Recently, China Machinery Industry Federation organized a product technology appraisal. Xu Ji Group developed the "PAC-8901 precision load control system" passed the technical appraisal.

The appraisal committee reviewed the work report, technical report, new search report and test report, learned the background of the project, the overall design plan, the research on key technologies and product development, and observed the project achievements and the demonstration of the comprehensive R & D and production capacity of XJ Group. Appraisal Committee fully affirmed the innovation and advanced nature of "PAC-8901 Precision Load Control System" and the practicality and necessity of the product in the current power grid situation. They all agreed that the system is reasonable in design, advanced in technology and practical Strong, AC-DC hybrid power system protection in the field of major technological innovations to meet engineering application and technical requirements, the overall technical indicators of the leading international level.

It is reported that "PAC-8901 precision load control system" is an important part of UHV AC and DC power system protection. By comprehensively integrating power grid resources and load, the PAC-8901 precision load control system can realize mutual interaction of power supply, power grid and user load and improve the UHV grid fault Emergency response capability. The system is mainly deployed in the regional power grid cut load station and large power users exclusive substations and distribution substations. In the event of UHV system faults, especially DC faults, the receiving grid needs a large amount of control load, through the classification of load resources, Grading and subregional management, and realizes accurate real-time precise control of interruptible loads of classified users directly by the central control station, effectively reducing the social impact of grid faults and enhancing the fault defense capability of large power grids.

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