The growing adoption of high-voltage transmission technology in China has led to an increase in the construction of converter stations. Consequently

ensuring the smooth operation of power grid has become the focus of attention. The auxiliary power system serves as the power supply support for the entire station and is the foundation for the normal operation of converter station equipment. At present

the auxiliary power system is still adjusted and calculated by the operation and maintenance personnel of converter station

which has problems such as large calculation load

inaccurate calculation

extremely low repetition frequency and increased work costs. Aiming at these problems

a software for relay protection setting of converter station is developed by analyzing the structure of auxiliary power system and the protection value calculation method of auxiliary power. The proposed software can quickly and accurately calculate the protection value

reduce the risk of manual calculation errors

and ensure the safe and stable operation of converter station.