Problems and Solutions of Distribution Network Intelligent Technology

The intelligent construction of the power grid can enhance the power supply capacity of the power grid, reduce the cost of operation and maintenance of the power grid, optimize the monitoring mode of the power grid, and improve the operation level of the power grid. It is the development direction of the power distribution network. This paper analyzes the problems existing in the application of intelligent technology in the distribution network circuit, finds the corresponding solution strategy, and hopes to improve the stability and security of the distribution network circuit operation.

With the development of society and the improvement of people's living standards, the requirements for quality of life and materials have become higher and higher, and traditional forms of power distribution have been unable to meet the needs of society. Therefore, the distribution network system must be optimized to meet people's needs and not be eliminated by society. The distribution network line is the key to the power supply system and is responsible for the transmission and distribution of the entire power supply system. It also directly affects the safety and stability of the power grid operation. Therefore, in order to make the operation of the distribution network circuit safer and more stable, and in line with the actual needs of the majority of users, we must strive to improve the operation capability of the distribution network circuit. With the continuous improvement of China's scientific and technological level, the rapid development of computer technology, electronic technology and automation technology has gradually emerged automated intelligent technology.

The intelligent power grid is the improvement and improvement of the traditional power grid. The main purpose is to improve the efficiency of energy distribution and meet the needs of China's current power system development. The application of intelligent technology in distribution networks involves a lot of work, including not only technical requirements but also equipment requirements. Therefore, to promote the development of smart grids, it is necessary to scientifically plan the distribution network system. In this way, the smart grid can be brought into line with actual requirements and bring into play its own significance. In addition, the use of smart distribution networks can improve the security and stability of the distribution system.

What is a smart grid

The smart grid is actually the intelligence of the power grid. It is established on the basis of high-speed two-way communication networks and integrated networks. Advanced measurement technologies and sensing technologies are used to use advanced control methods, equipment technologies and advanced decision-making systems. Technology supports the goal of realizing the goals of safety, reliability, efficiency, economy, safe use, and environmental friendliness of the power grid. The main characteristics of the smart grid are motivation, self-healing, defense against attacks, provision of power quality requirements to meet current users, start-up of the electricity market and asset optimization and efficient operation, and allow intervention of different types of power generation.

Problems with distribution network intelligence

1. The intensity of distribution network infrastructure construction is insufficient.

(1) There is an aging problem in the wires in distribution lines. According to actual investigations, we can find that over 30% of the distribution lines in China are used over 15 years, and there is a serious aging phenomenon. This is extremely unsafe for the operation of distribution networks. of;

(2) Aging of power distribution equipment. The distribution equipment is very important for the operation of the entire power grid. Therefore, once problems occur in the distribution equipment, it will have a direct impact on the operation of the entire power grid. In addition, the maintenance and replacement work of the distribution equipment is not in place, which will increase the operational risks of the distribution network and will directly affect the reliability and stability of the power supply system.

(3) The switch models used in distribution networks are not uniform and the technology is relatively backward. In the distribution network, the use of switches is large, and the frequency of replacement is fast. Therefore, the unified model of switches can facilitate the management of switches. In addition, the related technology of the switch is still relatively backward, so it is necessary to enhance the corresponding technology to meet the requirements of the smart grid.

2. The automation level of distribution network is not high.

The development of our country's power system has always attached importance to power generation, so power distribution is often neglected. This is extremely unfavorable to the construction and development of distribution engineering. The development of China's distribution network intelligence technology is still only in the stage of development. Therefore, the technical operation and construction effects are still improving. The development of distribution line automation systems requires a large number of smart meters and smart switches. This will not only improve the actual work form of the distribution staff, but also greatly improve the reliability, stability and safety of the distribution network. However, the scope of use of the distribution network intelligence technology is still relatively limited. This is mainly because there is a gap in the actual economic strength of various regions, and the degree of intelligent application of distribution network is also not the same, so distribution of distribution network intelligent applications, Obvious unevenness has emerged.

Application of Automation Intelligent Technology for Distribution Lines

1. Strengthen the construction of distribution network infrastructure

(1) Timely replacement of equipment and facilities such as aging transformers, switch gates, lightning arresters, etc., in distribution network lines, especially dedicated users, requires more regular inspections and maintenance. For those equipment and facilities that are in disrepair for a long time, The need for timely repairs and replacements ensures that the power grid and the corresponding facilities can operate in a stable and secure atmosphere;

(2) There is a high load on the distribution network lines and the operating atmosphere is also tedious. Therefore, in the actual operation, many factors will affect the line aging problems and line damage. In view of the above phenomenon, we need to use or replace the new wire with better quality to improve the operational safety of the distribution line;

(3) New types of switches are used to gradually replace the traditional switches in the distribution network to avoid the effect of the automatic disconnection of the switches on the users, thereby improving the quality of the users' electricity.

2. Intelligent Technology for Distribution Line Protection

(1) Adaptive protection measures. The implementation of adaptive protection measures requires the integration of local actual information and no need to use additional communication equipment to complete the communication tasks;

(2) Adaptive protection system. The adaptive protection system can be combined with communication facilities, use local information and remote information, and be integrated with protection algorithms and adaptive function methods, so that all the change systems of the distribution network can be protected.

3. Strengthen inspections

The use of inspection techniques in the construction of distribution networks requires the use of many instrumentation devices such as signal acquisition devices, signal analysis processors, sensors, and signal amplifiers. In the process of using these instruments, the sensor receives the discharge signal, converts the processed information into an electrical signal, and then transmits the electrical signal to the amplifying device. The electrical signal is amplified by the amplifying device and converted into a digital signal. The use of patrol equipment in the construction of distribution network lines not only allows hazard assessment of distribution networks, but also solves problems that arise during the construction of distribution network lines.

The implementation of patrol inspection technology has the following advantages: It has stronger testing flexibility and more extensive inspection methods. When the distribution network detects a failure, it is possible to perform maintenance without disconnecting the power supply, which can reduce maintenance losses. In addition, the patrol technology acquires signals in many ways and can analyze them in a centralized manner. This ensures the correctness and stability of fault detection.

4. Strengthen feeder automation applications.

The feeder automation system is installed between the substation and the user. It not only can automatically detect the user's operating conditions, but also can prompt the fault signal to the faulty distribution network to prompt the staff to perform timely maintenance and quickly resolve the power distribution. The problem of faults in the network lines ensures that the distribution network lines can operate stably and safely. In general, feeder automation can be divided into voltage type automation and current type automation. Voltage-based automation can isolate faults in a timely manner, and at the same time automatically respond to the power supply capacity of the distribution network. Problems with branch lines can have a great impact, making it difficult to detect faults. Current-type automation faults are only in the branch, so the impact is less, and current-mode automation can isolate faults.

In short, as the main way for power users and power systems to connect, distribution lines have a direct impact on social and economic benefits. With the continuous development of the distribution network, people's living standards have been rapidly improved. Therefore, the requirements for the stability of distribution network operations have become higher and higher. The traditional distribution network management model has not kept pace with the development of the times and it is difficult to meet people's needs. In this regard, we have introduced intelligent technologies that can not only significantly reduce the maintenance of the distribution network, but also increase the failure detection rate of the distribution network. This can directly reduce the unnecessary economic losses, but also can Provide users with safe, stable and reliable power services.

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