"China Precision": Terminating the "mm" blind zone of grid mobile operations

In the Internet era, where does the power of informationization in the power industry come from? How to further advance the process of power informatization? The guidance issued by the State Council on actively promoting the "Internet +" action gives the answer.

Recently, Huang Haihui, vice president of strategy of Beijing Hezhong Szhuang Technology Co., Ltd., said in an interview that “China Precision” under the background of “Internet +” has broad prospects and unlimited potential in the integration development of Internet and power, especially for power grid enterprises. Said. The deep integration and cross-border integration of the new generation of information and communication technologies represented by mobile internet, cloud computing and big data is the core content of the new round of grid upgrade and industry focus.

Compared with many companies, they are grabbing the entrance. In Huang Haihui's view, "smart terminals" and "miniaturization" are major propositions for the entire industry for B/S and C/S information projects that are currently dominated by the national grid. It is also a vast blue ocean market. The power grid industry should vigorously expand the breadth and depth of integration of the Internet and the power grid, and use the "Beidou" to become the core driving force for the informationization of China's power grid and an important driving force for the innovation and development of the power grid industry.

End the grid operation "millimeter" blind zone

Before the Beidou system was put into use, the differential data of China's power industry was forced to form a complete dependence on the US GPS and Russian GLONASS satellite navigation system because it was not supported by the autonomous satellite navigation system. It was almost related to all outdoor work of the grid company. Assets and related information, such as mobile industry mobile operations, line inspections, GIS data collection, etc., have huge security risks.

With the continuous deepening of grid information construction, the demand for space location and mobile interconnection (mobile operation, line inspection, GIS data collection) is increasing, and the shortcomings of traditional manual recording and manual data entry methods are gradually exposed. The method consumes too much labor and time costs and increases the error rate of data.

In Huang Haihui's view, in the practical application of China's power grid, the accuracy of some operations has been able to achieve an accuracy of 3-5 meters. However, with the attention of grid customers to efficiency and information engineering, “Yami, Cm, and mm” have been pushed to the front end of demand.

At present, the two network companies including the State Grid, the general mobile operation by the grid company to set up their own base stations, usually within 20-30 km range can obtain high-precision positioning; another precision is achieved through the ground-based enhanced network. For example, if 5-6 reference stations are set up in Beijing, the data will be collected on the server in a unified manner, and then calculated and then broadcasted, and then passed back to each mobile station through the channel of the 3G or 4G mobile phone to obtain accuracy. . In Huang Haihui's view, although these two precision acquisition methods are still in use, the “China Precision” satellite-based high-precision enhancement method is more economical, accurate and practical in the stage of more efficient grid information transformation. .

According to Huang Haihui, “China Precision” is China's first star-based enhanced service system with world-leading level of global operations. It was built and put into use by Hezhong Shuangzhuang in June 2015. The system provides enhanced services at three different levels of accuracy in the sub-meter, decimeter and centimeter levels. As the "China Precision" of the Beidou satellite navigation satellite-based augmentation system, it is an important part of the Beidou satellite navigation system, which is now serving the global grid users.

Relatively in full swing, the Beidou ground-based augmentation system construction boom, the Beidou-based satellite-based augmentation system is a technical gap in China. At present, most users such as the State Grid are using foreign commercialized satellite-based enhanced service systems, and their information security cannot be guaranteed, and a large amount of service fees must be paid to foreign companies. Huang Haihui said: "The construction of 'China's precision' is not only the needs of enterprises, but also the needs of the industry, but also the needs of the country. As the first global high-precision augmentation system fully constructed and fully controlled by Chinese enterprises, 'China Precision' has full autonomy. Intellectual property rights and total control rights have broken the technological monopoly and blockade of international enterprises, safeguarded the security and autonomy of national geospatial information, and made up for the shortcomings of China's satellite navigation industry in terms of accuracy, usability and integrity."

In satellite navigation applications, higher accuracy means better application results and user experience, especially in the power grid.

The "China Precision" wide-area space-based augmentation system broadcasts differential data to the world through L-band geosynchronous orbit communication satellites, enabling higher-precision signals to be received by areas where more ground-based enhanced network signals cannot be covered. For example, Hezhong Zhuangzhuang “Power Mobile GIS Main Network Inspection System” is a main network inspection program based on the “GeoSourceMobileGISITS” platform, which is developed according to the requirements of the main power network inspection. The “system” adopts the C/S framework and is controlled by the monitoring terminal. The central communication control server and the client monitoring and dispatching center are composed of three main parts. The "system" mainly realizes the unified information management of the daily maintenance inspection of the power main network system infrastructure in the existing power PMIS system business data and the PGIS system geospatial data technology.

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