Smart grid development is full of vitality, bringing industry customer value

With the development of smart grids, power systems have become more and more complex, control equipment has become more sophisticated and expensive, and its core electronic and electrical components have become more and more critical to the environment. In this regard, how to ensure the safe, reliable and efficient work of equipment has become the top priority for ensuring the safe operation of power systems.

On August 22, the two stock indexes opened lower, and the intraday volatility was triggered by the heavyweights. The sector was affected by the news that the State Grid invested 620 billion to build an ultra-high-voltage smart grid. The overall strength of the sector was strong, and Xu Ji Electric was strong. The daily limit, TBEA also rose more than 6%. On the news, Zhang Zhengling, deputy director of the State Grid Development Planning Department, said that in the next five years, the State Grid will invest 620 billion yuan to build 20 UHV lines to transport hydropower in the southwest and wind power in the northwest to eastern China. The development of UHV grids is not only a technological innovation, but also enables long-distance transportation, solves the large-scale development and utilization of renewable energy in China, and can improve the severe environmental pressures facing the current central and eastern regions. The construction of smart grids has ushered in a spring of vitality.

What is a smart grid?

The smart grid is based on the physical grid including various power generation equipment, transmission and distribution networks, power equipment and energy storage equipment. It will modernize advanced sensor measurement technology, network technology, communication technology, computing technology, automation and intelligent control. A new type of grid, such as technology, which is highly integrated with the physical grid. It can be observable (capable of monitoring the status of all equipment in the grid), controllable (capable of controlling the status of all equipment in the grid), fully automated (adaptive and self-healing) ) Integrated optimization of the system (optimized balance between power generation, transmission and distribution, and power consumption) to make the power system cleaner, more efficient, safer, and more reliable.

Smart distribution network development direction

The development trend of the distribution network is: emphasize the stable control and power quality under the bidirectional current state after the introduction of distributed energy; emphasize user interaction, with the increase of measuring points and real-time requirements, the background software will face real massive data, mobile internet The technology further integrates inspection, maintenance, overhaul and remote office (active distribution network).

The possible future directions of the distribution network are: the fusion of distributed intelligent microgrid and distribution network, the ring distribution network (revolution of relay protection), the DC distribution network and the AC/DC hybrid distribution network.

The specific directions are as follows: 1. Strengthen monitoring. Adopting more economical, reliable and advanced sensing, communication and control terminal technologies to realize real-time and comprehensive monitoring of distribution network operation status, asset equipment status and power supply reliability status, and realize observability of distribution network; Improve reliability and power quality. Study the theory and method of intelligent distribution network control, realize the self-healing control of power grid, study the distributed power supply into the distribution network operation control and protection technology, optimize the coordination and dispatch of all links in the transmission and distribution, and study the use of power electronic technology to realize electric energy. Flexible control of quality control and electric energy, reducing loss, improving power supply reliability and power quality; 3. State Grid Corporation's positioning of intelligent distribution network: covering all network equipment as a basic consideration, taking information resource comprehensive utilization as an important means With the distribution network scheduling/production command as the main body of application, the main purpose is to improve the management level of distribution network.

HD development helps the power industry

Due to technical limitations, the analog camera does not have enough grasp of the details. It often happens that someone sees someone stealing but can't see the face. At the same time, the dispatch center introduces the scene of the substation in real time, and introduces the fifth remote-remote. As a matter of fact, "remote vision" requires the duty officer to see clearly the appearance of the instrument, the switch closure state and the appearance of the substation equipment through the video surveillance system in the remote dispatching center. The standard definition image provided by the traditional analog camera cannot meet the above requirements. Therefore, the introduction of high-definition monitoring technology will become the development trend of the power industry monitoring system.

The value that HD brings to customers in the power industry:

The details of the image are more vivid

HD has obvious advantages over standard definition. From the perspective of resolution, the resolution of 720p is 9 times of CIF resolution, and the resolution of 1080i/1080p is 20 times of CIF resolution. Under the same display environment. HD will be much clearer.

Image color reproduction is more realistic

In the field of video surveillance, analog surveillance cameras usually use composite video streams for transmission. Although the composite video stream is transmitted at a longer distance than other analog transmission methods, the luminance and chrominance signals in the composite video signal are mixed transmission. Therefore, mutual interference between the two will be inevitable. Bright color interference can cause a lot of noise and noise on the screen, making the picture blurred, especially when shooting large patterns with the same size, such as leaves, brick walls, roof tiles, etc.

Because the digital high-definition monitoring adopts the technology of bright color separation, the luminance signal and the chrominance signal are separately coded, which can effectively prevent the bright color from interfering with each other and make the image restoration more realistic. The application of high definition in the power industry can display the color of some indicator lights more accurately.

Gain a broader perspective

The HD camera uses a 16:9 wide viewing angle video capture specification, which provides a wider viewing angle at the same focal length than an analog camera.

The objects of high-definition monitoring in the power industry mainly include: remote monitoring and monitoring of the environment in the substation area; the operating status of important equipment such as transformers and circuit breakers; the appearance status of high-voltage equipment such as CT, PT, cable joints and insulators in the substation; The state of the grounding knife gate; the main indoor environment temperature and humidity alarm and thermometer image of the substation main control room, high voltage room, capacitor room, independent communication room; the appearance of other oil-filled equipment and flammable equipment; bus area, The condition of the cable layer, etc.

Based on the above three points, the digital high-definition monitoring using networked technology transmission has obvious advantages in the power industry application, and will definitely replace the standard-definition monitoring in the near future, occupying a dominant position.

Conclusion

In recent years, high-definition products, intelligent analysis, and large-scale platform construction have sprung up everywhere. They have been well applied in various industries. The application of high-definition, intelligent analysis, and large-scale networking in professional power grid monitoring has just started. Scientific development is the unchanging theme. The transformation of development mode is becoming the main theme. The smart grid is an important part of the construction of power systems. Its safe and efficient operation is related to the stability and security of the entire power system and even the people's livelihood.