due to the renovation of distribution transformer areas has been reduced, and it is expected to bring an annual benefit increase of 300,000 yuan to the power supply company.
Reduce power supply line losses
After installing flexible interconnection devices on the main side of the transformer area, the energy flow in the distribution network can be effectively reduced, the local energy consumption capacity can be provided, and the line loss in the power supply and distribution transformer area can be effectively reduced. It is estimated that a distribution substation area can reduce losses by 30,000 yuan per year.
