Hot spot temperature analysis method for isolating switch dynamic capacity increase

Abstract

The invention provides a hot spot temperature analysis method for isolating switch dynamic capacity increase, relates to the technical field of dynamic capacity increase of isolating switches. The method comprises the following steps: carrying out thermodynamic analysis on the isolating switch, and establishing a steady-state thermal circuit model of the isolating switch according to an analysis result and external environment parameters, the steady-state thermal circuit model comprising a plurality of thermodynamic parameters; performing physical modeling on the isolating switch to obtain a physical model of the isolating switch, and performing finite element simulation calculation on the isolating switch according to the physical model to obtain each thermodynamic parameter; and inputting each thermodynamic parameter into a pre-established steady-state thermal circuit model to obtain the hot spot temperature of the isolating switch. The method is simple and rapid in calculation process, less in required parameters, easy to implement and wide in application range; the calculation accuracy is effectively improved by establishing a physical model; the influence of external environment parameters on the hot spot temperature is comprehensively considered; the method can effectively predict the safety operation time of dynamic capacity increase of the isolation switch, is easy to popularize and implement, and has good economic benefits.

Description

technical field [0001] The invention relates to the technical field of dynamic capacity increase of an isolating switch, in particular to a hot spot temperature analysis method for dynamic capacity increasing of an isolating switch. Background technique [0002] As a key technology for long-distance large-capacity power transmission, UHV transmission can increase the transmission capacity and stability of the system, and has great room for development in the high-end market. In order to meet the needs of large-capacity long-distance power transmission, higher requirements are put forward for the power supply capacity of the existing power transmission system. As one of the most used high-voltage electrical equipment in the high-voltage power grid, the high-voltage disconnector is in the harsh operating environment of high voltage and high current, and its operational reliability and service life will directly affect the stable operation of the power grid. With the rapid dev...

AI Technical Summary

Problems solved by technology

Using this method, the temperature value at any point in the entire solution area can be calculated, and the accuracy is high, but this method requires more accurate equipment structure parameters, and the calculation amount is large, and the real-time performance is poor. It is more suitable for scientific research and qualitative research. Not suitable for in engineering applications

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