Reliability Analysis and Improvement Strategies of Microcomputer Relay Protection Devices
Ting Zhao, Qiang Peng · Frontiers in Power and Energy Systems · 2024
In today's increasingly complex power system, microcomputer relay protection device plays a very important role in ensuring the safety and stability of power grid. In this paper, the characteristics of the equipment itself and the external environment are comprehensively considered, and various possible failure modes of relay protection equipment are deeply studied by means of FTA and FMEA. In this paper, a multidisciplinary approach is proposed to collect and analyze the existing failure data, simulate various failure scenarios, evaluate the response efficiency of equipment, and identify key weak links by statistical means. On this basis, combining the indoor test and field debugging results, the targeted improvement measures are put forward from the aspects of hardware redundancy design, software optimization and upgrading, and staff training. The purpose of this paper is to improve the reliability of equipment, reduce the occurrence of sudden power failure accidents and ensure the safety and stability of power grid. Due to the adoption of hardware redundancy technology, the failure detection rate of the system has increased from 85% to 97%, which shows a great improvement. The research results of this paper will greatly improve the adaptability and reliability of microcomputer-based relay protection and promote the scientific and technological progress and development of electric power industry.