System and Method for Dynamic Capacity Expansion of 220kV Cable

With the daily increase of power load, the existing transmission capacity of the power grid can no longer meet the requirements. At present, the new wire transmission technology has gradually matured in theory and practice. The application of large cross-section wire and heat-resistant wire transmission technology in power grid reconstruction can not only greatly improve the slow road transmission capacity, but also reduce land acquisition and meet the needs of urban construction. This paper studies a dynamic capacity increasing system and method for 220KV cable. In order to solve the problem that the conductor temperature and ampacity of the cable cannot be calculated in real time, and the cooling conditions around the cable are not improved or forced cooling measures are added, including: several optical fiber temperature measurement modules used to detect the external surface temperature and ambient temperature of the cable; several dot voltage grating modules used to measure the cable temperature at the pipe orifice; several thermocouple modules for detecting soil temperature; several sheath current modules used to collect the real-time running current of the cable; several heat dissipation and cooling modules used to improve the heat dissipation conditions around the cable or add forced cooling measures. The diagnostic analysis module is used for real-time conductor temperature and current carrying capacity calculation. The beneficial effects of this paper are that the device can improve the heat dissipation conditions around the cable or can add forced cooling measures. With this method, the real-time conductor temperature and current carrying capacity can be calculated.